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Improvement of color retention properties of Ag deposition-based electrochromic device by introducing anion exchange membrane

Published online by Cambridge University Press:  10 April 2018

Shunsuke Kimura
Affiliation:
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, CHIBA 263-8522, Japan
Ryo Onodera
Affiliation:
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, CHIBA 263-8522, Japan
Kazuki Nakamura
Affiliation:
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, CHIBA 263-8522, Japan
Norihisa Kobayashi*
Affiliation:
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, CHIBA 263-8522, Japan
*
Address all correspondence to Norihisa Kobayashi at koban@faculty.chiba-u.jp
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Abstract

Ag deposition-based multicolor electrochromic (EC) device we reported can switch various optical states among transparent, black, silver, cyan, magenta, and yellow by only using electrochemical deposition of Ag. However, the EC device had poor color retention property under open-circuit state because of dissolution of deposited Ag metal by Cu2+ ions, which is essential because it acts as redox material at counter electrode. Here, we introduced an anion exchange membrane to separate Cu2+ from the Ag deposit. The improved device achieved longer retention time of colored state. It is effective to maintain the coloring state without electric power for practical application.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2018 

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