1
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Yu H, Yang Z, Han Q, Chen L, Jiang H, Li C. Operando Building of a Superior Interface Hybrid Film Enables Chemomechanically Durable Co-Free Ni-Rich Cathodes. ACS NANO 2024; 18:13428-13436. [PMID: 38725103 DOI: 10.1021/acsnano.4c04125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The Co-free Ni-rich layered cathodes become pivotal to reduce cost and increase benefit toward next-generation Li-ion batteries yet raise a major challenge for their extremely fragile cathode-electrolyte interface (CEI) film. Herein, we report the in situ construction of the Si/B-enriched organic-inorganic hybrid CEI films on LiNi0.9Mn0.1O2 (NM91) with the assistance of tris(trimethylsilyl) borate (TMSB) additive. The hybrid film exhibits superior Young's modulus, mechanical strength, and ductility, which greatly dissipate the microstrain of Co-free Ni-rich cathodes under various states of charge with high structural integrity. Furthermore, the surface oxygen anions have been significantly stabilized by bonding with the Si and B ions of TMSB with high safety. These merits enable a durable Co-free Ni-rich layered cathode with 96.9% and 87.7% capacity retentions (versus 72.7% and 70.2% of NM91) at a high rate of 5C and a high-temperature of 55 °C after 100 cycles. In a pouch-type full cell, 88.8% of initial capacity is still maintained after cycling at 1C for 500 times, greatly expediting the development and application of Co-free Ni-rich layered cathodes.
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Affiliation(s)
- Haifeng Yu
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhaofeng Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qiang Han
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ling Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hao Jiang
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chunzhong Li
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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2
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Sun C, Zhao B, Jing ZF, Zhang H, Wen Q, Chen HZ, Zhang XH, Zheng JC. Suppressed Electrolyte Decomposition Behavior to Improve Cycling Performance of LiCoO 2 under 4.6 V through the Regulation of Interfacial Adsorption Forces. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2309657. [PMID: 38654462 DOI: 10.1002/advs.202309657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 03/16/2024] [Indexed: 04/26/2024]
Abstract
Alleviating the decomposition of the electrolyte is of great significance to improving the cycle stability of cathodes, especially for LiCoO2 (LCO), its volumetric energy density can be effectively promoted by increasing the charge cutoff voltage to 4.6 V, thereby supporting the large-scale application of clean energy. However, the rapid decomposition of the electrolyte under 4.6 V conditions not only loses the transport carrier for lithium ion, but also produces HF and insulators that destroy the interface of LCO and increase impedance. In this work, the decomposition of electrolyte is effectively suppressed by changing the adsorption force between LCO interface and EC. Density functional theory illustrates the LCO coated with lower electronegativity elements has a weaker adsorption force with the electrolyte, the adsorption energy between LCO@Mg and EC (0.49 eV) is weaker than that of LCO@Ti (0.73 eV). Meanwhile, based on the results of time of flight secondary ion mass spectrometry, conductivity-atomic force microscopy, in situ differential electrochemical mass spectrometry, soft X-ray absorption spectroscopy, and nuclear magnetic resonance, as the adsorption force increases, the electrolyte decomposes more seriously. This work provides a new perspective on the interaction between electrolyte and the interface of cathode and further improves the understanding of electrolyte decomposition.
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Affiliation(s)
- Chao Sun
- School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, China
- Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha, 410083, China
- National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha, 410083, China
| | - Bing Zhao
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China
| | - Zhuan-Fang Jing
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China
| | - Hao Zhang
- School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Qing Wen
- School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, China
- Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha, 410083, China
- National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha, 410083, China
| | - He-Zhang Chen
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China
| | - Xia-Hui Zhang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, China
- Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha, 410083, China
- National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha, 410083, China
| | - Jun-Chao Zheng
- School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, China
- Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha, 410083, China
- National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha, 410083, China
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3
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Wang Y, Outka A, Takele WM, Avdeev M, Sainio S, Liu R, Kee V, Choe W, Raji-Adefila B, Nordlund D, Zhou S, Kan WH, Habteyes TG, Chen D. Over-Stoichiometric Metastabilization of Cation-Disordered Rock Salts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306396. [PMID: 37906379 DOI: 10.1002/adma.202306396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 10/30/2023] [Indexed: 11/02/2023]
Abstract
Cation-disordered rock salts (DRXs) are well known for their potential to realize the goal of achieving scalable Ni- and Co-free high-energy-density Li-ion batteries. Unlike in most cathode materials, the disordered cation distribution may lead to more factors that control the electrochemistry of DRXs. An important variable that is not emphasized by research community is regarding whether a DRX exists in a more thermodynamically stable form or a more metastable form. Moreover, within the scope of metastable DRXs, over-stoichiometric DRXs, which allow relaxation of the site balance constraint of a rock salt structure, are particularly underexplored. In this work, these findings are reported in locating a generally applicable approach to "metastabilize" thermodynamically stable Mn-based DRXs to metastable ones by introducing Li over-stoichiometry. The over-stoichiometric metastabilization greatly stimulates more redox activities, enables better reversibility of Li deintercalation/intercalation, and changes the energy storage mechanism. The metastabilized DRXs can be transformed back to the thermodynamically stable form, which also reverts the electrochemical properties, further contrasting the two categories of DRXs. This work enriches the structural and compositional space of DRX families and adds new pathways for rationally tuning the properties of DRX cathodes.
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Affiliation(s)
- You Wang
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Alexandra Outka
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Wassie Mersha Takele
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Maxim Avdeev
- Australian Nuclear Science and Technology Organization (ANSTO), Lucas Heights, NSW, 2234, Australia
- School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Sami Sainio
- SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Rui Liu
- College of Pharmacy, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Vanessa Kee
- Nanoscience & Biomedical Engineering, South Dakota School of Mines & Technology, Rapid City, SD, 57701, USA
| | - Wonu Choe
- Albuquerque Institute for Math & Science, Albuquerque, NM, 87106, USA
| | - Basirat Raji-Adefila
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Dennis Nordlund
- SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Shan Zhou
- Nanoscience & Biomedical Engineering, South Dakota School of Mines & Technology, Rapid City, SD, 57701, USA
| | - Wang Hay Kan
- Spallation Neutron Source Science Center, Dongguan, 523803, China
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Terefe G Habteyes
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Dongchang Chen
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA
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4
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Ahn S, Kim J, Kim B, Kim S. First-principles study on small polaron and Li diffusion in layered LiCoO 2. Phys Chem Chem Phys 2023; 25:27848-27853. [PMID: 37814888 DOI: 10.1039/d3cp02998k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Li-ion conductivity is one of the essential properties that influences the performance of cathode materials for Li-ion batteries. Here, using density functional theory, we investigate the polaron stability and its effect on the Li-ion diffusion in layered LiCoO2 with various magnetic orderings. We show that the local magnetism promotes the localized Co4+ polaron with the Li-diffusion barrier of ∼0.34 eV. While the Li-ion diffuses, the polaron migrates in the opposite direction to the Li movement. In the non-magnetic structure, on the other hand, the polaron does not form, and the Li diffusion barrier is lowered to 0.21 eV. Although the presence of the polaron raises the diffusion barrier, the magnetically ordered structures are energetically more stable during the migration than the non-magnetic case. Thus, our work advocates the hole polaron migration scenario for Li-ion diffusion. We further demonstrate that the strong electron correlation of Co ions plays an essential role in stabilizing the Co4+ polaron.
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Affiliation(s)
- Seryung Ahn
- Department of Physics, Kyungpook National University, Daegu 41566, South Korea
| | - Jiyeon Kim
- Department of Physics Education, Kyungpook National University, Daegu 41566, South Korea.
- The Center for High Energy Physics, Kyungpook National University, Daegu 41566, South Korea
| | - Bongjae Kim
- Department of Physics, Kyungpook National University, Daegu 41566, South Korea
- Department of Physics, Kunsan National University, Gunsan 54150, Korea
| | - Sooran Kim
- Department of Physics Education, Kyungpook National University, Daegu 41566, South Korea.
