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

Rahúl SinghalCentral Connecticut State University 1 , New Britain, Connecticut 06050, USAD. J. ThorneCentral Connecticut State University 1 , New Britain, Connecticut 06050, USAPeter K. LeMaireCentral Connecticut State University 1 , New Britain, Connecticut 06050, USAXavier MartinezDepartment of Chemistry, Pittsburg State University 2 , Pittsburg, Kansas 66762, USAChen ZhaoDepartment of Chemistry, Pittsburg State University 2 , Pittsburg, Kansas 66762, USARam K. GuptaDepartment of Chemistry, Pittsburg State University 2 , Pittsburg, Kansas 66762, USADavid UhlConnecticut State Colleges and Universities (CSCU) Center for Nanotechnology, Southern Connecticut State University 3 , New Haven, Connecticut 06515, USAEllen ScanleyConnecticut State Colleges and Universities (CSCU) Center for Nanotechnology, Southern Connecticut State University 3 , New Haven, Connecticut 06515, USAC. BroadbridgeConnecticut State Colleges and Universities (CSCU) Center for Nanotechnology, Southern Connecticut State University 3 , New Haven, Connecticut 06515, USARakesh K. SharmaDepartment of Chemistry, Indian Institute of Technology Jodhpur 4 , NH-62, Karwar, Jodhpur 342037, Rajasthan, India

2020en

ABI

Annotatsiya

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.

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Identifikatorlar

DOI: 10.1063/1.5132713

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