Large Enhancement of the Ionic Conductivity in an Electron-Beam-Irradiated $[Poly(ethylene glycol)]_xLiClO_4$ Solid Polymer Electrolyte

Singh, Joykumar and Ganeshsanjeev, * and Siddappa, K and Bhat, SV (2004) Large Enhancement of the Ionic Conductivity in an Electron-Beam-Irradiated $[Poly(ethylene glycol)]_xLiClO_4$ Solid Polymer Electrolyte. In: Journal of Polymer Science Part B: Polymer Physics, 42 (7). pp. 1299-1311.

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Abstract

The effect of electron-beam (4-8 MeV) irradiation on the ionic conductivity of a solid polymer electrolyte, poly(ethylene glycol) complexed with $LiClO_4$ , was studied. A large enhancement of the conductivity of nearly two orders of magnitude was observed for the highest dose of irradiation (15 kGy) used. The samples were characterized with differential scanning calorimetry, matrix-assisted laser desorption/ionization, and electron spin resonance spectroscopy. Although no free radicals were present in the irradiated samples, a decrease in the glass-transition temperature and an increase in the amorphous fraction were observed. Even though pure poly(ethylene glycol) underwent considerable fragmentation, unexpectedly, no significant fragmentation was observed in the polymer-salt complexes. The enhancement of the conductivity was attributed to an increase in the amorphous fraction of the systems and also to an increase in the flexibility of the polymer chains due to the irradiation.

Item Type:	Journal Article
Publication:	Journal of Polymer Science Part B: Polymer Physics
Publisher:	Wiley Periodicals, Inc.
Additional Information:	The copyright belongs to Wiley Periodicals, Inc.
Keywords:	solid polymer electrolyte;electron beam irradiation;maldi;glass transition;ionic conductivity
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	10 Jan 2007
Last Modified:	19 Sep 2010 04:21
URI:	http://eprints.iisc.ac.in/id/eprint/4062

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