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. 2002 Aug 9;297(5583):983-7.
doi: 10.1126/science.1072651. Epub 2002 Jul 4.

Use of ionic liquids for pi-conjugated polymer electrochemical devices

Wen Lu  1 , Andrei G Fadeev, Baohua Qi, Elisabeth Smela, Benjamin R Mattes, Jie Ding, Geoffrey M Spinks, Jakub Mazurkiewicz, Dezhi Zhou, Gordon G Wallace, Douglas R MacFarlane, Stewart A Forsyth, Maria Forsyth
Affiliations

Use of ionic liquids for pi-conjugated polymer electrochemical devices

Wen Lu et al. Science. .

Abstract

pi-Conjugated polymers that are electrochemically cycled in ionic liquids have enhanced lifetimes without failure (up to 1 million cycles) and fast cycle switching speeds (100 ms). We report results for electrochemical mechanical actuators, electrochromic windows, and numeric displays made from three types of pi-conjugated polymers: polyaniline, polypyrrole, and polythiophene. Experiments were performed under ambient conditions, yet the polymers showed negligible loss in electroactivity. These performance advantages were obtained by using environmentally stable, room-temperature ionic liquids composed of 1-butyl-3-methyl imidazolium cations together with anions such as tetrafluoroborate or hexafluorophosphate.

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