Preparation of Ordered Mesoporous CarbonlNiCo2O4 Electrode and Its Electrochemical Capacitive Behavior
OMC/NiCo2O4 composite was prepared by co-precipitation with ordered mesoporous carbon (OMC) as a support. The crystalline structure and morphology of the composite were investigated by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). TEM images showed that NiCo2O4 was uniformly coated on the OMC. Cyclic voltammetry and galvanostatic charge-discharge were used to investigate the electrochemical performance of the OMC/ NiCo2O4 composite. The specific capacitances of the OMC/NiCo2O4 composite with a mass fraction of 40% NiCo2O4 were 577.0 F G"1 at a current density of 1 A G~' and 470.8 F G~1 at 8 A G-1. The specific capacitance remains at 508.4 F G~1 after 2000 cycles at a current density of 2 A-g~\ with a capacitance retention of 92.7%.
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