Safe, high-energy supercapacitors based on solvent-free ionic liquid electrolytes

Safety is the main concern for energy storage-system application in hybrid-electrical vehicles (HEVs) and ionic liquids (ILs) 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 voltage...

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Bibliographic Details
Published in:Journal of power sources 2008-12, Vol.185 (2), p.1575-1579
Main Authors: Arbizzani, Catia, Biso, Maurizio, Cericola, Dario, Lazzari, Mariachiara, Soavi, Francesca, Mastragostino, Marina
Format: Article
Language:English
Subjects:
Activated carbon
Applied sciences
Capacitors
Capacitors. Resistors. Filters
Carbon
Double-layer supercapacitor
Electrical engineering. Electrical power engineering
Electrolytes
Electrolytic cells
Exact sciences and technology
Hybrid supercapacitor
Hybrid vehicles
Ionic liquid
Ionic liquids
Poly(3-methylthiophene)
Power-assisted HEV
Stability
Supercapacitors
Various equipment and components
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Summary:Safety is the main concern for energy storage-system application in hybrid-electrical vehicles (HEVs) and ionic liquids (ILs) 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 up 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.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2008.09.016