Issue 45, 2014

Mixtures of protic ionic liquids and propylene carbonate as advanced electrolytes for lithium-ion batteries

Abstract

In this study we investigated the chemical–physical properties of mixtures containing the protic ionic liquid (PIL) N-butyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (PYRH4TFSI), propylene carbonate (PC) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in view of their use as electrolytes for lithium-ion batteries (LIBs). We showed that these electrolytic solutions might display conductivity and viscosity comparable to those of conventional electrolytes. Depending on the amount of PIL present inside the mixtures, such mixtures might also display the ability to suppress the anodic dissolution of Al. Furthermore, we showed that the coordination of lithium ions by TFSI in PIL–PC mixtures appears to be different than the one observed for mixtures of PC and aprotic ionic liquids (AILs). When used in combination with a battery electrode, e.g. lithium iron phosphate (LFP), these mixtures allow the achievement of high performance also at a very high C-rate.

Graphical abstract: Mixtures of protic ionic liquids and propylene carbonate as advanced electrolytes for lithium-ion batteries

Article information

Article type
Paper
Submitted
26 Aug 2014
Accepted
30 Sep 2014
First published
06 Oct 2014
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2014,16, 25014-25023

Mixtures of protic ionic liquids and propylene carbonate as advanced electrolytes for lithium-ion batteries

T. Vogl, S. Menne and A. Balducci, Phys. Chem. Chem. Phys., 2014, 16, 25014 DOI: 10.1039/C4CP03830D

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