“…This interesting property led to the many applications such as automatic anti-glazing mirror [1], smart windows [2], electrochromic displays [3,4], and chameleon materials [5][6][7]. Up to date, a wide variety of electrochromic materials have been developed, which included inorganic metal oxides such as tungsten trioxide (WO 3 ) or iridium dioxide (IrO 2 ) [8], mixed-valence metal complexes such as Prussian blue [9], small organic molecules such as viologen and phthalocyanine derivatives, and conjugated conducting polymers [10][11][12][13][14].…”