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Mesoporous hollow carbons on graphene and their electrochemical properties
- Authors
- Jeong, G. H.; Lee, I.; Kang, J. -G.; Lee, H.; Yoon, S.; Kim, S. -W.
- Issue Date
- 24-Aug-2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.5, no.89, pp 73119 - 73125
- Pages
- 7
- Journal Title
- RSC ADVANCES
- Volume
- 5
- Number
- 89
- Start Page
- 73119
- End Page
- 73125
- ISSN
- 2046-2069
- Abstract
- We report the formation of mesoporous hollow carbons with diameters of about 30-40 nm on a graphene (MHCG) surface formed using graphite, the surfactant Pluronic F-127, and porous silica on the graphene as a template to produce a sheet. The specific surface area of the sample produced is 1793.45 m(2) g(-1), which is hundreds of times larger than that of graphite (31.38 m(2) g(-1)). When applied to supercapacitor electrodes, the MHCG electrode exhibits outstanding maintenance of energy density above 30 W h kg(-1) even under 1 kW kg(-1) power density, which is attributed to extremely fast electron supply through graphene layers and facile penetration of electrolyte through highly-developed mesopores.
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