Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2013

Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte

Résumé

The performances obtained with methoxypropionitrile/ethylene carbonate mixture based electrolytes were investigated in supercapacitor application. The incorporation of methoxypropionitrile allows a good compromise between electrochemical performances and safety issue to be exhibited in a wide temperature range. This improvement is associated with the decrease of electrolyte viscosity without compromising the salt solubility and dissociation. The highest conductivity values, 20 mS cm−1 at 30 °C compared to 14 mS cm−1 in PC (propylene carbonate), were obtained with both 1 M tetraethylammonium tetrafluoroborate (TEABF4) and spiro-(1,1′)-bipyrrolidium tetrafluoroborate (SBPBF4) salts. Bulk liquid state was conserved for these electrolytes in a wide temperature range. Then, interesting electrolyte conductivities were obtained at low temperature (5.2 mS cm−1 at −25 °C) which is twice that of PC + TEABF4 1 M electrolyte at the same conditions. Moreover, the capacitor performance of EC/MP based electrolyte is better than PC one at room temperature.

Domaines

Chimie

Dates et versions

hal-01884288 , version 1 (30-09-2018)

Identifiants

Citer

E. Perricone, M. Chamas, L. Cointeaux, J.-C. Leprêtre, P. Judeinstein, et al.. Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte. Electrochimica Acta, 2013, 93, pp.1 - 7. ⟨10.1016/j.electacta.2013.01.084⟩. ⟨hal-01884288⟩
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