氢氧化镍/石墨烯复合材料的制备及其电化学性能研究

Nickel hydroxide/graphene composites were synthesized through a hydrothermal reaction. The structure and morphology of the materials were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The results show that nickel hydroxide nanoplates are nomogeneously deposited on the surface of the the graphene sheets. As an electrode material, the composites exhibits an excellent supercapacitive behavior. Electrochemical performance of the materials was evaluated by cyclic voltammetry. When the scanning rate is 5mV/s, the composites shows a specific capacitance of 779 F/g in 6mol/L KOH electrolyte. and shows good electrochemical reversibility.