Engineering and Technology

Multifunctional electrochromic energy storage devices by chemical cross-linking: impact of a WO3·H2O nanoparticle-embedded chitosan thin film on amorphous WO3 films

B. Koo, M. Jo, et al.

Discover groundbreaking advancements in multifunctional electrochromic energy storage devices with the innovative hybrid films created by Bon-Ryul Koo and colleagues at Seoul National University of Science and Technology. These films exhibit remarkable switching speeds, enhanced coloration efficiency, and impressive energy storage capabilities, revolutionizing the future of electrochromics!

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Abstract

This paper explores the design of hybrid films consisting of WO3·H2O nanoparticle (WHNP)-embedded chitosan thin films on amorphous WO3 (a-WO3) films for multifunctional electrochromic (EC) energy storage devices. The chemical cross-linking between chitosan and WHNPs resulted in faster switching speeds (4.0 s coloration, 0.8 s bleaching), higher coloration efficiency (62.4 cm²/C), and improved long-cycling retention (91.5% after 1000 cycles) compared to bare a-WO3 films. The hybrid films also demonstrated high specific capacitance (154.0 F/g at 2 A/g) and stable rate capability for energy storage, leading to brighter illumination of a white-light-emitting diode.

Publisher

NPG Asia Materials

Published On

Jan 01, 2020

Authors

Bon-Ryul Koo, Myeong-Hun Jo, Kue-Ho Kim, Hyo-Jin Ahn

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