Abstract
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.
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Acknowledgements
This work was supported by the Individual Basic Science and Engineering Research Program through the National Research Foundation (NRF) of Korea, and funded by the MOE (Ministry of Education), Korea (Grant No. NRF-2018R1D1A1B07047857).
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Hong, JH., Jung, Y. & Kim, S. Preparation of reduced graphene oxide electrodes treated by electron beam irradiation and their electrochemical behaviors. Res Chem Intermed 45, 2715–2726 (2019). https://doi.org/10.1007/s11164-019-03759-7
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DOI: https://doi.org/10.1007/s11164-019-03759-7