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Lithium ion conduction in extreme polymer in salt regime

Mishra, Rachna and Baskaran, N and Ramakrishnan, PA and Rao, KJ (1998) Lithium ion conduction in extreme polymer in salt regime. In: Solid State Ionics, 112 (3-4). pp. 261-273.

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Abstract

Thin films of lithium salt containing polymer composites were prepared from LiI, Li2SO4 and Li3PO4 with PEO, PVA and PEO-PVA (50:50) blends by solution casting method, for various salt concentration (10, 15, 20 mole %). The conductivity and dielectric measurements were carried out on these films as a function of frequency at various temperatures. The highest conductivity was observed in LiI-polymer composites. The variation of conductivity with salt concentration has been explained on the basis of percolation path. In the case of Li2SO4 and Li3PO4 composites, the variation of conductivity with salt composition is found to depend more on the nature of coordination of Lit ions in the composites rather than the mole % of salt itself. AC conductivity and dielectric relaxation behavior of these composites were also studied and the results are discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Polymer composite;Polymer blends;AC conductivity;Dielectric relaxation;Li ion conduction;Percolation.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 04 Sep 2009 04:01
Last Modified: 19 Sep 2010 05:25
URI: http://eprints.iisc.ernet.in/id/eprint/18864

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