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5
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Salagre E, Segovia P, González-Barrio MÁ, Jugovac M, Moras P, Pis I, Bondino F, Pearson J, Wang RS, Takeuchi I, Fuller EJ, Talin AA, Mascaraque A, Michel EG. Physical Delithiation of Epitaxial LiCoO 2 Battery Cathodes as a Platform for Surface Electronic Structure Investigation. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37466037 PMCID: PMC10401565 DOI: 10.1021/acsami.3c06147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
We report a novel delithiation process for epitaxial thin films of LiCoO2(001) cathodes using only physical methods, based on ion sputtering and annealing cycles. Preferential Li sputtering followed by annealing produces a surface layer with a Li molar fraction in the range 0.5 < x < 1, characterized by good crystalline quality. This delithiation procedure allows the unambiguous identification of the effects of Li extraction without chemical byproducts and experimental complications caused by electrolyte interaction with the LiCoO2 surface. An analysis by X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) provides a detailed description of the delithiation process and the role of O and Co atoms in charge compensation. We observe the simultaneous formation of Co4+ ions and of holes localized near O atoms upon Li removal, while the surface shows a (2 × 1) reconstruction. The delithiation method described here can be applied to other crystalline battery elements and provide information on their properties that is otherwise difficult to obtain.
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Affiliation(s)
- Elena Salagre
- Dto. Física Materia Condensada, Univ. Autónoma de Madrid, 28049 Madrid, Spain
| | - Pilar Segovia
- Dto. Física Materia Condensada, Univ. Autónoma de Madrid, 28049 Madrid, Spain
- IFIMAC (Condensed Matter Physics Center), Univ. Autónoma de Madrid, 28049 Madrid, Spain
| | | | - Matteo Jugovac
- Istituto di Struttura della Materia-CNR (ISM-CNR), Trieste 34149, Italy
| | - Paolo Moras
- Istituto di Struttura della Materia-CNR (ISM-CNR), Trieste 34149, Italy
| | - Igor Pis
- IOM CNR Laboratorio TASC, AREA Science Park, Trieste 34149, Italy
| | - Federica Bondino
- IOM CNR Laboratorio TASC, AREA Science Park, Trieste 34149, Italy
| | - Justin Pearson
- Materials Science and Engineering, Univ. of Maryland, College Park, Maryland 20742, United States
| | - Richmond Shiwei Wang
- Materials Science and Engineering, Univ. of Maryland, College Park, Maryland 20742, United States
| | - Ichiro Takeuchi
- Materials Science and Engineering, Univ. of Maryland, College Park, Maryland 20742, United States
| | - Elliot J Fuller
- Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Alec A Talin
- Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550, United States
| | - Arantzazu Mascaraque
- Dto. Física de Materiales, Fac. Ciencias Físicas, Univ. Complutense de Madrid, 28040 Madrid, Spain
| | - Enrique G Michel
- Dto. Física Materia Condensada, Univ. Autónoma de Madrid, 28049 Madrid, Spain
- IFIMAC (Condensed Matter Physics Center), Univ. Autónoma de Madrid, 28049 Madrid, Spain
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6
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Oh H, Shin SJ, Choi E, Yamagishi H, Ohta T, Yabuuchi N, Jung HG, Kim H, Byon HR. Anion-Induced Interfacial Liquid Layers on LiCoO 2 in Salt-in-Water Lithium-Ion Batteries. JACS AU 2023; 3:1392-1402. [PMID: 37234123 PMCID: PMC10206596 DOI: 10.1021/jacsau.3c00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/27/2023]
Abstract
The incompatibility of lithium intercalation electrodes with water has impeded the development of aqueous Li-ion batteries. The key challenge is protons which are generated by water dissociation and deform the electrode structures through intercalation. Distinct from previous approaches utilizing large amounts of electrolyte salts or artificial solid-protective films, we developed liquid-phase protective layers on LiCoO2 (LCO) using a moderate concentration of 0.5∼3 mol kg-1 lithium sulfate. Sulfate ion strengthened the hydrogen-bond network and easily formed ion pairs with Li+, showing strong kosmotropic and hard base characteristics. Our quantum mechanics/molecular mechanics (QM/MM) simulations revealed that sulfate ion paired with Li+ helped stabilize the LCO surface and reduced the density of free water in the interface region below the point of zero charge (PZC) potential. In addition, in situ electrochemical surface-enhanced infrared absorption spectroscopy (SEIRAS) proved the appearance of inner-sphere sulfate complexes above the PZC potential, serving as the protective layers of LCO. The role of anions in stabilizing LCO was correlated with kosmotropic strength (sulfate > nitrate > perchlorate > bistriflimide (TFSI-)) and explained better galvanostatic cyclability in LCO cells.
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Affiliation(s)
- Hyunjeong Oh
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
| | - Seung-Jae Shin
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Eunjin Choi
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
| | - Hirona Yamagishi
- Sychrotron
Radiation (SR) Center, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Toshiaki Ohta
- Sychrotron
Radiation (SR) Center, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Naoaki Yabuuchi
- Department
of Chemistry and Life Science, Yokohama
National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Hun-Gi Jung
- Energy
Storage Research Center, Clean Energy Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hyungjun Kim
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hye Ryung Byon
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Advanced
Battery Center, KAIST Institute for NanoCentury, Daejeon 34141, Republic of Korea
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7
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Zhang J, Wong D, Zhang Q, Zhang N, Schulz C, Bartkowiak M, An K, Gu L, Hu Z, Liu X. Reducing Co/O Band Overlap through Spin State Modulation for Stabilized High Capability of 4.6 V LiCoO 2. J Am Chem Soc 2023; 145:10208-10219. [PMID: 37098172 DOI: 10.1021/jacs.3c01128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
High-voltage LiCoO2 (LCO) attracts great interest because of its large specific capacity, but it suffers from oxygen release, structural degradation, and quick capacity drop. These daunting issues root from the inferior thermodynamics and kinetics of the triggered oxygen anion redox (OAR) at high voltages. Herein, a tuned redox mechanism with almost only Co redox is demonstrated by atomically engineered high-spin LCO. The high-spin Co network reduces the Co/O band overlap, eliminates the adverse phase transition of O3 → H1-3, delays the exceeding of the O 2p band over the Fermi level, and suppresses excessive O → Co charge transfer at high voltages. This function intrinsically promotes Co redox and restrains O redox, fundamentally addressing the issues of O2 release and coupled detrimental Co reduction. Moreover, the chemomechanical heterogeneity caused by different kinetics of Co/O redox centers and the inferior rate performance limited by slow O redox kinetics is simultaneously improved owing to the suppression of slow OAR and the excitation of fast Co redox. The modulated LCO delivers ultrahigh rate capacities of 216 mAh g-1 (1C) and 195 mAh g-1(5C), as well as high capacity retentions of 90.4% (@100 cycles) and 86.9% (@500 cycles). This work sheds new light on the design for a wide range of O redox cathodes.
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Affiliation(s)
- Jicheng Zhang
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Deniz Wong
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, P. R. China
| | - Nian Zhang
- Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Christian Schulz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Maciej Bartkowiak
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin D-14109, Germany
| | - Ke An
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, P. R. China
| | - Zhongbo Hu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiangfeng Liu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
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8
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Zhang W, Hosono E, Asakura D, Yuzawa H, Ohigashi T, Kobayashi M, Kiuchi H, Harada Y. Chemical-state distributions in charged LiCoO 2 cathode particles visualized by soft X-ray spectromicroscopy. Sci Rep 2023; 13:4639. [PMID: 36944681 PMCID: PMC10030574 DOI: 10.1038/s41598-023-30673-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 02/28/2023] [Indexed: 03/23/2023] Open
Abstract
Lithium-ion deintercalation/intercalation during charge/discharge processes is one of the essential reactions that occur in the layered cathodes of lithium-ion batteries, and the performance of the cathode can be expressed as the sum of the reactions that occur in the local area of the individual cathode particles. In this study, the spatial distributions of the chemical states present in prototypical layered LiCoO2 cathode particles were determined at different charging conditions using scanning transmission X-ray microscopy (STXM) with a spatial resolution of approximately 100 nm. The Co L3- and O K-edge X-ray absorption spectroscopy (XAS) spectra, extracted from the same area of the corresponding STXM images, at the initial state as well as after charging to 4.5 V demonstrate the spatial distribution of the chemical state changes depending on individual particles. In addition to the Co L3-edge XAS spectra, the O K-edge XAS spectra of the initial and charged LiCoO2 particles are different, indicating that both the Co and O sites participate in charge compensation during the charging process possibly through the hybridization between the Co 3d and O 2p orbitals. Furthermore, the element maps of both the Co and O sites, derived from the STXM stack images, reveal the spatial distribution of the chemical states inside individual particles after charging to 4.5 V. The element mapping analysis suggests that inhomogeneous reactions occur on the active particles and confirm the existence of non-active particles. The results of this study demonstrate that an STXM-based spatially resolved electronic structural analysis method is useful for understanding the charging and discharging of battery materials.
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Affiliation(s)
- Wenxiong Zhang
- Institute for Solid State Physics (ISSP), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Eiji Hosono
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan.
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan.
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8565, Japan.
| | - Daisuke Asakura
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8565, Japan
| | - Hayato Yuzawa
- UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - Takuji Ohigashi
- UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - Masaki Kobayashi
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8656, Japan
- Center for Spintronics Research Network, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan
| | - Hisao Kiuchi
- Institute for Solid State Physics (ISSP), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Yoshihisa Harada
- Institute for Solid State Physics (ISSP), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan.
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8565, Japan.
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9
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Kang W, Wei R, Yin H, Li D, Chen Z, Huang Q, Zhang P, Jing H, Wang X, Li C. Unraveling Sequential Oxidation Kinetics and Determining Roles of Multi-Cobalt Active Sites on Co 3O 4 Catalyst for Water Oxidation. J Am Chem Soc 2023; 145:3470-3477. [PMID: 36724407 DOI: 10.1021/jacs.2c11508] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The multi-redox mechanism involving multi-sites has great implications to dictate the catalytic water oxidation. Understanding the sequential dynamics of multi-steps in oxygen evolution reaction (OER) cycles on working catalysts is a highly important but challenging issue. Here, using quasi-operando transient absorption (TA) spectroscopy and a typical photosensitization strategy, we succeeded in resolving the sequential oxidation kinetics involving multi-active sites for water oxidation in OER catalytic cycle, with Co3O4 nanoparticles as model catalysts. When OER initiates from fast oxidation of surface Co2+ ions, both surface Co2+ and Co3+ ions are active sites of the multi-cobalt centers for water oxidation. In the sequential kinetics (Co2+ → Co3+ → Co4+), the key characteristic is fast oxidation and slow consumption for all the cobalt species. Due to this characteristic, the Co4+ intermediate distribution plays a determining role in OER activity and results in the slow overall OER kinetics. These insights shed light on the kinetic understanding of water oxidation on heterogeneous catalysts with multi-sites.
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Affiliation(s)
- Wanchao Kang
- Key Laboratory of Advanced Catalysis, Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China.,State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Ruifang Wei
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Heng Yin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Dongfeng Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zheng Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Qinge Huang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Pengfei Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Huanwang Jing
- Key Laboratory of Advanced Catalysis, Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xiuli Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Can Li
- Key Laboratory of Advanced Catalysis, Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China.,State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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10
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Li Q, Liang Q, Zhang H, Jiao S, Zhuo Z, Wang J, Li Q, Zhang JN, Yu X. Unveiling the High-valence Oxygen Degradation Across the Delithiated Cathode Surface. Angew Chem Int Ed Engl 2023; 62:e202215131. [PMID: 36471651 DOI: 10.1002/anie.202215131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Charge compensation on anionic redox reaction (ARR) has been promising to realize extra capacity beyond transition metal redox in battery cathodes. The practical development of ARR capacity has been hindered by high-valence oxygen instability, particularly at cathode surfaces. However, the direct probe of surface oxygen behavior has been challenging. Here, the electronic states of surface oxygen are investigated by combining mapping of resonant Auger electronic spectroscopy (mRAS) and ambient pressure X-ray photoelectron spectroscopy (APXPS) on a model LiCoO2 cathode. The mRAS verified that no high-valence oxygen can sustain at cathode surfaces, while APXPS proves that cathode electrolyte interphase (CEI) layer evolves and oxidizes upon oxygen gas contact. This work provides valuable insights into the high-valence oxygen degradation mode across the interface. Oxygen stabilization from surface architecture is proven a prerequisite to the practical development of ARR active cathodes.
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Affiliation(s)
- Qinghao Li
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao, 266071, China.,Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qi Liang
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao, 266071, China
| | - Hui Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Sichen Jiao
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zengqing Zhuo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Junyang Wang
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qiang Li
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao, 266071, China
| | - Jie-Nan Zhang
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiqian Yu
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
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11
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Do VH, Lee JM. Orbital Occupancy and Spin Polarization: From Mechanistic Study to Rational Design of Transition Metal-Based Electrocatalysts toward Energy Applications. ACS NANO 2022; 16:17847-17890. [PMID: 36314471 DOI: 10.1021/acsnano.2c08919] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Over the past few decades, development of electrocatalysts for energy applications has extensively transitioned from trial-and-error methodologies to more rational and directed designs at the atomic levels via either nanogeometric optimization or modulating electronic properties of active sites. Regarding the modulation of electronic properties, nonprecious transition metal-based materials have been attracting large interest due to the capability of versatile tuning d-electron configurations expressed through the flexible orbital occupancy and various possible degrees of spin polarization. Herein, recent advances in tailoring electronic properties of the transition-metal atoms for intrinsically enhanced electrocatalytic performances are reviewed. We start with discussions on how orbital occupancy and spin polarization can govern the essential atomic level processes, including the transport of electron charge and spin in bulk, reactive species adsorption on the catalytic surface, and the electron transfer between catalytic centers and adsorbed species as well as reaction mechanisms. Subsequently, different techniques currently adopted in tuning electronic structures are discussed with particular emphasis on theoretical rationale and recent practical achievements. We also highlight the promises of the recently established computational design approaches in developing electrocatalysts for energy applications. Lastly, the discussion is concluded with perspectives on current challenges and future opportunities. We hope this review will present the beauty of the structure-activity relationships in catalysis sciences and contribute to advance the rational development of electrocatalysts for energy conversion applications.
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Affiliation(s)
- Viet-Hung Do
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
| | - Jong-Min Lee
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
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12
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Sustainable LiCoO 2 by collective glide of CoO 6 slabs upon charge/discharge. Proc Natl Acad Sci U S A 2022; 119:e2120060119. [PMID: 35561218 DOI: 10.1073/pnas.2120060119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
SignificanceTraditional views indicate that the well-known layered LiCoO2 cathode delivers a typical solid-solution reaction upon delithiation. The problem is that "solid solution" is a vague concept, and the phase transition remains ambiguous. Here, we reveal a mechanism with the collective and quasi-continuous glide of CoO6 slabs in layered LiCoO2 through combining in situ XRD and ex situ STEM characterizations. Such a delithiation mechanism does not involve the nucleation-and-growth-type delithiation process and represents a completely different manner from the conventional two-phase or solid solution-phase transition processes. The lessons provide a different insight into understanding the working mechanism of layered oxide materials.
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13
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Hong M, Lee S, Ho VC, Lee D, Yu SH, Mun J. Unraveling the Dynamic Interfacial Behavior of LiCoO 2 at Various Voltages with Lithium Bis(oxalato)borate for Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:10267-10276. [PMID: 35188752 DOI: 10.1021/acsami.1c21952] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The electrochemical dynamic behavior of the solid electrolyte interface (SEI) formed on LiCoO2 (LCO) by lithium bis(oxalato)borate (LiBOB) is investigated at various cutoff voltages. Particularly, for layered cathode active materials, various cutoff voltages are used to control the delithiation states; however, systematic investigations of the voltage and SEI are lacking. To increase the practical energy density of the LCO, a high cutoff voltage is pursued to utilize a state of high delithiation. However, this high cutoff voltage causes the electrolyte to undergo side reactions and the crystalline structure changes irreversibly, limiting the cycle life. In a low-voltage environment (<4.7 V), LiBOB improves the initial Coulombic efficiency and cycling performance by forming an effective SEI, which suppresses side reactions. At higher voltage levels (4.7-4.9 V), LiBOB no longer effectively protects the surface, causing the electrochemical performance to decrease rapidly. The main cause of this phenomenon is the decomposition of LiBOB-SEI at a high voltage, as shown by systematic surface and electrochemical analyses comprising linear sweep voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy. In conclusion, LiBOB can suppress side reactions of the electrolyte by SEI formation, but the SEI decomposes at voltage levels higher than 4.7 V.
