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Title: Benzoxazole and benzimidazole heterocycle-grafted graphene for high-performance supercapacitor electrodes
Authors: Ai, Wei
Zhou, Weiwei
Du, Zhuzhu
Du, Yaping
Zhang, Hua
Jia, Xingtao
Xie, Linghai
Yi, Ming-Dong
Yu, Ting
Huang, Wei
Issue Date: 2012
Source: Ai, W., Zhou, W., Du, Z., Du, Y., Zhang, H., Jia, X., et al. (2012). Benzoxazole and benzimidazole heterocycle-grafted graphene for high-performance supercapacitor electrodes. Journal of Materials Chemistry, 22(44), 23439-23446.
Series/Report no.: Journal of materials chemistry
Abstract: An efficient method for the preparation of benzoxazole and benzimidazole covalently grafted graphene and their application as high performance electrode materials for supercapacitors is reported. The synthesis of such covalently functionalized graphene materials first involves a cyclization reaction of carboxylic groups on graphene oxide with the hydroxyl and aminos groups on o-aminophenol and o-phenylenediamine, and subsequent reduction by hydrazine. Results of Fourier transformed infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) have confirmed that the covalent functionalization of graphene is achieved through the formation of benzoxazole and benzimidazole on the graphene sheets. The functionalized graphene materials are revealed to consist of corrugation and scrolling morphologies with less aggregation, indicating the effectiveness of functionalization in preventing restacking/aggregation of the graphene sheets. Furthermore, when applied as supercapacitor electrodes, the functionalized graphene materials exhibit good electrochemical performances in terms of high specific capacitance (730 and 781 F g−1 for benzoxazole and benzimidazole grafted graphene, respectively, at a current density of 0.1 A g−1) and good cycling stability, implying their potential for energy storage applications.
DOI: 10.1039/c2jm35234f
Rights: © 2012 Royal Society of Chemistry
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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