Abstract: A method of manufacturing an electrochromic device, which includes the steps of: (a) forming a plurality of nano-electrochromic elements on a transparent conductor of a transparent conductor substrate, wherein the nano-electrochromic elements are bonded together to form an electrochromic layer on the transparent conductor substrate so as to define a reaction surface of the electrochromic layer; (b) applying an electrolyte on the electrochromic layer; and (c) electrolyzing the electrolyte such that ions in the electrolyte are displaced into the electrochromic layer through the reaction surface thereof to alter an optical characteristic of the electrochromic elements.