Effects of potassium iodide (KI) on crystallinity, thermal stability, and electrical properties of polymer blend electrolytes (PVC/PEO:KI)

Effects of potassium iodide (KI) on crystallinity, thermal stability, and electrical properties... Potassium ion conducting solid polymer blend electrolytes based on PVC/PEO:KI of various compositions were prepared by solution-casting technique. The structural changes along with K+ ion–polymer blend electrolyte interactions and the thermal stability of the samples were studied by X-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, and thermo-gravimetric analysis. Electrical properties were measured as a function of composition and temperature using complex impedance spectroscopy. The electrical conductivity exhibited Arrhenius type of behavior, with the activation energy decreasing with increasing KI concentration. The conductivity of the polymer blend (PVC/PEO) sample was obtained at ambient temperature (303K) as 3.09×10−6Scm−1, and for the PVC/PEO:KI (42.5:42.5:15) electrolyte as 3.66×10−4Scm−1, the conductivities were greatly enhanced at 363K to 8.23×10−4 and 1.30×10−2Scm−1, respectively. The ionic transference number of the PVC/PEO:KI (42.5:42.5:15) electrolyte was determined to be 0.98. The increase in amorphous phase and free K+ ion concentration was responsible for the conductivity improvement in the electrolyte system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Effects of potassium iodide (KI) on crystallinity, thermal stability, and electrical properties of polymer blend electrolytes (PVC/PEO:KI)

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2015.07.002
Publisher site
See Article on Publisher Site

Abstract

Potassium ion conducting solid polymer blend electrolytes based on PVC/PEO:KI of various compositions were prepared by solution-casting technique. The structural changes along with K+ ion–polymer blend electrolyte interactions and the thermal stability of the samples were studied by X-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, and thermo-gravimetric analysis. Electrical properties were measured as a function of composition and temperature using complex impedance spectroscopy. The electrical conductivity exhibited Arrhenius type of behavior, with the activation energy decreasing with increasing KI concentration. The conductivity of the polymer blend (PVC/PEO) sample was obtained at ambient temperature (303K) as 3.09×10−6Scm−1, and for the PVC/PEO:KI (42.5:42.5:15) electrolyte as 3.66×10−4Scm−1, the conductivities were greatly enhanced at 363K to 8.23×10−4 and 1.30×10−2Scm−1, respectively. The ionic transference number of the PVC/PEO:KI (42.5:42.5:15) electrolyte was determined to be 0.98. The increase in amorphous phase and free K+ ion concentration was responsible for the conductivity improvement in the electrolyte system.

Journal

Solid State IonicsElsevier

Published: Oct 1, 2015

References

  • Langmuir
    Norde, W.; Gage, D.
  • Eur. Polym. J.
    Marco, C.; Gómez, M.A.; Fatou, J.G.; Etxeberria, A.; Elorza, M.M.; Iruin, J.J.
  • Polym. Test.
    Ravi, M.; Kiran Kumar, K.; Madhu Mohan, V.; Narasimha Rao, V.V.R.
  • Solid State Ionics
    Vondrák, J.; Reiter, J.; Velicka, J.; Sedlaříkova, M.
  • J. Power Sources
    Sagane, F.; Abe, T.; Iriyama, Y.; Ogumi, Z.
  • J. Power Sources
    Jaipal Reddy, M.; Chu, Peter.P.; Siva Kumar, J.; Subba Rao, U.V.
  • Solid State Ionics
    Stephan, A.M.; Yuria Saito, N.; Muniyandi, N.G.; Renganathan, S.; Kalyanasundaram, R.; Nimma, Elizabeth

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