LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2正极材料高温循环性能研究  

Study on cyclic performance of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material at high temperature

作　　者：张胜利[1] 马利华[1] 杨胜杰[1] 宋延华[1] 李良玉[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《电池工业》2009年第6期369-372,共4页Chinese Battery Industry

摘　　要：采用溶胶-凝胶法合成LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2正极材料,对该材料的结构和电化学性能进行了测试。研究结果表明:LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2材料在20℃、45℃、65℃条件下首次放电容量分别为138.2mAh/g、129.7 mAh/g、97.75 mAh/g,20周循环后容量保持率分别为94.5%、92.2%、87.8%,表明该材料具有优越的循环性能和高温稳定性能。Cathode material LiNi1/3Co1/3Mn1/3O2 was synthesized by a sol-gel method and electrochemical properties were tested.The results showed that its initial discharge specific capacity was 138.2 mAh/g、129.7 mAh/g、97.75 mAh/g respectively at 20℃、45℃、65℃.After 20 cycles,its columbic efficiency was 94.5%、92.2%、87.8%,respectively.It showed that the as-prepared material had excellent cyclic performance and good stable property at high temperature.

关 键 词：锂离子电池 正极材料 LINI1/3CO1/3MN1/3O2 溶胶-凝胶法 高温循环性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]