Designing the redox activity of CuMoO4 electrodes on N-rich reduced graphene oxide nanocomposite for high performance supercapacitor

Abstract

In this investigation, environmentally friendly supercapacitor electrode materials of CuMoO4 coated on nitrogen-doped reduced graphene oxide (CMO/NRGO) nanocomposite were fabricated using a low-cost hydrothermal method. This supercapacitor has currently attracted devices and long-time stability. The electrochemical behavior of the system was investigated with working electrodes coated on Ni foam substrate in a 6 M KOH electrolyte. The findings revealed substantial advancements in specific capacitance for the fabricated electrode, attaining a value of 629.6 F g−1 at 1 A g−1. An asymmetric capacitor was fabricated by using CMO/NRGO (CuMoO4/N doped rGO) and activated carbon (AC). It design enables the hybrid capacitor to attain a balance between EDLC and PC characteristics, making it suitable for applications requiring both efficient energy storage and rapid charge/discharge capabilities. In 1.4 voltage range, an asymmetric capacitor shows good energy and power (42.85 Wh kg−1 at 580.36 W kg−1) density. After 6000 cycles, it retains 87.2 % of capacitance value. The obtained results suggest that CMO/NRGO electrode exhibits significant for developing the effective and long-lasting energy storage systems.