Direct fabrication of 3D graphene on nanoporous anodic alumina by plasma-enhanced chemical vapor deposition
AuthorZhan, H; Garrett, DJ; Apollo, NV; Ganesan, K; Lau, D; Prawer, S; Cervenka, J
Source TitleSCIENTIFIC REPORTS
PublisherNATURE PUBLISHING GROUP
University of Melbourne Author/sGarrett, David; Cervenka, Jiri; Prawer, Steven; Zhan, Hualin; Ganesan, Kumaravelu; LAU, DESMOND; Apollo, Nicholas
Document TypeJournal Article
CitationsZhan, H., Garrett, D. J., Apollo, N. V., Ganesan, K., Lau, D., Prawer, S. & Cervenka, J. (2016). Direct fabrication of 3D graphene on nanoporous anodic alumina by plasma-enhanced chemical vapor deposition. SCIENTIFIC REPORTS, 6 (1), https://doi.org/10.1038/srep19822.
Access StatusAccess this item via the Open Access location
Open Access at PMChttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC4726322
ARC Grant codeARC/DE130100922
High surface area electrode materials are of interest for a wide range of potential applications such as super-capacitors and electrochemical cells. This paper describes a fabrication method of three-dimensional (3D) graphene conformally coated on nanoporous insulating substrate with uniform nanopore size. 3D graphene films were formed by controlled graphitization of diamond-like amorphous carbon precursor films, deposited by plasma-enhanced chemical vapour deposition (PECVD). Plasma-assisted graphitization was found to produce better quality graphene than a simple thermal graphitization process. The resulting 3D graphene/amorphous carbon/alumina structure has a very high surface area, good electrical conductivity and exhibits excellent chemically stability, providing a good material platform for electrochemical applications. Consequently very large electrochemical capacitance values, as high as 2.1 mF for a sample of 10 mm(3), were achieved. The electrochemical capacitance of the material exhibits a dependence on bias voltage, a phenomenon observed by other groups when studying graphene quantum capacitance. The plasma-assisted graphitization, which dominates the graphitization process, is analyzed and discussed in detail.
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