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Use of ionic liquids for π-conjugated polymer electrochemical devices

journal contribution
posted on 09.08.2002, 00:00 authored by W Lu, A Fadeev, B Qi, E Smela, B Mattes, J Ding, G Spinks, J Mazurkiewicz, D Zhou, G Wallace, D MacFarlane, S Forsyth, Maria ForsythMaria Forsyth
π-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 π-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.

History

Journal

Science

Volume

297

Issue

5583

Pagination

983 - 987

Publisher

American Association for the Advancement of Science

Location

Washington, DC

ISSN

0036-8075

eISSN

1095-9203

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2002, American Association for the Advancement of Science