Preparation of Ordered Mesoporous Carbon/NiCo2O4 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(-1) 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(-1), with a capacitance retention of 92.7%.