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The effect of coordinating and non-coordinating additives on the transport properties in ionic liquid electrolytes for lithium batteries
journal contribution
posted on 2011-01-01, 00:00 authored by Paul Bayley, A Best, D MacFarlane, Maria ForsythMaria ForsythIn the present study we expand our analysis of using two contrasting organic solvent additives (toluene and THF) in an ionic liquid (IL)/Li NTf 2 electrolyte. Multinuclear Pulsed-Field Gradient (PFG) NMR, spin-lattice (T1) relaxation times and conductivity measurements over a wide temperature range are discussed in terms of transport properties and structuring of the liquid. The conductivity of both additive samples is enhanced the most at low temperatures, with THF slightly more effective than toluene. Both the anion and lithium self-diffusivity are enhanced in the same order by the additives (THF > toluene) while that of the pyrrolidinium cation is marginally enhanced. 1H spin-lattice relaxation times indicate a reasonable degree of structuring and anisotropic motion within all of the samples and both 19F and 7Li highlight the effectiveness of THF at influencing the lithium coordination within these systems.
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Journal
Physical chemistry chemical physicsVolume
13Issue
10Pagination
4632 - 4640Publisher
Royal Society of ChemistryLocation
London, EnglandISSN
1463-9076eISSN
1463-9084Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2011, Owner SocietiesUsage metrics
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