[7a-C23-1~10] 6.4 Thin films and New materials

[7a-C23-7] Electrochromic properties of NiOOH and WO₃ thin films prepared by sputtering in Nafion dispersion electrolyte

〇Yasunari Nozaki¹, Ryosuke Mochizuka¹, Yoshio Abe¹, Midori Kawamura¹, Kyung Ho Kim¹, Takayuki Kiba¹ (1.Kitami Inst.)

Keywords:Nickel hydroxide thin film, Tungsten oxide thin film, Nafion dispersion

Transition metal oxides such as NiOOH and WO 3 exhibit electrochromic (EC) characteristics that change color by electrochemical redox reaction, application to smart windows is expected.We are aiming at developing complementary EC elements combining NiOOH and WO3, but dissolution of samples is concerned with liquid electrolytes.Therefore, in this study, EC characteristics of NiOOH and WO 3 thin films were evaluated using Nafion dispersion which is a proton conductive polymer electrolyte.