Enhanced electrochemical performance of copper oxide nanobeads a potential electrode material for energy storage devices

•CuO nanobeads was synthesized by simple Co-precipitation method.•CV and GCD analysis confirms the faradic nature of synthesized material.•A high value of specific capacity 69.1 mA hg−1 (771 Fg−1).•Capacitance retention of 82.1% was achieved up to 1000 cycles.