Efficient synthesis and electrochemical profiling of nickel tungstate for supercapacitor application

Abstract

The Nickel Tungstate nanomaterial was synthesized by the green synthesis method. The powder x-ray diffraction analysis was carried out for Nickel Tungstate and its crystalline nature was identified. The optical properties of the Nickel Tungstate were studied. The surface morphology of the Nickel Tungstate was tested using a scanning electron microscope (SEM). The surface area analysis was obtained by BET analysis. X-ray photoelectron Spectroscopy was used to identify the Binding energy of the materials. The electrochemical properties were investigated using Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), and Charge-Discharge (GCD). The highest cyclic stability for 10,000 charge and discharge cycle was reported in this paper with good retention at 98 %. NiWO₄ NPs electrode material shows high specific capacitance values of 425 F g⁻¹, 300 F g⁻¹ and 605 F g⁻¹ at a current density of 3 mA/g for pH5, pH6 and pH7 respectively.