Preparation of WO3 gel electrochromic device by simple two-step method. (March 2022)

• Record Type: Journal Article
• Authors: Liu, Yangbiao; Cai, Xuesong; Xiao, Xiudi; Wang, Jixi; Sheng, Guizhang; Xu, Gang
• Is Part Of: Materials today communications. Volume 30(2022)
• Publication Date: 2022-03
• Subjects: PVDF gel electrolyte -- High transmittance -- Electrochromic devices -- Large area; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.103090
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: Gel electrochromic devices (gel ECDs) have promising application prospects in smart windows due to their energy-saving effects and superior electrochromic performance. However, the rapid preparation of gel electrolytes is one of the reasons limiting the further promotion of gel ECDs. In this work, we proposed a simple doctor blade method to prepare PVDF gel electrolytes with high ionic conductivity (3.7 * 10 −3 S cm −1 ) and excellent mechanical properties (268% strain), accompanied by high transmittance (exceeding 95% within 600–1100 nm). And we also prepared WO3 gel ECDs by using PVDF gel electrolytes as electrolyte layer. Compared with liquid ECDs, WO3 gel ECDs' lifetime has increased by 33%, mainly due to the increased oxidation potential with PVDF gel electrolyte addition, enhancing oxidation resistance. In addition, the large-area flexible gel ECDs (6 * 10 cm 2 ) were assembled, which provides practical guidance for preparing large-area flexible gel ECDs in the future.