Abstract
In this work, copper-bismuth oxide (CuBi2O4) nanoparticles were supported on nanoporous stainless steel by a simple electrochemical deposition method and then was employed as a binder-free electrode for supercapacitor application. The structure and surface morphologies of the nanoparticles-supported on nanoporous stainless steel were investigated using X-ray diffraction spectroscopy, energy dispersive X-ray spectroscopy and scanning electron microscopy. The electrochemical properties of the proposed electrode were examined using cyclic voltammetry and galvanostatic charge–discharge techniques in different electrolytes. The results showed that the proposed electrode exhibited a maximum specific capacitance of 144 mA h g−1 or 647 F g−1 at a current density of 1.0 A g−1 in 6.0 mol L−1 KOH with excellent long-term cycling stability (80% capacitance remained after 500 charge–discharge cycles). The proposed nanostructure is a suitable candidate for electrode material in energy storage devices.
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