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Characterization of commercial supercapacitors for low temperature applications

Iwama, Etsuro and Taberna, Pierre-Louis and Azais, Philippe and Brégeon, Laurent and Simon, Patrice Characterization of commercial supercapacitors for low temperature applications. (2012) Journal of Power Sources, 219. 235-239. ISSN 0378-7753

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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2012.07.029

Abstract

Electrochemical characterizations at low temperature and floating tests have been performed on 600F commercial supercapacitor (SC) for acetonitrile (AN)-based and AN + methyl acetate (MA) mixed electrolytes. From −40 to +20 °C, AN electrolyte showed slightly higher capacitance than those of AN + MA mixed electrolytes (25 and 33 vol.% of MA). At −55 °C, however, AN electrolyte did not cycle at all, while MA mixed electrolyte normally cycled with a slight decrease in their capacitance. From electrochemical impedance spectroscopy measurements, the whole resistance for AN-based cells at −55 °C was found to be about 10,000 times higher than that of +20 °C, while a 40-fold increase in the cell resistance was obtained for the MA mixture between 20 and −55 °C. From the results of floating tests at 2.7 V and 60 °C for 1 month, the 25 vol.% MA mixture showed no change and slight decreased but stable capacitance.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Power Sources website : http://www.sciencedirect.com/science/article/pii/S0378775312011548
HAL Id:hal-01153244
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Groupe Bolloré (FRANCE)
Other partners > Réseau de stockage électrochimique de l’énergie - Energie RS2E (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:19 May 2015 12:01

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