Investigation of Supercapacitor Properties of Nanostructured Cobalt Manganese Oxide/PANI Composite Materials

Abstract Transition metal oxide-based composites have emerged as attractive candidates for supercapacitor electrodes due to their excellent redox activity, stability and cost-effectiveness. In this study, cobalt manganese oxide nanostructures were grown on nickel foam using a hydrothermal method and then integrated into the conductive polymer polyaniline (PANI) composite. The hybrid cobalt manganese oxide/polyaniline composite combines the high theoretical capacitance of metal oxides with the superior electrical conductivity of PANI. The structural and morphological properties were characterized using XRD, FTIR, and SEM techniques, while the electrochemical behavior was evaluated through cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements. The composite electrode exhibited a high specific capacitance of 1326 F g–1 at 0.5 A g–1, which was attributed to its porous morphology and increased active surface area. These findings demonstrate the potential of CoMn2O4/PANI composites as high-performance electrode materials for next-generation energy storage devices, especially in pseudocapacitor applications.