Manufacturing of catalyst layers is one of the key processing steps in making membrane electrode assemblies (MEAs) for direct methanol fuel cells (DMFCs). The catalyst ink, which usually contains catalysts, ionomers, solvents, and additives, is generally applied to the substrate by a wet-coating technique. Established coating techniques which are used for manufacturing catalyst layers for fuel cells are knife-coating, screen-printing, and spraying. Slot-die coating is also an established coating technique, but not currently used for making fuel cell electrodes. For each coating technique the properties of the catalyst layer will depend on the properties of the coating technique and the properties of the substrate. Also each coating technique requires the catalyst ink to be adjusted to its specific rheological requirements. In this study, slot-die coating is developed as a new method for the continuous manufacture of catalyst layers for direct methanol fuel cells. The rheological demands for a homogeneous layer thickness are studied with model inks and a suitable catalyst ink is prepared. With this ink, decal electrodes are fabricated and CCM-type MEAs are made. Fuel cell tests show that the performance of the slot-die coated electrodes is comparable to electrodes made by knife-coating.
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August 2013
This article was originally published in
Journal of Fuel Cell Science and Technology
Technical Briefs
Slot-Die Coating: A New Preparation Method for Direct Methanol Fuel Cells Catalyst Layers
Andreas Glüsen,
Andreas Glüsen
1
e-mail: a.gluesen@fz-juelich.de
1Corresponding author.
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Detlef Stolten
Detlef Stolten
Forschungszentrum Jülich GmbH,
Institute of Energy and Climate Research,
IEK-3:
Institute of Energy and Climate Research,
IEK-3:
Electrochemical Process Engineering
,52425 Jülich
, Germany
Search for other works by this author on:
Andreas Glüsen
e-mail: a.gluesen@fz-juelich.de
Detlef Stolten
Forschungszentrum Jülich GmbH,
Institute of Energy and Climate Research,
IEK-3:
Institute of Energy and Climate Research,
IEK-3:
Electrochemical Process Engineering
,52425 Jülich
, Germany
1Corresponding author.
Contributed by the Advanced Energy Systems Division of ASME for publication in the Journal of Fuel Cell Science and Technology. Manuscript received March 20, 2013; final manuscript received May 15, 2013; published online June 17, 2013. Editor: Nigel M. Sammes.
J. Fuel Cell Sci. Technol. Aug 2013, 10(4): 044503 (4 pages)
Published Online: June 17, 2013
Article history
Received:
March 20, 2013
Revision Received:
May 15, 2013
Citation
Glüsen, A., Müller, M., and Stolten, D. (June 17, 2013). "Slot-Die Coating: A New Preparation Method for Direct Methanol Fuel Cells Catalyst Layers." ASME. J. Fuel Cell Sci. Technol. August 2013; 10(4): 044503. https://doi.org/10.1115/1.4024607
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