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Proceedings Paper

Transports of ionic liquids in ionic polymer conductor network composite actuators
Author(s): Yang Liu; Sheng Liu; Junhong Lin; Dong Wang; Vaibhav Jain; Reza Montazami; James R. Heflin; Jing Li; Louis Madsen; Q. M. Zhang
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Paper Abstract

We investigate the influence of ionic liquids on the electromechanical performance of Ionic Polymer Conductor Network Composite (IPCNC) bending actuators. Two imidazolium ionic liquids (ILs) with one cation, which is 1-ethyl-3- methylimidazolium ([EMI+]), and two different anions, which are tetrafluoroborate ([BF4-]) and trifluoromethanesulfonate ([Tf-]), are chosen for the study. By combining the time domain electric and electromechanical responses, we developed a new model that describes the ion transports in IPCNC actuators. The time constant of excess cation and anion migration in various composite electrodes are deduced: 6s and 25s in RuO2/Nafion; 7.9s and 36.3s in RuO2/Aquivion; 4.8s and 53s in Au/PAH, respectively. NMR is also applied to provide quantitative measures of self-diffusion coefficients independently for IL anions and cations both in pure ILs and in ILs absorved into ionomers. All the results indicate that the motion of cation, in the studied pure ionic liquids, polymer matrix and conductor network composites, is faster than that of anion. Moreover, the CNC morphology is playing a crucial role in determining the ion transport in the porous electrodes.

Paper Details

Date Published: 9 April 2010
PDF: 8 pages
Proc. SPIE 7642, Electroactive Polymer Actuators and Devices (EAPAD) 2010, 76421A (9 April 2010); doi: 10.1117/12.847618
Show Author Affiliations
Yang Liu, The Pennsylvania State Univ. (United States)
Sheng Liu, The Pennsylvania State Univ. (United States)
Junhong Lin, The Pennsylvania State Univ. (United States)
Dong Wang, Virginia Polytechnic Institute (United States)
Vaibhav Jain, Virginia Polytechnic Institute (United States)
Reza Montazami, Virginia Polytechnic Institute (United States)
James R. Heflin, Virginia Polytechnic Institute (United States)
Jing Li, Virginia Polytechnic Institute (United States)
Louis Madsen, Virginia Polytechnic Institute (United States)
Q. M. Zhang, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 7642:
Electroactive Polymer Actuators and Devices (EAPAD) 2010
Yoseph Bar-Cohen, Editor(s)

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