Ford Motor Company Limited

Daimler Ag

Mike Davis

Herwig Haas

Hao Zhang

Richard Fellows

Scott McDermid

Carmen Chuy

Andrew Leow

Rajeev Vohra

Use of noble metal alloy catalysts, such as PtCo, as the cathode catalyst in solid polymer electrolyte fuel cells can provide enhanced performance at low current densities over that obtained from the noble metal itself. Unfortunately, the performance at high current densities has been relatively poor. However, using a specific bilayer cathode construction, in which a noble metal/non-noble metal alloy layer is located adjacent the cathode gas diffusion layer and a noble metal layer is located adjacent the membrane electrolyte, can provide superior performance at all current densities.

Bilayer cathode catalyst structure for solid polymer electrolyte fuel cell

Ruthenium or a Ruthenium compound is applied to an anode structure according to a predetermined pattern, with only part of the anode active area containing Ru. The parts of the MEA that do not contain Ru are not expected to suffer degradation from Ru cross-over, so that overall degradation of the cell will be diminished. Having less precious metals will also translate into less cost.

Reversal tolerant membrane electrode assembly for a fuel cell

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Coquitlam, Canada

Mike Davis