Polymerized Ionic Liquids: Correlation of Ionic Conductivity with Nanoscale Morphology and Counterion Volume

Ciprian Iacob, Atsushi Matsumoto, Marissa Brennan, Hongjun Liu, Stephen J. Paddison, Osamu Urakawa, Tadashi Inoue, Joshua Sangoro, James Patrick Runt

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

The impact of the chemical structure on ion transport, nanoscale morphology, and dynamics in polymerized imidazolium-based ionic liquids is investigated by broadband dielectric spectroscopy and X-ray scattering, complemented with atomistic molecular dynamics simulations. Anion volume is found to correlate strongly with Tg-independent ionic conductivities spanning more than 3 orders of magnitude. In addition, a systematic increase in alkyl side chain length results in about one decade decrease in Tg-independent ionic conductivity correlating with an increase in the characteristic backbone-to-backbone distances found from scattering and simulations. The quantitative comparison between ion sizes, morphology, and ionic conductivity underscores the need for polymerized ionic liquids with small counterions and short alkyl side chain length in order to obtain polymer electrolytes with higher ionic conductivity.

Original languageEnglish (US)
Pages (from-to)941-946
Number of pages6
JournalACS Macro Letters
Volume6
Issue number9
DOIs
StatePublished - Sep 19 2017

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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    Iacob, C., Matsumoto, A., Brennan, M., Liu, H., Paddison, S. J., Urakawa, O., Inoue, T., Sangoro, J., & Runt, J. P. (2017). Polymerized Ionic Liquids: Correlation of Ionic Conductivity with Nanoscale Morphology and Counterion Volume. ACS Macro Letters, 6(9), 941-946. https://doi.org/10.1021/acsmacrolett.7b00335