超声辅助还原法制备尖晶石锰酸锂研究  

Preperation of nanometer spinel LiMn_2O_4 by hydrothermal method with ultrasonic oscillator

作　　者：王曼丽[1] 林永[1] 江忠远[1] 罗玉航 袁加野 

机构地区：[1]遵义师范学院化学化工学院,贵州遵义563002

出　　处：《电源技术》2015年第10期2090-2092,共3页Chinese Journal of Power Sources

基　　金：贵州省科技厅联合基金项目(黔科合J字LKZS[2012]3号);遵义市科技局基金项目(遵市科合社字[2011]2号)

摘　　要：采用超声辅助水热还原法制备尖晶石锰酸锂,并研究不同水热反应时间对锰酸锂性能的影响。采用XRD、SEM对所得样品的晶体结构、微观形貌进行了表征。电化学性能采用循环伏安、交流阻抗和恒流充放电进行检测。结果表明:水热法合成的LiMn2O4颗粒结构整体分布较为均匀、稳定。水热时间12h的尖晶石LiMn2O4嵌锂比容量最高可达137.6mAh/g,且循环性能良好。The spinel LiMn2O4 were prepared by using hydrothermal method combining with ultrasonic oscillator, and then treated by heat-treatment. The obtained powders were characterized by XRD and SEM. The electrochemical performances of samples were investigated by cyclic voltammetry, AC impedance and charge/discharge test. The results show that LiMn2O4 particle structure overall distribution is more uniform and stability by using hydrothermal method combining. The reversible specific discharge capacity of LiMn2O4 prepared by hydrothermal method was increased to 137.6 m Ah/g with fairly stable cycleability.

关 键 词：锰酸锂 超声辅助 水热合成法 

分 类 号：TM912[电气工程—电力电子与电力传动]