Thin and porous polymer membrane-based electrochromic devices

Taeyeong Han, Cyril Bubu Dzakpasu, Dohwan Kim, Seokwoo Kim, Yong Cheol Jeong, Myung Hyun Ryou, Yong Min Lee

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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 WO 3 /W-NiO EC devices with 1 M LiClO 4 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.

Original languageEnglish
Pages (from-to)1042-1047
Number of pages6
JournalJournal of Materials Chemistry C
Volume7
Issue number4
DOIs
StatePublished - 2019

Bibliographical note

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

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