Lithium solvation in a PMMA membrane plasticized by a lithium-conducting ionic liquid based on 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide
Langue
en
Article de revue
Ce document a été publié dans
Journal of Raman Spectroscopy. 2008, vol. 39, n° 9, p. 1189-1194
Wiley
Résumé en anglais
The Raman and Infrared (IR) spectra of poly(methyl methacrylate) (PMMA) membranes plasticized by ionic liquids of the (1 - x)[1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMITFSI)],xLiTFSI type, where ...Lire la suite >
The Raman and Infrared (IR) spectra of poly(methyl methacrylate) (PMMA) membranes plasticized by ionic liquids of the (1 - x)[1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMITFSI)],xLiTFSI type, where BMI+ is the 1-butyl-3-methylimidazolium cation and TFSI- the bis(trifluoromethanesulfonyl)imide anion, are analyzed for a lithium bis(trifluoromethane sulfone)imide (LiTFSI) mole fraction x = 0.23 and PMMA contents from 0 to 50 wt%. The lithium is found to have an average coordination of about three CO groups and less than one TFSI- anion. It plays the role of a cross-linker between the ester groups of PMMA and the nonvolatile ionic liquid. Addition of PMMA to the (1 - x)(BMITFSI),xLiTFSI ionic liquid lowers the conductivity but might improve the lithium transference number by transforming the [Li(TFSI)2]- anionic clusters present in the pure ionic liquid into a mixed coordination by ester groups and TFSI- anions.< Réduire
Mots clés en anglais
Ionic liquid
Poly(methyl methacrylate) 1-butyl-3-methylimidazolium
Bis(trifluoromethanesulfonyl)imide
Raman spectroscopy
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