Back to results
US 8,475,974 B2Granted
Membrane electrode assembly and fuel cell
AssigneeSanyo Electric Co., Ltd.
InventorsYuko Nowatari, Takahiro Isono
Life of this patent
Estimating the term…
Abstract
A membrane electrode assembly includes an electrolyte membrane, anode catalyst layers, and cathode catalyst layers provided counter to the anode catalyst layers, respectively. An insulating layer is provided on the electrolyte membrane between adjacent anode catalyst layers. An insulating layer is provided on the electrolyte membrane between adjacent cathode catalyst layers. The resistivity of the insulating layer is preferably identical to or higher than that of the electrolyte membrane.
Claims9
A membrane electrode assembly, comprising:
- an electrolyte membrane containing an ionomer;
- a plurality of first catalyst layers provided on one face of said electrolyte membrane;
- a plurality of second catalyst layers, provided on the other face of said electrolyte membrane, corresponding respectively to said plurality of first catalyst layer;
- and
- a first insulating layer provided on said electrolyte membrane between adjacent first catalyst layers, wherein:
- an end of said first insulating layer in an array direction of cells is disposed between said electrolyte membrane and said first catalyst layer,
- said first catalyst layer includes a first region positioned above the end of said first insulating layer in the array direction of cells and a second region in contact with said electrolyte membrane,
- the first region of said first catalyst layer includes a first ionomer, and the second region of said first catalyst layer includes a second ionomer, and
- the first ionomer included in the first region has a smaller number of C—F bonds than the second ionomer in the second region.
6 more elements
A membrane electrode assembly, comprising:
- an electrolyte membrane containing an ionomer;
- a plurality of first catalyst layers provided on one face of said electrolyte membrane;
- a plurality of second catalyst layers, provided on the other face of said electrolyte membrane, corresponding respectively to said plurality of first catalyst layer;
- and
- a first insulating layer provided on said electrolyte membrane between adjacent first catalyst layers;
- a second insulating layer provided on said electrolyte membrane between adjacent second catalyst layers, wherein:
- an end of said first insulating layer in an array direction of cells is disposed between said electrolyte membrane and said first catalyst layer,
- an end of said second insulating layer in an array direction of cells is disposed between said electrolyte membrane and said second catalyst layer,
- said second catalyst layer includes a first region positioned above the end of said second insulating layer in the array direction of cells and a second region in contact with said electrolyte membrane,
- the first region of said second catalyst layer includes a first ionomer, and the second region of said second catalyst layer includes a second ionomer, and
- the first ionomer included in the first region has a smaller number of C—F bonds than the second ionomer in the second region.
8 more elements
Dependencies are inferred from the claim text.