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Choyal V, Sagar N, Sai Gautam G. Constructing and Evaluating Machine-Learned Interatomic Potentials for Li-Based Disordered Rocksalts. J Chem Theory Comput 2024; 20:4844-4856. [PMID: 38787289 DOI: 10.1021/acs.jctc.4c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Lithium-based disordered rocksalts (LDRs), which are an important class of positive electrode materials that can increase the energy density of current Li-ion batteries, represent a significantly complex chemical and configurational space for conventional density functional theory (DFT)-based high-throughput screening approaches. Notably, atom-centered machine-learned interatomic potentials (MLIPs) are a promising pathway to accurately model the potential energy surface of highly disordered chemical spaces, such as LDRs, where the performance of such MLIPs has not been rigorously explored yet. Here, we represent a comprehensive evaluation of the accuracy, transferability, and ease of training of five atom-centered MLIPs, including the artificial neural network potentials developed by the atomic energy network (AENET), the Gaussian approximation potential (GAP), the spectral neighbor analysis potential (SNAP) and its quadratic extension (qSNAP), and the moment tensor potential (MTP), in modeling a 11-component LDR chemical space. Specifically, we generate a DFT-calculated data set of 10,842 configurations of disordered LiTMO2 and TMO2 compositions, where TM = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, and/or Cu. To provide a point-of-comparison on the performance of atom-centered MLIPs, we also trained the neural equivariant interatomic potential (NequIP) on a subset of our data. Importantly, we find AENET to be the best potential in terms of accuracy and transferability for energy predictions, while MTP is the best for atomic forces. While AENET is the fastest to train among the MLIPs considered at low number of epochs (300), the training time increases significantly as epochs increase (3300), with a corresponding reduction in training errors (∼60%). Note that AENET and GAP tend to overfit in small data sets, with the extent of overfitting reducing with larger data sets. Finally, we observe AENET to provide reasonable predictions of average Li-intercalation voltages in layered, single-TM LiTMO2 frameworks, compared to DFT (∼10% error on average). Our study should pave the way both for discovering novel disordered rocksalt electrodes and for modeling other configurationally complex systems, such as high-entropy ceramics and alloys.
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Affiliation(s)
- Vijay Choyal
- Department of Materials Engineering, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Nidhish Sagar
- Department of Materials Engineering, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Gopalakrishnan Sai Gautam
- Department of Materials Engineering, Indian Institute of Science, Bengaluru 560012, Karnataka, India
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2
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Huang J, Ouyang B, Zhang Y, Yin L, Kwon DH, Cai Z, Lun Z, Zeng G, Balasubramanian M, Ceder G. Inhibiting collective cation migration in Li-rich cathode materials as a strategy to mitigate voltage hysteresis. NATURE MATERIALS 2023; 22:353-361. [PMID: 36702887 DOI: 10.1038/s41563-022-01467-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/16/2022] [Indexed: 06/18/2023]
Abstract
Lithium-rich cathodes are promising energy storage materials due to their high energy densities. However, voltage hysteresis, which is generally associated with transition metal migration, limits their energy efficiency and implementation in practical devices. Here we reveal that voltage hysteresis is related to the collective migration of metal ions, and that isolating the migration events from each other by creating partial disorder can create high-capacity reversible cathode materials, even when migrating transition metal ions are present. We demonstrate this on a layered Li-rich chromium manganese oxide that in its fully ordered state displays a substantial voltage hysteresis (>2.5 V) associated with collective transition metal migration into Li layers, but can be made to achieve high capacity (>360 mAh g-1) and energy density (>1,100 Wh kg-1) when the collective migration is perturbed by partial disorder. This study demonstrates that partially cation-disordered cathode materials can accommodate a high level of transition metal migration, which broadens our options for redox couples to those of mobile cations.
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Affiliation(s)
- Jianping Huang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Bin Ouyang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Yaqian Zhang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Liang Yin
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - Deok-Hwang Kwon
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Zijian Cai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Zhengyan Lun
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - Guobo Zeng
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | | | - Gerbrand Ceder
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA.
