摘要
用正交实验,通过XRD、SEM及电化学性能分析,优化了锂离子电池正极材料LiMn2O4的高温固相合成工艺。对产物性能影响的顺序为:锂锰物质的量比>烧结温度>恒温时间。在n(Li)∶n(Mn)=0.525∶1.000、烧结温度为820℃及恒温时间为14 h时,合成的LiMn2O4的综合性能最好,尖晶石结构和表面形貌良好,1C首次放电比容量为119.0 mAh/g,第50次循环的容量保持率为95.8%。
Using the orthogonal experiment,the high-temperature solid-phase synthesizing process for Li-ion battery cathode material LiMn2O4 was optimized by XRD,SEM and electrochemical performance analyses.The order of influencing the performance of the products was：molar ratio of lithium to manganesesintering temperaturethermostatic time.The LiMn2O4 synthesized at n（Li）∶n（Mn）=0.525∶1.000,820 ℃ of sintering temperature and 14 h of thermostatic time had the best comprehensive performance.It had fine spinel structure and surface morphology,the initial specific discharge capacity at 1 C was 119.0 mAh/g,the capacity retention rate at the 50th cycle was 95.8%.
出处
《电池》
CAS
CSCD
北大核心
2010年第1期27-29,共3页
Battery Bimonthly
关键词
正极材料
LIMN2O4
高温固相合成
优化
cathode material
LiMn2O4
high-temperature solid-phase synthesizing
optimization
