分子筛SBA-15对锂硫电池电化学性能的影响

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。

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	李霞
	田建华
	单忠强

关键词：锂硫电池硫电极分子筛SBA-15 多孔材料吸附

Abstract： 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 300th cycle. So the addition of 1% SBA-15 is beneficial to improve the electrochemical performance of lithium sulfur batteries.

Keywords： lithium sulfur batteries； sulfur electrode； mesoporous molecular sieve SBA-15； porous material； absorption

Received 2016-05-26;

Fund:国家高技术研究发展计划（2013AA050901）资助项目。

Corresponding Authors: 单忠强,E-mail:shanzq@tju.edu.cn。 Email: shanzq@tju.edu.cn

About author: 李霞(1990-),女,硕士研究生,现从事锂硫电池正极材料的研究。

引用本文:

李霞, 田建华, 单忠强.分子筛SBA-15对锂硫电池电化学性能的影响[J]. 化学工业与工程, 2018,35(5): 35-41

Li Xia, Tian Jianhua, Shan Zhongqiang.Impact of Molecular Sieve SBA-15 on the Electrochemical Performance of Lithium Sulfur Batteries[J]. Chemcial Industry and Engineering, 2018,35(5): 35-41

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