Novel Graphene-Indium (III) Oxide-Molybdenum Disulfide Ternary Composite for Electrochemical Capacitor Application

Ong, Wei (2020) Novel Graphene-Indium (III) Oxide-Molybdenum Disulfide Ternary Composite for Electrochemical Capacitor Application. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

Supercapacitor is one of the promising potentials that can overpass other types of energy storage system such as capacitor, batteries, and fuel cells. The electrode materials that are selected for this project are graphene, molybdenum disulfide and indium oxide. Graphene, with its astonishing properties such as specific surface area, electronic, mechanical, properties can improve the original specific capacitance of indium oxide and molybdenum disulfide. Graphene itself, it chemically inert and gapless semimetal, its structural analog, molybdenum disulfide (MoS2) is chemically versatile with band gaps and thereby finding significant use in myriad of applications. In this study, graphene-In2O3-MoS2 ternary composite materials were prepared via green hydrothermal synthesis method and evaluated as supercapacitor electrodes. The morphology and structure of the composite were characterised by using Scanning Electron Microscopy (SEM), Raman spectroscopy, X-Ray Diffraction (XRD), Energy-Dispersive X-ray Spectroscopy (EDX). The electrochemical performances of the composite were evaluated by Cyclic Voltammetry (CV). The electrochemical results show that the performance of composite electrodes was enhanced. The maximum specific capacitance of the graphene- In2O3-MoS2 ternary composite has 145% of enhancement when compare with In2O3 individual electrode.