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Outstanding performance of activated graphene based supercapacitors in ionic liquid electrolyte from −50 to 80°C

Tsai, Wan-Yu and Lin, Rongying and Murali, Shanthi and Zhang, Li Li and McDonough, John K. and Ruoff, Rodney S. and Taberna, Pierre-Louis and Gogotsi, Yury and Simon, Patrice Outstanding performance of activated graphene based supercapacitors in ionic liquid electrolyte from −50 to 80°C. (2013) Nano Energy, 2 (3). 403-411. ISSN 2211-2855

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Official URL: http://dx.doi.org/10.1016/j.nanoen.2012.11.006

Abstract

High specific surface area (SSA ∼2000 m2/g) porous KOH-activated microwave exfoliated graphite oxide (‘a-MEGO’) electrodes have been tested in a eutectic mixture of ionic liquids (1:1 by weight or molar ratio N-methyl-N-propylpiperidinium bis(fluorosulfonyl)imide (PIP13-FSI) and N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR14-FSI)) as electrolyte for supercapacitor applications. By optimizing the carbon/electrolyte system, outstanding capacitive performance has been achieved with high capacitance (up to 180 F/g) and wide electrochemical window (up to 3.5 V) over a wide temperature range from −50 °C to 80 °C. This is the first demonstration of a carbon–ionic liquid system capable of delivering capacitance in excess of 100 F/g below room temperature. The excellent electrochemical response of the proposed couple shows that optimization of the carbon/electrolyte interface is of great importance for improving capacitive energy storage.

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 Nano Energy website : www.sciencedirect.com/science/article/pii/S2211285512002303
HAL Id:hal-01154261
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Drexel University (USA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Réseau de stockage électrochimique de l’énergie - Energie RS2E (FRANCE)
Other partners > University of Texas at Austin (USA)
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Funders:
European Research Council
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Deposited By: cirimat webmestre
Deposited On:21 May 2015 12:41

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