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Marshenya SN, Dembitskiy AD, Fedorov DS, Scherbakov AG, Trussov IA, Emelianova O, Aksyonov DA, Buzlukov AL, Zhuravlev NA, Denisova TA, Medvedeva NI, Abakumov AM, Antipov EV, Fedotov SS. NaGaPO 4F - a KTiOPO 4-structured solid sodium-ion conductor. Dalton Trans 2023; 52:17426-17437. [PMID: 37947446 DOI: 10.1039/d3dt03107a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Advanced ionic conductors are crucial for a large variety of contemporary technologies spanning solid state ion batteries, fuel cells, gas sensors, water desalination, etc. In this work, we report on a new member of KTiOPO4-structured materials, NaGaPO4F, with sodium-ion conductivity. NaGaPO4F has been obtained for the first time via a facile two-step synthesis consisting of a hydrothermal preparation of an ammonia-based precursor, NH4GaPO4F, followed by an ion exchange reaction with NaNO3. Its crystal structure was precisely refined using a combination of synchrotron X-ray powder diffraction and electron diffraction tomography. The material is thermally stable upon 450 °C showing no significant structural transformations or degradation but only a ∼1% cell volume expansion. Na-ion mobility in NaGaPO4F was investigated by a joint experimental and computational approach comprising solid-state nuclear magnetic resonance (NMR) and density functional theory (DFT). DFT and bond-valence site energy (BVSE) calculations reveal 3D diffusion of sodium in the [GaPO4F] framework with migration barriers amounting to 0.22 and 0.44 eV, respectively, while NMR yields 0.3-0.5 eV that, being coupled with a calculated bandgap of ∼4.25 eV, makes NaGaPO4F a promising fast Na-ion conductor.
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Affiliation(s)
- Sergey N Marshenya
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Artem D Dembitskiy
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Dmitry S Fedorov
- Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Science, 91 Pervomaiskaya Street, 620990 Ekaterinburg, Russia
- M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Science, 18 S. Kovalevskaya Street, 620137 Ekaterinburg, Russia
| | - Alexey G Scherbakov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Ivan A Trussov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Olga Emelianova
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Dmitry A Aksyonov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Anton L Buzlukov
- M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Science, 18 S. Kovalevskaya Street, 620137 Ekaterinburg, Russia
| | - Nikolai A Zhuravlev
- Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Science, 91 Pervomaiskaya Street, 620990 Ekaterinburg, Russia
| | - Tatiana A Denisova
- Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Science, 91 Pervomaiskaya Street, 620990 Ekaterinburg, Russia
| | - Nadezhda I Medvedeva
- Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Science, 91 Pervomaiskaya Street, 620990 Ekaterinburg, Russia
| | - Artem M Abakumov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
| | - Evgeny V Antipov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Stanislav S Fedotov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 3 Nobel Street, 121205 Moscow, Russia.
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Morozov AV, Paik H, Boev AO, Aksyonov DA, Lipovskikh SA, Stevenson KJ, Rupp JLM, Abakumov AM. Thermodynamics as a Driving Factor of LiCoO 2 Grain Growth on Nanocrystalline Ta-LLZO Thin Films for All-Solid-State Batteries. ACS Appl Mater Interfaces 2022; 14:39907-39916. [PMID: 36007961 DOI: 10.1021/acsami.2c07176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
All-solid-state batteries primarily focus on macrocrystalline solid electrolyte/cathode interfaces, and little is explored on the growth and stability of nanograined Li-garnet and cathode ones. In this work, a thin (∼500 nm) film of LiCoO2 (LCO) has been grown on top of the polycrystalline layer of Ta-doped Li7La3Zr2O12 (Ta-LLZO) solid electrolyte using the pulsed laser deposition (PLD) technique. Scanning transmission electron microscopy, electron diffraction, and electron tomography demonstrated that the LCO film is formed by columnar elements with the shape of inverted cones. The film appears to be highly textured, with the (003) LCO crystal planes parallel to the LCO/Ta-LLZO interface and with internal pores shaped by the {104} and {102} planes. According to density functional theory (DFT) calculations, this specific microstructure is governed by a competition between free energies of the corresponding crystal planes, which in turn depends on the oxygen and lithium chemical potentials during the deposition, indicating that thermodynamics plays an important role in the resulting LCO microstructure even under nonequilibrium PLD conditions. Based on the thermodynamic estimates, the experimental conditions within the LCO stability domain are proposed for the preferential {104} LCO orientation, which is considered favorable for enhanced Li diffusion in the positive electrode layers of all-solid-state batteries.
