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http://dx.doi.org/10.12925/jkocs.2016.33.3.593

Development of flexible energy storage device based on reduced graphene oxide (rGO)/single-walled carbon nanotubes (SWNTs) composite  

Yoo, Yeong Hwan (Department of Chemical Engineering, Daejin University)
Cho, Jae Bong (Department of Chemical Engineering, Daejin University)
Kim, Yong Ryeol (Department of Chemical Engineering, Daejin University)
Jeong, Hyeon Taek (Department of Chemical Engineering, Daejin University)
Publication Information
Journal of the Korean Applied Science and Technology / v.33, no.3, 2016 , pp. 593-598 More about this Journal
Abstract
We report on the preparation of reduced graphene oxide (rGO)/single-walled carbon nanotubes (SWNTs) electrodes deposited onto flexible polyethylene terephthalate (PET) via spray coating technique. The highest capacitance value of the unbent rGO/SWNTs electrode was $82Fg^{-1}$ in 1 M $H_2SO_4$ at $100mVs^{-1}$, which decreased to $38Fg^{-1}$ after 500 bending cycle. Further characterization, including galvanostatic charge/discharge measurements and electrochemical impedance spectroscopy (EIS), showed that the rGO/SWNTs electrode retained a well-defined capacitive response after repetitive bending cycle. Overall, the rGO/SWNTs composite electrode showed reasonable electrochemical properties even prolonged bending cycle. Approximately 50% of the initial capacitance for the rGO/SWNTs composite electrode is remained after 500 bending cycle, making the electrode a potential option for flexible energy storage applications.
Keywords
Reduced graphene oxide (rGO); single-walled carbon nanotubes (SWNTs); spray coating; flexible; polyethylene terephthalate(PET);
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