Silyl and Silyl/Carbonate Blend Electrolytes for Lithium-Ion Battery Applications

被引：3

作者：

Lyons, L. J. ^{[1
]}

Pena-Hueso, A. ^{[2
]}

Johnson, T. ^{[2
]}

West, R. ^{[2
]}

机构：

[1] Grinnell Coll, Dept Chem, Grinnell, IA 50112 USA

[2] Silatronix Inc, 3587 Anderson St,Suite 108, Madison, WI 53704 USA

来源：

18TH INTERNATIONAL MEETING ON LITHIUM BATTERIES (IMLB 2016) | 2016年 / 73卷 / 01期

基金：

美国国家科学基金会;

关键词：

PROPYLENE CARBONATE; SELF-DIFFUSION; NMR; CONDUCTIVITY;

D O I：

10.1149/07301.0281ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Silyl glycol molecules and silyl nitrile molecules were used to prepare electrolytes with the salts LiPF6 and LiTFSI, Ionic conductivities of silyl electrolytes at 298 K range from 1.0 to 2.3 mScm(-1) for salt concentrations at 1 M. Ionic conductivities of the silyl solvent/carbonate blend electrolytes increase, achieving ionic conductivities at 298 K of 5-6 mScm(-1). From PFG-STE NMR experiments we find higher lithium transference numbers in silyl electrolytes than those in analogous cyclic carbonate electrolytes. The lithium transference numbers increase with increasing temperature for PF6- electrolytes while those based on TFSI- electrolytes decrease with increasing temperature. From both the ionic conductivity and NMR diffusion measurements, we have calculated the extent of ion dissociation in these electrolytes. Ion dissociation generally decreases with increasing temperature from 300-330 K.

引用

页码：281 / 288

页数：8

共 10 条

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