Catalyst agglomerates for membrane electrode assemblies
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United States of America Patent
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Jun 28, 2005
Grant Date -
Jul 17, 2003
app pub date -
Nov 21, 2002
filing date -
Nov 21, 2001
priority date (Note) -
Expired
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Abstract
A method of preparing catalyst agglomerates for electrochemical devices is provided. The method comprises dispersing particles of a catalyst in a non-aqueous solvent to form a dispersion of the catalyst, adding an ion conducting polymer in a dilute solution to the dispersion of the catalyst under agitation to form catalyst agglomerates, and stirring the dispersion of the catalyst and the catalyst agglomerates to control the growth of the agglomerates. A directly applicable catalyst composition is also provided. The catalyst composition comprises the catalyst agglomerates prepared according to the present invention, a solvent to plasticize surfaces of the catalyst agglomerates and the membrane, and a non-aqueous carrier solvent.
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