Influence of temperature on the impedance of ionic polymer metal composites

Youngsu Cha, Hubert Kim, Maurizio Porfiri

Research output: Contribution to journalArticlepeer-review

Abstract

In this letter, we study the effect of temperature on the electric impedance of ionic polymer metal composites (IPMCs). Experiments are performed on in-house fabricated Nafion-based samples for temperatures varying from 25 to 40 °C. By using a recently proposed physics-based circuit model, we identify the equivalent resistance, capacitance and Warburg impedance of each sample, and characterize their dependence on temperature. We find that the resistance and the capacitance decrease as the temperature increases, while the Warburg impedance increases. Such variations are ultimately associated with the effect of temperature on the dielectric constant and the diffusivity of the IPMC.

Original languageEnglish (US)
Pages (from-to)179-182
Number of pages4
JournalMaterials Letters
Volume133
DOIs
StatePublished - Oct 15 2014

Keywords

  • Diffusion
  • Ionic polymer metal composites (IPMCs)
  • Thermal analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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