Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s

Emmanuel U. Mapesa, Mingtao Chen, Maximilian F. Heres, Matthew A. Harris, Thomas Kinsey, Yangyang Wang, Timothy Edward Long, Bradley S. Lokitz, Joshua R. Sangoro

Research output: Contribution to journalArticle

Abstract

Ion dynamics in a series of imidazolium-based triblock copolymers (triblock co-PILs) are investigated using broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) and compared to their homopolymer counterparts (homo-PILs). Two calorimetric glass transition temperatures (Tg) are observed corresponding to the charged poly(ionic liquid) (PIL) blocks and noncharged polystyrene (PS) blocks. Varying the counterion from Br- to NTf2 decreases the Tg of the charged block by over 50 °C, thereby increasing the room-temperature ionic dc conductivity by over 6 orders of magnitude. Interestingly, for a given anion, varying the volume fraction of the charged block, from ∼0.5 to ∼0.8, has very minimal effect on the dc ionic conductivity, indicating that the choice of counterion is the key factor influencing charge transport in these systems.

Original languageEnglish
Pages (from-to)620-628
Number of pages9
JournalMacromolecules
Volume52
Issue number2
DOIs
Publication statusPublished - 2019 Jan 22
Externally publishedYes

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Ionic Liquids
Ionic conductivity
Ionic liquids
Charge transfer
Dielectric spectroscopy
Polystyrenes
Homopolymerization
Block copolymers
Anions
Differential scanning calorimetry
Volume fraction
Negative ions
Ions
Temperature
Glass transition temperature

ASJC Scopus subject areas

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

Cite this

Mapesa, E. U., Chen, M., Heres, M. F., Harris, M. A., Kinsey, T., Wang, Y., ... Sangoro, J. R. (2019). Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s. Macromolecules, 52(2), 620-628. https://doi.org/10.1021/acs.macromol.8b02143

Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s. / Mapesa, Emmanuel U.; Chen, Mingtao; Heres, Maximilian F.; Harris, Matthew A.; Kinsey, Thomas; Wang, Yangyang; Long, Timothy Edward; Lokitz, Bradley S.; Sangoro, Joshua R.

In: Macromolecules, Vol. 52, No. 2, 22.01.2019, p. 620-628.

Research output: Contribution to journalArticle

Mapesa, EU, Chen, M, Heres, MF, Harris, MA, Kinsey, T, Wang, Y, Long, TE, Lokitz, BS & Sangoro, JR 2019, 'Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s' Macromolecules, vol. 52, no. 2, pp. 620-628. https://doi.org/10.1021/acs.macromol.8b02143
Mapesa EU, Chen M, Heres MF, Harris MA, Kinsey T, Wang Y et al. Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s. Macromolecules. 2019 Jan 22;52(2):620-628. https://doi.org/10.1021/acs.macromol.8b02143
Mapesa, Emmanuel U. ; Chen, Mingtao ; Heres, Maximilian F. ; Harris, Matthew A. ; Kinsey, Thomas ; Wang, Yangyang ; Long, Timothy Edward ; Lokitz, Bradley S. ; Sangoro, Joshua R. / Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s. In: Macromolecules. 2019 ; Vol. 52, No. 2. pp. 620-628.
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