Ionic liquids and organic ionic plastic crystals utilizing small phosphonium cations | Zendy

Vanessa Armel | Zendy; D. Velayutham | Zendy; Jiazeng Sun | Zendy; Patrick C. Howlett | Zendy; Maria Forsyth | Zendy; Douglas R. MacFarlane | Zendy; Jennifer M. Pringle | Zendy

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Ionic liquids and organic ionic plastic crystals utilizing small phosphonium cations

Author(s) -

Vanessa Armel,

D. Velayutham,

Jiazeng Sun,

Patrick C. Howlett,

Maria Forsyth,

Douglas R. MacFarlane,

Jennifer M. Pringle

Publication year - 2011

Publication title -

journal of materials chemistry

Language(s) - English

Resource type - Journals

eISSN - 1364-5501

pISSN - 0959-9428

DOI - 10.1039/c1jm10417a

Subject(s) - phosphonium , ionic liquid , plastic crystal , ionic conductivity , electrolyte , lithium (medication) , chemistry , ionic bonding , alkyl , inorganic chemistry , electrochemistry , halide , materials science , chemical engineering , ion , organic chemistry , electrode , phase (matter) , engineering , catalysis , medicine , endocrinology

The development of new liquid and solid state electrolytes is paramount for the advancement of electrochemical devices such as lithium batteries and solar cells. Ionic liquids have shown great promise in both these applications. Here we demonstrate the use of phosphonium cations with small alkyl chain substituents, in combination with a range of different anions, to produce a variety of new halide free ionic liquids that are fluid, conductive and with sufficient thermal stability for a range of electrochemical applications. Walden plot analysis of the new phosphonium ionic liquids shows that these can be classed as "good" ionic liquids, with low degrees of ion pairing and/or aggregation, and the lithium deposition and stripping from one of these ionic liquids has been demonstrated. Furthermore, for the first time phosphonium cations have been used to form a range of organic ionic plastic crystals. These materials can show significant ionic conductivity in the solid state and thus are of great interest as potential solid-state electrolyte materials.

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