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Affiliation(s)
- Meihua Hong
- Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Subin Lee
- Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea
| | - Van-Chuong Ho
- Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Daon Lee
- Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Seung-Ho Yu
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Junyoung Mun
- Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
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14
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Hwang YY, Han JH, Park SH, Jung JE, Lee NK, Lee YJ. Understanding anion-redox reactions in cathode materials of lithium-ion batteries through in situcharacterization techniques: a review. NANOTECHNOLOGY 2022; 33:182003. [PMID: 35042200 DOI: 10.1088/1361-6528/ac4c60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
As the demand for rechargeable lithium-ion batteries (LIBs) with higher energy density increases, the interest in lithium-rich oxide (LRO) with extraordinarily high capacities is surging. The capacity of LRO cathodes exceeds that of conventional layered oxides. This has been attributed to the redox contribution from both cations and anions, either sequentially or simultaneously. However, LROs with notable anion redox suffer from capacity loss and voltage decay during cycling. Therefore, a fundamental understanding of their electrochemical behaviors and related structural evolution is a prerequisite for the successful development of high-capacity LRO cathodes with anion redox activity. However, there is still controversy over their electrochemical behavior and principles of operation. In addition, complicated redox mechanisms and the lack of sufficient analytical tools render the basic study difficult. In this review, we aim to introduce theoretical insights into the anion redox mechanism andin situanalytical instruments that can be used to prove the mechanism and behavior of cathodes with anion redox activity. We summarized the anion redox phenomenon, suggested mechanisms, and discussed the history of development for anion redox in cathode materials of LIBs. Finally, we review the recent progress in identification of reaction mechanisms in LROs and validation of engineering strategies to improve cathode performance based on anion redox through various analytical tools, particularly,in situcharacterization techniques. Because unexpected phenomena may occur during cycling, it is crucial to study the kinetic properties of materialsin situunder operating conditions, especially for this newly investigated anion redox phenomenon. This review provides a comprehensive perspective on the future direction of studies on materials with anion redox activity.
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Affiliation(s)
- Ye Yeong Hwang
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Ji Hyun Han
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sol Hui Park
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Ji Eun Jung
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Nam Kyeong Lee
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Yun Jung Lee
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
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15
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Feng Z, Song H, Li Y, Lyu Y, Xiao D, Guo B. Adjusting Oxygen Redox Reaction and Structural Stability of Li- and Mn-Rich Cathodes by Zr-Ti Dual-Doping. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5308-5317. [PMID: 35073038 DOI: 10.1021/acsami.1c20880] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Li- and Mn-rich cathodes (LMRs) with cationic and anionic redox reactions are considered as promising cathode materials for high-energy-density Li-ion batteries. However, the oxygen redox process leads to lattice oxygen loss and structure degradation, which would induce serious voltage fade and capacity loss and thus limit the practical application. High-valent and electrochemical inactive d0 element doping is an effective method to tune the crystal and electronic structures, which are the main factors for the electrochemical stability. Herein, noticeably inhibited oxygen loss, reduced voltage fade, enhanced rate performance, and improved structure stability and thermal stability of LMRs have been realized by Ti4+ and Zr4+ dual-doping. The underlying modulation mechanisms are unraveled by combining differential electrochemical mass spectrometry, soft X-ray absorption spectroscopies, in situ XRD measurements, etc. The dual-doping reduces the covalency of the TM-O bond, mitigates the irreversible oxygen release during the oxygen redox, and stabilizes the layered framework. The expanded lithium layer facilitates the lithium diffusion kinetics and structure stability. This study may result in the fundamental understanding of crystal and electronic structure evolution in LMRs and contribute to the development of high capacity cathodes.
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Affiliation(s)
- Zhijie Feng
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
| | - Hui Song
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
| | - Yuanhang Li
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
| | - Yingchun Lyu
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
| | - Dongdong Xiao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Bingkun Guo
- Materials Genome Institute, Shanghai University, Shanghai 200444, China
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16
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Dou Y, Yuan D, Yu L, Zhang W, Zhang L, Fan K, Al-Mamun M, Liu P, He CT, Zhao H. Interpolation between W Dopant and Co Vacancy in CoOOH for Enhanced Oxygen Evolution Catalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2104667. [PMID: 34693576 DOI: 10.1002/adma.202104667] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 10/09/2021] [Indexed: 06/13/2023]
Abstract
Electronic structure engineering via integrating two defect structures with opposite modulation effects holds the key to fully unlocking the power of a catalyst. Herein, an interpolation principle is proposed to activate CoOOH via W doping and Co vacancies for the oxygen evolution reaction. Density functional theory suggests opposite roles for the W dopant and the Co vacancy but a synergy between them in tuning the electronic states of the Co site, leading to near-ideal intermediate energetics and dramatically lowered catalytic overpotential. Experimental studies confirm the modulation of the electronic structure and validate the greatly enhanced catalytic activity with a small overpotential of 298.5 mV to drive 50 mA cm-2 . The discovery of the interpolation between dopants and vacancies opens up a new methodology to design efficient catalysts for various electrochemical reactions.
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Affiliation(s)
- Yuhai Dou
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
- Shandong Institute of Advanced Technology, Jinan, 250100, China
| | - Ding Yuan
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
| | - Linping Yu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha, 410114, China
| | - Weiping Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Lei Zhang
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
| | - Kaicai Fan
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
| | - Mohammad Al-Mamun
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
| | - Porun Liu
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
| | - Chun-Ting He
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China
| | - Huijun Zhao
- Centre for Catalysis and Clean Energy, Gold Coast Campus, Griffith University, Gold Coast, 4222, Australia
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17
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Hu S, Zhu Y, Han W, Li X, Ji Y, Ye M, Jin C, Liu Q, Hu S, Wang J, Wang J, He J, Cazorla C, Chen L. High-Conductive Protonated Layered Oxides from H 2 O Vapor-Annealed Brownmillerites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2104623. [PMID: 34590356 DOI: 10.1002/adma.202104623] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Protonated 3d transition-metal oxides often display low electronic conduction, which hampers their application in electric, magnetic, thermoelectric, and catalytic fields. Electronic conduction can be enhanced by co-inserting oxygen acceptors simultaneously. However, the currently used redox approaches hinder protons and oxygen ions co-insertion due to the selective switching issues. Here, a thermal hydration strategy for systematically exploring the synthesis of conductive protonated oxides from 3d transition-metal oxides is introduced. This strategy is illustrated by synthesizing a novel layered-oxide SrCoO3 H from the brownmillerite SrCoO2.5 . Compared to the insulating SrCoO2.5 , SrCoO3 H exhibits an unprecedented high electronic conductivity above room temperature, water uptake at 250 °C, and a thermoelectric power factor of up to 1.2 mW K-2 m-1 at 300 K. These findings open up opportunities for creating high-conductive protonated layered oxides by protons and oxygen ions co-doping.
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Affiliation(s)
- Songbai Hu
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuanmin Zhu
- School of Material Science and Engineering, Dongguan University of Technology, Dongguan, 523000, China
| | - Wenqiao Han
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiaowen Li
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yanjiang Ji
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Mao Ye
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Cai Jin
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Qi Liu
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Sixia Hu
- SUSTech Core Research Facilities, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jiaou Wang
- Laboratory of Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039, China
| | - Junling Wang
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jiaqing He
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Claudio Cazorla
- Departament de Física, Universitat Politècnica de Catalunya, Campus Nord B4-B5, Barcelona, E-08034, Spain
| | - Lang Chen
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
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18
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Xiao J, Niu B, Xu Z. Highly efficient selective recovery of lithium from spent lithium-ion batteries by thermal reduction with cheap ammonia reagent. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126319. [PMID: 34329006 DOI: 10.1016/j.jhazmat.2021.126319] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/27/2021] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
The rapid development of new energy technology leads to explosive growth of lithium-ion batteries (LIBs) industry which greatly alleviates the problems of environmental pollution and energy shortage. However, how to realize resource circulation of critical metals including lithium (Li) and cobalt (Co) becomes the new problem of LIBs industry. This paper proposes an improved thermal reduction technology to efficiently recycle Li and Co from spent LIBs, where cheap urea is applied as the only additive to provide ammonia (NH3). By thermal reduction, LiCoO2 was thermally reduced into water-soluble lithium carbonate and water-insoluble cobalt metal Under the optimal conditions, 99.96% Li with nearly 100% selectivity was obtained by water leaching. More importantly, the concept of "oxygen elements removal (OER)" was proposed to explain the metal extraction from spent LIBs, which could help to describe the reaction mechanism as O-cage digestion mechanism. Furthermore, metal extraction from spent LIBs was re-understood as "seeking an applicable reductant", which provided a fresh perspective for understanding Li selective recovery. These concepts and findings can provide some inspiration for metal recovery from spent LIBs.
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Affiliation(s)
- Jiefeng Xiao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Bo Niu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Zhenming Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, People's Republic of China.