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3
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Lemoine K, Hémon-Ribaud A, Leblanc M, Lhoste J, Tarascon JM, Maisonneuve V. Fluorinated Materials as Positive Electrodes for Li- and Na-Ion Batteries. Chem Rev 2022; 122:14405-14439. [PMID: 35969894 DOI: 10.1021/acs.chemrev.2c00247] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fluorine is known to be a key element for various components of batteries since current electrolytes rely on Li-ion salts having fluorinated ions and electrode binders are mainly based on fluorinated polymers. Metal fluorides or mixed anion metal fluorides (mainly oxyfluorides) have also gained a substantial interest as active materials for the electrode redox reactions. In this review, metal fluorides for cathodes are considered; they are listed according to the dimensionality of the metal fluoride subnetwork. The synthesis conditions and the crystal structures are described; the electrochemical properties are briefly indicated, and the nature of the electron transport agent is noted. We stress the crucial importance of the elaboration processes to induce the presence of cation disorders, of anion substitutions (mainly F-/O2- or F-/OH-) or vacancies. Finally, we show that an accurate structural characterization is a key step to enable enhanced material performances to overcome several lasting roadblocks, namely the large irreversible capacity and poor energy efficiency that are frequently encountered.
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Affiliation(s)
- Kévin Lemoine
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR CNRS 6283, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France
| | - Annie Hémon-Ribaud
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR CNRS 6283, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France
| | - Marc Leblanc
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR CNRS 6283, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France
| | - Jérôme Lhoste
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR CNRS 6283, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France
| | - Jean-Marie Tarascon
- Collège de France, Chaire de Chimie du Solide et de l'Energie, UMR 8260 CNRS, 11 Place Marcelin Berthelot, 75231 Paris, France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, 80039 Amiens, France
| | - Vincent Maisonneuve
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR CNRS 6283, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France
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4
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UYAMA T, MUKAI K, YAMADA I. High-Pressure Synthesis of Cation-Disordered Rock-Salt Oxyfluorides with High Crystallinity. ELECTROCHEMISTRY 2021. [DOI: 10.5796/electrochemistry.20-65130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Takeshi UYAMA
- Toyota Central Research and Development Laboratories, Inc
| | - Kazuhiko MUKAI
- Toyota Central Research and Development Laboratories, Inc
| | - Ikuya YAMADA
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
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5
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Li X, Chen M, Wang L, Xu H, Zhong J, Zhang M, Wang Y, Zhang Q, Mei L, Wang T, Zhu J, Lu B, Duan X. Nitrogen-doped carbon nanotubes as an anode for a highly robust potassium-ion hybrid capacitor. NANOSCALE HORIZONS 2020; 5:1586-1595. [PMID: 33052993 DOI: 10.1039/d0nh00451k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Potassium ion hybrid capacitors (KIHCs) have drawn growing interest owing to their outstanding energy density, power density and excellent cycling stability. However, the large ionic radius of potassium triggers a huge volume change during continuous K+ insertion/extraction processes, restricting the development of KIHCs. Here, we report N-doped carbon nanotubes (NCNTs) for high-performance K+ storage. The NCNTs possess a hierarchical structure and N functional groups and not only offer sufficient space to relieve the volume expansion, but also provide highly efficient channels to transport electrons and ions. As a result, the NCNTs anode presents a high specific capacity and an excellent cycling stability with an average decay rate of 0.0238% per cycle (the lowest value among the reported carbon-based anodes for K-ions batteries) during 3600 continuous cycles. A potassium ion hybrid capacitor (KIHC) was also designed with the NCNT anode and a commercial active carbon cathode and achieved both a high energy/power density (117.1 W h kg-1/1713.4 W kg-1) and a long cycle life (2000 cycles at 1 A g-1). Moreover, the in situ Raman and ex situ element mapping characterization demonstrate the outstanding electrochemical reversibility of the NCNTs. This work provides a superior strategy to design low-cost anode materials with excellent K+ storage electrochemistry.
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Affiliation(s)
- Xiuqi Li
- State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China.
