焙烧温度对锰酸锂结构及电化学性能影响研究  

Effect of calcination temperature on structure and electrochemical properties of LiMn2O4

作　　者：张晓波[1] 刘红光[1] 叶学海[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：《无机盐工业》2012年第7期31-32,46,共3页Inorganic Chemicals Industry

摘　　要：采用高温固相法在不同温度下合成了正极材料锰酸锂。采用X射线衍射(XRD)、扫描电镜(SEM)和恒流充放电测试研究了不同温度下合成的锰酸锂样品的结构、形貌及电化学性能。结果表明:在850℃时合成的样品具有最佳的电化学性能,在0.1 C(1 C=148 mA.h/g)的充放电倍率下,首次放电比容量为120.7 mA.h/g,经过20次充放电循环后容量保持率为95.2%。LiMn2O4 cathode materials were synthesized by high-temperature solid-state reaction method at different temperatures.Structure,morphology, and electrochemical properties of the samples synthesized at different temperatures were tested by X-ray diffraction （XRD）,scanning electronmicroscopy （SEM）,and galvanostatic charge-discharge test.Results showed that LiMn204 cathode material synthesized at 850 ℃ had optimal electrochemical properties and exhibited a initial discharge capacity of 120.7 mA·h/g at 0.1 C （1 C =148 mA· h/g）rate and the capacity retention rate was 95.2% after 20 charge-discharge cycles.

关 键 词：LIMN2O4 尖晶石 焙烧温度 高温固相法 电化学性能 

分 类 号：TQ131.11[化学工程—无机化工]