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19
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NAGAMI T, NOMOTO T, SUGIYAMA H, TACHIKI S, SAKAMOTO R, OHTA T. Capacity Deterioration Analysis of Li-ion Battery Cathode Li[Ni 1/3Co 1/3Mn 1/3]O 2 Material by Soft X-ray Absorption Spectroscopy. ELECTROCHEMISTRY 2021. [DOI: 10.5796/electrochemistry.21-00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Tetsuo NAGAMI
- Aichi Synchrotron Radiation Center, Aichi Science & Technology Foudation
| | - Toyokazu NOMOTO
- Aichi Synchrotron Radiation Center, Aichi Science & Technology Foudation
| | - Harue SUGIYAMA
- Aichi Synchrotron Radiation Center, Aichi Science & Technology Foudation
| | - Shoji TACHIKI
- Aichi Synchrotron Radiation Center, Aichi Science & Technology Foudation
| | | | - Toshiaki OHTA
- Aichi Synchrotron Radiation Center, Aichi Science & Technology Foudation
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20
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Zhang N, Wang C, Chen J, Hu C, Ma J, Deng X, Qiu B, Cai L, Xiong Y, Chai Y. Metal Substitution Steering Electron Correlations in Pyrochlore Ruthenates for Efficient Acidic Water Oxidation. ACS NANO 2021; 15:8537-8548. [PMID: 33939408 DOI: 10.1021/acsnano.1c00266] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Exploring the advanced oxygen evolution reaction (OER) electrocatalysts is highly desirable toward sustainable energy conversion and storage, yet improved efficiency in acidic media is largely hindered by its sluggish reaction kinetics. Herein, we rationally manipulate the electronic states of the strongly electron correlated pyrochlore ruthenate Y2Ru2O7 alternative through partial A-site substitution of Sr2+ for Y3+, efficiently improving its intrinsic OER activity. The optimized Y1.7Sr0.3Ru2O7 candidate observes a highly intrinsic mass activity of 1018 A gRu-1 at an overpotential of 300 mV with excellent durability in 0.5 M H2SO4 electrolyte. Combining synchrotron-radiation X-ray spectroscopic investigations with theoretical simulations, we reveal that the electron correlations in the Ru 4d band are weakened through coordinatively geometric regulation and charge redistribution by the exotic Sr2+ cation, enabling the delocalization of Ru 4d electrons via an insulator-to-metal transition. The induced Ru-O covalency promotion and band alignment rearrangement decreases the charge transfer energy to accelerate interfacial charge transfer kinetics. Meanwhile, the chemical affinity of oxygen intermediates is also rationalized to weaken the metal-oxygen binding strength, thus lowering the energy barrier of the overall reaction. This work offers fresh insights into designing advanced solid-state electrocatalysts and underlines the versatility of electronic structure manipulation in tuning catalytic activity.
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Affiliation(s)
- Ning Zhang
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Cong Wang
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Jiewei Chen
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Canyu Hu
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Jun Ma
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xi Deng
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Bocheng Qiu
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Lejuan Cai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Yujie Xiong
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Yang Chai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, People's Republic of China
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21
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Németh K. Radical anion functionalization of two-dimensional materials as a means of engineering simultaneously high electronic and ionic conductivity solids. NANOTECHNOLOGY 2021; 32:245709. [PMID: 33760756 DOI: 10.1088/1361-6528/abd1a8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A radical anion based functionalization of the basal plane of hexagonal boron nitride (h-BN) and other two-dimensional materials is proposed in the present study. The resulting materials can reversibly be oxidized without the detachment of the functional groups from the basal plane and can thus serve as surface-intercalation type cathode electroactive species and fast solid ion conductors at the same time. The functionalization of h-BN with [·OBX3]- radical anions (X=F, Cl) in the presence of Li, Na or Mg cations provides one example of such systems. This material can be realized in a proposed simple, two step synthesis. In the first step, a symmetric Lewis adduct of the corresponding Li, Na or Mg peroxides is formed with BX3. In the second step, the anion of the Lewis adduct is thermally split into two identical [·OBX3]- radical anions that covalently functionalize the B atoms of h-BN. In the maximum density surface packing functionalization, the product of the synthesis is A n [(BN)2OBX3] (A = Li, Na with n = 1 or A = Mg with n = 0.5). Its ionic conductivity is predicted to be in the order of 0.01-0.1 S cm-1 at room temperature, on the basis of Grotthus-like (or paddle-wheel) ion transport. In the highly oxidized states (0 ≤ n ≤ 1 for Li and Na and 0 ≤ n ≤ 0.5 for Mg), the electronic conductivity of this material is in the order of 1 S cm-1, similar to carbon black. In the fully reduced states (n = 2 for Li and Na and n = 1 for Mg), the material becomes an insulator, like h-BN. The tunability of the electronic properties of A n [(BN)2OBX3] via the cation concentration (n) allows for its application as multifunctional material in energy storage devices, simultaneously serving as cathode active species, solid electrolyte, electroconductive additive, separator, heat conductor and coating for metal anodes that enables dendrite-free plating. This multifunctionality reduces the number of phases needed in an all-solid-state battery or supercapacitor and thus reduces the interfacial impedance making energy storage devices more efficient. For example, Li[(BN)2OBF3] is predicted to have 5.6 V open circuit voltage versus Li metal anode, capacity of 191 mAh g- 1, specific energy of 1067 Wh kg- 1 and can store energy at a (materials only) cost of 24 USD kWh- 1.
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Affiliation(s)
- Károly Németh
- Physics Department, Illinois Institute of Technology, Chicago, IL 60616, United States of America
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22
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Tang ZK, Xue YF, Teobaldi G, Liu LM. The oxygen vacancy in Li-ion battery cathode materials. NANOSCALE HORIZONS 2020; 5:1453-1466. [PMID: 33103682 DOI: 10.1039/d0nh00340a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The substantial capacity gap between available anode and cathode materials for commercial Li-ion batteries (LiBs) remains, as of today, an unsolved problem. Oxygen vacancies (OVs) can promote Li-ion diffusion, reduce the charge transfer resistance, and improve the capacity and rate performance of LiBs. However, OVs can also lead to accelerated degradation of the cathode material structure, and from there, of the battery performance. Understanding the role of OVs for the performance of layered lithium transition metal oxides holds great promise and potential for the development of next generation cathode materials. This review summarises some of the most recent and exciting progress made on the understanding and control of OVs in cathode materials for Li-ion battery, focusing primarily on Li-rich layered oxides. Recent successes and residual unsolved challenges are presented and discussed to stimulate further interest and research in harnessing OVs towards next generation oxide-based cathode materials.
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Affiliation(s)
- Zhen-Kun Tang
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421002, China
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23
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Kiuchi H, Hikima K, Shimizu K, Kanno R, Toshiharu F, Matsubara E. Operando hard X-ray photoelectron spectroscopy of LiCoO2 thin film in an all-solid-state lithium ion battery. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106790] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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24
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Zhou J, Zhang L, Huang YC, Dong CL, Lin HJ, Chen CT, Tjeng LH, Hu Z. Voltage- and time-dependent valence state transition in cobalt oxide catalysts during the oxygen evolution reaction. Nat Commun 2020; 11:1984. [PMID: 32332788 PMCID: PMC7181785 DOI: 10.1038/s41467-020-15925-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 04/01/2020] [Indexed: 12/31/2022] Open
Abstract
The ability to determine the electronic structure of catalysts during electrochemical reactions is highly important for identification of the active sites and the reaction mechanism. Here we successfully applied soft X-ray spectroscopy to follow in operando the valence and spin state of the Co ions in Li2Co2O4 under oxygen evolution reaction (OER) conditions. We have observed that a substantial fraction of the Co ions undergo a voltage-dependent and time-dependent valence state transition from Co3+ to Co4+ accompanied by spontaneous delithiation, whereas the edge-shared Co-O network and spin state of the Co ions remain unchanged. Density functional theory calculations indicate that the highly oxidized Co4+ site, rather than the Co3+ site or the oxygen vacancy site, is mainly responsible for the high OER activity.
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Affiliation(s)
- Jing Zhou
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Linjuan Zhang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yu-Cheng Huang
- Department of Physics, Tamkang University, 151 Yingzhuan Road, New Taipei City, 25137, Taiwan
| | - Chung-Li Dong
- Department of Physics, Tamkang University, 151 Yingzhuan Road, New Taipei City, 25137, Taiwan
| | - Hong-Ji Lin
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - Chien-Te Chen
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - L H Tjeng
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany.
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25
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Song S, Zhou J, Sun J, Zhang S, Lin X, Hu Z, Hu J, Zhang L, Wang JQ. Understanding the origin of high oxygen evolution reaction activity in the high Sr-doped perovskite. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63441-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Li M, Liu T, Bi X, Chen Z, Amine K, Zhong C, Lu J. Cationic and anionic redox in lithium-ion based batteries. Chem Soc Rev 2020; 49:1688-1705. [DOI: 10.1039/c8cs00426a] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review will present the current understanding, experimental evidence and future direction of anionic and cationic redox for Li-ion batteries.
