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Zeng Z, Wang J, Zhang S, Han B, Dang F, Li S, Du Y. Understanding the electrochemical properties of Mg-doped Li 2MnO 3: first-principles calculations. Phys Chem Chem Phys 2024. [PMID: 38935024 DOI: 10.1039/d4cp01733a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Non-transition metal doping, especially for Mg, has been gradually employed to optimize the electrochemical performance of Li-rich cathode material Li2MnO3. However, the effects of Mg doping on the electrochemical behavior of Li2MnO3 have not been studied extensively. In this work, we investigate the effect of Mg doping at both the 2b (in the Li/Mn mixed layer) and 4h (in the Li layer) Li sites on the electrochemical properties of Li2MnO3 through first-principles calculations and ab initio molecular dynamics simulations. The local lattice structure, electronic density of states, Bader charge, delithiation voltage, lattice oxygen stability and Li diffusion kinetics are examined. Electronic structure analysis shows that Mg can activate the electrochemical activity of surrounding Mn by charge transfer, making Mn participate in charge compensation at the initial delithiation stage. Mg doping can also cause an increase in the average oxygen vacancy formation energy and hence depress the oxygen release during the delithiation process. Molecular dynamics simulations show that the diffusion kinetics of Li ions in Mg2b-Li2MnO3 is enhanced with respect to the undoped one, whereas Mg doped at the 4h site cannot improve the diffusion kinetics of Li ions. Further studies found that Mg doped at the 2b site results in a decrease in the energy barrier for the intra-layer diffusion and an increase in the energy barrier for the inter-layer diffusion of the nearby Li vacancies.
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Affiliation(s)
- Ziquan Zeng
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Jianchuan Wang
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Shiwei Zhang
- College of Energy and Electrical Engineering, Qinghai University, 810016, Xining, China
| | - Bo Han
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Feng Dang
- Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials (Ministry of Education), Shandong University, 250061, Jinan, China
| | - Songlin Li
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Yong Du
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
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Zhang X, Zuo W, Liu S, Zhao C, Li Q, Gao Y, Liu X, Xiao D, Hwang I, Ren Y, Sun CJ, Chen Z, Wang B, Feng Y, Yang W, Xu GL, Amine K, Yu H. High-Energy Earth-Abundant Cathodes with Enhanced Cationic/Anionic Redox for Sustainable and Long-Lasting Na-Ion Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2310659. [PMID: 38871360 DOI: 10.1002/adma.202310659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 05/19/2024] [Indexed: 06/15/2024]
Abstract
Layered iron/manganese-based oxides are a class of promising cathode materials for sustainable batteries due to their high energy densities and earth abundance. However, the stabilization of cationic and anionic redox reactions in these cathodes during cycling at high voltage remain elusive. Here, an electrochemically/thermally stable P2-Na0.67Fe0.3Mn0.5Mg0.1Ti0.1O2 cathode material with zero critical elements is designed for sodium-ion batteries (NIBs) to realize a highly reversible capacity of ≈210 mAh g-1 at 20 mA g-1 and good cycling stability with a capacity retention of 74% after 300 cycles at 200 mA g-1, even when operated with a high charge cut-off voltage of 4.5 V versus sodium metal. Combining a suite of cutting-edge characterizations and computational modeling, it is shown that Mg/Ti co-doping leads to stabilized surface/bulk structure at high voltage and high temperature, and more importantly, enhances cationic/anionic redox reaction reversibility over extended cycles with the suppression of other undesired oxygen activities. This work fundamentally deepens the failure mechanism of Fe/Mn-based layered cathodes and highlights the importance of dopant engineering to achieve high-energy and earth-abundant cathode material for sustainable and long-lasting NIBs.
