Copper oxide-based high-performance symmetric flexible supercapacitor: potentiodynamic deposition

Abstract Flexible supercapacitors have gained significant attention in recent times due to their many advantages such as high specific capacitance, lightweight, long lifespan, energy density, flexibility, and high-power density. These benefits make them ideal for various applications industries. Copper oxide is particularly attractive an electrode material because of its theoretical low cost, eco-friendliness. the most promising storage systems among metal oxides higher value capacitance (1800 F/g). In present study, synthesis a thin film copper on flexible substrate through electrodeposition was carried out produce lightweight supercapacitor. The supercapacitor's performance evaluated using cyclic voltammetry (CV) galvanostatic charge–discharge analysis 1 M KOH electrolyte. results showed that oxide/copper-based supercapacitor had large 983.3 F/g good even after 2200 cycles, with capacity retention 89.70%. flexibility measured at bending angles. 87.5% 180° angle coulombic efficiency 79.15%. Hence, it could be electrodes. This demonstrates has great potential newer industries wearable electronics, displays, harvesting can explored.