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Affiliation(s)
- Anatolii V Morozov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Haemin Paik
- Department of Material Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Anton O Boev
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Dmitry A Aksyonov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Svetlana A Lipovskikh
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Keith J Stevenson
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Jennifer L M Rupp
- Department of Material Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Artem M Abakumov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
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Savina AA, Saiutina VV, Morozov AV, Boev AO, Aksyonov DA, Dejoie C, Batuk M, Bals S, Hadermann J, Abakumov AM. Chemistry, Local Molybdenum Clustering, and Electrochemistry in the Li 2+xMo 1-xO 3 Solid Solutions. Inorg Chem 2022; 61:5637-5652. [PMID: 35360905 DOI: 10.1021/acs.inorgchem.2c00420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A broad range of cationic nonstoichiometry has been demonstrated for the Li-rich layered rock-salt-type oxide Li2MoO3, which has generally been considered as a phase with a well-defined chemical composition. Li2+xMo1-xO3 (-0.037 ≤ x ≤ 0.124) solid solutions were synthesized via hydrogen reduction of Li2MoO4 in the temperature range of 650-1100 °C, with x decreasing with the increase of the reduction temperature. The solid solutions adopt a monoclinically distorted O3-type layered average structure and demonstrate a robust local ordering of the Li cations and Mo3 triangular clusters within the mixed Li/Mo cationic layers. The local structure was scrutinized in detail by electron diffraction and aberration-corrected scanning transmission electron microcopy (STEM), resulting in an ordering model comprising a uniform distribution of the Mo3 clusters compatible with local electroneutrality and chemical composition. The geometry of the triangular clusters with their oxygen environment (Mo3O13 groups) has been directly visualized using differential phase contrast STEM imaging. The established local structure was used as input for density functional theory (DFT)-based calculations; they support the proposed atomic arrangement and provide a plausible explanation for the staircase galvanostatic charge profiles upon electrochemical Li+ extraction from Li2+xMo1-xO3 in Li cells. According to DFT, all electrochemical capacity in Li2+xMo1-xO3 solely originates from the cationic Mo redox process, which proceeds via oxidation of the Mo3 triangular clusters into bent Mo3 chains where the electronic capacity of the clusters depends on the initial chemical composition and Mo oxidation state defining the width of the first charge low-voltage plateau. Further oxidation at the high-voltage plateau proceeds through decomposition of the Mo3 chains into Mo2 dimers and further into individual Mo6+ cations.
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Affiliation(s)
- Aleksandra A Savina
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Viktoriia V Saiutina
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Anatolii V Morozov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Anton O Boev
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Dmitry A Aksyonov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Catherine Dejoie
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Maria Batuk
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Sara Bals
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Joke Hadermann
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Artem M Abakumov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
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Kapaev RR, Zhugayevych A, Ryazantsev SV, Aksyonov DA, Novichkov D, Matveev PI, Stevenson KJ. Charge storage mechanisms of a π–d conjugated polymer for advanced alkali-ion battery anodes. Chem Sci 2022; 13:8161-8170. [PMID: 35919425 PMCID: PMC9278342 DOI: 10.1039/d2sc03127b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 06/15/2022] [Indexed: 11/21/2022] Open
Abstract
Charge storage mechanisms of NiBTA, a 1D π–d conjugated polymer derived from benzenetetramine, are studied in Li-, Na- and K-based batteries with a set of advanced experimental and computational methods.