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Affiliation(s)
- Xu Zhang
- Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Wenhua Zuo
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Shiqi Liu
- Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Chen Zhao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Qingtian Li
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050, China
| | - Yibo Gao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Xiang Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Dongdong Xiao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Inhui Hwang
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA
| | - Yang Ren
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA
| | - Cheng-Jun Sun
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA
| | - Zonghai Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Boya Wang
- Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Yunfa Feng
- Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Wanli Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Gui-Liang Xu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Khalil Amine
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Haijun Yu
- Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, P. R. China
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Zhang S, Wang J, Liu H, Zhang W, Sun L, Du Y, Seifert HJ, Lei T. Revealing the different effects of VIB transition metals X (X = Cr, Mo, W) on the electrochemical performance of Li-rich cathode Li 2MnO 3 by first-principles calculations. NANOSCALE 2022; 14:15034-15047. [PMID: 36197320 DOI: 10.1039/d2nr04894a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Transition metal (TM) doping is widely applied to optimize the electrochemical performance of Li2MnO3, a promising cathode material of next-generation Li-ion batteries. The effect of doping on the performance of Li2MnO3 can vary with the elemental period of the doped TM. However, the rules of the different effects have not been well summarized, especially for TM elements within the same group. In this work, the effects of TM element (Cr, Mo, and W in group VIB) dilute doping on the electrochemical performance of Li2MnO3 are investigated through first-principles calculations. The results show that Mo and W can induce more obvious local lattice distortion. Although Cr, Mo and W doping can improve the electrochemical activity of Li2MnO3, they modify the charge compensation mechanism in different ways. At the initial stage of delithiation, both Cr and O undergo significant oxidation, and Mo can act as the main oxidation center, while W can trigger the electrochemical activity of Mn around it. The O ions around Mo and W are more stable during the delithiation due to the mild oxidation and the strong bonding of Mo-O and W-O. Furthermore, Cr, Mo and W dilute doping can promote the interlayer diffusion of Li at the initial charging state, which is gradually enhanced with the increase of the period of the doped elements, but Mo and W doping would hinder the intralayer diffusion of Li near the doping sites during further delithiation process. Our results highlight the difference in the effects of TM (in the same group) doping on the performance of Li2MnO3 and would facilitate fast and good design of Li-rich cathodes.
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Affiliation(s)
- Shiwei Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Jianchuan Wang
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Huan Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, 250061, Jinan, China
| | - Weibin Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, 250061, Jinan, China
| | - Lixian Sun
- Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, 541004, Guilin, China
| | - Yong Du
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
| | - Hans J Seifert
- Institute for Applied Materials, Karlsruhe Institute of Technology, Germany
| | - Ting Lei
- State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China.
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Abstract
Parasitic reactions between delithiated cathode materials and non-aqueous electrolytes have been a major barrier that limits the upper cutoff potential of cathode materials. It is of great importance to suppress such parasitic reactions to unleash the high-energy-density potential of high voltage cathode materials. Although major effort has been made to identify the chemical composition of the cathode electrolyte interface using various cutting edge characterization tools, the chemical nature of parasitic reactions remains a puzzle. This severely hinders the rational development of stable high voltage cathode/electrolyte pairs for high-energy density lithium-ion batteries. This feature article highlights our latest effort in understanding the chemical/electrochemical role of the cathode electrolyte interface using protons as a chemical tracer for parasitic reactions.
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Affiliation(s)
- Zonghai Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.
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5
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Elucidating the effect of Nb doping on the electrochemical performance of Fe–Mn based Li-rich cathode materials. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139744] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Liu X, Liang Z, Xiang Y, Lin M, Li Q, Liu Z, Zhong G, Fu R, Yang Y. Solid-State NMR and MRI Spectroscopy for Li/Na Batteries: Materials, Interface, and In Situ Characterization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005878. [PMID: 33788341 DOI: 10.1002/adma.202005878] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 01/28/2021] [Indexed: 06/12/2023]
Abstract
Enhancing the electrochemical performance of batteries, including the lifespan, energy, and power densities, is an everlasting quest for the rechargeable battery community. However, the dynamic and coupled (electro)chemical processes that occur in the electrode materials as well as at the electrode/electrolyte interfaces complicate the investigation of their working and decay mechanisms. Herein, the recent developments and applications of solid-state nuclear magnetic resonance (ssNMR) and magnetic resonance imaging (MRI) techniques in Li/Na batteries are reviewed. Several typical cases including the applications of NMR spectroscopy for the investigation of the pristine structure and the dynamic structural evolution of materials are first emphasized. The NMR applications in analyzing the solid electrolyte interfaces (SEI) on the electrode are further concluded, involving the identification of SEI components and investigation of ionic motion through the interfaces. Beyond, the new development of in situ NMR and MRI techniques are highlighted, including their advantages, challenges, applications and the design principle of in situ cell. In the end, a prospect about how to use ssNMR in battery research from the perspectives of materials, interface, and in situ NMR, aiming at obtaining deeper insight of batteries with the assistance of ssNMR is represented.
