CuFe2O4 particles decorated on NiO nanosheets for high performance semi-solid supercapacitor

Abstract

Transition metal oxides and ferrite-based nanostructures have emerged as desirable candidates for electrode materials in energy storage systems, particularly supercapacitors. This is primarily due to their unique combination of advantageous properties, including superior electrochemical stability, efficient mixed ionic-electronic conductivity, cost-effectiveness, and eco-friendliness. These features make them well-suited for sustainable energy technologies. In the current study, a CuFe₂O₄/NiO composite was successfully prepared using a one-step hydrothermal method. The electrochemical studies revealed outstanding charge storage capability, with the CuFe₂O₄/NiO composite delivering a high specific capacitance (Csp) of ∼348 F/g at a current density of 1 A/g. The electrode delivered an energy density (E_D) of 20.25 Wh/kg with a corresponding power density (P_D) of 565 W/kg, highlighting its promising capability for energy storage. This enhanced electrochemical response is attributed to the cooperative effect between the CuFe₂O₄ and NiO phases. This synergy not only improves the electrical conductivity but also imparts magnetic responsiveness, which may offer additional benefits in functional device integration. Overall, these findings highlight the potential of CuFe₂O₄/NiO nanocomposites as suitable materials for next-generation electrochemical energy applications, especially in SC technologies.