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Use of Ionic Liquids for pi-Conjugated Polymer Electrochemical Devices

W. Lu, Santa Fe Science and Technology, Santa Fe, USA
A. G. Fadeev, Santa Fe Science and Technology, Santa Fe, USA
B. Qi, Santa Fe Science and Technology, Santa Fe, USA
E. Smela, Santa Fe Science and Technology, Santa Fe, USA
B. R. Mattes, Santa Fe Science and Technology, Santa Fe, USA
J. Ding, University of Wollongong
G. M. Spinks, University of Wollongong
J. Mazurkiewicz, University of Wollongong
D. Zhou, University of Wollongong
G. G. Wallace, University of Wollongong
D. R. MacFarlane, Monash University
S. A. Forsyth, Monash University
M. Forsyth, Monash University

Article comments

This article was originally published as Lu, W et al, Use of Ionic Liquids for Pi-Conjugated Polymer Electrochemical Devices, Science, 297, 2002, 983-987. Original article available here. DOI: 10.1126/science.1072651.

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 -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.

Suggested Citation

W. Lu, A. G. Fadeev, B. Qi, E. Smela, B. R. Mattes, J. Ding, G. M. Spinks, J. Mazurkiewicz, D. Zhou, G. G. Wallace, D. R. MacFarlane, S. A. Forsyth, and M. Forsyth. "Use of Ionic Liquids for pi-Conjugated Polymer Electrochemical Devices" Faculty of Engineering - Papers (2002).
Available at: http://works.bepress.com/gwallace/13