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Affiliation(s)
- Xiangsi Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Ziteng Liang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Yuxuan Xiang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Min Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Qi Li
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Zigeng Liu
- Forschungszentrum Jülich, IEK-9, 52425, Jülich, Germany
| | - Guiming Zhong
- Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, 361021, P. R. China
| | - Riqiang Fu
- National High Magnetic Field Laboratory, 1800 E. Paul Dirac Drive, Tallahassee, FL, 32310, USA
| | - Yong Yang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
- College of Energy, Xiamen University, Xiamen, 361005, P. R. China
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Bae J, Kim M, Kang H, Kim T, Choi H, Kim B, Do HW, Shim W. Kinetic 2D Crystals via Topochemical Approach. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006043. [PMID: 34013602 DOI: 10.1002/adma.202006043] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/06/2020] [Indexed: 06/12/2023]
Abstract
The designing of novel materials is a fascinating and innovative pathway in materials science. Particularly, novel layered compounds have tremendous influence in various research fields. Advanced fundamental studies covering various aspects, including reactants and synthetic methods, are required to obtain novel layered materials with unique physical and chemical properties. Among the promising synthetic techniques, topochemical approaches have afforded the platform for widening the extent of novel 2D materials. Notably, the synthesis of binary layered materials is considered as a major scientific breakthrough after the synthesis of graphene as they exhibit a wide spectrum of material properties with varied potential applicability. In this review, a comprehensive overview of the progress in the development of metastable layered compounds is presented. The various metastable layered compounds synthesized from layered ternary bulk materials through topochemical approaches are listed, followed by the descriptions of their mechanisms, structural analyses, characterizations, and potential applications. Finally, an essential research direction concerning the synthesis of new materials is indicated, wherein the possible application of topochemical approaches in unprecedented areas is explored.
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Affiliation(s)
- Jihong Bae
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Minjung Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Hyeonsoo Kang
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Taeyoung Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Hong Choi
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Bokyeong Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Hyung Wan Do
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
| | - Wooyoung Shim
- Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, South Korea
- Center for Multi-Dimensional Materials, Yonsei University, Seoul, 03722, South Korea
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Wang T, Zhang C, Li S, Shen X, Zhou L, Huang Q, Liang C, Wang Z, Wang X, Wei W. Regulating Anion Redox and Cation Migration to Enhance the Structural Stability of Li-Rich Layered Oxides. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12159-12168. [PMID: 33666083 DOI: 10.1021/acsami.1c01351] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lithium-rich manganese-based layered oxide cathodes (LLOs) with oxygen redox reactions are considered to be potential candidates for the next generation of high-energy-density Li-ion batteries. However, the oxygen redox process that enables ultrahigh specific capacity usually leads to irreversible O2 release and cation migration, which induce structure degradation and severe capacity/voltage losses and thus limit the commercial application of LLOs. Herein, we successfully synthesized chlorine (Cl)-doped Co-free LLOs (Li1.2Mn0.53Ni0.27O1.976Cl0.024) and analyzed the effect of anion doping on oxygen redox and structure stability of LLOs. Cl doping has been proven to decrease the irreversible lattice oxygen loss to enhance the redox reversibility of oxygen and inhibit the transition-metal migration during cycles, which substantially enhances the capacity and voltage retention and improves the rate capability during cycling. This work provides new insights for the development of high-performance TM oxide cathode materials with reversible oxygen redox.
