Influence of temperature on the impedance of ionic polymer metal composites

Title
Influence of temperature on the impedance of ionic polymer metal composites
Authors
차영수Hubert KimMaurizio Porfiri
Keywords
Ionic polymer metal composites; Thermal analysis; Diffusion
Issue Date
2014-10
Publisher
Materials letters
Citation
VOL 133, 179-182
Abstract
In this letter, we study the effect of temperature on the electric impedance of ionic polymer metal composites (IPMCs). Experiments are performed on in-house fabricated Nafion-based samples for temperatures varying from 25 to 40 degrees C. By using a recently proposed physics-based circuit model, we identify the equivalent resistance, capacitance and Warburg impedance of each sample, and characterize their dependence on temperature. We find that the resistance and the capacitance decrease as the temperature increases, while the Warburg impedance increases. Such variations are ultimately associated with the effect of temperature on the dielectric constant and the diffusivity of the IPMC. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://pubs.kist.re.kr/handle/201004/51031
ISSN
0167577X
Appears in Collections:
KIST Publication > Article
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