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Affiliation(s)
- Matthew Li
- Chemical Sciences and Engineering Division
- Argonne National Laboratory
- Lemont
- USA
- Department of Chemical Engineering
| | - Tongchao Liu
- Chemical Sciences and Engineering Division
- Argonne National Laboratory
- Lemont
- USA
| | - Xuanxuan Bi
- Chemical Sciences and Engineering Division
- Argonne National Laboratory
- Lemont
- USA
| | - Zhongwei Chen
- Department of Chemical Engineering
- Waterloo Institute of Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Khalil Amine
- Chemical Sciences and Engineering Division
- Argonne National Laboratory
- Lemont
- USA
- Department of Material Science and Engineering
| | - Cheng Zhong
- School of Materials Science and Engineering
- Tianjin University
- Tianjin
- China
| | - Jun Lu
- Chemical Sciences and Engineering Division
- Argonne National Laboratory
- Lemont
- USA
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27
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Zhu Y, Tahini HA, Hu Z, Chen ZG, Zhou W, Komarek AC, Lin Q, Lin HJ, Chen CT, Zhong Y, Fernández-Díaz MT, Smith SC, Wang H, Liu M, Shao Z. Boosting Oxygen Evolution Reaction by Creating Both Metal Ion and Lattice-Oxygen Active Sites in a Complex Oxide. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905025. [PMID: 31713899 DOI: 10.1002/adma.201905025] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 10/08/2019] [Indexed: 05/22/2023]
Abstract
Developing efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) is of paramount importance to many chemical and energy transformation technologies. The diversity and flexibility of metal oxides offer numerous degrees of freedom for enhancing catalytic activity by tailoring their physicochemical properties, but the active site of current metal oxides for OER is still limited to either metal ions or lattice oxygen. Here, a new complex oxide with unique hexagonal structure consisting of one honeycomb-like network, Ba4 Sr4 (Co0.8 Fe0.2 )4 O15 (hex-BSCF), is reported, demonstrating ultrahigh OER activity because both the tetrahedral Co ions and the octahedral oxygen ions on the surface are active, as confirmed by combined X-ray absorption spectroscopy analysis and theoretical calculations. The bulk hex-BSCF material synthesized by the facile and scalable sol-gel method achieves 10 mA cm-2 at a low overpotential of only 340 mV (and small Tafel slope of 47 mV dec-1 ) in 0.1 m KOH, surpassing most metal oxides ever reported for OER, while maintaining excellent durability. This study opens up a new avenue to dramatically enhancing catalytic activity of metal oxides for other applications through rational design of structures with multiple active sites.
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Affiliation(s)
- Yinlong Zhu
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China
- Department of Chemical Engineering, Monash University, Clayton, Victoria, 3800, Australia
| | - Hassan A Tahini
- Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, 2601, Australia
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, Dresden, 01187, Germany
| | - Zhi-Gang Chen
- Centre for Future Materials, University of Southern Queensland, Springfield, Queensland, 4300, Australia
- Materials Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia
| | - Wei Zhou
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China
| | - Alexander C Komarek
- Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, Dresden, 01187, Germany
| | - Qian Lin
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China
| | - Hong-Ji Lin
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - Chien-Te Chen
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 30076, Taiwan
| | - Yijun Zhong
- Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia
| | - M T Fernández-Díaz
- Institut Laue-Langevin (ILL), 71 avenue des Martyrs, F-38042, Grenoble, Cedex 9, France
| | - Sean C Smith
- Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, 2601, Australia
| | - Huanting Wang
- Department of Chemical Engineering, Monash University, Clayton, Victoria, 3800, Australia
| | - Meilin Liu
- Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Zongping Shao
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P. R. China
- Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia
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28
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Zhang S, Gu S, Wang Y, Liang C, Yu Y, Han L, Zheng S, Zhang N, Liu X, Zhou J, Li J. Spontaneous Delithiation under Operando Condition Triggers Formation of an Amorphous Active Layer in Spinel Cobalt Oxides Electrocatalyst toward Oxygen Evolution. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00928] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuo Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Songqi Gu
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Yu Wang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Chao Liang
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, P. R. China
| | - Yi Yu
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, P. R. China
| | - Ling Han
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Shun Zheng
- Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Nian Zhang
- Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Xiaosong Liu
- Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Jing Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. China
| | - Jiong Li
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China
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29
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Li L, Lee E, Freeland JW, Fister TT, Thackeray MM, Chan MKY. Identifying the Chemical Origin of Oxygen Redox Activity in Li-Rich Anti-Fluorite Lithium Iron Oxide by Experimental and Theoretical X-ray Absorption Spectroscopy. J Phys Chem Lett 2019; 10:806-812. [PMID: 30615467 DOI: 10.1021/acs.jpclett.8b03271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Harnessing oxygen redox reactions is an intriguing route to increasing capacity in Li-ion batteries (LIBs). Despite numerous experimental and theoretical attempts to unravel the mechanism of oxygen redox behavior, the electronic origin of oxygen activities in energy storage of Li-rich LIB materials remains under intense debate. In this work, the onset of oxygen activity was examined using a Li-rich material that has been reported to exhibit oxygen redox, namely, Li5FeO4. By comparing experimental measurements and first-principles Bethe-Salpeter equation calculations of oxygen K-edge X-ray absorption spectra (XAS), it was found that experimentally-observed changes in XAS originate from the nonbonding oxygen states in cation-disordered delithiated Li5FeO4, and the spectral features of oxygen dimers were also determined. This combined experimental and theoretical study offers an effective approach to disentangle the intertwined signals in XAS and can be further utilized in broader contexts for characterizing other energy storage and conversion materials.
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30
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31
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Thermodynamic Activation of Charge Transfer in Anionic Redox Process for Li-Ion Batteries. STUDIES ON ANIONIC REDOX IN LI-RICH CATHODE MATERIALS OF LI-ION BATTERIES 2019. [DOI: 10.1007/978-981-13-2847-3_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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32
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Wang J, Li L, Li J, Meng L, Xue C, Li G. Stabilizing Co
4+
Ions in Ultrathin Cobalt Oxide Nanosheets for Efficient Oxygen Evolution Reaction. ChemCatChem 2018. [DOI: 10.1002/cctc.201801253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jianghao Wang
- Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of Matter Fuzhou 350002 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry College of ChemistryJilin University Changchun 130012 P. R. China
| | - Jing Li
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry College of ChemistryJilin University Changchun 130012 P. R. China
| | - Lingshen Meng
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry College of ChemistryJilin University Changchun 130012 P. R. China
| | - Chenglin Xue
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry College of ChemistryJilin University Changchun 130012 P. R. China
| | - Guangshe Li
- Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of Matter Fuzhou 350002 P. R. China
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry College of ChemistryJilin University Changchun 130012 P. R. China
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33
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Unified structural motifs of the catalytically active state of Co(oxyhydr)oxides during the electrochemical oxygen evolution reaction. Nat Catal 2018. [DOI: 10.1038/s41929-018-0141-2] [Citation(s) in RCA: 274] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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34
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Wang L, Chen B, Ma J, Cui G, Chen L. Reviving lithium cobalt oxide-based lithium secondary batteries-toward a higher energy density. Chem Soc Rev 2018; 47:6505-6602. [DOI: 10.1039/c8cs00322j] [Citation(s) in RCA: 261] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This review summarizes the key challenges, effective modification strategies and perspectives regarding reviving lithium cobalt oxide-based lithium secondary batteries-toward a higher energy density.
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Affiliation(s)
- Longlong Wang
- Qingdao Industrial Energy Storage Research Institute
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- P. R. China
| | - Bingbing Chen
- Qingdao Industrial Energy Storage Research Institute
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- P. R. China
| | - Jun Ma
- Qingdao Industrial Energy Storage Research Institute
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- P. R. China
| | - Guanglei Cui
- Qingdao Industrial Energy Storage Research Institute
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- P. R. China
| | - Liquan Chen
- Qingdao Industrial Energy Storage Research Institute
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- P. R. China
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35
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Li B, Xia D. Anionic Redox in Rechargeable Lithium Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701054. [PMID: 28660661 DOI: 10.1002/adma.201701054] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/20/2017] [Indexed: 06/07/2023]
Abstract
The extraordinarily high capacities delivered by lithium-rich oxide cathodes, compared with conventional layered oxide electrodes, are a result of contributions from both cationic and anionic redox processes. This phenomenon has invoked a lot of research exploring new kinds of lithium-rich oxides with multiple-electron redox processes. Though proposed many years ago, anionic redox is now regarded to be crucial in further developing high-capacity electrodes. A basic overview of the previous work on anionic redox is given, and issues related to electronic and geometric structures are discussed, including the principles of activation, reversibility, and the energy barrier of anionic redox. Anionic redox also leads to capacity loss and structural degradation, as well as voltage hysteresis, which shows the importance of controlling anionic redox reactions. Finally, the techniques used for characterizing anionic redox processes are reviewed to aid the rational choice of techniques in future studies. Important perspectives are highlighted, which should instruct future work concerning anionic redox processes.