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Affiliation(s)
- Tianshuo Wang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Chunxiao Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Shuwei Li
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xi Shen
- Laboratory for Advanced Materials and Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Liangjun Zhou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Qun Huang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Chaoping Liang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Zhaoxiang Wang
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xuefeng Wang
- Laboratory for Advanced Materials and Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Weifeng Wei
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
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Li Q, Lebens-Higgins ZW, Li Y, Meng YS, Chuang YD, Piper LFJ, Liu Z, Yang W. Could Irradiation Introduce Oxidized Oxygen Signals in Resonant Inelastic X-ray Scattering of Battery Electrodes? J Phys Chem Lett 2021; 12:1138-1143. [PMID: 33476153 DOI: 10.1021/acs.jpclett.0c03639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The characterization of oxidized oxygen states through high-efficiency mapping of resonant inelastic X-ray scattering (mRIXS) has become a crucial approach for studying the oxygen redox activities in high-energy battery cathodes. However, this approach has been recently challenged due to the concern of irradiation damage. Here we revisited a typical Li-rich electrode, Li1.144Ni0.136Mn0.544Co0.136O2, in both lithiated and delithiated states and evaluated the X-ray irradiation effect in the lengthy mRIXS experiments. Our results show that irradiation cannot introduce any oxidized oxygen feature, and the features of oxidized oxygen are weakened with a high X-ray dose. The results confirm again that mRIXS detects the intrinsic oxidized oxygen state in battery electrodes. However, the distinct irradiation effects in different systems imply that irradiation could selectively target the least stable elemental or chemical states, which should be analyzed with caution in the study of active chemical states.
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Affiliation(s)
- Qingtian Li
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | | | | | - Yi-de Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - Zhi Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wanli Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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10
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Guo L, Tan X, Mao D, Zhao T, Song L, Liu Y, Kang X, Wang H, Sun L, Chu W. Improved electrochemical activity of the Li2MnO3-like superstructure in high-nickel Li-rich layered oxide Li1.2Ni0.4Mn0.4O2 and its enhanced performances via tungsten doping. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137808] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Wu J, Shen ZX, Yang W. Redox Mechanism in Na-Ion Battery Cathodes Probed by Advanced Soft X-Ray Spectroscopy. Front Chem 2020; 8:816. [PMID: 33102438 PMCID: PMC7522200 DOI: 10.3389/fchem.2020.00816] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 08/04/2020] [Indexed: 12/12/2022] Open
Abstract
A Na-ion battery (NIB) device is a promising solution for mid-/large-scale energy storage, with the advantages of material abundance, low cost, and environmental benignity. To improve the NIB capacity and retainability, extensive efforts have been put into the developments of NIB electrode materials. The redox activities of the transition metal (TM)-based NIB electrodes are critical in defining the capacity and stability. Here, we provide a comprehensive review on recent studies of the redox mechanisms of NIB cathodes through synchrotron-based soft X-ray absorption spectroscopy (sXAS) and mapping of resonant inelastic X-ray scattering (mRIXS). These soft X-ray techniques are direct and effective tools to fingerprint the TM-3d and O-p states with both bulk and surface sensitivities. Particularly, 3d TM L-edge sXAS has been used to quantify the cationic redox contributions to the electrochemical property; however, it suffers from lineshape distortion for the bulk sensitive signals in some scenarios. With the new dimension of information along the emitted photon energy, mRIXS can address the distortion issue of in TM-L sXAS; moreover, it also breaks through the limitation of conventional sXAS on detecting unconventional TM and O states, e.g., Mn(I) in NIB anode and oxidized oxygen in NIB cathodes. The mRIXS fingerprint of the oxidized oxygen state enables the detection of the reversibility of the oxygen redox reaction through the evolution of feature intensity upon electrochemical cycling and thus clarifies various misunderstandings in our conventional wisdom. We conclude that, with mRIXS established as a powerful tool, its potential and power will continue to be explored for characterizing novel chemical states in NIB electrodes.
