Pressure-Temperature Phase Diagram of Ionic Liquid Dielectric DEME-TFSI

Duncan M. McCann, Martin Misek, Konstantin V. Kamenev, Andrew D. Huxley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ionic liquids have proven highly effective as dielectrics in Electric Double Layer (EDL) devices for electrostatic doping in a range of materials. DEME-TFSI in particular is a commonly used dielectric due to its high ionic conductivity and low glass transition temperature of 182 K. Application of pressure provides a dual tuning parameter in tandem with the electric field yet progress is hampered by the lack of an accurate pressure-temperature phase diagram for DEME- TFSI. We present results on expansivity and leakage current measurements of the ionic liquid dielectric DEME-TFSI to provide a phase diagram mapping the glass transition temperature up to 0.6 GPa. This should allow the effective operation of EDL devices using DEME-TFSI under pressure.

Original languageEnglish
Title of host publicationPhysics Procedia
PublisherElsevier
Pages252-258
Number of pages7
Volume75
DOIs
Publication statusPublished - 29 Dec 2015
Event20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain
Duration: 5 Jul 201510 Jul 2015

Conference

Conference20th International Conference on Magnetism, ICM 2015
CountrySpain
CityBarcelona
Period5/07/1510/07/15

Keywords

  • DEME-TFSI
  • glass transition
  • ionic liquid
  • phase
  • pressure

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