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Issue 38, 2011
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Flexible graphene/MnO2 composite papers for supercapacitor electrodes

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Graphene/manganese dioxide (MnO2) composite papers (GMCP) are fabricated via a simple three-step route: preparation of graphene oxide/MnO2 composite (GOMC) dispersion, subsequent vacuum filtration of GOMC dispersion to achieve graphene oxide/MnO2 composite paper (GOMCP), and finally thermal reduction of GOMCP to generate GMCP. The morphology and microstructure of the prepared samples are characterized by field-emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, thermal gravimetric analysis and X-ray photoelectron spectroscopy. Moreover, as a binder-free and flexible electrode material for supercapacitors, the electrochemical properties of the prepared GMCP are evaluated by cyclic voltammetry and galvanostatic charge/discharge tests. As a result, the specific capacitance of the GMCP with the MnO2 weight ratio of 24% (GMCP-24) reaches 256 F g−1 at a current density of 500 mA g−1 and also shows good cycle stability, indicating a promising potential application as an effective electrode material for supercapacitors.

Graphical abstract: Flexible graphene/MnO2 composite papers for supercapacitor electrodes

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The article was received on 03 May 2011, accepted on 12 Jul 2011 and first published on 15 Aug 2011

Article type: Paper
DOI: 10.1039/C1JM11941A
Citation: J. Mater. Chem., 2011,21, 14706-14711
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    Flexible graphene/MnO2 composite papers for supercapacitor electrodes

    Z. Li, Y. Mi, X. Liu, S. Liu, S. Yang and J. Wang, J. Mater. Chem., 2011, 21, 14706
    DOI: 10.1039/C1JM11941A

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