High performance catalyzed membranes of ultra-low Pt loadings for polymer electrolyte fuel cells

This paper reports on polymer electrolyte membranes that are catalyzed by the direct application of thin film catalyst layers cast from solutions of suspended Pt/C catalyst and solubilized Nafion ionomer. Both the ionomeric membrane and the solubilized ionmer are in the Na{sup +} form during casting...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1992-02, Vol.139 (2), p.L28-L30
Main Authors: WILSON, M. S, GOTTESFELD, S
Format: Article
Language:English
Subjects:
30 DIRECT ENERGY CONVERSION
300501 - Fuel Cells- Design & Development
300502 - Fuel Cells- Performance & Testing
300503 - Fuel Cells- Materials, Components, & Auxiliaries
400400 - Electrochemistry
CARBON
CATALYTIC EFFECTS
CHEMISTRY
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTS
Exact sciences and technology
FABRICATION
FUEL CELLS
General and physical chemistry
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Kinetics and mechanism of reactions
MATERIALS TESTING
MEMBRANES
METALS
NONMETALS
PLATINUM
PLATINUM METALS
POLYMERS
SOLID ELECTROLYTE FUEL CELLS
TESTING
TRANSITION ELEMENTS
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Description
Summary:This paper reports on polymer electrolyte membranes that are catalyzed by the direct application of thin film catalyst layers cast from solutions of suspended Pt/C catalyst and solubilized Nafion ionomer. Both the ionomeric membrane and the solubilized ionmer are in the Na{sup +} form during casting to enable higher curing temperatures, which results in more robust catalyst layers. In addition to simplifying the fabrication process, the direct application apparently provides enhanced bonding at the interface between the membrane and the catalyst layer. Consequently, the performances of fuel cells utilizing these catalyzed membranes with ultra-low platinum loading are superior to those achieved with other approaches to polymer electrolyte membranes of low Pt loading.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2069277