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Catalyst inks and method of application for direct methanol fuel cells

United States Patent

February 24, 2004
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Direct Methanol Fuel Cells
Inks are formulated for forming anode and cathode catalyst layers and applied to anode and cathode sides of a membrane for a direct methanol fuel cell. The inks comprise a Pt catalyst for the cathode and a Pt--Ru catalyst for the anode, purified water in an amount 4 to 20 times that of the catalyst by weight, and a perfluorosulfonic acid ionomer in an amount effective to provide an ionomer content in the anode and cathode surfaces of 20% to 80% by volume. The inks are prepared in a two-step process while cooling and agitating the solutions. The final solution is placed in a cooler and continuously agitated while spraying the solution over the anode or cathode surface of the membrane as determined by the catalyst content.
Zelenay; Piotr (Los Alamos, NM), Davey; John (Los Alamos, NM), Ren; Xiaoming (Los Alamos, NM), Gottesfeld; Shimshon (Los Alamos, NM), Thomas; Sharon C. (Vancouver, CA)
The Regents of the University of California (Los Alamos, CA)
09/ 715,211
November 14, 2000
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.