Lithium ion transport and solvation in N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide-propylene carbonate mixtures

Kühnel R-S, Balducci A

Research article (journal)

Abstract

Ionic liquid-solvent mixtures are electrolytes for electrochemical energy storage devices that can combine low flammability with high conductivity. Here, we report about (lithium) transport properties of and Li+ solvation in N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR 14TFSI)-propylene carbonate mixtures containing LiTFSI. Transport properties are investigated by viscosity, conductivity, and diffusion measurements. Interestingly, Li+ ion diffusion is enhanced the most upon PC addition to PYR14TFSI-LiTFSI. Raman measurements show a decreasing contribution of TFSI- to the coordination of Li + upon PC addition to the electrolyte while the total degree of ion dissociation goes through a minimum. © 2014 American Chemical Society.

Details zur Publikation

Pages: 7
Release year: 2014
Language in which the publication is written: English
Link to the full text: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84897880676