锂离子电池正极材料LiMn_2O_4的改性研究进展

Research Progress on Modification of LiMn_2O_4 Cathode Material for Li-ion Batteries

尖晶石型LiMn2O4由于其合成工艺条件简单、环境友好、原料价格低等诸多优点被认为是最具有应用前景的锂离子电池正材料,但其在较高的温度下循环稳定性能较差,容量衰减快,从而严重影响了其商业化应用。文章阐述了科研人员为了改善材料的容量衰减快、高温性能及大流充放电性能而采用的离子掺杂和表面包覆改性的研究进展。

Spinel LiMn2O4 is one of the most promising cathode material of Li-ion batteries because of its low cost, abundant raw material, simple process and no pollution to environment, etc. The capacity degrades in cycling which restricts it to be commercialized. Doping and surface modification are the effectively ways to restrain the capacity loss in cycling. In the paper, we report the research progress to improve the ability of the capacity degrades in cycling, high temperature performance and large current discharge performance.