Investigation of Zirconium Disulphide Quantum Dots for Supercapacitor Applications

Abstract

The Transition metal dichalcogenides (TMDs) attract more interest because of their layered structure and high surface‐volume ratio. Most works are based on 3D and 2D, there is scarce research on its reduced dimensionality. In this study, Zirconium disulfide (ZrS2) (where M = Zr, X = S) Quantum Dots (QDs) are synthesized by Top‐down Chemical Bath Deposition (CBD) method, and the physical properties of the sample are characterized by the X‐ray powder diffraction method (XRD) for phase identification, Scanning electron microscope (SEM) with Energy Dispersive X‐ray Spectroscopy (EDS) for morphology and composition. Synthesized ZrS2 QDs are found to belong to the Trigonal lattice system with a crystalline size 0.58 nm. The Electrochemical performance of the synthesized ZrS2 QDs is studied with the fabricated electrode from Cyclic Voltammetry (CV), Galvanostatic charge and discharge (GCD)/Chronopotentiometry (CP), and Electrochemical Impedance Spectroscopy (EIS) studies. The specific capacitance (Csp), energy density (Ed), and power density (Pd) are calculated with the help of a three‐electrode system. From the CV and GCD/CP, the fabricated electrode material is found to exhibit Faradaic behavior. The synthesized ZrS2 QDs are found to emerge as suitable candidates for electrochemical energy storage applications.