Charge Transport and Electrode Polarization in Phosphonium Ionic Liquids Bearing Sulfonate and Carboxylate Anions

POSTER

Abstract

The impact of chemical structure on mesoscale organization and dynamics in a series of ionic liquids based on the tetradecyltrihexylphosphonium cation with various sulfonate and carboxylate anions has been studied using broadband dielectric spectroscopy and wide-angle X-ray scattering. The effects of anion structure on the mesoscale organization in the liquid and ion transport properties were interpreted based on current theoretical understanding. In addition, the phenomena of electrode polarization arising due to accumulation of ions at the electrode surface was analyzed with regard to mesoscale organization and bulk transport properties. Evidence of slow dynamics at the electrode/ionic liquid interface is observed and attributed to electrosorption.

*The authors acknowledge financial support through the National Science Foundation, Division of Chemistry through grant CHE-1753282.

Presenters

  • Matthew Harris

    • Chemical and Biomolecular Engineering, University of Tennessee, Knoxville
    • University of Tennessee

Authors

  • Matthew Harris

    • Chemical and Biomolecular Engineering, University of Tennessee, Knoxville
    • University of Tennessee

  • James T Cosby

    • Chemical and Biomolecular Engineering, University of Tennessee, Knoxville
    • University of Tennessee

  • Durgesh Wagle

    • University of Missouri

  • Gary Baker

    • University of Missouri

  • Joshua Sangoro

    • Chemical and Biomolecular Engineering, University of Tennessee
    • University of Tennessee
    • Chemical and Biomolecular Engineering, University of Tennessee, Knoxville
    • Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville