ELECTROCHROMIC DEVICE AND METHOD FOR PRODUCING SAME

摘要

The present invention relates to electrochromic devices and methods for functionalizing cellulose-based materials, in production and post-production stages, in order to obtain solid-state electrochromic devices. The invention is in the field of electrochemistry. These functionalized cellulose-based materials have typical electrochromic characteristics, specifically the ability of changing its oxidation state, leading to a modification of its physical properties, shown by a color change when submitted to an electric potential difference, being this color change reversible. The color is kept in the absence of any electric stimulus, revealing a memory effect. An example of an electrochromic device of the present invention is comprised of a cellulose-based material, which is soaked with a dispersion of electrochromic inorganic material nanoparticles or with a solution of electrochromic organic molecules, wherein the solution/dispersion contains at least one salt, and is finished by deposition of an electrode in each side of the cellulose-based material, wherein at least one of the electrodes is transparent.