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Affiliation(s)
- Biao Li
- Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Dingguo Xia
- Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University, Beijing, 100871, P. R. China
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36
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Nakamura T, Oike R, Kimura Y, Tamenori Y, Kawada T, Amezawa K. Operando Soft X-ray Absorption Spectroscopic Study on a Solid Oxide Fuel Cell Cathode during Electrochemical Oxygen Reduction. CHEMSUSCHEM 2017; 10:2008-2014. [PMID: 28301085 DOI: 10.1002/cssc.201700237] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/16/2017] [Indexed: 06/06/2023]
Abstract
An operando soft X-ray absorption spectroscopic technique, which enabled the analysis of the electronic structures of the electrode materials at elevated temperature in a controlled atmosphere and electrochemical polarization, was established and its availability was demonstrated by investigating the electronic structural changes of an La2 NiO4+δ dense-film electrode during an electrochemical oxygen reduction reaction. Clear O K-edge and Ni L-edge X-ray absorption spectra could be obtained below 773 K under an atmospheric pressure of 100 ppm O2 /He, 0.1 % O2 /He, and 1 % O2 /He gas mixtures. Considerable spectral changes were observed in the O K-edge X-ray absorption spectra upon changing the PO2 and application of electrical potential, whereas only small spectral changes were observed in Ni L-edge X-ray absorption spectra. A pre-edge peak of the O K-edge X-ray absorption spectra, which reflects the unoccupied partial density of states of Ni 3d-O 2p hybridization, increased or decreased with cathodic or anodic polarization, respectively. The electronic structural changes of the outermost orbital of the electrode material due to electrochemical polarization were successfully confirmed by the operando X-ray absorption spectroscopic technique developed in this study.
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Affiliation(s)
- Takashi Nakamura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Ryo Oike
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Yuta Kimura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Yusuke Tamenori
- Japan Synchrotron Radiation Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Tatsuya Kawada
- Graduate School of Environmental Studies, Tohoku University, 6-6-1 Aramaki-Aoba, Aoba-ku, Sendai, 980-8579, Japan
| | - Koji Amezawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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Simonelli L, Paris E, Iwai C, Miyoshi K, Takeuchi J, Mizokawa T, Saini NL. High resolution x-ray absorption and emission spectroscopy of Li x CoO 2 single crystals as a function delithiation. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:105702. [PMID: 28145896 DOI: 10.1088/1361-648x/aa574d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The effect of delithiation in Li x CoO2 is studied by high resolution Co K-edge x-ray absorption and x-ray emission spectroscopy. Polarization dependence of the x-ray absorption spectra on single crystal samples is exploited to reveal information on the anisotropic electronic structure. We find that the electronic structure of Li x CoO2 is significantly affected by delithiation in which the Co ions oxidation state tending to change from 3+ to 4+. The Co intersite (intrasite) 4p-3d hybridization suffers a decrease (increase) by delithiation. The unoccupied 3d t 2g orbitals with a 1g symmetry, containing substantial O 2p character, hybridize isotropically with Co 4p orbitals and likely to have itinerant character unlike anisotropically hybridized 3d e g orbitals. Such a peculiar electronic structure could have significant effect on the mobility of Li in Li x CoO2 cathode and hence the battery characteristics.
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Affiliation(s)
- L Simonelli
- CELLS-ALBA, Carretera BP 1413, de Cerdanyola del Valles a Sant Cugat del Valles, Km. 3,3 08290 Cerdanyola del Valles, Barcelona, Spain. European Synchrotron Radiation Facility, BP220, F-38043 Grenoble Cedex, France
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NAKAMURA T. Nonstoichiometry and the Origin of Electrochemical Properties of Functional Oxides for Energy Conversion and Storage Technologies. ELECTROCHEMISTRY 2017. [DOI: 10.5796/electrochemistry.85.552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Takashi NAKAMURA
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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Hadt RG, Hayes D, Brodsky CN, Ullman AM, Casa DM, Upton MH, Nocera DG, Chen LX. X-ray Spectroscopic Characterization of Co(IV) and Metal-Metal Interactions in Co4O4: Electronic Structure Contributions to the Formation of High-Valent States Relevant to the Oxygen Evolution Reaction. J Am Chem Soc 2016; 138:11017-30. [PMID: 27515121 DOI: 10.1021/jacs.6b04663] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The formation of high-valent states is a key factor in making highly active transition-metal-based catalysts of the oxygen evolution reaction (OER). These high oxidation states will be strongly influenced by the local geometric and electronic structures of the metal ion, which are difficult to study due to spectroscopically active and complex backgrounds, short lifetimes, and limited concentrations. Here, we use a wide range of complementary X-ray spectroscopies coupled to DFT calculations to study Co(III)4O4 cubanes and their first oxidized derivatives, which provide insight into the high-valent Co(IV) centers responsible for the activity of molecular and heterogeneous OER catalysts. The combination of X-ray absorption and 1s3p resonant inelastic X-ray scattering (Kβ RIXS) allows Co(IV) to be isolated and studied against a spectroscopically active Co(III) background. Co K- and L-edge X-ray absorption data allow for a detailed characterization of the 3d-manifold of effectively localized Co(IV) centers and provide a direct handle on the t2g-based redox-active molecular orbital. Kβ RIXS is also shown to provide a powerful probe of Co(IV), and specific spectral features are sensitive to the degree of oxo-mediated metal-metal coupling across Co4O4. Guided by the data, calculations show that electron-hole delocalization can actually oppose Co(IV) formation. Computational extension of Co4O4 to CoM3O4 structures (M = redox-inactive metal) defines electronic structure contributions to Co(IV) formation. Redox activity is shown to be linearly related to covalency, and M(III) oxo inductive effects on Co(IV) oxo bonding can tune the covalency of high-valent sites over a large range and thereby tune E(0) over hundreds of millivolts. Additionally, redox-inactive metal substitution can also switch the ground state and modify metal-metal and antibonding interactions across the cluster.
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Affiliation(s)
| | | | - Casey N Brodsky
- Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Andrew M Ullman
- Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States
| | | | | | - Daniel G Nocera
- Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Lin X Chen
- Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States
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Tawa EA, Hall SD, Lohoff FW. Overview of the Genetics of Alcohol Use Disorder. Alcohol Alcohol 2016; 51:507-14. [PMID: 27445363 DOI: 10.1093/alcalc/agw046] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 06/23/2016] [Indexed: 01/01/2023] Open
Abstract
AIMS Alcohol Use Disorder (AUD) is a chronic psychiatric illness characterized by harmful drinking patterns leading to negative emotional, physical, and social ramifications. While the underlying pathophysiology of AUD is poorly understood, there is substantial evidence for a genetic component; however, identification of universal genetic risk variants for AUD has been difficult. Recent efforts in the search for AUD susceptibility genes will be reviewed in this article. METHODS In this review, we provide an overview of genetic studies on AUD, including twin studies, linkage studies, candidate gene studies, and genome-wide association studies (GWAS). RESULTS Several potential genetic susceptibility factors for AUD have been identified, but the genes of alcohol metabolism, alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH), have been found to be protective against the development of AUD. GWAS have also identified a heterogeneous list of SNPs associated with AUD and alcohol-related phenotypes, emphasizing the complexity and heterogeneity of the disorder. In addition, many of these findings have small effect sizes when compared to alcohol metabolism genes, and biological relevance is often unknown. CONCLUSIONS Although studies spanning multiple approaches have suggested a genetic basis for AUD, identification of the genetic risk variants has been challenging. Some promising results are emerging from GWAS studies; however, larger sample sizes are needed to improve GWAS results and resolution. As the field of genetics is rapidly developing, whole genome sequencing could soon become the new standard of interrogation of the genes and neurobiological pathways which contribute to the complex phenotype of AUD. SHORT SUMMARY This review examines the genetic underpinnings of Alcohol Use Disorder (AUD), with an emphasis on GWAS approaches for identifying genetic risk variants. The most promising results associated with AUD and alcohol-related phenotypes have included SNPs of the alcohol metabolism genes ADH and ALDH.