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Affiliation(s)
- Roman R. Kapaev
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30 bld. 1, Moscow, 121205, Russia
| | - Andriy Zhugayevych
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30 bld. 1, Moscow, 121205, Russia
- Polymer Theory Department, Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany
| | - Sergey V. Ryazantsev
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30 bld. 1, Moscow, 121205, Russia
| | - Dmitry A. Aksyonov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30 bld. 1, Moscow, 121205, Russia
| | - Daniil Novichkov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Petr I. Matveev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Keith J. Stevenson
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30 bld. 1, Moscow, 121205, Russia
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5
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Drozhzhin OA, Grigoryev VV, Alekseeva AM, Samigullin RR, Aksyonov DA, Boytsova OV, Chernyshov D, Shapovalov VV, Guda AA, Soldatov AV, Stevenson KJ, Abakumov AM, Antipov EV. Revisited Ti 2Nb 2O 9 as an Anode Material for Advanced Li-Ion Batteries. ACS Appl Mater Interfaces 2021; 13:56366-56374. [PMID: 34784712 DOI: 10.1021/acsami.1c20842] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ti2Nb2O9 with a tunnel-type structure is considered as a perspective negative electrode material for Li-ion batteries (LIBs) with theoretical capacity of 252 mAh g-1 corresponding to one-electron reduction/oxidation of Ti and Nb, but only ≈160 mAh g-1 has been observed practically. In this work, highly reversible capacity of 200 mAh g-1 with the average (de)lithiation potential of 1.5 V vs Li/Li+ is achieved for Ti2Nb2O9 with pseudo-2D layered morphology obtained via thermal decomposition of the NH4TiNbO5 intermediate prepared by K+→ H+→ NH4+ cation exchange from KTiNbO5. Using operando synchrotron powder X-ray diffraction (SXPD), single-phase (de)lithiation mechanism with 4.8% unit cell volume change is observed. Operando X-ray absorption near-edge structure (XANES) experiment revealed simultaneous Ti4+/Ti3+ and Nb5+/Nb4+ reduction/oxidation within the whole voltage range. Li+ migration barriers for Ti2Nb2O9 along [010] direction derived from density functional theory (DFT) calculations are within the 0.15-0.4 eV range depending on the Li content that is reflected in excellent C-rate capacity retention. Ti2Nb2O9 synthesized via the ion-exchange route appears as a strong contender to widely commercialized Ti-based negative electrode material Li4Ti5O12 in the next generation of high-performance LIBs.
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Affiliation(s)
- Oleg A Drozhzhin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Str. 3, 143026 Moscow, Russian Federation
| | - Vladislav V Grigoryev
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Anastasia M Alekseeva
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Ruslan R Samigullin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Dmitry A Aksyonov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Str. 3, 143026 Moscow, Russian Federation
| | - Olga V Boytsova
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
- Kurnakov Institute of General and Inorganic Chemistry RAS, Moscow, 119071, Russia
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines, European Synchrotron, 71 Rue des Martyrs, Grenoble, 38043, France
- Peter the Great St. Petersburg Polytechnic University, 29 Polytekhnicheskaya St, Saint-Petersburg, 195251, Russia
| | - Victor V Shapovalov
- The Smart Materials Research Institute, Southern Federal University, 178/24 A. Sladkova street, Rostov-on-Don, 344090, Russia
| | - Alexander A Guda
- The Smart Materials Research Institute, Southern Federal University, 178/24 A. Sladkova street, Rostov-on-Don, 344090, Russia
| | - Alexander V Soldatov
- The Smart Materials Research Institute, Southern Federal University, 178/24 A. Sladkova street, Rostov-on-Don, 344090, Russia
| | - Keith J Stevenson
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Str. 3, 143026 Moscow, Russian Federation
| | - Artem M Abakumov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Str. 3, 143026 Moscow, Russian Federation
| | - Evgeny V Antipov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Str. 3, 143026 Moscow, Russian Federation
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6
