期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 32, 页码 12924-12930出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta01309c
关键词
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资金
- Singapore National Research Foundation under NRF RF Award [NRFRF2010-07]
- A*Star SERC PSF grant [1321202101]
- MOE Tier 2 [MOE2012-T2-2-049]
- Singapore MOE under AcRF Tier 2 [MOE2013-T2-1-034]
- AcRF Tier 1 [RG 61/12]
- Start-Up Grant in NTU [M4080865.070.706022]
- Singapore National Research Foundation
- publication is supported under the Campus for Research Excellence and Technological Enterprise (CREATE) programme (Nanomaterials for Energy and Water Management)
A facile and effective method for the synthesis of redox-crosslinked graphene networks is reported. This method involves the polyphosphoric acid-catalyzed cyclization reaction between the carboxylic groups on graphene oxide and the hydroxyl, amino groups on 4,6-diaminoresorcinol hydrochloride, as well as a subsequent reduction process. The obtained benzobisoxazole-crosslinked graphene networks (BBO-GNs) show a high BET surface area of 357 m(2) g(-1) in comparison with the reduced graphene oxide (rGO) (117 m(2) g(-1)), due to the presence of benzobisoxazole groups that prevent the irreversible restacking or agglomeration of graphene sheets during the reduction. Another immediate and more practically meaningful benefit of introducing benzobisoxazole groups is that such functional groups could effectively provide an extra contributing channel to the specific capacity by pseudocapacitance. As a consequence, the improved performance such as significantly enhanced electrochemical capacitance is clearly demonstrated in the supercapacitor with the electrodes of BBO-GNs.
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