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The effect of composition, electron irradiation and quenching on ionic conductivity in a new solid polymer electrolyte: (PEG) x NH4I

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Abstract

We have prepared, characterized and investigated a new PEG-2000 based solid polymer electrolyte (PEG) x NH4I. Ionic conductivity measurements have been made as a function of salt concentration as well as temperature in the range 265–330 K. Selected compositions of the electrolyte were exposed to a beam of 8 MeV electrons to an accumulated dose of 10 kGy to study the effect on ionic conductivity. The electrolyte samples were also quenched at liquid nitrogen temperature and conductivity measurements were made. The ionic conductivity at room temperature exhibits a characteristic double peak for the composition x = 20 and 70. Both electron beam irradiation and quenching at low temperature have resulted in an increase in conductivity by 1–2 orders of magnitude. The enhancement of conductivity upon irradiation and quenching is interpreted as due to an increase in amorphous region and decrease in crystallinity of the electrolyte. DSC and proton NMR measurements also support this conclusion.

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Authors and Affiliations

  1. Department of Physics, Bangalore University, Bangalore, 560 056, India

    R. Damle & P. N. Kulkarni

  2. Department of Physics, Indian Institute of Science, Bangalore, 560 012, India

    S. V. Bhat

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  1. R. Damle
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  2. P. N. Kulkarni
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  3. S. V. Bhat
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Correspondence to R. Damle.

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Damle, R., Kulkarni, P.N. & Bhat, S.V. The effect of composition, electron irradiation and quenching on ionic conductivity in a new solid polymer electrolyte: (PEG) x NH4I. Pramana - J Phys 72, 555–568 (2009). https://doi.org/10.1007/s12043-009-0049-0

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  • DOI: https://doi.org/10.1007/s12043-009-0049-0

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