The beneficial effect of protic ionic liquids on the lithium environment in electrolytes for battery applications

被引：90

作者：

Vogl, Thomas ^{[1
]}

Menne, Sebastian ^{[1
]}

Kuehnel, Ruben-Simon ^{[1
]}

Balducci, Andrea ^{[1
]}

机构：

[1] Univ Munster, Inst Phys Chem MEET, D-48149 Munster, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 22期

关键词：

DOUBLE-LAYER CAPACITORS; BIS(TRIFLUOROMETHANESULFONYL)IMIDE; SUPERCAPACITORS; PERFORMANCE; DIFFUSION; SOLVATION; PHOSPHATE; TFSI; CELL;

D O I：

10.1039/c3ta15224c

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：

This work reports the improved rate performance of ionic-liquid based lithium-ion batteries by replacement of the conventional aprotic ionic liquid (AIL) N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide (PYR14TFSI) by protic ionic liquids (PILs). Two model pyrrolidinium-TFSI PILs are synthesized and their mixtures with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) are characterized in terms of conductivity, viscosity and self-diffusion coefficients. Raman measurements show pronounced differences in terms of TFSI- coordination to Li+ between the AIL and the PILs. Li+ is coordinated by significantly fewer TFSI- anions in the investigated PILs, which is discussed as the likely cause for the much improved rate performance of lithium vanadium phosphate-based electrodes in these electrolytes.

引用

页码：8258 / 8265

页数：8

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