Electrochemical behaviour of ZrS2@rGO nanohybrid for high-performance supercapacitors

Abstract

The batteries and capacitors have limited energy storage capacity due to reduced electrochemical performance and cycle stability. The existence problem can be overcome by fabricated nanostructured materials via enhanced electrical conduction and a significant surface area are essential for fulfilling the key requirements in evaluating as excellent electrode used in supercapacitors application, like as stability and extraordinarily high performance. This study utilises a cost-effective sonochemical approach to fabricate a ZrS2@rGO nanohybrid. The synthesized ZrS2 and ZrS2@rGO nanohybrid electrode were analyzed by their structural behaviour, oxidation state and morphological properties by utilising X-ray diffractometry (XRD), X-ray photoelectron spectroscopy and scanning electron microscopy (SEM) to verify the fabricated material. The addition of rGO sheets to ZrS2 particles enhances the surface area as well as capacitance of the ZrS2@rGO nanohybrid due to superior adsorption of electrolyte ions. The ZrS2@rGO nanohybrid demonstrated exceptional stability and attained the exceptional capacitance (Cs) of (1237.9 F/g) @ 1 A/g and the energy (68.5 Wh/kg), power density (Pd) of 315.7 W/kg during GCD (galvanostatic charge/discharge) analysis by utilising three-electrode setup. The ZrS2@rGO nanohybrid exhibits exceptional electrochemical properties, which proved to be an excellent material for their significant storage, unlike batteries and simple capacitors, as well as used as considerable potential for future technological advancements and energy storage devices.