改性LiMn_2O_4的高温电化学性能  

The Electrochemical Performance of Modified Spinel at Elevated Temperature

作　　者：蔡振平[1] 陈晓红[1] 卢世刚[1] 李明勋[1] 金维华[1] 

机构地区：[1]北京有色金属研究总院矿物资源与冶金材料矿究所,北京100088

出　　处：《电化学》2004年第4期446-451,共6页Journal of Electrochemistry

基　　金：国家自然科学基金(50074012)资助

摘　　要：　采用高温固相反应法制备改性的LiMn2O4锂离子电池正极材料.利用SEM、XRD等方法表征产物的结构特性.结果表明:所得产物均具尖晶石型LiMn2O4结构,该样品经Li2CO3改性后用作锂离子电池正极,于常温和高温下的循环性能均得到明显改善.The modified LiMn_2O_4 cathode materials for lithium ion batteries have been synthesized by solid-state reaction. The crystal structure and electrochemical performance of products have been investigated by SEM、XRD and electrochemical measurements. The XRD analysis indicated that all the synthesized products possess Fd3m spinel LiMn_2O_4 structure. Those modified LiMn_2O_4 materials showed improved cycling capacity over pure spinels at high temperature and room temperature.

关 键 词：尖晶石型LIMN2O4 锂离子电池 高温电化学性能 正极材料 循环性能 高温固相反应法 XRD 改性 制备 表征 

分 类 号：TM910[电气工程—电力电子与电力传动]