https://scholars.lib.ntu.edu.tw/handle/123456789/630799
標題: | Stable viologen-based electrochromic devices: Control of Coulombic interaction using multi-functional polymeric ionic liquid membranes | 作者: | Yu, Hsin Fu Li, Chun Ting KUO-CHUAN HO |
關鍵字: | Electrochromism | Electrospinning | Membrane | Polymeric ionic liquid | Viologen | 公開日期: | 15-一月-2023 | 出版社: | ELSEVIER | 卷: | 250 | 來源出版物: | Solar Energy Materials and Solar Cells | 摘要: | Newly designed polymeric ionic liquid, poly(vinylidene fluoride-co-difluorovinylidene aminooxoethyl-1-butylimidazolium-co-vinylidene aminooxoethyl-1-butylimidazolium tetrafluoroborate) (denoted as PFI-BF4), were successfully synthesized with an intention to form the stable electrospun membranes as quasi-solid-state electrolytes for the use in the electrochromic devices (ECDs). The fluorine atoms in the PFI-BF4 membranes could restrain viologen from being quenched on the cathode. The incorporation of imidazolium entities in the PFI-BF4 membranes could enhance the electrochemical stability and lower the charge transfer resistance at the electrolyte/cathode interface due to the suppression of viologen which are being trapped on the membranes. With an optimal molar ratio of imidazoliums to fluorines on the PFI-BF4 membranes, the viologens would be nearly free from aggregation since the Coulombic attraction towards fluorines and the Coulombic repulsion towards imidazoliums reach equilibrium. After a systematic investigation, the PFI-BF4_1.5 ECD exhibited a high transmittance change (ΔT) of 73.0%, with an effective coloration efficiency (ηe) of 460 cm2 C-1 at 600 nm and fast response times (bleaching time of 3.9 s and coloring time of 1.7 s). Most importantly, the PFI-BF4_1.5 ECD retained 95.9% and 88.3% of its initial ΔT after 10,000 and 50,000 continuous switching cycles, respectively. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630799 | ISSN: | 09270248 | DOI: | 10.1016/j.solmat.2022.112072 |
顯示於: | 化學工程學系 |
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