Cyclic Voltammetry And Charge/Discharge Analyses Of Asymmetric Supercapacitor Based On Graphene/MoS2 And Graphene Electrodes

Mohammad Haniff, Imanina (2019) Cyclic Voltammetry And Charge/Discharge Analyses Of Asymmetric Supercapacitor Based On Graphene/MoS2 And Graphene Electrodes. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Robust and attractive electrode material tailing from brilliant electrochemical properties has led to the emergence of graphene in the fabrication of electrodes for supercapacitors, which in the present day has attracted it for high performance of asymmetric supercapacitors (ASCs). Acting as a fitting substrate for growth and anchoring of metal sulphide to explore hybrid composite, in this research project, graphene in one of the electrodes was hybridised with a transition metal dichalcogenides (TMDs), molybdenum disulphide (MoS2) which possesses unique properties and graphene-like two-dimensional structure. The composition of electrode materials slurry, active materials to binder to solvent is displayed by an ideal of 80:10:10 which the 80 wt% in G/MoS2 electrode were segregated in half for G and MoS2 powders. N-methyl-2-pyrrolidone (NMP) acts as a solvent and Polytetrafluoroethylene (PTFE) provides enhancement of electrical contact of active materials and adhesion to the substrate, which in this research project is Nickel (Ni) foam. Electrodes were fabricated in coin cells underwent electrochemical performance analyses in an aqueous electrolyte of 6M Potassium Hydroxide (KOH) in a battery jig using Wonatech WBCS3000 for cyclic voltammetry (CV) and charge/discharge (CD). Encapsulated from the CV and CD analyses, the CV curves for every scan rate show almost rectangular shape. Maximum current that was archiving through the CV analysis is at 1.5mV/s and current at 1.5A, almost nearing to ideal can be observed from the CD slopes that is linear due to its symmetry curves, which the curve depicts an almost constant pattern at 0.6V.

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