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The Investigation of the Charge Transport Properties of Ionic Liquids in Response to Step Voltages in Ionic Polymer Actuators

Published online by Cambridge University Press:  19 August 2014

Jun-Hong Lin
Jun-Hong Lin*
Affiliation:
Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan, Republic of China.
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Abstract

Developing advanced ionic electroactive devices such as ionic actuators and supercapacitors requires the understanding of charge drifting and diffusion processes, which depends on the distances over which the ions travel. The charge dynamics of Aquivion membrane actuators with EMI-Tf ionic liquid are investigated over a broad film thickness (d) range. A time domain charge dynamic method based on Poisson-Nernst-Planck relation is employed to evaluate the charge transport behaviors in the actuators. It is found that for the initial charging process the double layer time τDL is linearly proportional to the film thickness (d). However, for the later charging process under a high applied voltage (>0.5V ) where the substantial electromechanical reaction occurs, the charge transport behavior does not follow the d2 dependence as predicted by the random walk diffusion model. For comparison the charge dynamics of BMI-PF6 ionic liquid films without polymer was also investigated.

Keywords

actuatorionic conductorelectrical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1660: Symposium TT – Transport Properties in Nanocomposites , 2014 , mrsf13-1660-tt03-24
Copyright
Copyright © Materials Research Society 2014 

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References

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