Electrodeposited Films from Aqueous Tungstic Acid-Hydrogen Peroxide Solutions for Electrochromic Display Devices

摘要: Electrodeposited tungsten oxide films from aqueous tungstic acid-hydrogen peroxide solutions were investigated for applications to electrochromic devices. These exhibited electrochromism in aprotic electrolyte containing Li-salts. When the heat-treated an hour at temperatures between 100 and 200°C, reactions rich reversibility. The coloring efficiency response rate favorable comparable those trioxide evaporated films. A cell life-test was performed on several clock-size cells by applying a 1.2-V, 1-Hz, continuous square wave. typical amount of charge required coloration about 50 C / m2 remained unchanged even after 107 coloration-bleaching cycles.