Development of NiCo2O4/rGO Nanocomposites for High Performance Supercapacitors

Abstract Transition metal oxide nanocomposites featuring diverse structures have garnered significant attention in the realm of supercapacitors. This interest is attributed to their cost‐effectiveness, high surface area, rapid transport of ions and electrons, and the ability to deliver high specific capacitance. In this work, sea‐urchin shaped NiCo 2 O 4 reduced graphene oxide (NCO/rGO) nanocomposites were synthesized via facile hydrothermal route. NCO/rGO nanocomposite was subsequently loaded on nickel foam (NF) using the drop casting method to build NCO/rGO electrodes. The structural and morphological characteristics of our designed electrodes such as NCO and NCO/rGO electrodes were investigated by scanning electron microscope (SEM), energy dispersive spectroscopy (EDX), X‐ray diffraction (XRD), and Fourier infrared transform spectroscopy (FTIR) while cyclic voltammetry (CV), galvanostatic charge‐discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques were performed to address the electrochemical efficacy of our designed electrodes which reveal redox‐mediated charge storage in NCO‐rGO. As‐prepared NCO/rGO electrode exhibited high specific capacitance of 875 F g −1 at current density of 1 A g −1 which demonstrates the potential of NCO/rGO as a suitable candidate in supercapacitor applications.