Chrysanthemum flower-like copper molybdenum oxide decorated graphene oxide nanoribbon composite: A novel positive electrode material for asymmetric supercapacitor devices

Abstract

This study used hydrothermal followed by ultrasonic methods to generate a composite of CuMoO4-adorned graphene oxide nanoribbons that resembled Chrysanthemum flowers (CuMoO4/GONR). The as-prepared materials were confirmed using a variety of physicochemical methods. Different electrochemical approaches were used to determine the supercapacitor efficiency of at-the-time-fabricated electrodes, including cyclic voltammetry (CV), Galvanostatic charge-discharge tests (GCD), and electrochemical impedance spectroscopy (EIS). The findings demonstrate that compared to pure CuMoO4 and GONR matrixes, CuMoO4/GONR composite deserves dominance, such as more surface area, the occurrence of multiple active sites, improved penetration/diffusion ability, and excellent conductivity. The CuMoO4/GONR composite demonstrated a significant capacitance retention of 89 % at 5 A/g and delivered a comparably high specific capacitance of 865 F/g at 1 A/g. The prepared CuMoO4/GONR//AC asymmetric device showed a 41.7 Wh/kg energy density at 1058 W/kg power density. The obtained results validated CuMoO4/GONR composite as the promising source of electrode material used in supercapacitor devices.