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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(03) [March 2011] >
| Title: | Dielectric relaxation spectroscopy and ion conduction in poly(ethylene oxide)-blend salts-montmorillonite nanocomposite electrolytes |
| Authors: | Choudhary, Shobhna
Sengwa, R J |
| Keywords: | Polymer nanocomposite electrolytes
Dielectric relaxation
Ionic conductivity |
| Issue Date: | Mar-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Poly(ethylene oxide)
(PEO) and blend alkaline metal salts (equal number of cations of lithium
perchlorate trihydrate and sodium perchlorate monohydrate) complexations with
montmorillonite (MMT) nanoclay filler up to 20 wt% concentration were
synthesized by direct melt compounded hot-press technique at temperature 104°C under 3 tons pressure. The spectra of
complex dielectric function, electric modulus, and alternating current (ac) electrical conductivity and complex
impedance plane plots of these polymer nanocomposite electrolytes were
investigated in the frequency range 20 Hz - 1 MHz at ambient temperature.
Relaxation times corresponding to electrode polarization and ionic conduction
relaxation processes, and their correlation with dc ionic conductivity were explored. It has been recognized that
the increase of MMT concentration results in stiffening of the PEO–MMT
transient cross-linked structures, which decreases the PEO chain segmental
dynamics and the cations translational motion. |
| Page(s): | 204-213 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(03) [March 2011]
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