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6
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Naylor AJ, Källquist I, Peralta D, Martin JF, Boulineau A, Colin JF, Baur C, Chable J, Fichtner M, Edström K, Hahlin M, Brandell D. Stabilization of Li-Rich Disordered Rocksalt Oxyfluoride Cathodes by Particle Surface Modification. ACS APPLIED ENERGY MATERIALS 2020; 3:5937-5948. [PMID: 32954223 PMCID: PMC7493205 DOI: 10.1021/acsaem.0c00839] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Promising theoretical capacities and high voltages are offered by Li-rich disordered rocksalt oxyfluoride materials as cathodes in lithium-ion batteries. However, as has been discovered for many other Li-rich materials, the oxyfluorides suffer from extensive surface degradation, leading to severe capacity fading. In the case of Li2VO2F, we have previously determined this to be a result of detrimental reactions between an unstable surface layer and the organic electrolyte. Herein, we present the protection of Li2VO2F particles with AlF3 surface modification, resulting in a much-enhanced capacity retention over 50 cycles. While the specific capacity for the untreated material drops below 100 mA h g-1 after only 50 cycles, the treated materials retain almost 200 mA h g-1. Photoelectron spectroscopy depth profiling confirms the stabilization of the active material surface by the surface modification and reveals its suppression of electrolyte decomposition.
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Affiliation(s)
- Andrew J. Naylor
- Department
of Chemistry—Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden
| | - Ida Källquist
- Department
of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
| | - David Peralta
- Université
Grenoble-Alpes, CEA-LITEN, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
| | - Jean-Frederic Martin
- Université
Grenoble-Alpes, CEA-LITEN, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
| | - Adrien Boulineau
- Université
Grenoble-Alpes, CEA-LITEN, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
| | - Jean-François Colin
- Université
Grenoble-Alpes, CEA-LITEN, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
| | - Christian Baur
- Helmholtz
Institute Ulm, Helmholtzstraße
11, 89081 Ulm, Germany
| | - Johann Chable
- Helmholtz
Institute Ulm, Helmholtzstraße
11, 89081 Ulm, Germany
| | - Maximilian Fichtner
- Helmholtz
Institute Ulm, Helmholtzstraße
11, 89081 Ulm, Germany
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Box 3640, 76021 Karlsruhe, Germany
| | - Kristina Edström
- Department
of Chemistry—Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden
| | - Maria Hahlin
- Department
of Chemistry—Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden
- Department
of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
| | - Daniel Brandell
- Department
of Chemistry—Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden
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Baur C, Lǎcǎtuşu ME, Fichtner M, Johnsen RE. Insights into Structural Transformations in the Local Structure of Li 2VO 2F Using Operando X-ray Diffraction and Total Scattering: Amorphization and Recrystallization. ACS APPLIED MATERIALS & INTERFACES 2020; 12:27010-27016. [PMID: 32453546 DOI: 10.1021/acsami.0c02391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Disordered rock salt Li2VO2F cathode material for lithium-ion batteries was investigated using operando X-ray diffraction and total scattering to gain insight into the structural changes of the short-range and long-range orders during electrochemical cycling. The X-ray powder diffraction data show the well-known pattern of the disordered rock salt cubic structure, whereas the pair distribution function (PDF) analysis reveals significant deviations from the ideal cubic structure. During battery operation, a reversible rock salt-to-amorphous phase transformation is observed, upon Li extraction and reinsertion. The X-ray total scattering data show strong indications of the formation of tetrahedrally coordinated V in a nondisordered rock salt phase of the charged electrode material. The results show that the disordered rock salt Li2VO2F material undergoes a hidden structural rearrangement during battery operation.
