文献类型：期刊文献

中文题名：科琴黑(KB)导电剂在LiFePO_4电池中的应用研究

英文题名：Application research of a cathode prepared with ketjen black as conductive additives in LiFePO_4 batteries

作者：张洁[1];徐云龙[1];宋作玉[1];吴秋芳[1]

机构：[1]华东理工大学国家超细粉末工程研究中心,上海200237

年份：2011

卷号：42

期号：5

起止页码：858

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;EI(收录号：20112514079079);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国际合作基金资助项目(08230705600);上海市纳米科技专项资助项目(0852nm02300)

语种：中文

中文关键词：导电剂;KB;分散性;LiFePO4;电池

外文关键词：conductive additives; KB; dispersivity; LiFePO4; batteries

摘要：采用扫描电子显微镜(SEM)、恒电流充放电测试、电化学交流阻抗(EIS)等技术方法,研究了KB添加量以及KB在LiFePO4正极浆料中分散方式对电极片涂层附着力及其电池充放电、循环性能的影响,对比了KB和乙炔黑(AB)导电剂LiFePO4电池的电化学性能。研究结果表明,高速剪切可以有效解决KB在LiFe-PO4电极浆料制备过程中易于团聚的问题,改善电池浆料分散性,提高正极片涂层附着力;KB添加量过高过低都会对电池性能造成影响,当KB的添加量为3%时,1C倍率下的放电比容量高达约141mAh/g。
SEM,constant current charge-discharge test,EIS were used to evaluate the influence of the amount of KB and the way of KB was dispersed in slurry on the adhesive force of cathode plates,and to evaluate the charge-discharge properties and cycle performance of batteries,and compared the electrochemical behavior of LiFePO4 batteries prepared with ketjen black and acetylene black as conductive additives.The results indicate that high speed shear can solve the agglomeration of the battery slurry,improve the dispersion state of the battery slurry,then improve the adhesive force of cathode plates.LiFePO4 with 3% KB adding has the best rate performances with a discharge capacity of 141mAh/g at 1C rate.