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Fabricating polypyrrole/tungsten oxide hybrid based electrochromic devices using different ionic liquids
Author(s) -
Dulgerbaki Cigdem,
Oksuz Aysegul Uygun
Publication year - 2016
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3601
Subject(s) - electrochromism , ionic liquid , materials science , hexafluorophosphate , tetrafluoroborate , polypyrrole , electrochromic devices , cyclic voltammetry , nanocomposite , electrochemistry , oxide , imide , chemical engineering , composite number , inorganic chemistry , polymer chemistry , nanotechnology , organic chemistry , composite material , polymer , chemistry , electrode , engineering , metallurgy , polymerization , catalysis
A facile approach of polypyrrole (PPy)/tungsten oxide (WO 3 ) composites electrosynthesized in ionic liquids for fabrication of electrochromic devices is discussed. The electrochromic properties of PPy/tungsten oxide nanocomposite films (PPy/WO 3 ) prepared in the presence of four different ionic liquids, 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMIMBF 4 ), 1‐butyl‐3‐methylimidazolium hexafluorophosphate (BMIMPF 6 ), 1‐butyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl) imide (BMIMTFSI), and 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI) were investigated in detail. Cyclic voltammetry results revealed that PPy/WO 3 nanocomposite films have much more electrochemical activity than those of WO 3 and PPy film. The electrochromic contrast, coloration efficiency, and switching speed of the composite films were determined for electrochromic characteristics. The maximum contrast and the maximum coloration efficiency values were measured as 33.25% and 227.89 cm 2 /C for the PPy/WO 3 /BMIMTFSI composite film. Copyright © 2015 John Wiley & Sons, Ltd.