| 摘要 |
An electrochromic device comprises an oxidative-coloration layer between a pair of electrodes, said oxidative-coloration layer being composed of a film of a metal oxyhydroxide represented by the formula: MOx(OH)y wherein M is a metal of group VIII of the periodic table, x is a number satisfying 0<x<1, and y is a number satisfying 1<y<2.
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