Rheological properties and impedance spectroscopy of PMMA-PVdF blend and PMMA gel polymer electrolytes for advanced lithium batteries |
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Authors: | I Nicotera L Coppola C Oliviero G A Ranieri |
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Institution: | (1) Department of Chemistry, University of Calabria, 87036-Arcavacata di Rende, Cosenza, Italy |
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Abstract: | In the present study, blend ionic conducting membranes formed by poly(methylmethacrylate (PMMA) / poly(vinilydenefluoride)
(PVDF) (blend ratio PMMA/PVdF=80/20), lithium perchlorate (LiClO4) as a salt and a mixture of ethylene carbonate (EC)-propylene carbonate (PC) as plasticizer are prepared and characterized
by impedance spectroscopy and dynamic rheological experiments. We compared the results obtained on the blends with those on
PMMA gel-based polymer electrolytes incorporating the same EC/PC mixture of plasticizer and the same quantities of salt. The
main focus of this study is to illustrate the rheological data of the gels and blends electrolytes to point up their mechanical
stability with the temperature in sight of the technological application.
The conductivity values are reported in the 20–100 °C temperature range for different lithium salt contents, while the rheological
behaviour has been recorded up to 140 °C.
Paper presented at the Patras Conference on Solid State Ionics — Transport Properties, Patras, Greece, Sept. 14 – 18, 2004. |
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