分子筛SBA-15对锂硫电池电化学性能的影响  

Impact of Molecular Sieve SBA-15 on the Electrochemical Performance of Lithium Sulfur Batteries

作　　者：李霞[1] 田建华[1] 单忠强[1] Li Xia;Tian Jianhua;Shan Zhongqiang(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2018年第5期35-41,共7页Chemical Industry and Engineering

基　　金：国家高技术研究发展计划(2013AA050901)资助项目

摘　　要：针对锂硫电池存在的主要问题,将介孔分子筛SBA-15添加在锂硫电池硫电极中,通过SBA-15的吸附作用来抑制多硫化物的穿梭效应。采用扫描电子显微镜、透射电子显微镜、氮气吸脱附测试等物理手段对材料进行表征,采用电池测试系统对电池的电化学性能进行测试。结果表明:添加1%SBA-15的SCS-1.0电池电化学性能得到明显提高,第300圈放电比容量比未添加SBA-15的SC电池的放电比容量提高200 mAh·g^(-1)左右。所以,在硫电极中添加1%SBA-15有利于锂硫电池电化学性能的提高。In order to solve the main problems existed in the lithium sulfur battery,a certain amount of mesoporous molecular sieve SBA-15 was added into the sulfur electrode. The physical structures of SBA-15 were determined by scanning electron microscopy,transmission electron microscopy and nitrogen adsorption methods,the electrochemical performance of cells were characterized by cycling tests. The results indicate that the cell with 1% SBA-15（ SCS-1. 0） shows excellent electrochemical performance,the specific discharge capacity of SCS-1. 0 cell was 200 mAh·g^-1 higher than that of SC cell at the 300 th cycle. So the addition of 1% SBA-15 is beneficial to improve the electrochemical performance of lithium sulfur batteries.

关 键 词：锂硫电池 硫电极 分子筛SBA-15 多孔材料 吸附 

分 类 号：TM912.9[电气工程—电力电子与电力传动]