LiCoO_2改性LiMn_2O_4的制备及性能的研究  

Study on preparation and performance of LiMn_2O_4 modified by LiCoO_2

作　　者：蔡振平[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《电池》2007年第5期351-353,共3页Battery Bimonthly

摘　　要：采用高温固相法制备了改性LiMn2O4锂离子电池正极材料。利用TG-DSC、XRD、EDS和充放电测试等研究了LiCoO2的掺入对改性LiMn2O4的形成过程、结构及电化学性能的影响。结果表明:在850℃下热处理8 h,能够形成完整的尖晶石型LiMn2O4结构。当n(LiCoO2)∶n(LiMn2O4)为0.3时,10次循环后(55℃),改性LiMn2O4的容量保持率由LiMn2O4的89.9%提高到99.0%。The modified LiMn2O4 cathode materials for Li-ion battery were synthesized by solid-state reaction at high temperature. The effects of doping LiCoO2 on the formation process, structure and electrochemical performance of the modified LiMn2O4 were studied by TG-DSC, XRD, EDS and charge-discharge tests. The results showed that an integrated spinel phase LiMn2O4 was obtained by heat treatment at 850 ℃ for 8 h. The capacity retention rate of the modified LiMn2O4 was improved from 89.9% （LiMn2O4） to 99.0% after 10 cycles at 55 ℃ when n（LiCoO2） ： n（LiMn2O4） was 0.3.

关 键 词：锂离子电池 正极材料 掺杂 

分 类 号：TM912[电气工程—电力电子与电力传动]