Sulfonium Bis(trifluorosulfonimide) Plastic Crystal Ionic Liquid as an Electrolyte at Elevated Temperature for High-Energy Supercapacitors - Physico-chimie des Matériaux et des Electrolytes pour l'Energie Laboratoire - - EA 6299 Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry C Année : 2012

Sulfonium Bis(trifluorosulfonimide) Plastic Crystal Ionic Liquid as an Electrolyte at Elevated Temperature for High-Energy Supercapacitors

Résumé

This study describes the use of the ionic liquid trimethylsulfonium bis(trifluorosulfonimide) [Me3S][TFSI] as an electrolyte for carbon-based supercapacitors at temperatures up to 80 °C. [Me3S][TFSI] is synthesized by a metathesis reaction, possesses a low melting point (Tm = 45.5 °C), and presents crystal plastic behavior indicated by a strong organizational structure with many possible conformations corresponding to several solid–solid phase transitions TS–S. Furthermore, [Me3S][TFSI] is thermally stable up to T = 280 °C and presents a high conductivity up to 20.42 mS cm–1 at 80 °C and a low viscosity, 3 mPa s, at the same temperature. The combination of a good cycling ability with high capacities up to 150 F g–1 at elevated voltage and temperature, i.e., ΔE = 3 V, T = 80 °C, enables the realization of supercapacitors with high specific energies at high temperatures.
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Dates et versions

hal-02055477 , version 1 (04-03-2019)

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Meriem Anouti, Laure Timperman, Mostafa El Hilali, Aurelien Boisset, Hervé Galiano. Sulfonium Bis(trifluorosulfonimide) Plastic Crystal Ionic Liquid as an Electrolyte at Elevated Temperature for High-Energy Supercapacitors. Journal of Physical Chemistry C, 2012, 116 (17), pp.9412-9418. ⟨10.1021/jp3012987⟩. ⟨hal-02055477⟩
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