锆掺杂对正极材料LiMn_2O_4性能的影响  

Effects of Doping Element Zirconum on Performance of LiMn_2O_4 Cathode Material

作　　者：张晓波[1] 叶学海[1] 刘红光[1] 付春明[1] 于晓微[1] 张春丽[1] 肖彩英[1] 夏继平[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《广州化工》2012年第6期77-79,110,共4页GuangZhou Chemical Industry

摘　　要：采用溶胶-凝胶法在合成尖晶石型锰酸锂的过程当中掺入不同比例的锆元素,采用SEM观察其晶体结构均完整,通过XRD谱图可以看出均具有尖晶石结构。通过对样品进行充放电测试,结果表明:当掺杂剂的量(X=0.1),即化学式LiZr0.1Mn1.9O4具有良好的高温(55℃)循环性能,在高温(55℃)和1 C倍率充放电下,循环50次后容量保持率为90%。In the process of preparing LiMn2O4 with spinel structure by gel-method,different proportions of Zirconum element were mixed.The crystal structure observed by SEM was complete and spinel structure by XRD.By the charge-discharge test of samples,the result showed when the amount of dopant was x=0.1,LiZr0.1Mn1.9O4 had well cycle performance at high temperature（55 ℃）.At high temperature（55 ℃） and 1C rate,the capacity retaining was 90% after 50 cycles.

关 键 词：锰酸锂 掺杂改性 高温循环 电性能 

分 类 号：TQ152[化学工程—电化学工业]