Exploring the Potential of Co3O4@MnO2@ZnO Enhanced with Vitex Doniana Leaf Extract for Supercapacitor Electrode Applications

The use of transition metal oxides as supercapacitor electrodes has attracted a great deal of attention because of their properties such as superior electrochemical performances, availability, low toxicity and affordability. It has been noted that Co3O4@MnO2@ZnO composites augmented with Vitex doniana leaf extract as an electrode material is being investigated for the first time in the context of supercapacitors. The Co3O4@MnO2@ZnO composite electrode mediated with Vitex doniana leaf extract used in this study was produced using the chemical bath deposition technique. The findings demonstrated that Co3O4@MnO2@ZnO nanocomposites enhanced with Vitex doniana leaf extract are good material for supercapacitor electrode fabrication. This is demonstrated by the achievement of maximum specific capacitances of 1 215 F/g using cyclic voltammetry and 1 250 F/g at a current density of 0.5 A/g using galvanostatic charge–discharge. After 10 000 complete cycles, Co3O4@MnO2@ZnO (CMZ/150) showed exceptional stability, with a 97.25% retention rate.