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Affiliation(s)
- Christian Baur
- Helmholtz Institute Ulm, Helmholtzstraβe 11, 89081 Ulm, Germany
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, DK-2800 Kgs. Lyngby, Denmark
| | - Monica-Elisabeta Lǎcǎtuşu
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, DK-2800 Kgs. Lyngby, Denmark
| | - Maximilian Fichtner
- Helmholtz Institute Ulm, Helmholtzstraβe 11, 89081 Ulm, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Rune E Johnsen
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, DK-2800 Kgs. Lyngby, Denmark
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8
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Lee W, Muhammad S, Sergey C, Lee H, Yoon J, Kang Y, Yoon W. Advances in the Cathode Materials for Lithium Rechargeable Batteries. Angew Chem Int Ed Engl 2020; 59:2578-2605. [DOI: 10.1002/anie.201902359] [Citation(s) in RCA: 206] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Wontae Lee
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 South Korea
| | - Shoaib Muhammad
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 South Korea
| | - Chernov Sergey
- Department of Energy and Materials EngineeringDongguk University Seoul 04620 South Korea
| | - Hayeon Lee
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 South Korea
| | - Jaesang Yoon
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 South Korea
| | - Yong‐Mook Kang
- Department of Materials Science and EngineeringKorea University Seoul 02841 South Korea
| | - Won‐Sub Yoon
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 South Korea
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9
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Zhao X, Zhao‐Karger Z, Fichtner M, Shen X. Halide‐Based Materials and Chemistry for Rechargeable Batteries. Angew Chem Int Ed Engl 2020; 59:5902-5949. [DOI: 10.1002/anie.201902842] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 06/24/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Xiangyu Zhao
- State Key Laboratory of Materials-Oriented Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech University Nanjing 211816 China
| | - Zhirong Zhao‐Karger
- Helmholtz Institute Ulm (HIU)Electrochemical Energy Storage Helmholtzstrasse 11 89081 Ulm Germany
| | - Maximilian Fichtner
- Helmholtz Institute Ulm (HIU)Electrochemical Energy Storage Helmholtzstrasse 11 89081 Ulm Germany
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT) 76344 Eggenstein-Leopoldshafen Germany
| | - Xiaodong Shen
- State Key Laboratory of Materials-Oriented Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech University Nanjing 211816 China
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10
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Zhao X, Zhao‐Karger Z, Fichtner M, Shen X. Halogenid‐basierte Materialien und Chemie für wiederaufladbare Batterien. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201902842] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiangyu Zhao
- State Key Laboratory of Materials-Oriented Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech University Nanjing 211816 China
| | - Zhirong Zhao‐Karger
- Helmholtz-Institut UlmElektrochemische Energiespeicherung (HIU) Helmholtzstraße 11 89081 Ulm Deutschland
| | - Maximilian Fichtner
- Helmholtz-Institut UlmElektrochemische Energiespeicherung (HIU) Helmholtzstraße 11 89081 Ulm Deutschland
- Institut für NanotechnologieKarlsruhe Institut für Technologie (KIT) 76344 Eggenstein-Leopoldshafen Deutschland
| | - Xiaodong Shen
- State Key Laboratory of Materials-Oriented Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech University Nanjing 211816 China
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11
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Jung SK, Hwang I, Chang D, Park KY, Kim SJ, Seong WM, Eum D, Park J, Kim B, Kim J, Heo JH, Kang K. Nanoscale Phenomena in Lithium-Ion Batteries. Chem Rev 2019; 120:6684-6737. [PMID: 31793294 DOI: 10.1021/acs.chemrev.9b00405] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The electrochemical properties and performances of lithium-ion batteries are primarily governed by their constituent electrode materials, whose intrinsic thermodynamic and kinetic properties are understood as the determining factor. As a part of complementing the intrinsic material properties, the strategy of nanosizing has been widely applied to electrodes to improve battery performance. It has been revealed that this not only improves the kinetics of the electrode materials but is also capable of regulating their thermodynamic properties, taking advantage of nanoscale phenomena regarding the changes in redox potential, solid-state solubility of the intercalation compounds, and reaction paths. In addition, the nanosizing of materials has recently enabled the discovery of new energy storage mechanisms, through which unexplored classes of electrodes could be introduced. Herein, we review the nanoscale phenomena discovered or exploited in lithium-ion battery chemistry thus far and discuss their potential implications, providing opportunities to further unveil uncharted electrode materials and chemistries. Finally, we discuss the limitations of the nanoscale phenomena presently employed in battery applications and suggest strategies to overcome these limitations.