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Luchinin ND, Aksyonov DA, Morozov AV, Ryazantsev SV, Nikitina VA, Abakumov AM, Antipov EV, Fedotov SS. α-TiPO 4 as a Negative Electrode Material for Lithium-Ion Batteries. Inorg Chem 2021; 60:12237-12246. [PMID: 34351137 DOI: 10.1021/acs.inorgchem.1c01420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To realize high-power performance, lithium-ion batteries require stable, environmentally benign, and economically viable noncarbonaceous anode materials capable of operating at high rates with low strain during charge-discharge. In this paper, we report the synthesis, crystal structure, and electrochemical properties of a new titanium-based member of the MPO4 phosphate series adopting the α-CrPO4 structure type. α-TiPO4 has been obtained by thermal decomposition of a novel hydrothermally prepared fluoride phosphate, NH4TiPO4F, at 600 °C under a hydrogen atmosphere. The crystal structure of α-TiPO4 is refined from powder X-ray diffraction data using a Rietveld method and verified by electron diffraction and high-resolution scanning transmission electron microscopy, whereas the chemical composition is confirmed by IR, energy-dispersive X-ray, electron paramagnetic resonance, and electron energy loss spectroscopies. Carbon-coated α-TiPO4/C demonstrates reversible electrochemical activity ascribed to the Ti3+/Ti2+ redox transition delivering 125 mAh g-1 specific capacity at C/10 in the 1.0-3.1 V versus Li+/Li potential range with an average potential of ∼1.5 V, exhibiting good rate capability and stable cycling with volume variation not exceeding 0.5%. Below 0.8 V, the material undergoes a conversion reaction, further revealing capacitive reversible electrochemical behavior with an average specific capacity of 270 mAh g-1 at 1C in the 0.7-2.9 V versus Li+/Li potential range. This work suggests a new synthesis route to metastable titanium-containing phosphates holding prospective to be used as negative electrode materials for metal-ion batteries.
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Affiliation(s)
- Nikita D Luchinin
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
| | - Dmitry A Aksyonov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
| | - Anatoly V Morozov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
| | - Sergey V Ryazantsev
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation.,Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Victoria A Nikitina
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
| | - Artem M Abakumov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
| | - Evgeny V Antipov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation.,Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Stanislav S Fedotov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 121205, Russian Federation
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Porokhin SV, Nikitina VA, Aksyonov DA, Filimonov DS, Pazhetnov EM, Mikheev IV, Abakumov AM. Mixed-Cation Perovskite La 0.6Ca 0.4Fe 0.7Ni 0.3O 2.9 as a Stable and Efficient Catalyst for the Oxygen Evolution Reaction. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00796] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sergei V. Porokhin
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russia
| | - Victoria A. Nikitina
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russia
| | - Dmitry A. Aksyonov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russia
| | - Dmitry S. Filimonov
- Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Egor M. Pazhetnov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russia
| | - Ivan V. Mikheev
- Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Artem M. Abakumov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russia
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8
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Aksyonov DA, Varlamova I, Trussov IA, Savina AA, Senyshyn A, Stevenson KJ, Abakumov AM, Zhugayevych A, Fedotov SS. Hydroxyl Defects in LiFePO 4 Cathode Material: DFT+ U and an Experimental Study. Inorg Chem 2021; 60:5497-5506. [PMID: 33829762 DOI: 10.1021/acs.inorgchem.0c03241] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Lithium iron phosphate, LiFePO4, a widely used cathode material in commercial Li-ion batteries, unveils a complex defect structure, which is still being deciphered. Using a combined computational and experimental approach comprising density functional theory (DFT)+U and molecular dynamics calculations and X-ray and neutron diffraction, we provide a comprehensive characterization of various OH point defects in LiFePO4, including their formation, dynamics, and localization in the interstitial space and at Li, Fe, and P sites. It is demonstrated that one, two, and four (five) OH groups can effectively stabilize Li, Fe, and P vacancies, respectively. The presence of D (H) at both Li and P sites for hydrothermally synthesized deuterium-enriched LiFePO4 is confirmed by joint X-ray and neutron powder diffraction structure refinement at 5 K that also reveals a strong deficiency of P of 6%. The P occupancy decrease is explained by the formation of hydrogarnet-like P/4H and P/5H defects, which have the lowest formation energies among all considered OH defects. Molecular dynamics simulation shows a rich structural diversity of these defects, with OH groups pointing both inside and outside vacant P tetrahedra creating numerous energetically close conformers, which hinders their explicit localization with diffraction-based methods solely. The discovered conformers include structural water molecules, which are only by 0.04 eV/atom H higher in energy than separate OH defects.
