Electrochromic device with side-by-side structure and application thereof

An electrochromic device with side-by-side structure, comprising:

• a common electrode unit, comprising an electrode layer and an electrode protection layer disposed on the electrode layer;
• at least one color-changing unit, comprising a transparent conductive layer and a color-changing layer disposed on the transparent conductive layer;
• wherein the common electrode unit and each color-changing unit are arranged on the same plane with an insulating region between two adjacent units;
• and
• an electrolyte layer, covering the electrode protection layer of the common electrode unit and the color-changing layer of each color-changing unit, and connecting the electrode protection layer of the common electrode unit and the color-changing layer of each color-changing unit;
• wherein the electrode protection layer is made of a material capable of blocking discoloration ions from bombarding the electrode layer.