Lithium Ion Transport and Solvation in N-Butyl-N-methylpyrrolidinium Bis(trifluoromethanesulfonyl)imide-Propylene Carbonate Mixtures

被引：67

作者：

Kuehnel, Ruben-Simon

Balducci, Andrea ^{[1
]}

机构：

[1] Univ Munster, MEET Battery Res Ctr, D-48149 Munster, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 11期

关键词：

GRADIENT SPIN-ECHO; ELECTROCHEMICAL PROPERTIES; LIQUID ELECTROLYTES; RAMAN-SPECTROSCOPY; BATTERIES; DIFFUSION; SOLVENT; TFSI; LIN(SO2CF3)(2); CONDUCTIVITY;

D O I：

10.1021/jp5005264

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：

Ionic liquid-solvent mixtures are electrolytes for electro-chemical energy storage devices that can combine low flammability with high conductivity. Here, we report about (lithium) transport properties of and Li+ solvation in N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI)-propylene carbonate mixtures containing LiTFSI. Transport properties are investigated by viscosity, conductivity, and diffusion measurements. Interestingly, Li+ ion diffusion is enhanced the most upon PC addition to PYR14TFSI-LiTFSI. Raman measurements show a decreasing contribution of TFSI- to the coordination of Li+ upon PC addition to the electrolyte while the total degree of ion dissociation goes through a minimum.

引用

收藏

页码：5742 / 5748

页数：7

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