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Affiliation(s)
- Dmitry A Aksyonov
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Irina Varlamova
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Ivan A Trussov
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Aleksandra A Savina
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Anatoliy Senyshyn
- Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Keith J Stevenson
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Artem M Abakumov
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Andriy Zhugayevych
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
| | - Stanislav S Fedotov
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation
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9
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Kirsanova MA, Akmaev AS, Aksyonov DA, Ryazantsev SV, Nikitina VA, Filimonov DS, Avdeev M, Abakumov AM. Monoclinic α-Na 2FePO 4F with Strong Antisite Disorder and Enhanced Na + Diffusion. Inorg Chem 2020; 59:16225-16237. [PMID: 33137251 DOI: 10.1021/acs.inorgchem.0c01961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new monoclinic α-polymorph of the Na2FePO4F fluoride-phosphate has been directly synthesized via a hydrothermal method for application in metal-ion batteries. The crystal structure of the as-prepared α-Na2FePO4F studied with powder X-ray and neutron diffraction (P21/c, a = 13.6753(10) Å, b = 5.2503(2) Å, c = 13.7202(8) Å, β = 120.230(4)°) demonstrates strong antisite disorder between the Na and Fe atoms. As revealed with DFT-based calculations, α-Na2FePO4F has low migration barriers for Na+ along the main pathway parallel to the b axis, and an additional diffusion bypass allowing the Na+ cations to go around the Na/Fe antisite defects. These results corroborate with the extremely high experimental Na-ion diffusion coefficient of (1-5)·10-11 cm2·s-1, which is 2 orders of magnitude higher than that for the orthorhombic β-polymorph ((5-10)·10-13 cm2·s-1). Being tested as a cathode material in Na- and Li-ion battery cells, monoclinic α-Na2FePO4F exhibits a reversible specific capacity of 90 and 80 mAh g-1, respectively.
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Affiliation(s)
- Maria A Kirsanova
- Advanced Imaging Core Facility, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
| | - Alexey S Akmaev
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
| | - Dmitry A Aksyonov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
| | - Sergey V Ryazantsev
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
| | - Victoria A Nikitina
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
| | - Dmitry S Filimonov
- Department of Chemistry, Moscow State University, 1 Leninskiye Gory, 119991 Moscow, Russia
| | - Maxim Avdeev
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Artem M Abakumov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
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Fedotov SS, Luchinin ND, Aksyonov DA, Morozov AV, Ryazantsev SV, Gaboardi M, Plaisier JR, Stevenson KJ, Abakumov AM, Antipov EV. Titanium-based potassium-ion battery positive electrode with extraordinarily high redox potential. Nat Commun 2020; 11:1484. [PMID: 32198379 PMCID: PMC7083823 DOI: 10.1038/s41467-020-15244-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 02/27/2020] [Indexed: 11/09/2022] Open
Abstract
The rapid progress in mass-market applications of metal-ion batteries intensifies the development of economically feasible electrode materials based on earth-abundant elements. Here, we report on a record-breaking titanium-based positive electrode material, KTiPO4F, exhibiting a superior electrode potential of 3.6 V in a potassium-ion cell, which is extraordinarily high for titanium redox transitions. We hypothesize that such an unexpectedly major boost of the electrode potential benefits from the synergy of the cumulative inductive effect of two anions and charge/vacancy ordering. Carbon-coated electrode materials display no capacity fading when cycled at 5C rate for 100 cycles, which coupled with extremely low energy barriers for potassium-ion migration of 0.2 eV anticipates high-power applications. Our contribution shows that the titanium redox activity traditionally considered as "reducing" can be upshifted to near-4V electrode potentials thus providing a playground to design sustainable and cost-effective titanium-containing positive electrode materials with promising electrochemical characteristics.
