摘要
尖晶石型锰酸锂以成本低廉、资源丰富和良好的安全性能,成为动力锂离子电池的理想正极材料。但尖晶石LiMn2O4高温循环性能差限制了其应用。阐述了尖晶石LiMn2O4容量衰减的机理;详细介绍了国内外在LiMn2O4正极材料体相掺杂和表面包覆改性的研究进展,并对体相掺杂和表面包覆改性LiMn2O4正极材料电化学性能提高的机理进行了讨论。最后对尖晶石LiMn2O4正极材料今后的发展方向进行了展望。
Abstract： Spinel LiMn2O4 has been considered as a potential cathode material for power Li-ion batteries because of its low cost, rich resource and high safety. However, spinel LiMn2O4 shows poor cycling performance at elevated temperatures ,which restricts its application. In this paper, the capacity degradation mechanism of spinel LiMn2O4 is introduced. The progress in ion substitution and surface coating treatment for spinel LiMn2O4 at home and abroad are described in detail. The reason of enhanced electrochemical performance of ion substitution and surface treatment for spinel LiMn2O4 are discussed as well. Finally, some future directions for spinel LiMn2O4 are pointed out.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第1期14-18,共5页
Modern Chemical Industry
基金
辽宁省博士启动基金项目(20111061)
关键词
锂离子电池
正极材料
尖晶石
掺杂
包覆
lithium-ion batteries
cathode material
spinel
ion substitution
surface coating treatment
