N-doped Carbon Framework/Reduced Graphene Oxide Nanocomposite as a Sulfur Reservoir for Lithium-Sulfur Batteries

Jeongyeon Lee, Seung Keun Park, Yuanzhe Piao

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    21 Citations (Scopus)

    Abstract

    In this study, by using commercial melamine foam as a starting material, we report a facile method to prepare N-doped carbon framework loaded with graphene (NCF-G), in which graphene nanosheets are homogeneously coated on the N-doped carbon framework. After sulfur is infused into this composite, the electrode delivers an initial capacity of 1,359.7 mA h g−1 at 0.1C (1st cycle), and maintains a specific capacity of 629.3 mA h g−1 for 150 cycles at 0.5C for lithium-sulfur batteries. The improved electrochemical performances are attributed to the capping effect exerted by N-doping for polysulfides and high electrical conductivity of the carbon framework with highly conductive graphene.

    Original languageEnglish
    Pages (from-to)1345-1353
    Number of pages9
    JournalElectrochimica Acta
    Volume222
    DOIs
    Publication statusPublished - 20 Dec 2016

    Keywords

    • hetero atom
    • lithium-sulfur batteries
    • melamine foam
    • reduced graphene oxide

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Electrochemistry

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