Li-rich Oxides Cathode Materials: Towards a New Generation of Lithium-ion Batteries with High Energy Density
YANG Shifeng1,2, REN Wenfeng1, CHEN Jian1
1 Advanced Rechargeable Battery Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023; 2 University of Chinese Academy of Sciences, Beijing 100049
Abstract: Li-rich oxides xLi2 MnO3·(1-x)LiMO2(M=Co, Ni or Mn) with specific capacity of 250—300 mAh/g are pro-mising candidates cathode materials for high specific energy density lithium-ion batteries. In this review, the crystal structure, lithium insertion/extraction mechanism, and structural transformation of Li-rich oxide during the charge-discharge processes are introduced. The issues encountered by the material including the large initial irreversible capacity, fast voltage and capacity fading, as well as the inferior rate capability and low-temperature performance are also illustrated and discussed. Then, the synthesis and modification methods including surface coating, ion doping, morphology and crystal plane control, as well as the fabrication of lamellar phase-spinel intergrown structure for the materials are described. At last, from the view of both basic and applied research, the prospects of future development for Li-rich oxides cathode material are proposed.
杨时峰, 任文锋, 陈剑. 新一代高比能量锂离子电池富锂氧化物正极材料的研究进展*[J]. 《材料导报》期刊社, 2017, 31(11): 1-10.
YANG Shifeng, REN Wenfeng, CHEN Jian. Li-rich Oxides Cathode Materials: Towards a New Generation of Lithium-ion Batteries with High Energy Density. Materials Reports, 2017, 31(11): 1-10.
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