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http://dx.doi.org/10.5695/JKISE.2019.52.3.123

Effect of Hydrogen in Rapid Thermal Annealing on the Graphene-Zinc Oxide Electrode 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.52, no.3, 2019 , pp. 123-129 More about this Journal
Abstract
With recent demand for the renewable energy resources, we conducted a research on the energy conversion and storage device of supercapacitor. The hybrid graphene-zinc oxide(GZO) electrodes for the supercapacitors (SCs) were fabricated and investigated. To increase the electrical conductivity of the GZO electrode, the rapid thermal annealing(RTA) in $Ar/H_2$(10%) atmosphere was applied and the effect was examined by comparing it with RTA at Ar atmosphere. In Raman spectroscopy, the electrodes annealed at 400? in $Ar/H_2$ atmosphere showed a lower ratio of D/G peak than that of annealed at Ar atmosphere, and had a larger specific capacitance(Sc) in the cyclic voltammetry(CV), and a lower the equivalent series resistance(ESR) in the electrochemical impedance spectroscopy(EIS). The reason seems to come from the better mixing of the graphene and zinc oxide by the RTA in $Ar/H_2$(10%).
Keywords
Graphene; Graphene oxide; Hydrogen; Supercapacitor; Rapid thermal annealing;
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