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Affiliation(s)
- Sung-Kyun Jung
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea.,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Insang Hwang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Donghee Chang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Kyu-Young Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Sung Joo Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Won Mo Seong
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Donggun Eum
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jooha Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Byunghoon Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jihyeon Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jae Hoon Heo
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Kisuk Kang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea.,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-742, Republic of Korea.,Institute of Engineering Research, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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12
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Yang M, Jin J, Shen Y, Sun S, Zhao X, Shen X. Cation-Disordered Lithium-Excess Li-Fe-Ti Oxide Cathode Materials for Enhanced Li-Ion Storage. ACS APPLIED MATERIALS & INTERFACES 2019; 11:44144-44152. [PMID: 31687798 DOI: 10.1021/acsami.9b14137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cation-disordered Li-excess lithium-transition metal (Li-TM) oxides designed based on the percolation theory are regarded as a promising new type of high-performance cathode material for Li-ion batteries. Herein, cation-disordered rocksalt-type Li-Fe-Ti oxides of Li0.89Fe0.44Ti0.45O2, Li1.18Fe0.34Ti0.45O2, and Li1.24Fe0.38Ti0.38O2 with different Li-to-transition metal ratios (Li/TM = 1, 1.49, or 1.63) are investigated to understand the effect of a Li excess on the electrochemical Li-ion storage properties. The Li excess leads to local structural fluctuations of the as-prepared Li-Fe-Ti oxides, contributing to the formation of 0-TM diffusion channels for rapid Li-ion migration. The as-prepared Li-excess Li-Fe-Ti oxide cathodes (Li/TM = 1.49 and Li/TM = 1.63) deliver a higher reversible capacity of over 220 mAh g-1 and a better rate capability compared to the Li/TM = 1 electrode, which possesses a maximum discharge capacity of only about 165 mAh g-1. The redox reactions of Fe2+/Fe3+ and O2-/O22- achieve the main capacity of the Li-excess Li-Fe-Ti oxide cathodes during cycling, as supported by 57Fe Mössbauer spectroscopy, O 1s X-ray photoelectron spectroscopy, and O K-edge soft X-ray absorption spectroscopy.
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13
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Lee W, Muhammad S, Sergey C, Lee H, Yoon J, Kang Y, Yoon W. Kathodenmaterialien für wiederaufladbare Lithiumbatterien. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902359] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Wontae Lee
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 Südkorea
| | - Shoaib Muhammad
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 Südkorea
| | - Chernov Sergey
- Department of Energy and Materials EngineeringDongguk University Seoul 04620 Südkorea
| | - Hayeon Lee
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 Südkorea
| | - Jaesang Yoon
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 Südkorea
| | - Yong‐Mook Kang
- Department of Materials Science and EngineeringKorea University Seoul 02841 Südkorea
| | - Won‐Sub Yoon
- Department of Energy ScienceSungkyunkwan University Suwon 440–746 Südkorea
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14
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Cambaz MA, Vinayan BP, Euchner H, Pervez SA, Geßwein H, Braun T, Gross A, Fichtner M. Design and Tuning of the Electrochemical Properties of Vanadium-Based Cation-Disordered Rock-Salt Oxide Positive Electrode Material for Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39848-39858. [PMID: 31589014 DOI: 10.1021/acsami.9b12566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Disordered rock-salt compounds are becoming increasingly important due to their potential as high-capacity positive electrode materials for lithium-ion batteries. Thereby, a significant number of studies have focused on increasing the accessible Li capacity, but studies to manipulate the electrochemical potential are limited. This work explores the effect of transition-metal substitution on the electrochemistry of ternary disordered rock-salt-type compounds with LiM2+0.5V0.54+O2 stoichiometry (M = Mn, Fe, Co) directly synthesized through mechanochemistry. Rietveld refinements of synchrotron X-ray diffraction patterns confirm the disordered rock-salt structures. First-principles density functional theory study is used to predict the impact of the cation substitution on the expected average voltage and the electronic structures of these materials are used to analyze the underlying redox processes. For LiM2+0.5V4+0.5O2 (M = Mn, Fe, Co), discharge voltages increase in the order of Mn < Fe < Co with 2.28, 2.41, and 2.51 V, exhibiting discharge capacities of 219, 207, and 234 mAh g-1, respectively. In comparison, for the disordered rock-salt Li2VO3, an average discharge voltage of ∼2.2 V with V5+/4+ redox couple has been reported. However, detrimental electrode-electrolyte interactions manifested as transition-metal dissolution has been found to result in severe capacity fading. Thereto, the use of a concentrated 5.5 M LiFSI increased the cycling stability significantly, effectively reducing transition-metal dissolution. The underlying reasons for the capacity fading of disordered rock salts are yet unclear. We stress the importance of cathode-electrolyte interactions, thus opening new directions for the improvement of cation-disordered materials.
