| US 7,553,574 B2 | ||
| Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell | ||
| Toru Koyama, Hitachi (Japan); Toshiyuki Kobayashi, Tokai (Japan); Kenji Yamaga, Hitachi (Japan); Tomoichi Kamo, Tokai (Japan); and Kazutoshi Higashiyama, Naka (Japan) | ||
| Assigned to Hitachi, Ltd, Tokyo (Japan) | ||
| Filed on Jul. 08, 2005, as Appl. No. 11/176,373. | ||
| Application 11/176373 is a continuation of application No. 10/641076, filed on Aug. 15, 2003, granted, now 6,964,823. | ||
| Application 10/641076 is a continuation of application No. 09/811746, filed on Mar. 20, 2001, granted, now 6,670,065, filed on Dec. 30, 2003. | ||
| Claims priority of application No. 2000-301100 (JP), filed on Sep. 29, 2000. | ||
| Prior Publication US 2005/0271922 A1, Dec. 08, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H01M 8/10 (2006.01); H01M 2/00 (2006.01) | ||
| U.S. Cl. 429—33 [429/34] | 2 Claims |
| 1. A solid polymer electrolyte fuel cell comprising:
a solid polymer electrolyte membrane;
an electrode unit comprising a cathode and an anode, which are placed one on each side of said polymer electrolyte membrane;
and
a pair of partition walls, which are provided to surround said electrode unit, and a pair of current collecting members, which
are placed between said electrode unit and said pair of partition walls, wherein:
said solid polymer electrolyte membrane contains a solid polymer electrolyte, which comprises a polymer compound having a
hydrocarbon aromatic group in the backbone thereof and including a side chain expressed by FORMULA 1:
CH2nSO3H FORMULA 1
wherein “n” is 1, 2, 3, 4, 5, or 6.
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