Graphene oxide-based benzimidazole-crosslinked networks for high-performance supercapacitorsElectronic supplementary information (ESI) available: Detailed methods of preparation of GOBINPPA, SEM images, IR spectra, TGA, nitrogen adsorption-desorption isotherms, pore size distribution, gravimetric hydrogen adsorption, carbon dioxide adsorption isotherms, and virial analysis of the adsorption data for GOBIN materials. See DOI: 10.1039/c3nr01480k
The synthesis of graphene oxide (GO)-based benzimidazole-crosslinked network (GOBIN) materials is presented. These materials are prepared by the covalent crosslinking of GO sheets using a condensation reaction between the carboxylic acid moieties on the GO surface and the o -aminophenyl end groups o...
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Main Authors | , , , , |
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Format | Journal Article |
Language | English |
Published |
22.08.2013
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Online Access | Get full text |
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Summary: | The synthesis of graphene oxide (GO)-based benzimidazole-crosslinked network (GOBIN) materials is presented. These materials are prepared by the covalent crosslinking of GO sheets using a condensation reaction between the carboxylic acid moieties on the GO surface and the
o
-aminophenyl end groups of 3,3′-diaminobenzidine (or 1,2,4,5-benzenetetraamine tetrahydrochloride). An efficient one-pot catalyst- and template-free synthesis was performed. The obtained porous GO-based materials possess a Brunauer-Emmett-Teller specific surface area ranging from 260 to 920 m
2
g
−1
. Electrochemical testing indicates that the GOBIN materials display a specific capacitance up to 370 F g
−1
at a current density of 0.1 A g
−1
and about 90% of the original capacitance is retained after 5000 cycles at a current density of 3 A g
−1
. Therefore, GOBIN materials can be employed as promising electrode materials for high-performance supercapacitors with outstanding cycling stability. Furthermore, owing to their significantly high specific surface area, these materials also show hydrogen uptake (up to 1.24 wt%, at 77 K and 1.0 bar) and carbon dioxide capture (up to 14.2 wt%, at 273 K and 1.0 bar) properties. As a result, these GO-based porous materials improve both the supercapacitor performance and gas sorption property, which demonstrate an excellent performance in the practical application of energy storage.
GOBIN materials have been synthesized with a high BET specific surface area, and exhibit high specific capacitances and good cycling stability. |
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Bibliography: | PPA Electronic supplementary information (ESI) available: Detailed methods of preparation of GOBIN 10.1039/c3nr01480k SEM images, IR spectra, TGA, nitrogen adsorption-desorption isotherms, pore size distribution, gravimetric hydrogen adsorption, carbon dioxide adsorption isotherms, and virial analysis of the adsorption data for GOBIN materials. See DOI |
ISSN: | 2040-3364 2040-3372 |
DOI: | 10.1039/c3nr01480k |