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Electrolyte based on fluorinated cyclic quaternary ammonium ionic liquids

Electrolyte based on fluorinated cyclic quaternary ammonium ionic liquids Ionic liquids, ILs, based on fluorinated pyrrolidinium and piperidinium ammonium cations and imide anion were prepared and characterized. The physicochemical and electrochemical properties of these ILs including melting point, glass transition and degradation temperatures, viscosity, ionic conductivity, and electrochemical stability were determined and compared to alkyl pyrrolidinium and piperidinium ILs. The incorporation of a CF3 group instead of a CH3 induces an increase of the IL viscosity, thus a conductivity decrease. However, good ionic conductivity is obtained with fluorinated pyrrolidinium IL. Cyclic amine ILs with propyl alkyl chain or fluorinated ammonium exhibit very high electrochemical stability toward oxidation. The effect of the addition of LiTFSI on the IL properties was studied with the same methodology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Electrolyte based on fluorinated cyclic quaternary ammonium ionic liquids

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References (55)

Publisher
Springer Journals
Copyright
Copyright © 2012 by Springer-Verlag
Subject
Chemistry; Condensed Matter Physics; Energy Storage; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-012-0688-x
Publisher site
See Article on Publisher Site

Abstract

Ionic liquids, ILs, based on fluorinated pyrrolidinium and piperidinium ammonium cations and imide anion were prepared and characterized. The physicochemical and electrochemical properties of these ILs including melting point, glass transition and degradation temperatures, viscosity, ionic conductivity, and electrochemical stability were determined and compared to alkyl pyrrolidinium and piperidinium ILs. The incorporation of a CF3 group instead of a CH3 induces an increase of the IL viscosity, thus a conductivity decrease. However, good ionic conductivity is obtained with fluorinated pyrrolidinium IL. Cyclic amine ILs with propyl alkyl chain or fluorinated ammonium exhibit very high electrochemical stability toward oxidation. The effect of the addition of LiTFSI on the IL properties was studied with the same methodology.

Journal

IonicsSpringer Journals

Published: Mar 20, 2012

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