锂离子电池高镍正极材料中镍锂混排研究进展

Research progress of mixed nickel and lithium in high nickel cathode materials for lithium ion batteries

锂离子电池高镍正极材料因具有高能量密度已经被广泛研究,并且广泛应用于新能源汽车及储能器件。镍锂混排是高镍正极材料中常见的物理现象,能对高镍锂离子电池的放电比容量、倍率性能、循环性能、结构稳定性能及安全性能产生重要影响。从镍锂混排的定义、形成机理、检测方法及对高镍锂电池正极材料的影响进行了分析与讨论。

High nickel cathode materials for lithium ion batteries have been widely studied due to their high energy density,and are widely used in new energy vehicles and energy storage devices.Mixed nickel and lithium is a common physical phenomenon in high nickel cathode materials,which can have an important impact on discharge capacity,rate performance,cycle performance,structural stability and safety performance of high nickel lithium ion batteries.In this paper,the definition,formation mechanism,detection method of mixed nickel and lithium and its influence on the cathode material of high nickel lithium battery are analyzed and discussed.