Facile synthesis of CuCo2O4 spinel with rGO nanocomposite via hydrothermal approach for solid state supercapacitor application

Spinel oxide nanomaterial based on pseudocapacitor electrodes is a superior remedy for the present energy problem. In this study, CuCo2O4 and reduced graphene oxide (rGO) are mixed utilizing a clean hydrothermal strategy. The characteristics of synthesized electrocatalysts were examined by employing microscopic and spectroscopic techniques. Galvanostatic charge-discharge techniques (GCD), cyclic voltammetry (CV), electro-chemical impedance spectroscopy (EIS), and chronoamperometry (CA) were used to analyze the electrocatalytic behavior of all synthesized materials. The electrochemical analysis showed that the incorporation of rGO rises the discharge duration interval resultant enhances the specific capacitance (Cs) and improves the overall stable behavior of the CuCo2O4 electrocatalytic materials. At 2.0 A g-1, the electrochemical findings of spinel/rGO nanohybrid show Cs of 1372.93 F g-1, energy density (Ed) of 70.02 Wh Kg-1 and power density (Pd) of 606 W Kg-1 at 2 A g-1. The nanohybrid showed 96.35 % capacitance retention over 5000th cycles and remained stable for 40 h. However, adjustments to the electrical and structural arrangement, morphology, or doping technique improved the capacitive activity of the produced electrode.

Automated summary

In this study, CuCo2O4 and reduced graphene oxide (rGO) were mixed using a clean hydrothermal strategy to synthesize CuCo2O4/rGO nanocomposites with excellent electrochemical performance. The synthesized electrocatalysts were characterized by microscopic and spectroscopic techniques, and their electrocatalytic behavior was analyzed using galvanostatic charge-discharge techniques, cyclic voltammetry, electro-chemical impedance spectroscopy, and chronoamperometry. The electrochemical analysis showed that the incorporation of rGO increases the discharge duration interval, enhances the specific capacitance (Cs), and improves the overall stable behavior of the CuCo2O4 electrocatalytic materials. The nanocomposite exhibited high capacitance retention and stability over multiple cycles and hours. Adjustments to the electrical and structural arrangement, morphology, or doping technique improved the capacitive activity of the produced electrode.