文献类型：期刊文献

英文题名：Enhanced performance of lithium-sulfur batteries with high sulfur loading utilizing ion selective MWCNT/SPANI modified separator

作者：Shi, Lu[1,2];Zeng, Fanglei[3];Cheng, Xing[4];Lam, Kwok Ho[2];Wang, Weikun[5];Wang, Anbang[5];Jin, Zhaoqing[5];Wu, Feng[3,6];Yang, Yusheng[5]

第一作者：史璐;Shi, Lu

通讯作者：Wang, WK[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[2]Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China;[3]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China;[4]Beijing Univ Chem Technol, Dept Mat Sci & Engn, Beijing 100029, Peoples R China;[5]Res Inst Chem Def, Mil Power Sources Res & Dev Ctr, Beijing 100191, Peoples R China;[6]Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Res Inst Chem Def, Mil Power Sources Res & Dev Ctr, Beijing 100191, Peoples R China.

年份：2018

卷号：334

起止页码：305-312

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20180804819552);Scopus(收录号：2-s2.0-85042114824);WOS:【SCI-EXPANDED(收录号:WOS:000418533400031)】；

基金：This work was financially supported by the Fund from Beijing Science and Technology Project (no. D151100003015002) and the Hong Kong Polytechnic University (1-ZVGH).

语种：英文

外文关键词：Multiwall carbon nanotube/sulfonated polyaniline-coated separator; Ion selective; -SO3- groups; High sulfur loading; Polysulfides shuttle; Lithium-sulfur battery

摘要：Lithium-sulfur (Li-S) battery has attracted remarkable attention owing to its high theoretical energy density. However, its commercialization is still hampered by the rapid capacity degradation which mainly originates from the polysulfides shuttle between the anode and cathode. In this paper, a functional multiwall carbon nanotube/sulfonated polyaniline (MWCNT/SPANI) modified separator is designed to enhance the electrochemical performance of the Li-S batteries with high sulfur loading. The MWCNT/SPANI-coated separator is highly permselective to Li+ but rejects the transportation of polysulfide anions. Besides, the MWCNT/SPANI coating can also work as an upper current collector and provides channels for electron and ion transport to enhance the sulfur utilization and ensure the reactivation of trapped active materials. With the ion selective MWCNT/SPANI-coated separator, the electrochemical performance of the Li-S batteries based on cathodes with high sulfur loading (5 mg cm(-2)) and high sulfur content (72 wt%) has been significantly improved. It delivers a reversible capacity of 913 mA h g(-1) at the current density of 100 mA g(-1) after 100 cycles, much higher than that of the cells with pristine Celgard separator. Hence, the ion selective MWCNT/SPANI modified separator is promising for developing high-performance Li-S batteries employing cathodes with high sulfur loading and high sulfur content.