ALL-SOLID-STATE COMPLEMENTARY ELECTROCHROMIC WINDOWS-BASED ON THE OXYMETHYLENE-LINKED POLYOXYETHYLENE COMPLEXED WITH LICLO4

Oxymethylene-linked polyoxyethylene complexed with LiClO4 at a Li/EO m olar ratio of 0.05 has a conductivity of 4.7 x 10(-4) S.cm(-1) at 25 d egrees C and a transmittancy of 90%. It is a promising electrolyte for an all-solid-state complementary electrochromic window using WO3 and NiOx. The modulation depth of the window exceeds 50% from 700 nm to 90 0 nm. The electrochromic ability of the window increases with temperat ure and lithium salt concentration and the window also exhibits good s torage property under open circuit. Current and optical responses of t he window as well as the electrochromic process are also discussed. (C ) 1997 John Wiley & Sons, Inc.