File(s) under permanent embargo
Physicochemical characterization of a new family of small alkyl phosphonium imide ionic liquids
journal contribution
posted on 2016-06-01, 00:00 authored by Matthias Hilder, Gaetan Girard, K Whitbread, S Zavorine, M Moser, D Nucciarone, Maria ForsythMaria Forsyth, D R MacFarlane, Patrick HowlettPatrick HowlettDespite their promising properties, phosphonium based ionic liquids have attracted little attention as compared to their nitrogen-based cation counterparts. This study focuses on the properties of a family of small phosphonium imide ionic liquids, as well as the effect of lithium salt addition to these. The 6 ionic liquids were either alkyl, cyclic or nitrile functionalised phoshonium cations with bis(trifluoromethanesulfonyl)imide, NTf2, or bis(fluorosulfonyl)imide (FSI) as anion. Amongst the properties investigated were ionic conductivity, viscosity, thermal behaviour, electrochemical stability and the reversibility of electrochemical lithium cycling. All ionic liquids showed very promising properties e.g. having low transition temperatures, high electrochemical stabilities, low viscosities and high conductivities. Particularly the trimethyl phosphonium ionic liquids showed some of the highest conductivities reported amongst phosphonium ionic liquids generally. The combination of electrochemical stability, high conductivity and reversible lithium cycling makes them promising systems for energy storage devices such as lithium batteries.
History
Journal
Electrochimica actaVolume
202Pagination
100 - 109Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0013-4686Language
engPublication classification
C1 Refereed article in a scholarly journal; C Journal articleCopyright notice
2016, ElsevierUsage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC