Recent development of Li-rich manganese cathode material for Li-ion batteries

• Main Authors: ZHANG Pan-pan, HUANG Hui, HE Ya-peng, LI Xiao-bo, GUO Zhong-cheng
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2021-03-01
• Series: Journal of Materials Engineering
• Subjects: li-rich manganese cathode material; bulk doping; coating modification; structural optimi-zation design
• Online Access: http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000292
• ISSN: 1001-4381; 1001-4381

Li-rich manganese cathode material(LMCM)is considered to be the most promising cathode material for the next generation of Li-ion battery due to the advantages of high specific capacity (>250 mAh·g^-1) and low cost. However, due to factors such as irreversible structural transformation of the cathode material during cycling, these materials suffer from many problems including high first irreversible capacity loss, energy decay, poor rate performance and voltage decay. The problems of LMCM can be partially improved by lattice doping, coating modification and structural optimization design, and the electrochemical performance as a cathode material for Li-ion batteries can be improved. This paper focuses on the primary problems and modification research work of LMCM. The causes of the problems existing in LMCM were firstly analysed. Then, the current research status of the main modification methods was elaborated. Meanwhile, the advantages and disadvantages of each modification method were discussed while the future research directions were pointed out. The current industrialization process and major challenges of LMCM materials were also discussed.Due to LMCM’s problems and the slow development of supporting materials,it is only produced in small batches in a few enterprises at present.