A facile one-step hydrothermal method to produce alpha-MnO2/graphene sheet composites and its electrochemical properties

作者：Chen, Chunnian^*; Fu, Wen; Yu, Chenwei

来源：Materials Letters, 2012, 82: 133-136.

DOI：10.1016/j.matlet.2012.04.041

• MnO2 nanotubes
• Graphene oxide
• Graphene sheet
• Composite materials
• Specific capacitance
• Nanocrystalline materials

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).

• 出版日期2012-9-1
• 单位合肥工业大学