Thin and porous polymer membrane-based electrochromic devices. Issue 4 (9th January 2019)

• Record Type: Journal Article
• Authors: Han, Taeyeong; Dzakpasu, Cyril Bubu; Kim, Dohwan; Kim, Seokwoo; Jeong, Yong-Cheol; Ryou, Myung-Hyun; Lee, Yong Min
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 4(2019)
• Page Start: 1042
• Page End: 1047
• Publication Date: 2019-01-09
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8tc05157g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A newly fabricated electrochromic (EC) device with a thin and porous PVdF-HFP membrane enabled faster coloring and bleaching rates, and exhibited higher stability than its non-porous counterpart. Abstract : An electrochromic (EC) device based on a thin and porous polymer membrane was newly fabricated for large-area applications such as smart windows. The pore structure of the poly(vinylidene fluoride- co -hexafluoropropylene) (PVdF-HFP) membrane was generated by extracting the pore generation material, dibutyl phthalate (DBP), from the cast film consisting of PVdF-HFP and DBP. The thickness of the porous polymer membrane was controlled to be very thin (approximately 30 μm), and the membrane was used to assemble WO3 /W-NiO EC devices with 1 M LiClO4 in propylene carbonate as liquid electrolyte. Since the porous polymer membrane has a higher ionic conductivity than the non-porous one, the EC device with the porous polymer membrane showed a much higher current density in cyclic voltammetry even at a high scanning rate, faster color changing speed, and better stability after 500 cycles.