低温共熔盐法制备LiNi_(0.8)Co_(0.2)O_2的结构与电化学性能  

Synthesis and electrochemical properties of LiNi_(0.8)Co_(0.2)O_2 prepared by the eutectic molten-salt method

作　　者：汤宏伟[1] 魏文强[1] 常照荣[1] 王全坤[1] 代冬梅[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《功能材料》2010年第2期193-196,199,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20671031)

摘　　要：低温共熔盐0.434LiNO3-0.266LiOH·H2O-0.3CH3COOLi·2H2O在80～90℃范围实现很好的熔融态。采用这种低温共熔盐制备出了锂离子电池正极材料LiNi0.8Co0.2O2,XRD检测显示材料结晶度高,具有规整的层状α-NaFeO2结构,SEM扫描显示样品形貌均一,颗粒大小均匀。充放电测试表明,材料具有良好的电化学性能,在2.8～4.3V电压范围0.2C首次放电比容量为174.1mAh/g,循环20次后容量保留95%。The cathode material LiNi0.8Co0.2O2 for lithium-ion battery is prepared using the eutectic molten salt 0.434LiNO3-0.266LiOH·H2O-0.3CH3COOLi·2H2O,which is in well molting state at 80-90℃.The well-layered α-NaFeO2 structure and regular morphology are confirmed by X-ray diffraction（XRD） and scanning electronmicroscopy（SEM）.Electrochemical studies indicate the first discharge of this sample is 174.1mAh/g at a 0.2C between 2.8-4.3V and the discharge capacity retention of 95% after 20cycles.

关 键 词：锂离子电池 低温共熔盐 正极材料 LINI0.8CO0.2O2 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]