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Affiliation(s)
- Musa Ali Cambaz
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
| | - Bhaghavathi P Vinayan
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
| | - Holger Euchner
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
- Institute of Theoretical Chemistry , Ulm University , 89069 Ulm , Germany
| | - Syed Atif Pervez
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
| | | | - Tobias Braun
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
| | - Axel Gross
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
- Institute of Theoretical Chemistry , Ulm University , 89069 Ulm , Germany
| | - Maximilian Fichtner
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU) , Helmholtzstr. 11 , 89081 Ulm , Germany
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15
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Chang JH, Kleiven D, Melander M, Akola J, Garcia-Lastra JM, Vegge T. CLEASE: a versatile and user-friendly implementation of cluster expansion method. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:325901. [PMID: 31013487 DOI: 10.1088/1361-648x/ab1bbc] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Materials exhibiting a substitutional disorder such as multicomponent alloys and mixed metal oxides/oxyfluorides are of great importance in many scientific and technological sectors. Disordered materials constitute an overwhelmingly large configurational space, which makes it practically impossible to be explored manually using first-principles calculations such as density functional theory due to the high computational costs. Consequently, the use of methods such as cluster expansion (CE) is vital in enhancing our understanding of the disordered materials. CE dramatically reduces the computational cost by mapping the first-principles calculation results on to a Hamiltonian which is much faster to evaluate. In this work, we present our implementation of the CE method, which is integrated as a part of the atomic simulation environment (ASE) open-source package. The versatile and user-friendly code automates the complex set up and construction procedure of CE while giving the users the flexibility to tweak the settings and to import their own structures and previous calculation results. Recent advancements such as regularization techniques from machine learning are implemented in the developed code. The code allows the users to construct CE on any bulk lattice structure, which makes it useful for a wide range of applications involving complex materials. We demonstrate the capabilities of our implementation by analyzing the two example materials with varying complexities: a binary metal alloy and a disordered lithium chromium oxyfluoride.
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Affiliation(s)
- Jin Hyun Chang
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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16
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Yabuuchi N. Material Design Concept of Lithium-Excess Electrode Materials with Rocksalt-Related Structures for Rechargeable Non-Aqueous Batteries. CHEM REC 2019; 19:690-707. [PMID: 30311732 DOI: 10.1002/tcr.201800089] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 09/26/2018] [Indexed: 01/24/2023]
Abstract
Dependence on lithium-ion batteries for automobile applications is rapidly increasing, and further improvement, especially for positive electrode materials, is indispensable to increase energy density of lithium-ion batteries. In the past several years, many new lithium-excess high-capacity electrode materials with rocksalt-related structures have been reported. These materials deliver high reversible capacity with cationic/anionic redox and percolative lithium migration in the oxide/oxyfluoride framework structures, and recent research progresses on these electrode materials are reviewed. Material design strategies for these lithium-excess electrode materials are also described. Future possibility of high-energy non-aqueous batteries with advanced positive electrode materials is discussed for more details.
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Affiliation(s)
- Naoaki Yabuuchi
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa, 240-8501, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
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17
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Groß A. Fundamental Challenges for Modeling Electrochemical Energy Storage Systems at the Atomic Scale. Top Curr Chem (Cham) 2018; 376:17. [DOI: 10.1007/s41061-018-0194-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 03/23/2018] [Indexed: 10/17/2022]
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18
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Baur C, Chable J, Klein F, Chakravadhanula VSK, Fichtner M. Reversible Delithiation of Disordered Rock Salt LiVO2. ChemElectroChem 2018. [DOI: 10.1002/celc.201800189] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Christian Baur
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
| | - Johann Chable
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
| | - Franziska Klein
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
| | | | - Maximilian Fichtner
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; P.O. Box 3640 76021 Karlsruhe Germany
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19
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Chavez JS, Harrison K, Sava Gallis DF. Na intercalation in Fe-MIL-100 for aqueous Na-ion batteries. RSC Adv 2017. [DOI: 10.1039/c7ra01629h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The electrochemical activity of Fe-MIL-100 in a Na aqueous electrolyte is greatly dependent on the binder additive, where the best performance is achieved with Nafion, owing to its hydrophilic and ion conducting nature.
