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http://dx.doi.org/10.5695/JKISE.2020.53.5.213

Electrochemical Property of the Composite Electrode with Graphene Balls and Graphene Oxide for Supercapacitor  

Jeong, Woo-Jun (School of Energy, Materials & Chemical Engineering Korea University of Technology and Education)
Oh, Ye-Chan (School of Energy, Materials & Chemical Engineering Korea University of Technology and Education)
Kim, Sang-Ho (School of Energy, Materials & Chemical Engineering Korea University of Technology and Education)
Publication Information
Journal of the Korean institute of surface engineering / v.53, no.5, 2020 , pp. 213-218 More about this Journal
Abstract
Composite material of the graphene ball (GB) inserted graphene oxide (GO) sheet for a supercapacitor electrode was studied. Chemical vapor deposition (CVD) process used to make GBs on the silicon oxide nanoparticles. The GBs mixed into the GO sheets to make GOGB and reduced it to create a reduced GOGB(RGOGB) composite. The RGOGB composite electrode had a large surface area and improved electrochemical properties. Specific capacitance of the RGBGO composite electrode was higher over 20 times than a pure GO and GOGB electrode in cyclic voltammetry(CV) tests, and the Z' and Z" impedance measured by an electrochemical impedance spectrometry(EIS) also low. So, the RGBGO composite electrode would use effectively to expand a performance of supercapacitor.
Keywords
Graphene; Graphene oxide; Graphene balls; Supercapacitor;
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