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Graphene-Based Supercapacitors Using Eutectic Ionic Liquid Mixture Electrolyte

Lin, Zifeng and Taberna, Pierre-Louis and Simon, Patrice Graphene-Based Supercapacitors Using Eutectic Ionic Liquid Mixture Electrolyte. (2016) Electrochimica Acta, 206. 446-451. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2015.12.097

Abstract

Compact graphene films were prepared and electrochemically tested at various temperatures in a eutectic of ionic liquid mixture (1:1 by weight or mole N-methyl-N-propylpiperidinium bis(fluorosulfonyl)imide and N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide) electrolyte. A large temperature window from -30 °C to 80 °C was achieved together with a large potential window of 3.5 V at room temperature and below. A maximum gravimetric capacitance of 175 F.g−1 (85 mAh.g−1) was obtained at 80 °C. 130 F.g−1 (63 mAh.g−1) and 100 F.g−1 (49 mAh.g−1) were still delivered at -20 °C and -30 °C respectively. Besides, a volumetric capacitance of 50 F.cm−3 was achieved with a thick graphene film (60 μm). The outstanding performance of such compact graphene film in the eutectic ionic liquid mixture electrolyte makes it a promising alternative to activated carbon for supercapacitor applications, especially under extreme temperature conditions.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01466485
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)
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Deposited By: cirimat webmestre
Deposited On:13 Feb 2017 15:04

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