POLYMER ELECTROLYTES FOR ELECTROCHROMIC WINDOW APPLICATIONS

Polymer electrolytes suitable for use in electrochromic window devices for architectural applications have been developed. The electrolyte p roperties required for a large area, long lifetime, long cycle life an d wide temperature range application such as this place some restricti ons on the type of polymer system required. The electrolytes developed in this work are based on LiClO4 in a polyether copolymer which is cu red in place to produce a clear elastomer. The material properties and conductivity of electrolytes with and without the plasticizers are pr esented. Electrochromic device performance tests show that the electro lyte impedance is a factor in the device performance, but not the limi ting factor.