Fuel cell electrode and method for manufacturing membrane-electrode assembly using the same
AssigneeHyundai Motor Company
InventorJae Seung Lee
Life of this patent
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Abstract
The present invention provides a fuel cell electrode, and a method for manufacturing a membrane-electrode assembly (MEA) using the same. The fuel cell electrode is formed by adding carbon nanotubes to reinforce the mechanical strength of the electrode, cerium-zirconium oxide particles to prevent corrosion of a polymer electrolyte membrane, and an alloy catalyst prepared by alloying a second metal (such as Ir, Pd, Cu, Co, Cr, Ni, Mn, Mo, Au, Ag, V, etc.) with platinum to prevent the dissolution, migration, and agglomeration of platinum.
Claims7
1-19. (canceled)
A method of producing a fuel cell electrode comprising:
- preparing a binary alloy catalyst by combining platinum and a second metal on a carbon support, and
- mixing the binary alloy catalyst with cerium-zirconium oxide particles having a size of 1 to 100 nm, thereby producing a fuel cell electrode.
21-24. (canceled)
A method for manufacturing a membrane-electrode assembly:
- preparing a catalyst slurry by mixing the fuel cell electrode of claim 1 with a solvent and a polymer electrolyte solution;
- coating the catalyst slurry on a release paper to form an electrode;
- drying the electrode;
- and
- bonding the dried electrode to a polymer electrolyte membrane by thermal compression.
26-27. (canceled)
A method of manufacturing a fuel cell cathode comprising platinum, cerium and zirconium oxide particles, particles of a second metal, and at least one carbon support, which form a quaternary alloy catalyst, wherein the quaternary alloy catalyst is prepared by supporting cerium-zirconium oxide particles having a size of about 1 to about 100 nm on the at least carbon support and supporting the platinum and the second metal having a size of about 1 to about 100 nm on the at least one carbon support.
A method of manufacturing a fuel cell cathode comprising:
- platinum,
- cerium oxide particles having a size of between about 1 nm and about 100 nm,
- zirconium oxide particles having a size of between about 1 nm and about 100 nm, particles of a second metal having a size of between about 1 nm and about 100 nm, at least one carbon support, and
- a polymer electrolyte solution,
- wherein the amount of cerium oxide particles is between about 0.1 and about 5 parts by weight relative to 100 parts by weight of platinum, the amount of zirconium oxide particles is between about 0.1 and about 5 parts by weight relative to 100 parts by weight of platinum, the amount of the particles of the second metal is between about 1 and about 50 parts by weight of the second metal relative to 100 parts by weight of platinum, the amount of the at least one carbon support is between about 10 and about 2,000 parts by weight relative to 100 parts by weight of platinum, and the amount of the polymer electrolyte solution is between about 50 and about 500 parts by weight with respect to 100 parts by weight of platinum,
- wherein the fuel cell cathode is formed by preparing an alloy catalyst by supporting the platinum and the second metal on carbon supported with the cerium-zirconium oxide particles, and mixing the alloy catalyst with carbon nanofibers and the polymer electrolyte solution.
Dependencies are inferred from the claim text.