Fabrication and Electrochemical Investigation of RGO-NiO Nanocomposite Electrodes for Supercapacitor Applications

Abstract

The present investigation details the hydrothermal production of RGO-NiO nanocomposite and examines the electrochemical performance of the composite electrode functioning on an adaptable carbon cloth substrate. The RGO-NiO nanostructures display incredible super-capacitive functionality when used in a two-electrode system with a 2 M KOH-PVA electrolyte. This is due to the unique characteristics of RGO, which functions as a flexible and expandable platform for creating NiO nanocrystals with a nanoscopic spherical morphology. Large surface areas in these nanostructures facilitate ion diffusion, which ultimately raises specific capacitance. The nanocomposite electrode as-prepared displays a robust two-electrode structure, a constant potential window between (0V and 0.45V), and specific capacitances of up to 749F/g from CV at a rate of scan of 5mV/s and 366F/g from GCD at 1A/g. 5000 cycles of cyclic stability were examined, and the capacitance retention was 91.23% after successive cycles.