Electrochemically lithiated V₂O₅ films: An optically passive ion storage for transparent electrochromic devices

Li_yV₂O₅ films were produced by reactive de magnetron sputtering followed by electrochemical posttreatment in LiClO₄. X-ray diffraction showed an orthorhombic structure. Spectrophotometric transmittance and reflectance measurements demonstrated that the luminous and solar absorptance increased moderately when y increased from zero to unity. It is argued that Li_yV₂O₅ is useful as an ion storage material operating in conjunction with electrochromic films.