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Affiliation(s)
- Stanislav S Fedotov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation.
| | - Nikita D Luchinin
- Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russian Federation
| | - Dmitry A Aksyonov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
| | - Anatoly V Morozov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
| | - Sergey V Ryazantsev
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
- Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russian Federation
| | - Mattia Gaboardi
- Elettra Sincrotrone Trieste S.C.p.A, Area Science Park, 34012, Basovizza, Italy
| | - Jasper R Plaisier
- Elettra Sincrotrone Trieste S.C.p.A, Area Science Park, 34012, Basovizza, Italy
| | - Keith J Stevenson
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
| | - Artem M Abakumov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
| | - Evgeny V Antipov
- Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205, Moscow, Russian Federation
- Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russian Federation
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11
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Fedotov SS, Aksyonov DA, Samarin AS, Karakulina OM, Hadermann J, Stevenson KJ, Khasanova NR, Abakumov AM, Antipov EV. Tuning the Crystal Structure of A2
CoPO4
F (A = Li, Na) Fluoride-Phosphates: A New Layered Polymorph of LiNaCoPO4
F. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900660] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Stanislav S. Fedotov
- Skoltech Center for Energy Science and Technology; Skolkovo Institute of Science and Technology; 121205 Moscow Russian Federation
| | - Dmitry A. Aksyonov
- Skoltech Center for Energy Science and Technology; Skolkovo Institute of Science and Technology; 121205 Moscow Russian Federation
| | - Aleksandr Sh. Samarin
- Department of Chemistry; Lomonosov Moscow State University; 119991 Moscow Russian Federation
| | | | - Joke Hadermann
- EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Keith J. Stevenson
- Skoltech Center for Energy Science and Technology; Skolkovo Institute of Science and Technology; 121205 Moscow Russian Federation
| | - Nellie R. Khasanova
- Department of Chemistry; Lomonosov Moscow State University; 119991 Moscow Russian Federation
| | - Artem M. Abakumov
- Skoltech Center for Energy Science and Technology; Skolkovo Institute of Science and Technology; 121205 Moscow Russian Federation
| | - Evgeny V. Antipov
- Skoltech Center for Energy Science and Technology; Skolkovo Institute of Science and Technology; 121205 Moscow Russian Federation
- Department of Chemistry; Lomonosov Moscow State University; 119991 Moscow Russian Federation
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12
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Kirsanova MA, Aksyonov DA, Maximova OV, Shvanskaya LV, Vasiliev AN, Tsirlin AA, Abakumov AM. Crystal Structures and Low-Dimensional Ferromagnetism of Sodium Nickel Phosphates Na 5Ni 2(PO 4) 3·H 2O and Na 6Ni 2(PO 4) 3OH. Inorg Chem 2019; 58:610-621. [PMID: 30565920 DOI: 10.1021/acs.inorgchem.8b02791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two new sodium nickel phosphates, Na5Ni2(PO4)3·H2O (I) and Na6Ni2(PO4)3OH (II), have been synthesized hydrothermally and characterized by synchrotron X-ray diffraction, electron diffraction, low-temperature thermodynamic and magnetic measurements, and ab initio calculations. Unlike the majority of Ni2+ compounds, I and II show predominant ferromagnetic exchange couplings. I crystallizes in the monoclinic space group P21/ n ( a = 14.0395(4) Å, b = 5.1847(14) Å, c = 16.4739(4) Å, β = 110.4186(14)°) and features chains of ferromagnetically coupled Ni2+ ions. In II with the orthorhombic space group Pcmb ( a = 7.5007(15) Å, b = 21.4661(4) Å, c = 7.1732(15) Å), the ferromagnetically coupled Ni2+ ions form dimers arranged on a spin ladder. Both compounds represent rare examples of quasi-one-dimensional ferromagnets. Structural features behind this unusual magnetic behavior are discussed.
