a graphene and nickel-cobalt metal organic framework composite as a high-performance electrode material for supercapacitor application

A high-performance ni, co-mof-g/nickel foam was fabricated using a novel electrodeposition method and used as an electrode material for a supercapacitor application. structural tests including powder x-ray diffraction (xrd), fourier transform infrared spectroscopy (ft-ir), and raman results affirmed the formation of the electrode active materials. scanning electron microscopy (sem) images showed a flower-like ni, co-mof inside graphene sheets forming a composition of active materials on the nickel foam substrate. the electrochemical performance of the ni, co-mof-g/ nickel foam was examined using cyclic voltammetry (cv), galvanostatic charge/discharge (gcd), and electrochemical impedance spectroscopy (eis). the prepared electrode delivered approvable specific capacitance of 1158 f g-1 at the current density of 2 a g-1 in three molar potassium hydroxides. excellent storage capacity of the fabricated electrode is attributed to the synergetic effects of bi-metal metal organic frameworks (ni, co-mof) with porous carbon materials (graphene).