Conductive porous vanadium nitride/graphene composite as chemical anchor of polysulfides for lithium-sulfur batteries

Sun, Zhenhua; Zhang, Jingqi; Yin, Lichang; Hu, Guangjian; Fang, Ruopian; Cheng, Hui–Ming; Li, Feng

doi:10.1038/ncomms14627

articleNature CommunicationsMar 3, 2017GOLD OA

Conductive porous vanadium nitride/graphene composite as chemical anchor of polysulfides for lithium-sulfur batteries

ZSZhenhua Sun JZJingqi Zhang LYLichang Yin GHGuangjian Hu RFRuopian Fang

Chinese Academy of Sciences · Tsinghua–Berkeley Shenzhen Institute · +1 more institution

PubMed

Indexed incrossrefdoajpubmed

Abstract

Abstract Although the rechargeable lithium–sulfur battery is an advanced energy storage system, its practical implementation has been impeded by many issues, in particular the shuttle effect causing rapid capacity fade and low Coulombic efficiency. Herein, we report a conductive porous vanadium nitride nanoribbon/graphene composite accommodating the catholyte as the cathode of a lithium–sulfur battery. The vanadium nitride/graphene composite provides strong anchoring for polysulfides and fast polysulfide conversion. The anchoring effect of vanadium nitride is confirmed by experimental and theoretical results. Owing to the high conductivity of vanadium nitride, the composite cathode exhibits lower polarization…

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Topics & keywords

Topics

Keywords

Vanadium nitride
Graphene
Materials science
Cathode
Polysulfide
Composite number
Faraday efficiency
Nitride

UN Sustainable Development Goals

Affordable and clean energy

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