Electrochromism of 3d transition metal oxides

Abstract

Thin films of 3d transition metal oxides, TiOx, MnOx, CrOx, CoOx and NiOx, were prepared by electron-beam evaporation. These films showed electrochromic behavior in a non-aqueous electrolyte such as 1M LiClO4/γ-butylolactone. Structural, electrochromic and electrochemical properties were studied. Among these 3d metal oxides, NiOx and TiOx films were found to be most promising for ion storage oxides in terms of cyclic stability. Particularly, it was found that the NiOx film was an excellent anode with the highest coloration effciency of the films studied. © 1991.