期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 12, 期 3, 页码 414-417出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.01.007
关键词
Energy density; Supercapacitors; Pseudo-capacitance; Nanoporous carbon; Protic ionic liquids
资金
- European Community [MIF1-CT-2006-040491]
- Norit (The Netherlands)
Protic ionic liquids (PILs) were used as novel electrolyte for carbon-based supercapacitors. The cyclic voltammograms in three-electrode cells show reversible redox humps, revealing pseudo-faradaic charge transfer. Oxidative treatment of activated carbon enriches the surface functionality and leads to a higher capacitance owing to a stronger pseudo-faradaic contribution. The capacitors using PILs demonstrate a higher voltage window than with aqueous H2SO4, while keeping the same values of capacitance, and being able to operate at lower temperature. A combination of activated carbons and PILs holds promise for improving the energy characteristics of supercapacitors. (C) 2010 Elsevier B.V. All rights reserved.
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