镍钴铝酸锂正极材料改性研究进展及展望

Progress and prospect in modification on nickel-cobalt lithium aluminate cathode material for lithium ion batteries

综述了锂离子电池镍钴铝三元正极材料LiNixCoyAl1-x-yO2(NCA,x≥0.8)存在的不可逆容量大、循环性能差等问题及其性能优化改性技术的研究进展,从表面包覆和体相掺杂两个方面对近年来国内外NCA正极材料的电化学性能改善研究进行系统性总结,分析了各类包覆物以及掺杂元素的作用机理,并对NCA正极材料的未来研究方向进行了展望。

The problems and progress of the ternary nickel-cobalt lithium aluminate LiNixCoyAl1-x-yO2(NCA,x≥0.8) cathode materials of lithium ion battery is reviewed from large irreversible capacity and poor cycle performance,and systematically summarizes the modified techniques of the aspects of surface coating and bulk doping in recent years.Then the paper analyzes the advantages and mechanism of action of various types of coatings and doping elements.Furthermore,the future research direction of NCA cathode materials is prospected.