Preparation of reduced graphene oxide electrodes treated by electron beam irradiation and their electrochemical behaviors

We have demonstrated the preparation of reduced graphene oxide (RGO) using a two-step synthesis by a modified Hummer’s method and borohydride reduction. To study effect of electron beam irradiation to RGO-based electrodes, the samples were prepared by changing the exposure dose of radiation. The str...

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Bibliographic Details
Published in:Research on chemical intermediates 2019-05, Vol.45 (5), p.2715-2726
Main Authors: Hong, Ji-Hwa, Jung, Yongju, Kim, Seok
Format: Article
Language:English
Subjects:
Capacitance
Catalysis
Chemistry
Chemistry and Materials Science
Electrochemical analysis
Electrodes
Electron beams
Electron irradiation
Electrons
Energy storage
Fourier transforms
Graphene
Infrared spectroscopy
Inorganic Chemistry
Morphology
Physical Chemistry
Radiation dosage
Scanning electron microscopy
X-ray diffraction
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Summary:We have demonstrated the preparation of reduced graphene oxide (RGO) using a two-step synthesis by a modified Hummer’s method and borohydride reduction. To study effect of electron beam irradiation to RGO-based electrodes, the samples were prepared by changing the exposure dose of radiation. The structure and morphology analysis was performed by scanning electron microscopy, Fourier transform infra-red spectroscopy (FT-IR) and X-ray diffraction. Electrochemical properties were characterized by cyclic voltammetry and galvanostatic charge–discharge tests were performed in 6 M KOH. The maximum specific capacitance of 200 kGy RGO at a current density of 1 A/g was 273.5 F/g. The RGO electrode irradiated by electron beam with the dose of 200 kGy showed the best energy storage performance such as high capacitance and good rate capability. As a result of this study, the RGO irradiated by an electron beam showed superior capacitance than did pristine RGO.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-019-03759-7