Layer-dependent supercapacitance of graphene films grown by chemical vapor deposition on nickel foam
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Physical Sciences and Engineering (PSE) Division
Chemical and Biological Engineering Program
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AbstractHigh-quality, large-area graphene films with few layers are synthesized on commercial nickel foams under optimal chemical vapor deposition conditions. The number of graphene layers is adjusted by varying the rate of the cooling process. It is found that the capacitive properties of graphene films are related to the number of graphene layers. Owing to the close attachment of graphene films on the nickel substrate and the low charge-transfer resistance, the specific capacitance of thinner graphene films is almost twice that of the thicker ones and remains stable up to 1000 cycles. These results illustrate the potential for developing high-performance graphene-based electrical energy storage devices. © 2012 Elsevier B.V. All rights reserved.
SponsorsThe authors thank Dr. Lan Zhao, Ali R. Behzad and Yang Yang from King Abdullah University of Science and Technology (KAUST) core facilities lab for their help with SEM and Raman measurements. This work was supported by the faculty distribution fund of KAUST.
JournalJournal of Power Sources