富镍三元正极材料的改性研究进展

富镍三元正极材料具有高能量密度和低成本等优点，是一种有前途的正极材料。然而，富镍三元正极材料存在容量衰减和热稳定性差等问题。综述了富镍三元正极材料的晶体结构特性，对三元正极材料存在的问题进行概述；总结了形貌调控、结构设计、离子掺杂和表面包覆等提升正极材料电化学性能的改性方法，重点总结了氟离子掺杂和稀土元素掺杂以及不同合成方法包覆SiO₂对电化学性能的影响；对未来的发展进行了总结和展望。

Research progress on modification of nickel-rich ternary cathode materials

Nickel-rich ternary cathode material is considered as a promising electrode material because of its high energy density and low cost. However, nickel-rich ternary cathode materials also have problems such as capacity attenuation and poor thermal stability. Firstly, the crystal structure characteristics of nickel rich ternary cathode materials are discussed, and the existing problems of ternary cathode materials are briefly summarized. Secondly, the modification methods to improve the electrochemical properties of cathode materials such as morphology control, structure design, doping and coating are reviewed. The effects of fluorine doping and rare-earth element doping, as well as different synthetic methods of coating silica on the electrochemical properties are summarized. Finally, the future development in this field is summarized and prospected.