正极材料LiNi_(0.5)Mn_(1.5)O_4的制备及电化学性能  

Preparation and Electrochemical Performance of LiNi_(0.5)Mn_(1.5)O_4 as the Cathode Material

作　　者：聂晓燕[1] 程琥[1] 

机构地区：[1]贵州师范大学化学与材料科学学院,贵州省功能材料化学重点实验室,贵州贵阳550001

出　　处：《广东化工》2016年第6期21-23,共3页Guangdong Chemical Industry

基　　金：贵州省科学技术基金(黔科合J字[2012]2284)

摘　　要：以Mn(CH_3COO)_2、Ni(CH_3COO)_2和CH_3COOLi为原料,采用流变相法制备正极材料LiNi_(0.5)Mn_(1.5)O_4,对烧结温度、时间、以及配锂量等合成条件进行了优化。采用X射线衍射(XRD)、扫描电子显微镜(SEM)和恒流充放电仪对材料的物相、形貌和电化学性能进行了表征。结果表明,在锂源过量5%,850℃煅烧6 h合成的材料具有最好的电化学性能,以0.1 C倍率下放电比容量为127.1 m Ah/g,50次循环后,容量保持率为95.4%。Cathode material LiNi_（0.5）Mn_（1.5）O_4 was prepared by rheological method with Mn（CH_3COO）_2·4H_2O, Ni（CH_3COO）_2·4H_2O and CH_3COOLi·2H_2O as raw materials, optimization of the synthetic process of the calcining temperature, sintering time and lithium content. Material phase, morphology and electrochemical properties characterized by X ray diffraction（XRD）, Scanning Electronic Microscopy（SEM）and charge-discharge tests. The result showed that the material with 5 % excess of Lithium source calcined at 850 ℃, 6 h had the best electrochemical performance, Its specific discharge capacity was 127.1 m Ah/g when 0.1 C charge-discharge, and after 50 cycles the capacity retention was 95.4 %.

关 键 词：锂离子电池 正极材料 流变相法 LINI0.5MN1.5O4 

分 类 号：TM912.9[电气工程—电力电子与电力传动]