The catalyst ink preparation for a catalyst layer production by screen printing for a direct methanol fuel cell (DMFC) is evaluated. Among a large variety of solvents 1-hexanol was chosen for the preparation due to its properties fitting the requirements for the ink preparation. 1-hexanol based catalyst inks lead to thicker catalyst layers compared to isopropyl-/propylalcohol based catalyst inks, currently used in-house. Despite showing different layer properties, MEAs based on 1-hexanol or isopropyl-/propylalcohol based catalyst layers show comparable electrochemical performances. When using 1-hexanol based catalyst inks the dispersion procedure shows great influence on the outcoming catalyst layer. Long dispersion periods and a medium power output of ultrasonication of the catalyst dispersion are beneficial and lead to good coating qualities of the catalyst layer and therefore to high electrochemical performances.
1-Hexanol Based Catalyst Inks for Catalyst Layer Preparation for a DMFC
Forschungszentrum Jülich GmbH
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received July 17, 2012; final manuscript received July 29, 2013; published online October 10, 2013. Assoc. Editor: Umberto Desideri.
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Hürter, S., Wannek, C., Müller, M., and Stolten, D. (October 10, 2013). "1-Hexanol Based Catalyst Inks for Catalyst Layer Preparation for a DMFC." ASME. J. Fuel Cell Sci. Technol. December 2013; 10(6): 061008. https://doi.org/10.1115/1.4025519
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