高温固相法制备高温锂电池用LiCr_3O_8  

Preparing LiCr_3O_8 for lithium battery by high temperature solid state method

作　　者：苗会敏 吴铸[1] 杜俊霖[1] 夏保佳[1] MIAO Hui-min WU Zhu DU Jun-lin XIA Bao-jia(Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China University of Chinese Academy of Sciences, Beijing 100039, China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]中国科学院大学,北京100039

出　　处：《电池》2016年第6期298-301,共4页Battery Bimonthly

基　　金：国家自然科学基金(21473234);上海市国内合作项目(16595800700)

摘　　要：分析不同烧结温度下制备的亚铬酸锂（LiCr_3O_8）的高温热稳定性及与低共熔硝酸盐的化学相容性;测试与Li-Mg-B合金组成的电池在不同温度和电流密度下的电化学性能。LiCr_3O_8的高温热稳定性以及与低共熔硝酸盐的高温相容性良好,有望用作高温锂电池正极材料;提高放电温度可提高材料的反应活性,但会加剧电池的自放电。在350℃下烧结制备的样品,在放电过程中表现出最低的电池内阻,更适合于200-300℃范围内工作的锂电池正极材料。The high temperature thermal stability of chromic acid lithium（ LiCr3O8 ）prepared at different sintering temperatures and its chemical compatibility with the eutectic nitrate were analyzed, the electrochemical performance at different temperatures and current density of the battery composed of LiCr30s and Li-Mg-B alloy was tested. The high temperature thermal stability of LiCr308 obtained at all temperatures and the chemical compatibility with molten nitrate salts were good and they were suitable for high temperature lithium battery cathode materials. Raising the discharge temperature enhanced the reactivity, but increased the self- discharge of the cell. LiCr308 prepared at 350 ℃ sintering showed the lowest internal resistance of the battery during discharge and suitable for the high temperature lithium battery cathode material working in the range of 200 - 300 ℃.

关 键 词：锂电池 正极材料 热稳定性 化学相容性 亚铬酸锂(LiCr3O8) 

分 类 号：TM912[电气工程—电力电子与电力传动]