This contribution deals with the results on asymmetric double-layer carbon supercapacitors obtained in the frame of an EU Project (the ILHYPOS Project) which involving four research groups (University of Bologna in Italy, the Universities Paul Sabatier and CNAM in France and ENEA which coordinated the Project ) and four Companies (Evonic and Leclanchè lithium in Germany and Arcotronic and Microvett in Italy). The target of the ILHYPOS project was the increase of the specific energy of the supercapacitors over the commercial ones still maintaining high specific power and long cycle life, for HEV applications and the core of this project is the use of solvent free- IL electrolyte. The strategies we pursued have been: i) the increase of maximum cell voltage over 3.5V by the use of solvent free ionic liquids, which are room temperature molten salts of low vapor pressure, no flammable, of high thermal and chemical stability, and wide electrochemical stability matched with high ionic conductivity; ii) the development of an asymmetric cell configuration with carbon electrodes of different weight for high maximum cell voltage; iii) the increase of supercapacitor specific capacitance by the use of capacitive carbons of optimized porosity and surface chemistry for high wettability by IL. The use of PYR1(2O1)TFSI IL in AEDLC is a powerful strategy to develop safe, high-voltage supercapacitors both for 10s and 2s applications in HEVs. For their very high specific energy, these supercapacitors may be even used for new applications requiring high energy storage capability. Novel carbon electrode materials tailored for IL already under study will further improve the performance of these IL-based AEDLCs.

Double layer supercapacitors for HEV applications

MASTRAGOSTINO, MARINA;ARBIZZANI, CATIA;SOAVI, FRANCESCA
2009

Abstract

This contribution deals with the results on asymmetric double-layer carbon supercapacitors obtained in the frame of an EU Project (the ILHYPOS Project) which involving four research groups (University of Bologna in Italy, the Universities Paul Sabatier and CNAM in France and ENEA which coordinated the Project ) and four Companies (Evonic and Leclanchè lithium in Germany and Arcotronic and Microvett in Italy). The target of the ILHYPOS project was the increase of the specific energy of the supercapacitors over the commercial ones still maintaining high specific power and long cycle life, for HEV applications and the core of this project is the use of solvent free- IL electrolyte. The strategies we pursued have been: i) the increase of maximum cell voltage over 3.5V by the use of solvent free ionic liquids, which are room temperature molten salts of low vapor pressure, no flammable, of high thermal and chemical stability, and wide electrochemical stability matched with high ionic conductivity; ii) the development of an asymmetric cell configuration with carbon electrodes of different weight for high maximum cell voltage; iii) the increase of supercapacitor specific capacitance by the use of capacitive carbons of optimized porosity and surface chemistry for high wettability by IL. The use of PYR1(2O1)TFSI IL in AEDLC is a powerful strategy to develop safe, high-voltage supercapacitors both for 10s and 2s applications in HEVs. For their very high specific energy, these supercapacitors may be even used for new applications requiring high energy storage capability. Novel carbon electrode materials tailored for IL already under study will further improve the performance of these IL-based AEDLCs.
2009
BEST 2009- BATTERIES & ELECTRIC STORAGE TECHNOLOGY CONFERENCE & EXPO
1
1
M. Mastragostino; C. Arbizzani; M. Lazzari; F. Soavi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/85950
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