Process for preparation of an electrode structure containing WO.sub.3 use of the structure in an electrochromic cell

Abstract

A counter electrode structure of a transition metal electrochromic compound for use in an electro-optical device, which is useful in control of visible and infrared absorption by windows, in data display devices and the like, typically comprising in sandwich arrangement a pair of electrodes, and disposed therebetween, a layer of transition metal electrochromic compounds and a semi-solid highly conductive sulfuric acid gel electrolyte, one of the electrodes being said counter electrode. The gel exhibits good conductivity, stability and compatibility with the electrochromic layers. The present counter electrode is more efficient and has a longer lifetime.

Dependencies are inferred from the claim text.