Measurement of transference numbers for lithium ion electrolytes via four different methods, a comparative study

被引：411

作者：

Zugmann, S. ^{[1
]}

Fleischmann, M. ^{[2
]}

Amereller, M. ^{[1
]}

Gschwind, R. M. ^{[2
]}

Wiemhoefer, H. D. ^{[3
]}

Gores, H. J. ^{[1
]}

机构：

[1] Univ Regensburg, Inst Phys & Theoret Chem, D-93040 Regensburg, Germany

[2] Univ Regensburg, Inst Organ Chem, D-93040 Regensburg, Germany

[3] Univ Munster, Inst Inorgan & Analyt Chem, D-48149 Munster, Germany

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 11期

关键词：

Lithium transference number; Potentiostatic polarization; Galvanostatic polarization; Electromotive force; Nuclear magnetic resonance spectroscopy; NUCLEAR-MAGNETIC-RESONANCE; TRANSPORT-PROPERTIES; POLYMER ELECTROLYTES; PROPYLENE CARBONATE; SELF-DIFFUSION; RESTRICTED DIFFUSION; SODIUM-CHLORIDE; CONDUCTIVITY; ANION; SOLVATION;

D O I：

10.1016/j.electacta.2011.02.025

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report here on comparative measurements of cationic transference numbers of some lithium battery related electrolytes including lithium tetrafluoroborate in propylene carbonate, lithium hexafluorophosphate in blends of ethylene carbonate/diethyl carbonate and ethylene carbonate/propylene carbonate/dimethyl carbonate, as well as lithium difluoromono (oxalate) borate in an ethylene carbonate/diethyl carbonate blend via four different methods. Whereas three electrochemical methods yield transference numbers decreasing with concentration in accordance with electrostatic theories, valid for low to intermediate concentrations of the electrolyte, nuclear magnetic resonance spectroscopy measurements show increasing transference numbers with increasing concentration. The discrepancy is attributed to effects of ion-ion and ion-solvent interaction. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：3926 / 3933

页数：8

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