The effect of coordinating and non-coordinating additives on the transport properties in ionic liquid electrolytes for lithium batteries

被引：44

作者：

Bayley, Paul M. ^{[1
]}

Best, A. S. ^{[2
]}

MacFarlane, D. R. ^{[3
]}

Forsyth, M. ^{[1
]}

机构：

[1] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

[2] CSIRO, Div Energy Technol, Clayton, Vic 3168, Australia

[3] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

NMR RELAXATION; F-19; NMR; DYNAMICS; CHALLENGES; MOTIONS; C-13; H-1;

D O I：

10.1039/c0cp02084b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present study we expand our analysis of using two contrasting organic solvent additives (toluene and THF) in an ionic liquid (IL)/Li NTf2 electrolyte. Multinuclear Pulsed-Field Gradient (PFG) NMR, spin-lattice (T-1) 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. H-1 spin-lattice relaxation times indicate a reasonable degree of structuring and anisotropic motion within all of the samples and both F-19 and Li-7 highlight the effectiveness of THF at influencing the lithium coordination within these systems.

引用

页码：4632 / 4640

页数：9

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