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Proceedings Paper

Fabrication of ion-conducting carbon-polymer composite electrodes by spin-coating
Author(s): Inga Põldsalu; Sven-Erik Mändmaa; Anna-Liisa Peikolainen; Arko Kesküla; Alvo Aabloo
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Paper Abstract

We report a fabricating method for ion-conducting carbon electrodes on top of industrially produced PVDF membrane by spin-coating. Spin-coating is desirable due to its potential application in large-scale actuator manufacturing and its possibility to produce very thin electrodes. The industrial grade membrane was chosen in order to investigate more accurately the results of spin-coating without considering the deviations present in a hand-made membrane. Spin-coating and surface resistivity measurements via four-point probe were described in further detail. The production process of electrode suspension and suspension dispensing were developed and fine-tuned. The spin coater was programmed to obtain electrodes with uniform electrical properties. The arrangement of the spin coater was slightly altered to remove swelling and bubble formation effects concurrent with usage of the porous membrane. Electrodes produced with the developed method were measured and analyzed. Thickness of the film was measured with micrometer screw gauge and four-point probe was used to measure sheet resistivity, in addition film was studied under scanning electron microscope. In best cases the coefficient of variation for sheet conductivity was 6.2%. For all electrode sheet conductivities the median coefficient of variation was 7%. The thickness of the electrodes varied from 6 to 23 μm. As a proof of concept for the developed method a working actuator with spin-coated electrodes was produced.

Paper Details

Date Published: 1 April 2015
PDF: 10 pages
Proc. SPIE 9430, Electroactive Polymer Actuators and Devices (EAPAD) 2015, 943019 (1 April 2015); doi: 10.1117/12.2084180
Show Author Affiliations
Inga Põldsalu, Univ. of Tartu (Estonia)
Sven-Erik Mändmaa, Univ. of Tartu (Estonia)
Anna-Liisa Peikolainen, Univ. of Tartu (Estonia)
Arko Kesküla, Univ. of Tartu (Estonia)
Alvo Aabloo, Univ. of Tartu (Estonia)

Published in SPIE Proceedings Vol. 9430:
Electroactive Polymer Actuators and Devices (EAPAD) 2015
Yoseph Bar-Cohen, Editor(s)

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