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Vol. 28 No. 1 (2016): Vol 28 Issue 1

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Electrochemical Performance of Graphene/Activated Carbon Based Electric Double Layer Supercapacitors

https://doi.org/10.14233/ajchem.2016.19278
Kefayat Ullah
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam 356-706, Republic of Korea
Asghar Ali
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam 356-706, Republic of Korea
Shu Ye
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam 356-706, Republic of Korea
Lei Zhu
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam 356-706, Republic of Korea
Ick-Jun Kim
Korea Electrotechnology Research Institute, Changwon-si, Kyungnam 641-120, Republic of Korea
Sun-Hye Yang
Korea Electrotechnology Research Institute, Changwon-si, Kyungnam 641-120, Republic of Korea
Won-Chun Oh
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam 356-706, Republic of Korea

Corresponding Author(s) : Won-Chun Oh

wc_oh@hanseo.ac.kr

Asian Journal of Chemistry, Vol. 28 No. 1 (2016): Vol 28 Issue 1

Abstract

We report a facile and environmental friendly strategy for the fabrication of porous graphene/activated carbon (graphene/AC) composites through chemical activation technique by using Li2CO3. The activation process was accomplished by using a pressure dye round by heating mantle at 450 °C for 12 h. The carbonates were considered to decompose under high pressure and temperature in graphene network to produce a porous two-dimensional graphene/activated carbon network. The structures and the properties of graphene/activated carbon composites have been characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry, galvanostatic charge-discharge test. Electrochemical test reveals that the graphene/activated carbon composite has stable capacitance performance at charge-discharge current density of 0.3 A g-1 and excellent capacity retention.

Keywords

Graphene Electrochemical measurements XRD SEM Cyclic voltammetry
Ullah, K., Ali, A., Ye, S., Zhu, L., Kim, I.-J., Yang, S.-H., & Oh, W.-C. (2015). Electrochemical Performance of Graphene/Activated Carbon Based Electric Double Layer Supercapacitors. Asian Journal of Chemistry, 28(1), 133–137. https://doi.org/10.14233/ajchem.2016.19278
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