电致变色
无定形固体
电解质
图层(电子)
薄膜
电化学
化学工程
多孔性
纳米技术
材料科学
电致变色装置
电极
化学
复合材料
有机化学
物理化学
工程类
作者
Jing Zeng,Yan Su,Jinshuo Bai,Yinan Zhang,Guixiang Yang,Dequan Zhang,Zhifeng Liu,Xiaoping Liang
标识
DOI:10.1016/j.jelechem.2023.117969
摘要
WO3 is currently the most widely used and promising electrochromic material, but the preparation of WO3 thin films with excellent optoelectronic properties is a formidable challenge. The amorphous WO3/ordered porous crystalline WO3 stacked films (a-WO3/OP-c-WO3) were prepared by electrodeposition-assisted sol–gel method with polystyrene (PS) spheres as the templates. The microstructure and properties of a-WO3/OP-c-WO3 films were significantly influenced by electrodeposition time (150 s ∼ 300 s). The optimized a-WO3/OP-c-WO3 films exhibited even better electrochromic properties (at 633 nm) with high cycling stability, superior optical modulation (53.9 %), fast response time (3.9 s/6.1 s for bleaching /coloration), and especially high coloration efficiency (51.3 cm2/C), compared with OP-c-WO3 film (25.1 cm2/C) and a-WO3 film (35.2 cm2/C), which is unique synergistic effect between the top layer of a-WO3 and the bottom layer of OP-c-WO3 film. The ordered porous structure allows the film to fully contact with the electrolyte, thereby providing a greater specific surface area and more active sites for the electrochemical reaction. The electrochromic device (EDC) prototype assembled with a-WO3/OP-c-WO3 laminated film as the electrochromic layer has better electrochromic properties.
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