Supercapacitors for their high specific power are playing a crucial role in transportation, where they can be coupled with lithium batteries or fuel cells to provide power peaks during acceleration as well as for energy recovery during braking of electric vehicles. For this application the typical operating temperature is higher than RT. Thus, we pursued the strategy of using ionic liquids (ILs) of high thermal stability, wide electrochemical stability window and good conductivity as “solvent-free” electrolytes in supercapacitors for electric vehicle applications. We already demonstrated the viability of this strategy in hybrid supercapacitors with activated carbon (AC) as the negative electrode and poly(3-methylthiophene) (pMeT) as the positive. At 60 °C AC/IL/pMeT supercapacitors provide maximum cell voltages higher than 3.4V as well as long cycling stability over 15,000 cycles when a high purity and hydrophobic IL such as N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) is used. This very interesting result was achieved with commercial electrode materials and we demonstrated that improvements in such IL-based hybrid supercapacitors are feasible via optimization of the affinity of electrode materials for the ILs. In the present paper we present and discuss results on the development of materials with morphologies and surface chemistry tailored for operation at 60°C in hydrophobic ILs. Particularly data on mesoporous cryogel carbons and pMeT synthesized in the frame of the ILHYPOS “Ionic Liquid-based Hybrid Power Supercapacitors” UE Project are reported and discussed.

Electrode materials for ionic liquid-based supercapacitors / C. Arbizzani; A. Balducci; S. Beninati; M. Lazzari; F. Soavi; M. Mastragostino. - STAMPA. - (2006), pp. 520-520. (Intervento presentato al convegno IMLB2006-International Meeting on Lithium Batteries tenutosi a Biarritz nel 18-23/06/06).

Electrode materials for ionic liquid-based supercapacitors

ARBIZZANI, CATIA;SOAVI, FRANCESCA;MASTRAGOSTINO, MARINA
2006

Abstract

Supercapacitors for their high specific power are playing a crucial role in transportation, where they can be coupled with lithium batteries or fuel cells to provide power peaks during acceleration as well as for energy recovery during braking of electric vehicles. For this application the typical operating temperature is higher than RT. Thus, we pursued the strategy of using ionic liquids (ILs) of high thermal stability, wide electrochemical stability window and good conductivity as “solvent-free” electrolytes in supercapacitors for electric vehicle applications. We already demonstrated the viability of this strategy in hybrid supercapacitors with activated carbon (AC) as the negative electrode and poly(3-methylthiophene) (pMeT) as the positive. At 60 °C AC/IL/pMeT supercapacitors provide maximum cell voltages higher than 3.4V as well as long cycling stability over 15,000 cycles when a high purity and hydrophobic IL such as N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) is used. This very interesting result was achieved with commercial electrode materials and we demonstrated that improvements in such IL-based hybrid supercapacitors are feasible via optimization of the affinity of electrode materials for the ILs. In the present paper we present and discuss results on the development of materials with morphologies and surface chemistry tailored for operation at 60°C in hydrophobic ILs. Particularly data on mesoporous cryogel carbons and pMeT synthesized in the frame of the ILHYPOS “Ionic Liquid-based Hybrid Power Supercapacitors” UE Project are reported and discussed.
2006
IMLB2006-International Meeting on Lithium Batteries
520
520
Electrode materials for ionic liquid-based supercapacitors / C. Arbizzani; A. Balducci; S. Beninati; M. Lazzari; F. Soavi; M. Mastragostino. - STAMPA. - (2006), pp. 520-520. (Intervento presentato al convegno IMLB2006-International Meeting on Lithium Batteries tenutosi a Biarritz nel 18-23/06/06).
C. Arbizzani; A. Balducci; S. Beninati; M. Lazzari; F. Soavi; M. Mastragostino
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/37037
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