<p>The Cu₂S/CuO nanoflakes were synthesized by simple hydrothermal method using SDS as surfactant as well as sulfur agent for the first time. The structural, morphological and electrochemical properties were studied. The x-ray diffraction analysis confirms the formation of monoclinic Cu₂S and CuO. The Field Emission Scanning Electron microscopic images show the formation of nanoflakes like structure. The electrochemical studies of Cu₂S/CuO nanocomposite have been investigated by cyclic voltammetric, galvanostatic charge-discharge and electrochemical impedance spectroscopic techniques. The GCD analysis reveals the maximum specific capacitance of 587 Fg⁻¹ at a current density of 1 Ag⁻¹. The electrode shows lower charge transfer resistance (R_CT) 2.68 Ω with good cyclic stability. The symmetric device delivered a maximum specific capacitance of 69 Fg⁻¹ at a current density of 3 Ag⁻¹ with the energy density of 18.6 Whkg⁻¹.</p>