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Configurational entropy effect for conductivities of solid polymer electrolytes

✍ Scribed by Jung Yong Kim; Young Chan Bae

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 154 KB
Volume: 73
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19990906)73:10<1891::aid-app8>3.0.co;2-m

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✦ Synopsis

Poly(itaconic acid) esters with oligo(ethylene oxide) side chains can form amorphous solid solutions with LiClO 4 and NaClO 4 . Many research groups have examined AC ionic conductivities of these polymer/salt mixtures as a function of side-chain length and salt concentration. We propose a model to interpret these experimental data based on a configurational entropy consisting of three kinds of entropy such as a mixing of polymer and salt ions, a disorientation of polymers, and a drop of chain flexibility (or increase of T g ) with salt concentrations. Quantitative description according to the proposed model is presented.

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