Enhanced specific capacitance by a new dual redox-active electrolyte in activated carbon-based supercapacitors

doi:10.1016/j.carbon.2018.11.033

SIC OpenIR

	Enhanced specific capacitance by a new dual redox-active electrolyte in activated carbon-based supercapacitors
	Wang, Yuan; Chang, Zheng; Qian, Meng; Zhang, Zhichao; Lin, Jie; Huang, Fuqiang
	2019-03-01
Source Publication	CARBON
ISSN	0008-6223
Volume	143 Pages:300
Subtype	Article
Abstract	Commercial electrochemical capacitors exhibit high power density and long cycle life but suffer from low energy density due to low specific capacitance of activated carbon (< 200 F g(-1)). Redox-enhanced electrochemical capacitors achieve higher specific energy by adding redox-active ingredients to the electrolyte, which provide additional faradaic pseudo-capacitance. Here, high-performance and stable aqueous redox electrochemical capacitors using a new dual-active electrolyte is developed, and the specific capacitance of activated carbon increases to 885 F g(-1) after adding 0.05M FeBr3 with no degradation over 10,000 cycles in a two-electrode cell, which is more than four-fold of the original capacitance of 204 F g(-1). In addition, PVA was introduced to the electrolyte and proved to be a useful way to increase the coulombic efficiency. Moreover, this new energy storage system delivers high specific energy of 40Wh kg(-1) in 0.5M Na2SO4 based on the mass of electrodes. (C) 2018 Elsevier Ltd. All rights reserved.
Keyword	Electric double-layer capacitors Redox-active electrolyte FeBr3
DOI	10.1016/j.carbon.2018.11.033
Language	英语
WOS Research Area	Chemistry ; Materials Science
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27318
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Wang, Yuan,Chang, Zheng,Qian, Meng,et al. Enhanced specific capacitance by a new dual redox-active electrolyte in activated carbon-based supercapacitors[J]. CARBON,2019,143:300.
APA	Wang, Yuan,Chang, Zheng,Qian, Meng,Zhang, Zhichao,Lin, Jie,&Huang, Fuqiang.(2019).Enhanced specific capacitance by a new dual redox-active electrolyte in activated carbon-based supercapacitors.CARBON,143,300.
MLA	Wang, Yuan,et al."Enhanced specific capacitance by a new dual redox-active electrolyte in activated carbon-based supercapacitors".CARBON 143(2019):300.

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