Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content

Girard, G.M.A., Hilder, M., Zhu, H., Nucciarone, D., Whitbread, K., Zavorine, S., Moser, M., Forsyth, M., MacFarlane, D.R. and Howlett, P.C. 2015, Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content, Physical chemistry chemical physics, vol. 17, no. 14, pp. 8706-8713, doi: 10.1039/C5CP00205B.

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Title Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content
Author(s) Girard, G.M.A.
Hilder, M.
Zhu, H.ORCID iD for Zhu, H. orcid.org/0000-0001-6352-7633
Nucciarone, D.
Whitbread, K.
Zavorine, S.
Moser, M.
Forsyth, M.ORCID iD for Forsyth, M. orcid.org/0000-0002-4273-8105
MacFarlane, D.R.
Howlett, P.C.ORCID iD for Howlett, P.C. orcid.org/0000-0002-2151-2932
Journal name Physical chemistry chemical physics
Volume number 17
Issue number 14
Start page 8706
End page 8713
Total pages 8
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2015
ISSN 1463-9076
1463-9084
Summary Electrolytes of a room temperature ionic liquid (RTIL), trimethyl(isobutyl)phosphonium (P111i4) bis(fluorosulfonyl)imide (FSI) with a wide range of lithium bis(fluorosulfonyl)imide (LiFSI) salt concentrations (up to 3.8 mol kg−1 of salt in the RTIL) were characterised using a combination of techniques including viscosity, conductivity, differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), nuclear magnetic resonance (NMR) and cyclic voltammetry (CV). We show that the FSI-based electrolyte containing a high salt concentration (e.g. 1:1 salt to IL molar ratio, equivalent to 3.2 mol kg−1 of LiFSI) displays unusual transport behavior with respect to lithium ion mobility and promising electrochemical behavior, despite an increase in viscosity. These electrolytes could compete with the more traditionally studied nitrogen-based ionic liquids (ILs) in lithium battery applications.
Language eng
DOI 10.1039/C5CP00205B
Field of Research 091205 Functional Materials
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID LP120200181
Copyright notice ©2015, the Owner Societies
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071934

Document type: Journal Article
Collection: Institute for Frontier Materials
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