PEDOT/WO3 Hybrid Nanofiber Architectures for High Performance Electrochromic Devices

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• 作者：Cigdem Dulgerbaki ; Neslihan Nohut Maslakci ; Ali Ihsan Komur and Aysegul Uygun Oksuz
• 刊名：Electroanalysis
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：28
• 期：8
• 页码：1873-1879
• 全文大小：1495K
• ISSN：1521-4109

文摘

This study focuses on the electrochromic device (ECD) applications of poly(3,4-ethylenedioxythiophene)/tungsten oxide (PEDOT/WO₃) hybrid nanofibers prepared via electrospinning method. Nanoporous WO₃ films were initially electrosynthesized on Pt sheet. The PEDOT layer was electropolymerized onto the entire surface of the WO₃ nanoporous host framework in the presence of different ionic liquids: 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF₄), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF₆), 1-butyl- 3-methylimidazolium bis(trifluoromethylsulfonyl) imide (BMIMTFSI), and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI). The morphological features and elemental surface characterization of hybride nanofibers were monitored by scanning electron microscopy and energy dispersive X-ray spectroscopy. ECDs changed color reversibly from transparent to light brown by switching from +3 V to −3 V. It was found that the highest optical modulation of 47.89 % and maximum coloration efficiency of 363.72 cm²/C is achieved for PEDOT/WO₃/BMIMPF₆ based electrochromic device. Hybrid nanofibers exhibited excellent long term stability even after 1000 chronoamperometric cycles. This work could not only push forward the facile preparation of PEDOT/WO₃ nanofibers but also represent, for the first time, the possibility that the hybrid nanofibers could be a promising material for the highly efficient ECDs.