Polymer electrolytes: The importance of ion-ion interactions in diffusion dominated behavior

Mark C. Lonergan*, Duward F. Shriver, Mark A. Ratner

*Corresponding author for this work

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Monte Carlo simulations combined with analytic results based on the dynamically disordered hopping model are used to show that even in the presence of ion-ion interactions, the conductivity of polymer electrolytes is diffusion dominated. Coulomb interactions between charge carriers do result in some collective correlations that affect the conductivity, as evidenced by deviations from the Nernst Einstein equation, but the action of these interactions on the diffusivity overshadows these effects. Furthermore, these results show that renewal limited behavior (the diffusion coefficient depends linearly on the host's renewal rate) can persist even in the presence of these interactions. These studies help resolve the role ion-ion interactions play in renewal dominated behavior.

Original languageEnglish (US)
Pages (from-to)2041-2048
Number of pages8
JournalElectrochimica Acta
Volume40
Issue number13-14
DOIs
StatePublished - Oct 1995

Keywords

  • Coulomb interactions
  • conductivity
  • diffusivity
  • dynamically disordered hopping
  • ion-ion interactions
  • polymer electrolytes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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