摘要
导电剂使电池有良好的倍率放电性能,是锂离子电池不可或缺的关键材料之一,研究以常规导电炭黑做导电基底,探究添加导电石墨、碳纳米管和活性碳对LMO电池性能的影响.结果表明:在常规导电基底中加入50%的导电石墨,33.3%的碳纳米管,16.7%的活性炭的复合导电剂比常规导电剂组的实际比容量高出12 mAh/g;碳纳米管对实际比容量指标的影响最大,其次是活性炭,再次是导电石墨;循环次数在30次时,加入复合导电剂的电池容量保持率在90%以上,而加入常规导电剂的电池容量保持率下降到71%,不加任何导电剂的电池容量保持率只有55%.
Conductive agent makes good battery discharge performance and is one of the indispensable key materials of lithium ion battery. Based on the conventional conductive carbon black as conductive substrate, the effect of conductive graphite, carbon nanotubes and active carbon on the performance of LMO battery has been studied. The results show that the optimal ratio of the composite conductive agent group has higher capacity of 12mAhVg than that in the conventional conductive agent group ; carbon nanotube has the most effect on capacity index, followed by activated carbon and conductive graphite ; when cycle time is 30, capacity retention rate of the battery with composite conductive agent is above 90%, and that of the batteries with conventional conductive agent and without any conductive agent drops to 71% and 55% respectively.
出处
《广西工学院学报》
CAS
2013年第3期58-62,共5页
Journal of Guangxi University of Technology
基金
广西重点实验室建设项目(13-051-38)
广西重点实验室开放基金项目(2012KFMS04)资助
关键词
复合导电剂
锂电池
正交实验设计
电池性能
循环寿命
composite conductive agent
Lithium battery
orthogonal experimental design
battery performance
cycle life
