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Title: Dielectric properties and structural conformation of melt compounded PEO-LiCF<sub>3</sub>SO<sub>3</sub>-MMT nanocomposite electrolytes
Authors: Choudhary, Shobhna
Sengwa, R J
Keywords: Nanocomposite electrolytes
Conductivity relaxation
Ionic conductivity
Poly(ethylene oxide)
MMT clay
Lithium triflate
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: Polymer nanocomposite electrolytes comprising poly(ethylene oxide) (PEO) and lithium triflate (LiCF<sub>3</sub>SO<sub>3</sub>) with varying concentration of montmorillonite (MMT) nano-platelets as filler were synthesized by direct melt compounded hot-press technique at PEO melting temperature. The complex dielectric function, electric modulus, alternating current electrical conductivity and complex impedance spectra in the frequency range 20 Hz-1 MHz at ambient temperature have been investigated. The <i>dc</i> conductivity shows an increase of about one order magnitude with optimum value at 2 wt% MMT. The correlation of conductivity relaxation time and the predominance of MMT intercalated structures with <i>dc</i> ionic conductivity in these solid electrolytes have been recognized, which confirm the potential use of dielectric relaxation spectroscopy for the online processing of melt compounded PNCEs materials.
Description: 600-605
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(09) [September 2011]

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