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Kim S, Kim M, Ku M, Park J, Lee J, Kim YB. Coating Robust Layers on Ni-Rich Cathode Active Materials while Suppressing Cation Mixing for All-Solid-State Lithium-Ion Batteries. ACS NANO 2024; 18:25096-25106. [PMID: 39189389 DOI: 10.1021/acsnano.4c06720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
This study focused on addressing the challenges associated with the incompatibility between sulfide solid electrolytes and Ni-rich cathode active materials (CAMs) in all-solid-state lithium-ion batteries. To resolve these issues, protective layers have been explored for Ni-rich materials. Lithium lanthanum titanate (LLTO), a perovskite-type material, is recognized for its excellent chemical stability and ionic conductivity, which render it a potential protective layer in CAMs. However, traditional methods of achieving the perovskite structure involve temperatures exceeding 700 °C, resulting in challenges such as LLTO agglomeration, secondary phase formation between LLTO and CAM, and cation mixing within the CAM. In this study, a rapid technique known as flash-light sintering (FLS) was employed to fabricate a uniform and pure perovskite protective layer without inducing cation mixing within the CAM. The LLTO-coated LiNi0.8Co0.1Mn0.1O2 (NCM811) with FLS treatment demonstrated minimal cation mixing and formed a fully covered dense layer. This resulted in a high initial capacity and effectively addressed the incompatibility issues between the sulfide electrolytes and CAM. The rapid FLS method not only streamlines the fabrication of LLTO-coated NCM811 but also provides opportunities for its broader application to materials that were previously deemed impractical because of high sintering temperatures.
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Affiliation(s)
- Sunmin Kim
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Minji Kim
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Miju Ku
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Junghum Park
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Jonghyuk Lee
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Young-Beom Kim
- Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
- Department of Battery Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
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Seo J, Im J, Kim M, Song D, Yoon S, Cho KY. Recent Progress of Advanced Functional Separators in Lithium Metal Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2312132. [PMID: 38453671 DOI: 10.1002/smll.202312132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/26/2024] [Indexed: 03/09/2024]
Abstract
As a representative in the post-lithium-ion batteries (LIBs) landscape, lithium metal batteries (LMBs) exhibit high-energy densities but suffer from low coulombic efficiencies and short cycling lifetimes due to dendrite formation and complex side reactions. Separator modification holds the most promise in overcoming these challenges because it utilizes the original elements of LMBs. In this review, separators designed to address critical issues in LMBs that are fatal to their destiny according to the target electrodes are focused on. On the lithium anode side, functional separators reduce dendrite propagation with a conductive lithiophilic layer and a uniform Li-ion channel or form a stable solid electrolyte interphase layer through the continuous release of active agents. The classification of functional separators solving the degradation stemming from the cathodes, which has often been overlooked, is summarized. Structural deterioration and the resulting leakage from cathode materials are suppressed by acidic impurity scavenging, transition metal ion capture, and polysulfide shuttle effect inhibition from functional separators. Furthermore, flame-retardant separators for preventing LMB safety issues and multifunctional separators are discussed. Further expansion of functional separators can be effectively utilized in other types of batteries, indicating that intensive and extensive research on functional separators is expected to continue in LIBs.
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Affiliation(s)
- Junhyeok Seo
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Juyeon Im
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Minjae Kim
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Dahee Song
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Sukeun Yoon
- Division of Advanced Materials Engineering, Kongju National University, Cheonan, Chungnam, 31080, Republic of Korea
| | - Kuk Young Cho
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
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Wi TU, Park C, Ko S, Kim T, Choi A, Muralidharan V, Choi M, Lee HW. Cathode Electrolyte Interphase Engineering for Prussian Blue Analogues in Lithium-Ion Batteries. NANO LETTERS 2024; 24:7783-7791. [PMID: 38869099 PMCID: PMC11216687 DOI: 10.1021/acs.nanolett.4c01971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 05/31/2024] [Accepted: 06/11/2024] [Indexed: 06/14/2024]
Abstract
The increasing use of low-cost lithium iron phosphate cathodes in low-end electric vehicles has sparked interest in Prussian blue analogues (PBAs) for lithium-ion batteries. A major challenge with iron hexacyanoferrate (FeHCFe), particularly in lithium-ion systems, is its slow kinetics in organic electrolytes and valence state inactivation in aqueous ones. We have addressed these issues by developing a polymeric cathode electrolyte interphase (CEI) layer through a ring-opening reaction of ethylene carbonate triggered by OH- radicals from structural water. This facile approach considerably mitigates the sluggish electrochemical kinetics typically observed in organic electrolytes. As a result, FeHCFe has achieved a specific capacity of 125 mAh g-1 with a stable lifetime over 500 cycles, thanks to the effective activation of Fe low-spin states and the structural integrity of the CEI layers. These advancements shed light on the potential of PBAs to be viable, durable, and efficient cathode materials for commercial use.
