4A分子筛对电解液的改善应用  

Application of zeolite 4A to improve electrolyte

作　　者：王晶[1] 庄全超[1] 徐守冬[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《电池》2013年第1期12-14,共3页Battery Bimonthly

基　　金：中央高校基本科研业务费专项资金(2010LKHX03);中国矿业大学科技攀登计划(ON090237)

摘　　要：在电解液1 mol/L LiPF6/EC+DMC中加入4A分子筛,用恒流充放电、循环伏安和电化学阻抗谱(EIS)测试研究了4A分子筛对石墨电极性能的影响。加入4A分子筛后,石墨电极具有更好的循环性能,原因是减少了石墨表面形成稳定固体电解质相界面(SEI)膜时还原分解的电解液量,降低了SEI膜的阻抗。Effects of zeolite 4A on graphite electrode were studied through charge-discharge technique, cyclic voltammetry and electrochemical impedance spectroscopy（EIS） by adding zeolite 4A into electrolyte 1 mol/L LiPFr/EC ＋ DMC. The results showed that graphite electrode had superior cycling performance in the treated electrolyte. The amount of reduction decomposition of the electrolyte on the graphite electrode surface to form a stable solid electrolyte interphase（SEI） film was decreased, the impedance was reduced, improved the electrochemical performance of graphite electrode.

关 键 词：锂离子电池 石墨电极 电解液 固体电解质相界面(SEI)膜 4A分子筛 

分 类 号：TM912.9[电气工程—电力电子与电力传动]