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Physical properties of high Li-ion content N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide based ionic liquid electrolytes

journal contribution
posted on 01.01.2015, 00:00 authored by Martin Yoon, A S Best, Maria ForsythMaria Forsyth, D R MacFarlane, Patrick HowlettPatrick Howlett
Electrolytes based on bis(fluorosulfonyl)imide (FSI) with a range of LiFSI salt concentrations were characterized using physical property measurements, as well as NMR, FT-IR and Raman spectroscopy. Different from the behavior at lower concentrations, the FSI electrolyte containing 1 : 1 salt to IL mole ratio showed less deviation from the KCl line in the Walden plot, suggesting greater ionic dissociation. Diffusion measurements show higher mobility of lithium ions compared to the other ions, which suggests that the partial conductivity of Li(+) is higher at this higher composition. Changes in the FT-IR and Raman peaks indicate that the cis-FSI conformation is preferred with increasing Li salt concentration.

History

Journal

Physical chemistry chemical physics

Volume

17

Issue

6

Pagination

4656 - 4663

Publisher

Royal Society of Chemistry

Location

Cambridge, Eng.

ISSN

1463-9084

eISSN

1463-9084

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Royal Society of Chemistry