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Affiliation(s)
- Tae-Ung Wi
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department
of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Changhyun Park
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Sangho Ko
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Taewon Kim
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Ahreum Choi
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Vithiya Muralidharan
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Myeongjun Choi
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Hyun-Wook Lee
- School
of Energy and Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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Stevenson M, Weiß S, Cha G, Schamel M, Jahn L, Friedrich D, Danzer MA, Cheong JY, Breu J. Osmotically Delaminated Silicate Nanosheet-Coated NCM for Ultra-Stable Li + Storage and Chemical Stability Toward Long-Term Air Exposure. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302617. [PMID: 37264519 DOI: 10.1002/smll.202302617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/11/2023] [Indexed: 06/03/2023]
Abstract
To ensure the safety and performance of lithium-ion batteries (LIBs), a rational design and optimization of suitable cathode materials are crucial. Lithium nickel cobalt manganese oxides (NCM) represent one of the most popular cathode materials for commercial LIBs. However, they are limited by several critical issues, such as transition metal dissolution, formation of an unstable cathode-electrolyte interphase (CEI) layer, chemical instability upon air exposure, and mechanical instability. In this work, coating fabricated by self-assembly of osmotically delaminated sodium fluorohectorite (Hec) nanosheets onto NCM (Hec-NCM) in a simple and technically benign aqueous wet-coating process is reported first. Complete wrapping of NCM by high aspect ratio (>10 000) nanosheets is enabled through an electrostatic attraction between Hec nanosheets and NCM as well as by the superior mechanical flexibility of Hec nanosheets. The coating significantly suppresses mechanical degradation while forming a multi-functional CEI layer. Consequently, Hec-NCM delivers outstanding capacity retention for 300 cycles. Furthermore, due to the exceptional gas barrier properties of the few-layer Hec-coating, the electrochemical performance of Hec-NCM is maintained even after 6 months of exposure to the ambient atmosphere. These findings suggest a new direction of significantly improving the long-term stability and activity of cathode materials by creating an artificial CEI layer.
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Affiliation(s)
- Max Stevenson
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Sebastian Weiß
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Gihoon Cha
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Maximilian Schamel
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Chair of Electrical Energy Systems, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Leonard Jahn
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Chair of Electrical Energy Systems, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Daniel Friedrich
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Michael A Danzer
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Chair of Electrical Energy Systems, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Jun Young Cheong
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
| | - Josef Breu
- Bavarian Center for Battery Technology (BayBatt), University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany
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Han X, Xiang Q, Zhou C, Huang J, Sun J. Self-Purifying Primary Solvation Sheath Enables Stable Electrode-Electrolyte Interfaces for Nickel-Rich Cathodes. NANO LETTERS 2023; 23:7404-7410. [PMID: 37552565 DOI: 10.1021/acs.nanolett.3c01679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Herein, we optimize the primary solvation sheath to investigate the fundamental correlation between battery performance and electrode-electrolyte interfacial properties through electrolyte solvation chemistry. Experimental and theoretical analyses reveal that the primary solvation sheath with a self-purifying feature can "positively" scavenge both the HF and PF5 (hydrolysis of ion-paired LiPF6), stabilize the PF6 anion-derived electrode-electrolyte interfaces, and thus boost the cycling performances. Being attributed with these superiorities, the NCM811//Li Li metal battery (LMB) with the electrolyte containing the optimized solvation sheath delivers 99.9% capacity retention at 2.5 C after 250 cycles. To circumvent the impact of excess Li content of Li metal on the performance of NCM811 cathode, the as-fabricated NCM811//graphite Li ion battery (LIB) also delivers a high-capacity retention of 90.1% from the 5th to the 100th cycle at 1 C. This work sheds light on the strong ability of the primary solvation sheath to regulate cathode interfacial properties.
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Affiliation(s)
- Xinpeng Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Qianxin Xiang
- Guizhou Zhenhua E-Chem Company, Ltd., Guizhou 550014, China
| | - Chaoyi Zhou
- Guizhou Zhenhua E-Chem Company, Ltd., Guizhou 550014, China
| | - Jin Huang
- Guizhou Zhenhua E-Chem Company, Ltd., Guizhou 550014, China
| | - Jie Sun
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Quzhou Institute for Innovation in Resource Chemical Engineering, No. 78, Jiuhuabei Avenue, Quzhou City, Zhejiang Province 324000, China
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Liu Z, Dong X, Wen J, Hu P, Shang C. The Inducement and "Rejuvenation" of Li Dendrites by Space Confinement and Positive Fe/Co-Sites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300106. [PMID: 36890782 DOI: 10.1002/smll.202300106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/20/2023] [Indexed: 06/08/2023]
Abstract
The high reactivity of Li metal and the inhomogeneous Li deposition leads to the formation of Li dendrites and "dead" Li, which impedes the performance of Li metal batteries (LMBs) with high energy density. The regulating and guiding the Li dendrite nucleation is a desirable tactic to realize concentrated distribution of Li dendrites instead of completely inhibiting dendrite formation. Here, a Fe-Co-based Prussian blue analog with hollow and open framework (H-PBA) is employed to modify the commercial polypropylene separator (PP@H-PBA). This functional PP@H-PBA can guide the lithium dendrite growth to form uniform lithium deposition and activate the inactive Li. In details, the H-PBA with macroporous structure and open framework can induce the growth of lithium dendrites via space confinement, while the positive Fe/Co-sites lowered by polar cyanide (-CN) of PBA can reactivate the inactive Li. Thus, the Li|PP@H-PBA|Li symmetric cells exhibit long-term stability at 1 mA cm-2 for 1 mAh cm-2 over 500 h. And the Li-S batteries with PP@H-PBA deliver favorable cycling performance at 500 mA g-1 for 200 cycles.
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Affiliation(s)
- Ziqin Liu
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Xin Dong
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Jing Wen
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Pu Hu
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Chaoqun Shang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
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