文献类型：期刊文献

英文题名：N-doped yolk-shell hollow carbon sphere wrapped with graphene as sulfur host for high-performance lithium-sulfur batteries

作者：Zhang, Yongzheng[1];Sun, Kai[1];Zhan, Liang[1,2];Wang, Yanli[1];Ling, Licheng[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Minist Educ,State Key Lab Chem Engn, Key Lab Specially Funct Polymers & Related Techno, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Coal Chem, CAS Key Lab Carbon Mat, Taiyuan 030001, Shanxi, Peoples R China

年份：2018

卷号：427

起止页码：823

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20173504093367);WOS:【SCI-EXPANDED(收录号:WOS:000415135500095)】；

基金：This work was financially supported by National Science Foundation of China (51472086, 51002051) and CAS Key Laboratory of Carbon Materials (KLCMKFJJ1703).

语种：英文

外文关键词：Lithium-sulfur battery; Hollow carbon sphere; Graphene; Nitrogen doping

摘要：N-doped yolk-shell hollow carbon sphere wrapped with reduced graphene oxide (rGO/N-YSHCS) is designed and fabricated as sulfur host for lithium-sulfur batteries. The shuttle effect of polysulfides can be suppressed effectively by the porous yolk-shell structure, graphene layer and N-doping. A good conductivity network is provided for electron transportation through the graphene layer coupled with the unique yolk-shell carbon matrix. Such unique structure offers the synthesized rGO/N-YSHCS/S electrode with a high reversible capacity (800 mAh g(-1) at 0.2 C after 100 cycles) and good high-rate capability (636 mAh g(-1) at 1 C and 540 mAh g(-1) at 2 C). (C) 2017 Elsevier B.V. All rights reserved.