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Synthesis and characterization of CuS, CuS/graphene oxide nanocomposite for supercapacitor applications

Supercapacitors or electrochemical capacitors are receiving greater interest because of their high-power density, long life, and low maintenance. We have synthesized CuS nanoparticles and graphene oxide (CuS–GO) nanocomposites for supercapacitor applications because of their low cost and excellent e...

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Published in:AIP advances 2020-03, Vol.10 (3), p.035307-035307-8
Main Authors: Singhal, Rahul, Thorne, David, LeMaire, Peter K., Martinez, Xavier, Zhao, Chen, Gupta, Ram K., Uhl, David, Scanley, Ellen, Broadbridge, Christine C., Sharma, Rakesh K.
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description Supercapacitors or electrochemical capacitors are receiving greater interest because of their high-power density, long life, and low maintenance. We have synthesized CuS nanoparticles and graphene oxide (CuS–GO) nanocomposites for supercapacitor applications because of their low cost and excellent electrochemical properties. The phase purity of each material was determined using powder XRD studies. The bandgap was determined by UV-visible spectrophotometric studies. Scanning electron microscope and transmission electron microscope images revealed the nano-scale morphology of the synthesized particles. All the electrochemical measurements were conducted in a standard three-electrode configuration, using a platinum wire as the counter electrode and Hg/HgO as the reference electrode. CuS and its composites with graphene oxide on nickel foam were used as working electrodes. All the electrochemical measurements were performed in 3M KOH solution. The CuS–GO nanocomposite electrode showed a specific capacitance of 250 F/g, 225 F/g, 182 F/g, 166 F/g, 161 F/g, and 158 F/g at a current density of 0.5 A/g, 1 A/g, 5 A/g, 10 A/g, 15 A/g, and 20 A/g, respectively. CuS–GO electrodes showed a specific capacitance retention of 70% after 5000 charge–discharge cycles at a current density of 5 A/g.
doi_str_mv 10.1063/1.5132713
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subjects Capacitance
Copper sulfides
Current density
Electrochemical analysis
Electrodes
Electron microscopes
Graphene
Image transmission
Metal foams
Morphology
Nanocomposites
Nanoparticles
Platinum
Spectrophotometry
Supercapacitors
Synthesis
title Synthesis and characterization of CuS, CuS/graphene oxide nanocomposite for supercapacitor applications
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