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Affiliation(s)
- Maria A Kirsanova
- Skolkovo Institute of Science and Technology , Moscow 143026 , Russia
| | - Dmitry A Aksyonov
- Skolkovo Institute of Science and Technology , Moscow 143026 , Russia
| | - Olga V Maximova
- Lomonosov Moscow State University , Moscow 119991 , Russia.,National University of Science and Technology "MISiS" , Moscow 119049 , Russia
| | - Larisa V Shvanskaya
- Lomonosov Moscow State University , Moscow 119991 , Russia.,National University of Science and Technology "MISiS" , Moscow 119049 , Russia
| | - Alexander N Vasiliev
- Lomonosov Moscow State University , Moscow 119991 , Russia.,National University of Science and Technology "MISiS" , Moscow 119049 , Russia.,National Research South Ural State University , Chelyabinsk 454080 , Russia
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism , University of Augsburg , 86135 Augsburg , Germany
| | - Artem M Abakumov
- Skolkovo Institute of Science and Technology , Moscow 143026 , Russia
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13
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Tereshchenko IV, Aksyonov DA, Drozhzhin OA, Presniakov IA, Sobolev AV, Zhugayevych A, Striukov D, Stevenson KJ, Antipov E, Abakumov AM. The Role of Semilabile Oxygen Atoms for Intercalation Chemistry of the Metal-Ion Battery Polyanion Cathodes. J Am Chem Soc 2018; 140:3994-4003. [DOI: 10.1021/jacs.7b12644] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Ivan V. Tereshchenko
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Dmitry A. Aksyonov
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
| | - Oleg A. Drozhzhin
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Igor A. Presniakov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Alexey V. Sobolev
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Andriy Zhugayevych
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
| | - Daniil Striukov
- Faculty of Physics, Southern Federal University, 5 Zorge Street, 344090 Rostov-on-Don, Russian Federation
| | - Keith J. Stevenson
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
| | - Evgeny Antipov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Artem M. Abakumov
- Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Nobel Street 3, 143026 Moscow, Russian Federation
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14
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Aksyonov DA, Hickel T, Neugebauer J, Lipnitskii AG. The impact of carbon and oxygen in alpha-titanium: ab initio study of solution enthalpies and grain boundary segregation. J Phys Condens Matter 2016; 28:385001. [PMID: 27460043 DOI: 10.1088/0953-8984/28/38/385001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The solution, grain boundary (GB) segregation, and co-segregation of carbon and oxygen atoms in α-titanium are studied using density functional theory. For five titanium tilt boundaries, including T1, T2, and C1 twin systems, we determine the GB structure, as well as GB energy and excess volume. The segregation energies and volumes of carbon and oxygen are calculated for 23 inequivalent interstitial voids, while for co-segregation 75 configurations are considered. It is obtained that depending on the type of the segregation void both a positive and a negative segregation process is possible. The physical reasons of segregation are explained in terms of the analysis of the void atomic geometry, excess volume and features of the electronic structure at the Fermi level. Although carbon and oxygen show qualitatively similar properties in α-Ti, several distinctions are observed for their segregation behavior and mutual interactions.
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Affiliation(s)
- D A Aksyonov
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany. The Center of Nanostructured Materials and Nanotechnologies, Belgorod State University, Belgorod, Russian Federation
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