| US 7,482,089 B2 | ||
| Fuel cell | ||
| Tomohide Shibutani, Sayama (Japan); and Osamu Kakutani, Sayama (Japan) | ||
| Assigned to Honda Motor Co., Ltd., Tokyo (Japan) | ||
| Appl. No. 10/544,978 PCT Filed Mar. 02, 2004, PCT No. PCT/JP2004/002562 § 371(c)(1), (2), (4) Date Aug. 09, 2005, PCT Pub. No. WO2004/082048, PCT Pub. Date Sep. 23, 2004. |
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| Claims priority of application No. 2003-063173 (JP), filed on Mar. 10, 2003. | ||
| Prior Publication US 2006/0141337 A1, Jun. 29, 2006 | ||
| Int. Cl. H01M 4/86 (2006.01); H01M 8/10 (2006.01) | ||
| U.S. Cl. 429—42 [429/40; 429/30] | 2 Claims |
| 1. A fuel cell comprising:
an electrolyte membrane disposed to have a thickness directed horizontally and having front and rear sides;
positive and negative electrodes respectively disposed from a horizontal direction on the front and rear sides of the electrolyte
membrane and having upper parts and lower parts;
a positive electrode diffusion layer disposed on the positive electrode;
a negative electrode diffusion layer disposed on the negative electrode;
an oxygen gas passage provided on an outer face of the positive electrode diffusion layer; and
a hydrogen gas passage provided on an outer face of the negative electrode diffusion layer,
the positive electrode including an electrolyte, carbon, a catalyst carried on the carbon, a pore-forming material and a water-repellent
resin,
such that to electrolyte/carbon weight ratio, and an amount of the carried catalyst included in the positive electrode decrease
from an electrolyte membrane side in the direction of the positive electrode diffusion layer, decrease from the top part of
the positive electrode in the direction of the bottom part, and decrease from a supply side of the oxygen gas passage toward
a discharge side, and
an amount of the pore-forming material and an amount of the water-repellent resin included in the positive electrode increase
from the electrolyte membrane side in the direction of the positive electrode diffusion layer, increase from the top part
of the positive electrode in the direction of the bottom part, and increase from the supply side of the oxygen gas passage
toward the discharge side.
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