Use of Ionic Liquids for π-Conjugated Polymer Electrochemical Devices

作者：Wen Jing Lu, Andrei G. Fadeev, Baohua Qi, Elisabeth Smela, Benjamin R. Mattes, Jie Ding, Geoffrey M. Spinks, J. Mazurkiewicz, Dezhi Zhou, Gordon G. Wallace, Douglas Robert MacFarlane, Stewart A. Forsyth, Maria Forsyth · 发表于：Science · 年份：2002 · DOI：10.1126/science.1072651 · 被引用次数：1179 · 研究领域：Conducting polymers and applications、Ionic liquids properties and applications、Advanced Sensor and Energy Harvesting Materials

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.