Recent Advances of Mn‐Rich LiFe1‐yMnyPO4 (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries |
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| Authors: | Yuanfu Deng Chunxiang Yang Kaixiang Zou Xusong Qin Zhenxia Zhao Guohua Chen |
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| Affiliation: | 1. The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China;2. Center for Green Products and Processing Technologies, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, China;3. Guangxi Colleges and Universities Key Laboratory of New Technology and Application in Resource Chemical Engineering, Guangxi University, Nanning, China;4. Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Hong Kong, China;5. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | LiMnPO4 (LMP) is one of the most potential candidates for high energy density (≈700 W h kg?1) lithium ion batteries (LIBs). However, the intrinsically low electronic conductivity and lithium ion diffusion coefficient of LMP result in its low performance. To overcome these challenges, it is an effective approach to prepare nanometer‐sized Fe‐doping LMP (LFMP) materials through optimization of the preparation routes. Moreover, surface coating can improve the ionic and electronic conductivity, and decrease the interfacial side reactions between the nanometer particles and electrolyte. Thus, a uniform surface coating will lead to a significant enhancement of the electrochemical performance of LFMP. Currently, considerable efforts have been devoted to improving the electrochemical performance of LiFe1‐y Mny PO4 (0.5 ≤ y < 1.0) and some important progresses have been achieved. Here, a general overview of the structural features, typical electrochemical behavior, delithiation/lithiation mechanisms, and thermodynamic properties of LiFe1‐y Mny PO4‐based materials is presented. The recent developments achieved in improvement of the electrochemical performances of LiFe1‐y Mny PO4‐based materials are summarized, including selecting the synthetic methods, nanostructuring, surface coating, optimizing Fe/Mn ratios and particle morphologies, cation/anion doping, and rational designing of LFMP‐based full cells. Finally, the critical issues at present and future development of LiFe1‐y Mny PO4‐based materials are discussed. |
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| Keywords: | cathode materials Fe‐doped lithium manganese phosphate high energy density lithium‐ion batteries olivine |
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