Optimization of a ternary composite of CuFe2O4/CuO@rGO and its electrochemical evaluation as an electrode material for supercapacitor application

Abstract In this study, CuFe₂O₄/CuO@rGO nanocomposites were prepared using the hydrothermal technique. In order to investigate these nanocomposite electrochemical properties, researchers constructed two-electrode and three-electrode cell configurations (asymmetric cells). The nanocomposite CuFe₂O₄/CuO@rGO showed an impressive specific capacitance that exceeded 2110 Fg⁻¹ at a current density of 1 Ag⁻¹. This asymmetric cell showed an impressive 40.44 Wh kg⁻¹ energy density at a power density of 780 Wkg⁻¹, with activated carbon (AC) acting as the anode and CuFe₂O₄/CuO@ rGO as the cathode. It also had a prolonged cycle life, with 93% retention after 10,000 cycles. By illuminating light-emitting diode (LED) lights, the asymmetric cell demonstrated the practical use of this nanocomposite as an active electrode material. By keeping its electrochemical activity steady over a variety of twisting angles, this gadget also proved its structural resilience. As far as we are aware, the synthesized nanocomposite outperformed both commercial supercapacitors and the published CuFe₂O₄/CuO@rGO-based composites when used as an active electrode material. The impressive electrochemical capability of the produced nanocomposite makes it an attractive electrode material for use in high-performance supercapacitors.