| US 7,601,454 B2 | ||
| Polymer electrolyte fuel cell | ||
| Ryoichiro Takahashi, Wako (Japan); Chikara Iwasawa, Wako (Japan); Masahiro Ise, Wako (Japan); Yoichi Asano, Wako (Japan); Hideki Watanabe, Sayama (Japan); Atsuhito Yoshizawa, Sayama (Japan); Takashi Suzuki, Sayama (Japan); and Osamu Kakutani, Sayama (Japan) | ||
| Assigned to Honda Motor Co. Ltd., Tokyo (Japan) | ||
| Filed on Mar. 09, 2005, as Appl. No. 11/74,931. | ||
| Claims priority of application No. 2004-069533 (JP), filed on Mar. 11, 2004. | ||
| Prior Publication US 2005/0202308 A1, Sep. 15, 2005 | ||
| Int. Cl. H01M 4/96 (2006.01) | ||
| U.S. Cl. 429—42 [429/44] | 6 Claims |
| 1. A polymer electrolyte fuel cell comprising:
a cathode diffusion layer,
a cathode electrode catalyst layer,
a polymer electrolyte membrane,
an anode electrode catalyst layer,
an anode diffusion layer, and
carbon whiskers positioned in a portion of the cathode electrode catalyst layer on the side of the cathode diffusion layer
and positioned in a portion of the anode electrode catalyst layer on the side of the anode diffusion layer,
wherein electron conductivity of the cathode electrode catalyst layer at a portion on the side of the cathode diffusion layer
is higher than at a portion on the side of the polymer electrolyte membrane and electron conductivity of cathode electrode
catalyst layer at the portion on the side of the polymer electrolyte membrane is lower than at the portion on the side of
the cathode diffusion layer, and
wherein electron conductivity of the anode electrode catalyst layer at a portion on the side of the anode diffusion layer
is higher than at a portion on the side of the polymer electrolyte membrane and electron conductivity of anode electrode catalyst
layer at the portion on the side of the polymer electrolyte membrane is lower than at the portion on the side of the anode
diffusion layer.
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