Synthesis and electrochemical performance of cobalt oxide deposited on nickel-foam for energy storage devices

Abstract

Efficient and flexible energy storage materials are the future of energy technology. Among the various energy storage devices supercapacitor which stores electrochemical energy with higher power density than battery and higher energy density than capacitor is a potential device. In the supercapacitor, electrode active material plays very important role for storage and transportation of electrolytic ions. Herein, we have synthesized substrate free cobalt oxide deposited nickel-foam with the help of microwave-assisted hydrothermal technique, which is novel and faster synthesis process than conventional synthesis processes. Morphological characterization of as-synthesized samples was investigated with FESEM. Electrochemical performance with specific capacitance (Cs) value of 98.31 F g1 at 0.25 A g1 current density and 93.59 F g1 at 1 mV s1 scan rate obtained from galvanostatic charge/discharge and cyclic voltammetry curves.