尖晶石型LiMn2O4合成新工艺及改性研究  

Research on a New Method and Cation Doping Modification of Spinel LiMn2O4

作　　者：徐茂[1] 胡劲[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《中国材料科技与设备》2009年第1期38-41,共4页Chinese Materials Science Technology & Equipment

摘　　要：本文采用一种新方法——溶盐浸渍合成法制备出了尖晶石型LiMn2O4锂离子电池正极材料。“溶盐浸渍工艺”具有sol-gel等液相合成法成分易于混合均匀、合成时间短的优点，同时兼有固相合成法工艺流程短、操作简单的特点。利用Al、Co两种改性元素的协同效应和叠加效应制备了富锂二元阳离子掺杂正极材料Li1.03Co0.05Al0.03Mn，1.92O4，其初始放电容量为117．5mAh／g，20次循环的容量损失仅为9．5％，300次循环的容量损失率为15．1％。The spinel： LiMn2 O4 cathode material for lithium-ion battery is prepared by a new method-solution impregnation. The new method has the same excellences as sol-gel method, such as homogenous, short synthesis time etc. At the same time, it also has the characteristics, for example succinct craftwork and easy operation. Utilizing the cooperative effect and additive effect of Co, Al duality doping modification, the rich lithium cathode material Li1. 03 Co0. 05 Al0. 03 Mn1. 92O4 is prepared. The first specific capacity is 117.5mAh/g, and capacity loss is 9.5% for 20 cycles. Its capacity loss is 15.1% after 300 cycles.

关 键 词：LIMN2O4 正极材料 阳离子掺杂 

分 类 号：TF124[冶金工程—粉末冶金]