Thin films of 3d transition metal oxides, TiOx, MnOx, CrOx, CoOxand 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, NiOxand TiOxfilms were found to be most promising for ion storage oxides in terms of cyclic stability. Particularly, it was found that the NiOxfilm was an excellent anode with the highest coloration effciency of the films studied. © 1991.
Seike, T., & Nagai, J. (1991). Electrochromism of 3d transition metal oxides. Solar Energy Materials, 22(2–3), 107–117. https://doi.org/10.1016/0165-1633(91)90010-I