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Affiliation(s)
- Elisabeth A Tawa
- Section on Clinical Genomics and Experimental Therapeutics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Samuel D Hall
- Section on Clinical Genomics and Experimental Therapeutics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Falk W Lohoff
- Section on Clinical Genomics and Experimental Therapeutics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
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Nakamura T, Oike R, Ling Y, Tamenori Y, Amezawa K. The determining factor for interstitial oxygen formation in Ruddlesden–Popper type La2NiO4-based oxides. Phys Chem Chem Phys 2016; 18:1564-9. [DOI: 10.1039/c5cp05993c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this paper, we report the electronic structure of the layered perovskite oxides and suggest the determining factor for interstitial oxygen formation.
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Affiliation(s)
- Takashi Nakamura
- Institution of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Japan
| | - Ryo Oike
- Institution of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Japan
| | - Yihan Ling
- Institution of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Japan
| | | | - Koji Amezawa
- Institution of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Japan
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Gu Y, Katsura Y, Yoshino T, Takagi H, Taniguchi K. Rechargeable magnesium-ion battery based on a TiSe2-cathode with d-p orbital hybridized electronic structure. Sci Rep 2015; 5:12486. [PMID: 26228263 PMCID: PMC4521182 DOI: 10.1038/srep12486] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 06/30/2015] [Indexed: 12/21/2022] Open
Abstract
Rechargeable ion-batteries, in which ions such as Li+ carry charges between electrodes, have been contributing to the improvement of power-source performance in a wide variety of mobile electronic devices. Among them, Mg-ion batteries are recently attracting attention due to possible low cost and safety, which are realized by abundant natural resources and stability of Mg in the atmosphere. However, only a few materials have been known to work as rechargeable cathodes for Mg-ion batteries, owing to strong electrostatic interaction between Mg2+ and the host lattice. Here we demonstrate rechargeable performance of Mg-ion batteries at ambient temperature by selecting TiSe2 as a model cathode by focusing on electronic structure. Charge delocalization of electrons in a metal-ligand unit through d-p orbital hybridization is suggested as a possible key factor to realize reversible intercalation of Mg2+ into TiSe2. The viewpoint from the electronic structure proposed in this study might pave a new way to design electrode materials for multivalent-ion batteries.
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Affiliation(s)
- Yunpeng Gu
- Department of Advanced Materials Science. The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8561, Japan
| | - Yukari Katsura
- Department of Applied Physics. The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-8656, Japan
| | - Takafumi Yoshino
- Department of Advanced Materials Science. The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8561, Japan
| | - Hidenori Takagi
- 1] Department of Advanced Materials Science. The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8561, Japan [2] Department of Physics. The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan [3] Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart, D-70569, Germany
| | - Kouji Taniguchi
- 1] Institute for Materials Research. Tohoku University, 2-1-1 Katahira, Sendai, 980-8577, Japan [2] Elements Strategy Initiative for Catalysts and Batteries (ESICB). Kyoto University, Katsura, Kyoto, 615-8520, Japan
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Vertical Interface Induced Dielectric Relaxation in Nanocomposite (BaTiO3)1-x:(Sm2O3)x Thin Films. Sci Rep 2015; 5:11335. [PMID: 26061829 PMCID: PMC4462142 DOI: 10.1038/srep11335] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 05/22/2015] [Indexed: 11/13/2022] Open
Abstract
Vertical interfaces in vertically aligned nanocomposite thin films have been approved to be an effective method to manipulate functionalities. However, several challenges with regard to the understanding on the physical process underlying the manipulation still remain. In this work, because of the ordered interfaces and large interfacial area, heteroepitaxial (BaTiO3)1-x:(Sm2O3)x thin films have been fabricated and used as a model system to investigate the relationship between vertical interfaces and dielectric properties. Due to a relatively large strain generated at the interfaces, vertical interfaces between BaTiO3 and Sm2O3 are revealed to become the sinks to attract oxygen vacancies. The movement of oxygen vacancies is confined at the interfaces and hampered by the misfit dislocations, which contributed to a relaxation behavior in (BaTiO3)1-x:(Sm2O3)x thin films. This work represents an approach to further understand that how interfaces influence on dielectric properties in oxide thin films.
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Suzuki K, Barbiellini B, Orikasa Y, Go N, Sakurai H, Kaprzyk S, Itou M, Yamamoto K, Uchimoto Y, Wang YJ, Hafiz H, Bansil A, Sakurai Y. Extracting the redox orbitals in Li battery materials with high-resolution x-ray compton scattering spectroscopy. PHYSICAL REVIEW LETTERS 2015; 114:087401. [PMID: 25768779 DOI: 10.1103/physrevlett.114.087401] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 06/04/2023]
Abstract
We present an incisive spectroscopic technique for directly probing redox orbitals based on bulk electron momentum density measurements via high-resolution x-ray Compton scattering. Application of our method to spinel Li_{x}Mn_{2}O_{4}, a lithium ion battery cathode material, is discussed. The orbital involved in the lithium insertion and extraction process is shown to mainly be the oxygen 2p orbital. Moreover, the manganese 3d states are shown to experience spatial delocalization involving 0.16±0.05 electrons per Mn site during the battery operation. Our analysis provides a clear understanding of the fundamental redox process involved in the working of a lithium ion battery.
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Affiliation(s)
- K Suzuki
- Faculty of Science and Technology, Gunma University, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - B Barbiellini
- Physics Department, Northeastern University, Boston, Massachusetts 02115, USA
| | - Y Orikasa
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - N Go
- Faculty of Science and Technology, Gunma University, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - H Sakurai
- Faculty of Science and Technology, Gunma University, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - S Kaprzyk
- Physics Department, Northeastern University, Boston, Massachusetts 02115, USA
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, aleja Mickiewicza 30, 30-059 Krakow, Poland
| | - M Itou
- Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Kouto, Sayo, Sayo, Hyogo 679-5198, Japan
| | - K Yamamoto
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Y Uchimoto
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yung Jui Wang
- Physics Department, Northeastern University, Boston, Massachusetts 02115, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H Hafiz
- Physics Department, Northeastern University, Boston, Massachusetts 02115, USA
| | - A Bansil
- Physics Department, Northeastern University, Boston, Massachusetts 02115, USA
| | - Y Sakurai
- Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Kouto, Sayo, Sayo, Hyogo 679-5198, Japan
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Liu X, Yang W, Liu Z. Recent progress on synchrotron-based in-situ soft X-ray spectroscopy for energy materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7710-29. [PMID: 24799004 DOI: 10.1002/adma.201304676] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 01/22/2014] [Indexed: 05/22/2023]
Abstract
Soft X-ray spectroscopy (SXS) techniques such as photoelectron spectroscopy, soft X-ray absorption spectroscopy and X-ray emission spectroscopy are efficient and direct tools to probe electronic structures of materials. Traditionally, these surface sensitive soft X-ray techniques that detect electrons or photons require high vacuum to operate. Many recent in situ instrument developments of these techniques have overcome this vacuum barrier. One can now study many materials and model devices under near ambient, semi-realistic, and operando conditions. Further developments of integrating the realistic sample environments with efficient and high resolution detection methods, particularly at the high brightness synchrotron light sources, are making SXS an important tool for the energy research community. In this progress report, we briefly describe the basic concept of several SXS techniques and discuss recent development of SXS instruments. We then present several recent studies, mostly in situ SXS experiments, on energy materials and devices. Using these studies, we would like to highlight that the integration of SXS and in situ environments can provide in-depth insight of material's functionality and help researchers in new energy material developments. The remaining challenges and critical research directions are discussed at the end.
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Affiliation(s)
- Xiaosong Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China; Advanced Light Source Division, Lawrence Berkley National Laboratory, Berkeley, CA, 94720, USA
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Li W, Zhao R, Tang R, Chen A, Zhang W, Lu X, Wang H, Yang H. Vertical-interface-manipulated conduction behavior in nanocomposite oxide thin films. ACS APPLIED MATERIALS & INTERFACES 2014; 6:5356-5361. [PMID: 24689868 DOI: 10.1021/am5001129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Vertically aligned nanocomposites with vertical interfaces are a novel concept that show powerful advantages over conventional nanocomposites with lateral interfaces. However, significant obstacles to a systematic understanding of vertical interfaces still remain. Here, heteroepitaxial (BaTiO3)0.5:(Sm2O3)0.5 nanocomposite thin films have been fabricated and the conduction behaviors have been investigated. A spontaneous phase ordering with clear vertical interfaces has been found in the composite films. Because of the structural discontinuity as well as a large strain generated at the interfaces, the vertical interfaces are revealed to become the sinks to attract oxygen vacancies. The accumulated oxygen vacancies contributed to a largely reduced leakage current and a different leakage mechanism in the composite films compared to that of the pure BaTiO3 film. The present work represents a methodology to manipulate functionalities by designing configuration of the interfaces in oxide thin films.
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Affiliation(s)
- Weiwei Li
- School of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
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