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Issue 42, 2010
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Polymer nanocomposite ionogels, high-performance electrolyte membranes

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Abstract

A sol–gel synthesis using modified poly(methyl methacrylate) (PMMA) bearing trimethoxysilane groups and tetraethoxysilane (TEOS) allowed immobilization of very high loadings of ionic liquid [BMIm][NTf2] within nanocomposite PMMA-silica membranes. The ionic liquid (IL) provided both flexibility and ionic conductivity, while the silica nanofiller covalently bonded to the polymer chains maintained mechanical strength, as shown by a DMA and tensile test. Complex impedance spectroscopy evidenced a critical threshold in ionic conductivity around 76%, which was ascribed to an unusual transition from “polymer-in-salt” to “quasi-liquid” electrolyte behaviour. Outstanding IL loadings as high as 90 wt% were reached, resulting in the same ionic conductivity as the pure IL.

Graphical abstract: Polymer nanocomposite ionogels, high-performance electrolyte membranes

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Article information


Submitted
05 Jan 2010
Accepted
12 Mar 2010
First published
06 May 2010

J. Mater. Chem., 2010,20, 9456-9462
Article type
Paper

Polymer nanocomposite ionogels, high-performance electrolyte membranes

F. Gayet, L. Viau, F. Leroux, S. Monge, J. Robin and A. Vioux, J. Mater. Chem., 2010, 20, 9456
DOI: 10.1039/C000033G

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