尖晶石LiMn_2O_4改性的研究与进展  

Review on the Study and Progress of Improving Li-Mn Spinel LiMn_2O_4 by Surface Modification

作　　者：万福成[1] 田建坤[1] 张海朗 

机构地区：[1]信阳职业技术学院,河南信阳464000 [2]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《化学世界》2007年第11期697-701,共5页Chemical World

摘　　要：LiMn2O4作为未来锂离子电池正极材料的基材,一直是人们研究的热点。但它在循环过程中存在着容量衰减的问题,是制约它商品化的最重要因素。介绍了几种容量衰减机理:Mn的溶解,Jahn-Teller效应以及电解液的分解。表面修饰是抑制尖晶石LiMn2O4容量衰减的有效方法。详细阐述了近年来有关尖晶石LiMn2O4表面改性的研究与最新进展。Lithium manganate spinel is becoming the basic cathode material of Li-ion cells in thefuture. The problem is that the capacity is degraded in cycling, which restricts it to be commerecialized. The capacity fade can be ascribed to manganese dissolution, Jahn-Teller effect and electrolyte decomposition. Surface modification is an important way to improve the stability of spinel LiMn2O4, So, the researches on degradation mechanism and surface modification of lithium manganese oxide spinel in recent years are reviewed.

关 键 词：锰酸锂 研究进展 包覆 表面改姓 

分 类 号：TQ137.12[化学工程—无机化工]