Proton conducting polymer composites for electrochromic devices

This report describes composite proton electrolytes composed of nanosize zi rconium phosphate or antimonic acid particles suspended in a poly(vinyl ace tate)/glycerin gel matrix. The proton conductivity was 10(-3)-10(-4) S/cm a t room temperature, thermal stability prevailed up to at least 110 degrees C, and compatibility was found with oxide electrodes; these properties make s the electrolyte suitable for use in solid state electrochemical devices. The temperature dependence of the conductivity was found to obey the Willia ms-Landel-Ferry relationship at temperatures over 60 degrees C, thus sugges ting that the ion conductivity in the composite electrolyte can be describe d by mechanisms normally taken to be valid for Liquid ion conductors. (C) 1 999 Elsevier Science BN. All rights reserved.