Journal
JOURNAL OF POWER SOURCES
Volume 185, Issue 2, Pages 1575-1579Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2008.09.016
Keywords
Ionic liquid; Double-layer supercapacitor; Hybrid supercapacitor; Activated carbon; Poly(3-methylthiophene); Power-assisted HEV
Funding
- European Commission in the Sixth Framework Programme
- Sub-programme Sustainable Surface Transport [TST4-CT-2005-518307]
- (Project ILHYPOS Ionic Liquid-based Hybrid Supercapacitor)
- Evonik Industries provided PYR1(201)TFSI
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Safety is the main concern for energy storage-system application in hybrid-electrical vehicles (HEVs) and ionic liquids (Ls) of low vapor pressure and high thermal stability represent a strategy to meet this key requisite. The use of solvent-free ILs in supercapacitors enables the high cell voltages required for increasing supercapacitor energy LIP to the values for power-assist application in HEVs. In order to exploit the wide electrochemical stability window of ILs, tailored electrode materials and cell configurations have to be used. The performance of asymmetric double-layer carbon supercapacitors (AEDLCs) and carbon/poly(3-methylthiophene) hybrid supercapacitors operating with different pyrrolidinium-based ILs are reported and compared. This study demonstrates that a design-optimized AEDLC operating with safe, solvent-free IL electrolyte meets cycling stability and the energy and power requisites for power-assisted HEVs at the investigated temperatures. (C) 2008 Elsevier B.V. All rights reserved.
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