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Proceedings Paper

New solid electrolytes for electrochromic smart windows
Author(s): G. Frand; C. Rousselot; Odile Bohnke
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Paper Abstract

Viscosity and ionic conductivity were carried out on gel electrolytes made of highly amorphous polymer, poly(methylmethacrylate), LiClO4 salt, and a solvent of high boiling temperature, propylene carbonate. In the composition range 0 weight % - 35 weight % of PMMA in the gel, the conductivity decreases very slightly as the amount of PMMA increases. On the other hand, a large increase of viscosity is observed. This result is interpreted on the basis that, from a microscopic point of view, the gel may be seen as a free liquid electrolyte encaged in a polymer matrix. For amounts of PMMA larger than 35 weight % the conductivity decreases more rapidly. These gels are transparent in the visible region, thermally stable in a large domain of temperatures, i.e., -65 degree(s)C, +160 degree(s)C and electrochemically stable, i.e., (Delta) V equals 4.5 V. They are good candidates as `solid electrolytes' for the realization of solid state electrochromic `smart' windows.

Paper Details

Date Published: 25 November 1992
PDF: 8 pages
Proc. SPIE 1728, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows, (25 November 1992); doi: 10.1117/12.130554
Show Author Affiliations
G. Frand, Univ. de Franche-Comte (France)
C. Rousselot, Univ. de Franche-Comte (France)
Odile Bohnke, Univ. de Franche-Comte (France)


Published in SPIE Proceedings Vol. 1728:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Chromogenics for Smart Windows

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