Membrane electrode assembly and fuel cell using the same

Details Membrane electrode assembly and fuel cell using the same Membrane electrode assembly and fuel cell using the same

2011-08-23

2011-08-23

Ryan, Patrick (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Fuel cell with solid electrolyte

C429S483000, C429S491000, C429S492000

Reexamination Certificate

active

08003276

ABSTRACT:
A membrane electrode assembly for a fuel cell of the present invention includes an electrolyte membrane (100); and a pair of electrode catalyst layers (110) provided on both surfaces of the electrolyte membrane. Furthermore, in the present invention, a plurality of hydrophilic groups exist along a substantially continuous concentration gradient from a surface of one of the electrode catalyst layers opposite to a surface thereof in contact with the electrolyte membrane to a surface of the other electrode catalyst layer opposite to a surface thereof in contact with the electrolyte membrane in a thickness direction of the electrolyte membrane (100) and the electrode catalyst layers (110). This makes it possible to provide a membrane electrode assembly with water management performed not only in the surfaces but also in the entire assembly in the thickness direction.

REFERENCES:
patent: 5607785 (1997-03-01), Tazawa et al.
patent: 2002/0001744 (2002-01-01), Tsusaka et al.
patent: 2005/0233183 (2005-10-01), Hampden-Smith et al.
patent: 10-106593 (1998-04-01), None
patent: 2001-248864 (2001-09-01), None
patent: 2001-319663 (2001-11-01), None
patent: 2002-203569 (2002-07-01), None
patent: 2006-172949 (2006-06-01), None

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