锂离子电池正极材料的发展

Development in cathode materials for lithium ion battery

近几年来有关锂离子电池正极材料的研究很多，大部分集中在氧化物上。对锂镍氧化物、锂钴氧化物等常用锂离子电池正极材料作了一些简单概述，并对锂锰氧化物及其系列产物的制备和电化学性能作了重点阐述。目前锂锰氧化物的制备以固态煅烧和液相合成为主，通过添加过量的锂或其它金属离子可改善锂锰氧化物的循环性能，但同时不可避免地要牺牲部分初始容量。在高温条件下锂锰氧化物的某些电化学性能大大降低，这些不利因素都有待于进一步改进。

In recent years, much attention has been paid to cathode material for lithium ion battery. In this paper, the preparation process and electrochemical characteristics of LiNiO 2, LiCoO 2, Li Mn oxides and some metal oxides are sketched out. And the solid and liquid synthetic methods of Li Mn oxides have been introduced. Meanwhile, some vital problems of spinel LiMn 2O 4, such as the capacity fading at high temperature, are also discussed.