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

In this study we investigated the chemical-physical properties of mixtures containing the protic ionic liquid (PIL) N -butyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR H4 TFSI), propylene carbonate (PC) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in view of their use as electr...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2014-01, Vol.16 (45), p.2514-2523
Main Authors: Vogl, T, Menne, S, Balducci, A
Format: Article
Language:English
Subjects:
Carbonates
Electrodes
Electrolytes
Ionic liquids
Lithium ions
Lithium-ion batteries
Polycarbonates
Propylene
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Summary:In this study we investigated the chemical-physical properties of mixtures containing the protic ionic liquid (PIL) N -butyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR H4 TFSI), 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. In this study we investigated the chemical-physical properties of mixtures containing the protic ionic liquid (PIL) N -butyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR H4 TFSI), propylene carbonate (PC) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in view of their use as electrolytes for lithium-ion batteries (LIBs).
ISSN:1463-9076
1463-9084
DOI:10.1039/c4cp03830d