DULUARD, Sandrine; GRONDIN, Joseph; BRUNEEL, Jean-Luc; PIANET, Isabelle; GRÉLARD, Axelle; CAMPET, Guy; DELVILLE, Marie-Hélène; LASSÈGUES, Jean-Claude

doi:10.1002/jrs.1896

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DULUARD, Sandrine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GRONDIN, Joseph
Institut des Sciences Moléculaires [ISM]

BRUNEEL, Jean-Luc
Institut des Sciences Moléculaires [ISM]

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Journal of Raman Spectroscopy. 2008, vol. 39, n° 5, p. 627-632

Wiley

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The Raman spectra of (1 - x)(BMITFSI), xLiTFSI ionic liquids, where 1-butyl-3-methylimidazolium cation (BMI+) and bis(trifluoromethane-sulfonyl)imide anion (TFSI-) are analyzed for LiTFSI mole fractions x < 0.4. As expected from previous studies on similar TFSI-based systems, most lithium ions are shown to be coordinated within [Li(TFSI)2]- anionic clusters. The variation of the self-diffusion coefficients of the 1H, 19F, and 7Li nuclei, measured by pulsed-gradient spin-echo NMR (PGSE-NMR) as a function of x, can be rationalized in terms of the weighted contribution of BMI+ cations, TFSI- free anions, and [Li(TFSI)2]- anionic clusters. This implies a negative transference number for lithium.< Leer menos

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Diffusion coefficients

Lithium transference number

Ionic liquid

1-butyl-3-methylimidazolium

Bis(trifluoromethanesulfonyl)imide

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Lithium solvation and diffusion in the 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ionic liquid

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