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Affiliation(s)
- James S. Chavez
- Nanoscale Sciences Department
- Sandia National Laboratories
- Albuquerque
- USA
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20
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Zhang L, Dou SX, Liu HK, Huang Y, Hu X. Symmetric Electrodes for Electrochemical Energy-Storage Devices. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2016; 3:1600115. [PMID: 27981003 PMCID: PMC5157170 DOI: 10.1002/advs.201600115] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 04/28/2016] [Indexed: 05/30/2023]
Abstract
Increasing environmental problems and energy challenges have so far attracted urgent demand for developing green and efficient energy-storage systems. Among various energy-storage technologies, sodium-ion batteries (SIBs), electrochemical capacitors (ECs) and especially the already commercialized lithium-ion batteries (LIBs) are playing very important roles in the portable electronic devices or the next-generation electric vehicles. Therefore, the research for finding new electrode materials with reduced cost, improved safety, and high-energy density in these energy storage systems has been an important way to satisfy the ever-growing demands. Symmetric electrodes have recently become a research focus because they employ the same active materials as both the cathode and anode in the same energy-storage system, leading to the reduced manufacturing cost and simplified fabrication process. Most importantly, this feature also endows the symmetric energy-storage system with improved safety, longer lifetime, and ability of charging in both directions. In this Progress Report, we provide the comprehensive summary and comment on different symmetric electrodes and focus on the research about the applications of symmetric electrodes in different energy-storage systems, such as the above mentioned SIBs, ECs and LIBs. Further considerations on the possibility of mass production have also been presented.
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Affiliation(s)
- Lei Zhang
- State Key Laboratory of Materials Processing and Die and Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074P. R. China
- Institute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongNSW2522Australia
| | - Shi Xue Dou
- Institute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongNSW2522Australia
| | - Hua Kun Liu
- Institute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongNSW2522Australia
| | - Yunhui Huang
- State Key Laboratory of Materials Processing and Die and Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074P. R. China
| | - Xianluo Hu
- State Key Laboratory of Materials Processing and Die and Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074P. R. China
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21
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Chen R, Ren S, Mu X, Maawad E, Zander S, Hempelmann R, Hahn H. High-Performance Low-Temperature Li+
Intercalation in Disordered Rock-Salt Li-Cr-V Oxyfluorides. ChemElectroChem 2016. [DOI: 10.1002/celc.201600033] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruiyong Chen
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; Hermann-von-Helmholtz-Platz 1 76021 Karlsruhe Germany
- Joint Electrochemistry Lab; KIST Europe/Saarland University, Campus E7 1; 66123 Saarbrücken Germany
| | - Shuhua Ren
- Institute of Nanotechnology; Karlsruhe Institute of Technology; Hermann-von-Helmholtz-Platz 1 76021 Karlsruhe Germany
| | - Xiaoke Mu
- Institute of Nanotechnology; Karlsruhe Institute of Technology; Hermann-von-Helmholtz-Platz 1 76021 Karlsruhe Germany
| | - Emad Maawad
- Institute of Materials Research; Helmholtz-Zentrum Geesthacht; Notkestraße 85 22607 Hamburg Germany
| | - Stefan Zander
- Structure and Dynamics of Energy Materials; Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Str. 15 12489 Berlin Germany
| | - Rolf Hempelmann
- Joint Electrochemistry Lab; KIST Europe/Saarland University, Campus E7 1; 66123 Saarbrücken Germany
| | - Horst Hahn
- Helmholtz Institute Ulm; Helmholtzstraße 11 89081 Ulm Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; Hermann-von-Helmholtz-Platz 1 76021 Karlsruhe Germany
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22
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Cambaz MA, Vinayan BP, Clemens O, Munnangi AR, Chakravadhanula VSK, Kübel C, Fichtner M. Vanadium Oxyfluoride/Few-Layer Graphene Composite as a High-Performance Cathode Material for Lithium Batteries. Inorg Chem 2016; 55:3789-96. [DOI: 10.1021/acs.inorgchem.5b02687] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Musa Ali Cambaz
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Helmholtzstr. 11, 89081 Ulm, Germany
| | - B. P. Vinayan
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Helmholtzstr. 11, 89081 Ulm, Germany
| | - Oliver Clemens
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany
- Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt, Jovanka-Bontschits-Straße 2, 64287 Darmstadt, Germany
| | - Anji Reddy Munnangi
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Helmholtzstr. 11, 89081 Ulm, Germany
| | | | - Christian Kübel
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Helmholtzstr. 11, 89081 Ulm, Germany
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Maximilian Fichtner
- Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Helmholtzstr. 11, 89081 Ulm, Germany
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany
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23
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Chen R, Maawad E, Knapp M, Ren S, Beran P, Witter R, Hempelmann R. Lithiation-driven structural transition of VO2F into disordered rock-salt LixVO2F. RSC Adv 2016. [DOI: 10.1039/c6ra14276a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Disordered rock-salt LixVO2F formed through electrochemical lithiation exhibits promising performance when evaluated as a cathode material for Li batteries.
