Thermal, vibrational and Ac impedance studies on proton conducting polymer electrolytes based on poly(vinyl acetate)

D. Arun Kumar, S. Selvasekarapandian, R. Baskaran, T. Savitha, H. Nithya

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Proton conducting polymer electrolytes based on poly(vinyl acetate) (PVAc) and perchloric acid (HClO 4) have been prepared by solution casting technique with various compositions. The X-ray diffraction analysis confirms the polymer-HClO 4 complex formation. FTIR spectra analysis reveals the interaction between proton and ester oxygen of poly(vinyl acetate) (PVAc). The shift in T g towards the lower temperature indicates that the polymer salt interaction takes places in the amorphous phase of the polymer matrix. Ac impedance spectroscopy reveals that 75 mol% PVAc:25 mol% HClO 4 exhibits maximum conductivity, 3.75 × 10 - 3 S cm - 1 at room temperature (303 K). The increase in conductivity with increase in dopant concentration and temperature may be attributed to the enhanced mobility of the polymer chains, number of charge carriers and rotations of side chains. The temperature dependence of conductivity shows non-Arrhenius behavior at higher temperatures.

Original languageEnglish
Pages (from-to)531-536
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume358
Issue number3
DOIs
Publication statusPublished - 2012 Feb 1
Externally publishedYes

Keywords

  • DSC
  • FTIR
  • Impedance analysis
  • PVAc
  • Proton conductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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