富锂锰基层状正极材料的发展现状

摘要

The structure,mechanism of Li-excess with Mn-base layered cathode material xLi2 MnO3 ·(1-x)LiMO2 are discussed.The progress of synthesis and modification are also summarized.Compared with LiCoO2 and Li[Ni 1 /3 Mn1 /3 Co1 /3 ]O2 ,it performs lower cost,better safety and more friendliness to environment.But it doesn't do well in the first discharge efficiency,rate capability,low temperature and tap density.In addition to the research status and current problems,the developmental direction in the future is pointed out.%介绍了富锂锰基层状系列正极材料 xLi2 MnO3·（1-x）LiMO2的结构及机理、合成及改性进展，与 LiCoO2、Li[Ni 1／3 Mn1／3 Co1／3]O2等常见材料相比，价格更低、安全性更好、对环境更为友好。但仍存在首次充放电效率低、倍率性能较差、低温性能差、振实密度低等不足之处。在揭示该材料的研究现状和亟待解决的问题基础上，更明确了今后的发展方向。