Enhanced Structural and Electrochemical properties of Vanadium doped NiCo2O4 nanoparticles synthesized by microwave hydrothermal method

Abstract

Abstract Nickel cobaltite has been developed as an energy storage material for electrochemical supercapacitors as a solution to the present energy crisis in the world. The transition metal-doped nickel cobaltite exhibits good electrochemical properties. The vanadium-doped nickel cobaltite nanoparticles were synthesised by using an efficient microwave hydrothermal calcinated at 950°C for 4 hours. The structural analysis confirms that the prepared samples were found to be cubic spinel, with an average grain size of 108 nm. The electrochemical analysis of the samples examined by cyclic voltammetry, galvanostatic charge-discharge test, and electrochemical impedance spectrum confirms the sample V0.3Ni0.7Co2O4 exhibits a high specific capacitance (Cs) of 412.5 F g− 1, an energy density (Ed) of 12.12 Wh kg− 1, and a power density (Pd) of 243.05 W kg− 1 at a current density of 1 A g− 1 which can be used as a better performance electrode for supercapacitor applications.