期刊
CARBON
卷 102, 期 -, 页码 455-461出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.12.092
关键词
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资金
- Thailand Research Fund
- Vidyasirimedhi Institute of Science and Technology [RSA5880043]
- Frontier Research Centre at VISTEC
- graduate school Kasetsart University
Nitrogen-doped reduced graphene oxide aerogel (N-rGO aerogel) with high porosity and ionic conductivity were synthesized by a hydrothermal reduction of graphene oxide with hydrazine and following freezing-dry method. N-rGO aerogel was spray-coated on carboxyl-modified carbon fiber paper with a hydrophilic surface and used as the supercapacitor electrode. Not only can the N-rGO aerogel electrode accelerate the diffusion of the electrolyte but also it can store electronic charge via a surface redox reaction due to the N-containing groups. Among the electrolytes studied, the ionic liquid-based supercapacitor of the N-rGO aerogel provides a wide working potential of ca. 4.0 V and rather high specific capacitance of 764.53 F/g at 1 A/g with a capacity retention of 86% over 3000 charge-discharge cycles as well as maximum specific power and energy of 6525.56 W/kg and 245.00 Wh/kg, respectively. The device prototype fabricated in a single coin cell shape (CR2016) can supply electricity to red LED over 17 min. (C) 2016 Elsevier Ltd. All rights reserved.
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