| abstract |
(57) [Problem] To provide an electrochromic device having good responsiveness of color erasing / discharging even at a low temperature. SOLUTION: WO 3 · a is used as an electrochromic layer. Nb 2 O 5 · bH 2 O 2 · cH 2 O ( where, a, b, c Wherein the electrolyte layer includes a cation source for coloring the electrochromic layer, a redox agent for reversibly oxidizing and reducing the electrochromic layer, an organic solvent for dissolving the cation source and the redox agent, Consists of water. |