Journal
MATERIALS LETTERS
Volume 82, Issue -, Pages 133-136Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2012.04.041
Keywords
MnO2 nanotubes; Graphene oxide; Graphene sheet; Composite materials; Specific capacitance; Nanocrystalline materials
Funding
- Hefei Uninversity of Technology, school-enterprise cooperation projects production of China [10643301]
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A composite of graphene sheet (GNS) supported by nanotube-like MnO2 nanocrystalline (alpha-MnO2/GNS composites) has been fabricated through a facile one-step hydrothermal method. The nanosized MnO2 particles were homogeneously distributed on GNS, which have been confirmed by transmission electron microscopy analysis (TEM). The structure, composition and electrochemical properties of alpha-MnO2/GNS composites were investigated by means of selective-area electron diffraction (SAED). Fourier transform infrared spectroscopy (FT-IR). X-ray diffraction (XRD), cyclic voltammetry (CV) curves and Galvanostatic charge-discharge curves. alpha-MnO2/GNS composites exhibited a high specific capacitance of 116 F.g(-1) in 1 M Na2SO4 electrolyte. In addition, the alpha-MnO2/GNS composite electrode shows good long-term cycle stability (only 11.99% decrease of the specific capacitance is observed after 1000 charge-discharge cycles). (C) 2012 Elsevier By. All rights reserved.
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