期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 161, 期 6, 页码 A1090-A1093出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.058406jes
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资金
- Advanced Research Project Agency-E (ARPA-E), Department of Energy (DOE) of the United States [DE-AR0000344]
- MRSEC Program of the NSF [1121053]
- NSF [CHE-0909743]
A significant challenge for energy storage technologies is to realize battery-level energy density and capacitor-level durability and power density in one device. By introducing an electrolyte composed of an anionic catholyte and a cationic anolyte into a symmetric carbon-based supercapacitor configuration, a hybrid electrochemical battery-supercapacitor system using soluble redox species delivers significantly improved energy density from 20 to 42 W.h/kg (based on the electrode mass) and stable capacities for > 10(4) cycles. The ionic species formed in the electrolyte are studied by UV-Vis, Raman and mass spectroscopy to probe the energy storage mechanism. The strategy is general and may provide a route to critically-needed fast-charging devices with both high energy density and power. (C) 2014 The Electrochemical Society. All rights reserved.
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