Fig. 8From: Punicalagin Green Functionalized Cu/Cu2O/ZnO/CuO Nanocomposite for Potential Electrochemical Transducer and CatalystCharge-discharge curves of Ni/Cu/Cu2O/CuO/ZnO electrode in 2 M KOH at a constant current density (0.1 mAcm−2) and b at various current densities (0.1–0.35 mAcm−2)Back to article page