Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 537, Issue -, Pages 57-65Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.11.007
Keywords
Three dimensional; Co-doped graphene; Gas foaming; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [21673086, 51578556]
- Scientific and Technological Plan of Guangdong Province [2014A020216009]
- Natural Science Foundation of Guangdong Province, China [2015A030313376, 2015A030308005]
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Inspired by steaming bread, a novel three dimensional N and S co-doped reduced graphene oxide (3D NS-rGO) foam is fabricated via a gas foaming method similar to steaming bread procedure, in which (NH4)(2)S2O3 is selected as the foaming agent as well as N and S source. Such cross-linked 3D structure not only has the high specific surface area also enable more transport channels for electrons/ions transport. Furthermore, introducing of N and S-containing functional groups creates lattice defects in graphene, which provides more active sites where the Faradaic pseudocapacitance occurs. Consequently, the electrochemical test of 3D NS-rGO sample in a three-electrode system demonstrates a high specific capacity of 306.3 F g(-1) at 1 A g(-1), two times higher than that of rGO prepared at the same temperature. Moreover, 3D NS-rGO sample reveals the superb cycling stability with less than 2% capacitance loss after 10,000 cycles and it exhibits potential application for high performance supercapacitors. (C) 2018 Elsevier Inc. All rights reserved.
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