水溶性羧甲基壳聚糖粘结剂在锂离子电池石墨负极中的应用  

Application of water-soluble carboxymethyl chitosan as binder in graphite anode of lithium-ion battery

作　　者：梁波[1,2] 陈栩[2] 张帅 LIANG Bo;CHEN Xu;ZHANG Shuai(State Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science ＆ Technology,Changsha 410114,China;School of Automobile and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学公路养护技术国家工程实验室,长沙410114 [2]长沙理工大学汽车与机械工程学院,长沙410114

出　　处：《中国有色金属学报》2018年第7期1379-1386,共8页The Chinese Journal of Nonferrous Metals

基　　金：公路养护技术国家工程实验室开放基金资助项目(kfj150101)~~

摘　　要：将水溶性羧甲基壳聚糖(C-Cs)作为石墨负极粘结剂,通过测试首次充放电性能、循环性能和倍率性能以及循环前后形貌的变化,并与聚偏氟乙烯(PVDF)作为石墨负极粘结剂的性能进行了比较。结果表明:使用7%(质量分数)C-Cs粘结剂的石墨负极在0.5C(1C可逆比容量为372 mA·h/g)倍率下循环400个周期后,可逆比容量为312mA·h/g,10C倍率充放电测试下的可逆比容量为252 mA·h/g;经过100次循环之后,使用10%C-Cs粘结剂的石墨负极与使用PVDF为粘结剂的石墨负极相比,其交流阻抗有所降低,有助于电极比容量的提高和循环性能的改善。The water-soluble carboxymethyl chitosan （C-Cs） was used as binder for graphite anode in lifl^ium-ion batteries. The electrochemical performance of graphite anode using C-Cs as binder was studied by rate performance, cycling stability and the morphology of the graphite anode. The discharge capacity of graphite anodes with 7% C-Cs binder maintains 312 mA.h/g over 400 cycles at 0.5C （1C： 372 mA/g） and exhibits an excellent capacity 252 mA.h/g at a high-rate of 10C. The resistance of the graphite anode using 10%C-Cs as binder is reduced compared with that of 10% PVDF after 100 cycles, which helps to improve the specific capacitance and cycle performance.

关 键 词：锂离子电池 石墨负极 羧甲基壳聚糖 水溶性粘结剂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]