LiCoO_2对LiMn_(2-x)MxO_4正极材料的混合改性研究  

Advantage of Blending LiCoO_2 into LiMn_(2-x)M_xO_4 Cathode

作　　者：唐致远[1] 邓艳波[1] 张娜[1] 管道安[1] 

机构地区：[1]天津大学化工学院应用化学系,天津300072

出　　处：《化学通报》2006年第4期287-289,共3页Chemistry

基　　金：国家自然科学基金资助项目(20273047)

摘　　要：采用机械混合层状LiCoO2和经过多元掺杂改性后尖晶石型LiMn2-xMxO4(M=Co+Cr+La,x=nCo+nCr+nLa,且0<x<0.10),按摩尔配比LiMn2-xMxO4/LiCoO2=100/0、95/5、90/10、85/15作为正极活性物质制成实验电池,测各种比例下电池的充放电曲线。结果表明,掺入LiCoO2的电池电化学性能明显优于未掺入的,LiMn2-xMxO4与LiCoO2摩尔比为90/10时,电池的初始放电容量最高,且有较好的循环稳定性。The layered LiCoO2 and the spinel LiMn2-xMxO4 （ M = Co ＋ Cr ＋ La, x = nCo ＋ nCr ＋ nLa, and 0 〈 x 〈 0.10） were blended in different proportions, and the experimental coin batteries using the composite material （the molar ratio LiMn2-xMxO4/LiCoO2 = 100/0;95/5,90/10,85/15） as the active materials of the cathode were assembled. The results showed that the composite cathode material exhibited more excellent electrochemical characteristics compared with LiMn2-x MxO4 （M = Co ＋ Cr ＋ La）, and when the proportion is 90/10, the initial discharge capacity is the highest and the cyclic performance is excellent.

关 键 词：锂离子动力电池 正极材料 LIMN2O4 

分 类 号：TM912[电气工程—电力电子与电力传动]