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Affiliation(s)
- Ruiyong Chen
- Joint Electrochemistry Lab
- KIST Europe/Saarland University
- 66123 Saarbrücken
- Germany
| | - Emad Maawad
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 22607 Hamburg
- Germany
| | - Michael Knapp
- Institute for Applied Materials
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Shuhua Ren
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Přemysl Beran
- Nuclear Physics Institute
- Academy of Sciences of the Czech Republic
- 25068 Řež near Prague
- Czech Republic
| | - Raiker Witter
- Technomedicum
- Tallinn University of Technology
- 19086 Tallinn
- Estonia
| | - Rolf Hempelmann
- Joint Electrochemistry Lab
- KIST Europe/Saarland University
- 66123 Saarbrücken
- Germany
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24
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Chen R, Witte R, Heinzmann R, Ren S, Mangold S, Hahn H, Hempelmann R, Ehrenberg H, Indris S. Identifying the redox activity of cation-disordered Li–Fe–V–Ti oxide cathodes for Li-ion batteries. Phys Chem Chem Phys 2016; 18:7695-701. [DOI: 10.1039/c6cp00131a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combined element-sensitive techniques reveal the redox activity of mixed transition metals in cation disordered rock-salt oxide cathodes.
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Affiliation(s)
- Ruiyong Chen
- Institute for Applied Materials – Energy Storage Systems
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
- Institute of Nanotechnology
| | - Ralf Witte
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | | | - Shuhua Ren
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Stefan Mangold
- ANKA Synchrotron Radiation Facility
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Horst Hahn
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Rolf Hempelmann
- Joint Electrochemistry Lab
- KIST Europe/Saarland University
- 66123 Saarbrücken
- Germany
| | - Helmut Ehrenberg
- Institute for Applied Materials – Energy Storage Systems
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
| | - Sylvio Indris
- Institute for Applied Materials – Energy Storage Systems
- Karlsruhe Institute of Technology
- 76021 Karlsruhe
- Germany
- Institute of Nanotechnology
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25
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Chen R, Ren S, Yavuz M, Guda AA, Shapovalov V, Witter R, Fichtner M, Hahn H. Li(+) intercalation in isostructural Li2VO3 and Li2VO2F with O(2-) and mixed O(2-)/F(-) anions. Phys Chem Chem Phys 2015; 17:17288-95. [PMID: 26073634 DOI: 10.1039/c5cp02505b] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mixed-anion materials for Li-ion batteries have been attracting attention in view of their tunable electrochemical properties. Herein, we compare two isostructural (Fm3̅m) model intercalation materials Li2VO3 and Li2VO2F with O(2-) and mixed O(2-)/F(-) anions, respectively. Synchrotron X-ray diffraction and pair distribution function data confirm large structural similarity over long-range and at the atomic scale for these materials. However, they show distinct electrochemical properties and kinetic behaviour arising from the different anion environments and the consequent difference in cationic electrostatic repulsion. In comparison with Li2VO3 with an active V(4+/5+) redox reaction, the material Li2VO2F with oxofluoro anions and the partial activity of V(3+/5+) redox reaction favor higher theoretical capacity (460 mA h g(-1)vs. 230 mA h g(-1)), higher voltage (2.5 V vs. 2.2 V), lower polarization (0.1 V vs. 0.3 V) and faster Li(+) chemical diffusion (∼10(-9) cm(2) s(-1)vs. ∼10(-11) cm(2) s(-1)). This work not only provides insights into the understanding of anion chemistry, but also suggests the rational design of new mixed-anion battery materials.
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Affiliation(s)
- Ruiyong Chen
- Helmholtz Institute Ulm for Electrochemical Energy Storage, 89081 Ulm, Germany.
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