Laser Raman and ac impedance spectroscopic studies of PVA: NH4NO3 polymer electrolyte

M. Hema, S. Selvasekarapandian, G. Hirankumar, A. Sakunthala, D. Arunkumar, H. Nithya

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Ion conducting polymer electrolyte PVA:NH4NO3 has been prepared by solution casting technique and characterized using XRD, Raman and ac impedance spectroscopic analyses. The amorphous nature of the polymer films has been confirmed by XRD and Raman spectroscopy. An insight into the deconvoluted Raman peaks of υ1 vibration of NO3- anion for the polymer electrolyte reveals the dominancy of ion aggregates at higher NH4NO3 concentration. From the ac impedance studies, the highest ion conductivity at 303 K has been found to be 7.5 × 10-3 S cm-1 for 80PVA:20NH4NO3. The conductivity of the polymer electrolytes has been found to depend on the degree of dissociation of the salt in the host polymer matrix. The combination of the above-mentioned analyses has proven worth while and in fact necessary in order to achieve better understanding of these complex systems.

Original languageEnglish
Pages (from-to)474-478
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume75
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1
Externally publishedYes

Keywords

  • Polymers
  • Raman spectroscopy
  • Transport properties
  • X-ray diffraction

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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