Oxidation-Resistant and Elastic Mesoporous Carbon with Single-Layer Graphene Walls

Hirotomo Nishihara, Tomoya Simura, Shunsuke Kobayashi, Keita Nomura, Raúl Berenguer, Masashi Ito, Masanobu Uchimura, Hiroshi Iden, Kazuki Arihara, Atsushi Ohma, Yuichiro Hayasaka, Takashi Kyotani

    Research output: Contribution to journalArticlepeer-review

    53 Citations (Scopus)

    Abstract

    An oxidation-resistant and elastic mesoporous carbon, graphene mesosponge (GMS), is prepared. GMS has a sponge-like mesoporous framework (mean pore size is 5.8 nm) consisting mostly of single-layer graphene walls, which realizes a high electric conductivity and a large surface area (1940 m2 g−1). Moreover, the graphene-based framework includes only a very small amount of edge sites, thereby achieving much higher stability against oxidation than conventional porous carbons such as carbon blacks and activated carbons. Thus, GMS can simultaneously possess seemingly incompatible properties; the advantages of graphitized carbon materials (high conductivity and high oxidation resistance) and porous carbons (large surface area). These unique features allow GMS to exhibit a sufficient capacitance (125 F g−1), wide potential window (4 V), and good rate capability as an electrode material for electric double-layer capacitors utilizing an organic electrolyte. Hence, GMS achieves a high energy density of 59.3 Wh kg−1 (material mass base), which is more than twice that of commercial materials. Moreover, the continuous graphene framework makes GMS mechanically tough and extremely elastic, and its mean pore size (5.8 nm) can be reversibly compressed down to 0.7 nm by simply applying mechanical force. The sponge-like elastic property enables an advanced force-induced adsorption control.

    Original languageEnglish
    Pages (from-to)6418-6427
    Number of pages10
    JournalAdvanced Functional Materials
    Volume26
    Issue number35
    DOIs
    Publication statusPublished - 2016 Sep 20

    Keywords

    • elastic materials
    • flexible frameworks
    • graphene
    • mesoporous carbons
    • supercapacitors

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

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