Large-scale Co3O4 nanoparticles growing on nickel sheets via a one-step strategy and their ultra-highly reversible redox reaction toward supercapacitors

Ultra-high electrochemical reversible redox reactions for energy storage at high rates are realized from large-scale Co3O4 nanoparticles growing on a nickel sheet pretreated with HNO3 via a facile one-step hydrothermal strategy.