Journal
MATERIALS TODAY COMMUNICATIONS
Volume 30, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2021.103090
Keywords
PVDF gel electrolyte; High transmittance; Electrochromic devices; Large area
Categories
Funding
- National Key Research and Development Program of China [2018YFD0700200]
- Natural Science Foundation of Guangdong Province [2018A0303130146]
- Project of Science and Technology of Guangzhou [201904010171]
- Key Research and Development Program of Guangzhou [202007020004]
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This study successfully prepared PVDF gel electrolytes with high ionic conductivity and excellent mechanical properties through a simple method, providing a new idea for the preparation of WO3 gel ECDs and successfully extending their lifetime.
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.
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