Journal
CHINESE SCIENCE BULLETIN
Volume 57, Issue 23, Pages 3045-3050Publisher
SCIENCE PRESS
DOI: 10.1007/s11434-012-5256-2
Keywords
graphene; electrochemical reduction; electrochemical double-layer capacitor; electrode material
Categories
Funding
- Chinese Academy of Sciences [KJCX2-YW-W26]
- Beijing Municipal Science and Technology Commission [Z111100056011007]
- National Natural Science Foundation of China [21001103, 51025726]
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Graphene oxide (GO) film was electrochemically reduced by a cyclic voltammetry technique in 6 mol L-1 KOH aqueous solution. Electrochemically reduced graphene oxide (ER-GO) film was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscopy, and Raman spectroscopy. The oxygen content (with the O/C atomic ratio of 1.29%) was significantly decreased after electrochemical reduction. The ER-GO film exhibited a specific capacitance of 152 F g(-1) at the current density of 5 A g(-1) and a good rate capability. Furthermore, the ER-GO film showed an excellent cycling ability. The capacitance retention remained 99% after 3000 cycles at the current density of 10 A g(-1).
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