文献类型：期刊文献

英文题名：Realizing Li-S Batteries with Efficient Polysulfide Trapping and Conversion by using a High-Nitrogen-Content-Doped Fe-N-C Porous Carbon Nanosheet-Modified Separator

作者：Huang, Qigang[1];Xu, Jie[2];Fang, Minxiang[1];Ma, Lianbo[2];Cao, Yongjie[3];Fan, Chuanjie[1];Hu, Shuozhen[1];Zhang, Xinsheng[1];Niu, Dongfang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Peoples R China;[3]Fudan Univ, Inst New Energy, Shanghai Key Lab Mol Catalysis & Innovat Mat, Dept Chem, Shanghai 200433, Peoples R China

年份：2022

卷号：7

期号：42

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000879803000001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21972042) and the National Key R&D Program of China (No. 2017YFB0307502).

语种：英文

外文关键词：electrocatalysis; high surface area; lithium-sulfur batteries; metal-nitrogen-carbon; shuttle effect

摘要：Lithium-sulfur (Li-S) batteries with high theoretical energy density have earned much attention in recent years. Nevertheless, the shuttle effect and tardy conversion of polysulfides severely hinder their practical applications. Herein, the high-nitrogen-doped Fe-N-C porous carbon nanosheets (denoted as AT-Fe-N-C-Me) were synthesized and coated on separator as an effective electrocatalyst for Li-S batteries. Benefiting from the hierarchical porous carbon structure and rich Fe-N-x catalytic sites, the AT-Fe-N-C-Me coating layer can effectively suppress the polysulfides shuttling and promote their redox conversion simultaneously. As a result, the Li-S batteries with AT-Fe-N-C-Me modified separators deliver superior rate capability (785.5 mAh g(-1) at 4.0 C) and cycling stability (capacity decay rate of 0.065 % per cycle over 1000 cycles at 1.0 C). This work provides a new strategy to design efficient electrocatalyst with high-surface-area porous structure for high-performance Li-S batteries.