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Affiliation(s)
- Jinpeng Wu
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA, United States.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, United States.,Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, United States
| | - Zhi-Xun Shen
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA, United States.,Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, United States.,Department of Physics and Applied Physics, Stanford University, Stanford, CA, United States
| | - Wanli Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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12
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Zheng S, Zhou K, Zheng F, Liu H, Zhong G, Zuo W, Xu N, Zhao G, Luo M, Wu J, Zhang C, Zhang Z, Wu S, Yang Y. Mn 4+-Substituted Li-Rich Li 1.2Mn 0.43+Mn x4+Ti 0.4-xO 2 Materials with High Energy Density. ACS APPLIED MATERIALS & INTERFACES 2020; 12:40347-40354. [PMID: 32805881 DOI: 10.1021/acsami.0c11544] [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
In this work, Li-rich Li1.2Mn0.43+Mnx4+Ti0.4-xO2 (LMMxTO, 0 ≤ x ≤ 0.4) oxides have been studied for the first time. X-ray diffraction (XRD) patterns show a cation-disordered rocksalt structure when x ranges from 0 to 0.2. After Mn4+ substitution, LMM0.2TO delivers a high specific capacity of 322 mAh g-1 at room temperature (30 °C, 30 mA g-1) and even 352 mAh g-1 (45 °C, 30 mA g-1) with an energy density of 1041 Wh kg-1. The reason for such a high capacity of LMM0.2TO is ascribed to the increase of both cationic (Mn) and anionic (O) redox after Mn4+ substitution, which is proved by dQ/dV curves, X-ray absorption near edge structure, DFT calculations, and in situ XRD results. In addition, the roles of Mn3+ and Ti4+ in LMM0.2TO are also discussed in detail. A ternary phase diagram is established to comprehend and further optimize the earth-abundant Mn3+-Mn4+-Ti4+ system. This work gives an innovative strategy to improve the energy density, broadening the ideas of designing Li-rich materials with better performance.
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Affiliation(s)
- Shiyao Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ke Zhou
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Feng Zheng
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), and Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Haodong Liu
- Department of NanoEngineering, University of California San Diego, La Jolla, California 92093, United States
| | - Guiming Zhong
- Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
| | - Wenhua Zuo
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ningbo Xu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Gang Zhao
- School of Energy, Xiamen University, Xiamen 361005, China
| | - Mingzeng Luo
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jue Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chunyang Zhang
- Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Zhongru Zhang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shunqing Wu
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), and Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Yong Yang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- School of Energy, Xiamen University, Xiamen 361005, China
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Li Q, Yan S, Yang W. Interfacial properties in energy storage systems studied by soft x-ray absorption spectroscopy and resonant inelastic x-ray scattering. J Chem Phys 2020; 152:140901. [PMID: 32295356 DOI: 10.1063/5.0003311] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Interfacial behaviors and properties play critical roles in determining key practical parameters of electrochemical energy storage systems, such as lithium-ion and sodium-ion batteries. Soft x-ray spectroscopy features shallow penetration depth and demonstrates inherent surface sensitivity to characterize the interfacial behavior with elemental and chemical sensitivities. In this review, we present a brief survey of modern synchrotron-based soft x-ray spectroscopy of the interface in electrochemical energy storage systems. The technical focus includes core-level spectroscopy of conventional x-ray absorption spectroscopy and resonant inelastic x-ray scattering (RIXS). We show that while conventional techniques remain powerful for probing the chemical species on the surface, today's material research studies have triggered much more demanding chemical sensitivity that could only be offered by advanced techniques such as RIXS. Another direction in the field is the rapid development of various in situ/operando characterizations of complex electrochemical systems. Notably, the solid-state battery systems provide unique advantages for future studies of both the surface/interface and the bulk properties under operando conditions. We conclude with perspectives on the bright future of studying electrochemical systems through these advanced soft x-ray spectroscopic techniques.
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Affiliation(s)
- Qinghao Li
- Advanced Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
| | - Shishen Yan
- School of Physics, National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Wanli Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
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Wu J, Yang Y, Yang W. Advances in soft X-ray RIXS for studying redox reaction states in batteries. Dalton Trans 2020; 49:13519-13527. [DOI: 10.1039/d0dt01782e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-efficiency mapping of resonant inelastic X-ray scattering (mRIXS) for detecting and quantifying both cationic and anionic redox states in batteries.
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Affiliation(s)
- Jue Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Yong Yang
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Wanli Yang
- Advanced Light Source
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
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