Enhancing energy storage capabilities of cobalt sulfide by controlling synthesis growth parameters

Abstract

This thesis investigates the electrochemical performance of cobalt sulfide CoxSy films deposited via pulse and continuous electrodeposition methods for energy storage applications. Supercapacitors, known for their high-power density and rapid charge-discharge capabilities, represent a critical technology in the field of energy storage. However, enhancing their energy density remains a significant challenge, often addressed through the exploration of advanced electrode materials such as transition metal sulfides. The pulse and continuous electrodeposition methods are utilized to fabricate cobalt sulfide films, with the pulse method offering precise control over deposition parameters. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses reveal distinct morphologies and surfaces for the deposited films. Electrochemical characterization, including cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements, demonstrates superior specific capacitance for the pulse-electrodeposited Cobalt sulfide films compared to their continuous counterparts.