Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 39, Pages 10898-10905Publisher
WILEY-BLACKWELL
DOI: 10.1002/chem.201100727
Keywords
carbon; graphene; nanostructures; nickel; supercapacitors
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Funding
- China Postdoctoral Science Foundation [20100481401]
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We report the preparation of a nickel-foam-supported graphene sheet/porous NiO hybrid film by the combination of electrophoretic deposition and chemical-bath deposition. The obtained graphene-sheet film of about 19 layers was used as the nanoscale substrate for the formation of a highly porous NiO film made up of interconnected NiO flakes with a thickness of 10-20 nm. The graphene sheet/porous NiO hybrid film exhibits excellent pseudocapacitive behavior with pseudocapacitances of 400 and 324 Fg(-1) at 2 and 40 Ag(-1), respectively, which is higher than those of the porous NiO film (279 and 188 F g(-1) at 2 and 40 Ag(-1)). The enhancement of the pseudocapacitive properties is due to reinforcement of the electrochemical activity of the graphene-sheet film.
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