一种具有晶体WO和凝胶电解质的新型电致变色器件的研究。

Study of a Novel Electrochromic Device with Crystalline WO and Gel Electrolyte.

作者信息

Chen Wanyu, Zhang Guixia, Wu Lili, Liu Siyuan, Cao Meng, Yang Ying, Peng Yong

机构信息

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Polymers (Basel). 2022 Mar 31;14(7):1430. doi: 10.3390/polym14071430.

DOI:10.3390/polym14071430

PMID:35406303

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9002927/

Abstract

Most ECDs are coated with an electrochromic material on the transparent conductive oxide (TCO) substrate. A novel electrochromic device (ECD), having a variable optical performance, was prepared by using tungsten foil as a substrate in this study. It was found that the WO discoloration layer, having a monoclinic phase crystalline structure made of 600 °C calcined, had optimum charge transmission performance with PADA gel polymer electrolyte. Ionic conductivity of PADA gel polymer electrolyte was 2.3 × 10 S cm at -20 °C, and it was possible to help Li to implement embedding and extraction from WO even in low-temperature conditions. The colored time (t) and the bleached time (t) of the electrochromic device were 15 s and 26 s, and it showed yellowish-brown in the colored state and navy blue in the bleached state. The ECD (WO-600) exhibited good cycle stability reach at least 150 times.

摘要

大多数电致变色器件（ECD）在透明导电氧化物（TCO）基板上涂覆有一层电致变色材料。本研究中，通过使用钨箔作为基板制备了一种具有可变光学性能的新型电致变色器件（ECD）。研究发现，由600℃煅烧制成的具有单斜相晶体结构的WO变色层，与PADA凝胶聚合物电解质具有最佳的电荷传输性能。PADA凝胶聚合物电解质在-20℃时的离子电导率为2.3×10 S cm，即使在低温条件下也能够帮助Li在WO中实现嵌入和脱出。该电致变色器件的着色时间（t）和褪色时间（t）分别为15秒和26秒，其在着色状态下呈黄褐色，在褪色状态下呈深蓝色。该ECD（WO-600）表现出良好的循环稳定性，至少可达150次。