| US 7,579,104 B2 | ||
| Method of preserving fuel cell membrane electrode assembly | ||
| Takashi Nakagawa, Moriguchi (Japan); Masatoshi Teranishi, Settsu (Japan); and Yoichiro Tsuji, Katano (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/980,604. | ||
| Application 11/980604 is a division of application No. 11/071468, filed on Mar. 04, 2005, granted, now 7,364,815. | ||
| Claims priority of application No. 2004-065196 (JP), filed on Mar. 09, 2004; and application No. 2004-245566 (JP), filed on Aug. 25, 2004. | ||
| Prior Publication US 2008/0069726 A1, Mar. 20, 2008 | ||
| Int. Cl. H01M 8/02 (2006.01); H01M 8/10 (2006.01) | ||
| U.S. Cl. 429—48 [429/30] | 3 Claims |
| 1. A method of preserving a fuel cell membrane electrode assembly in which a catalyst electrode is arranged on each surface
of a polymer electrolyte in a layered manner, the method comprising:
covering the membrane electrode assembly with a flexible polymeric film with moisture permeability of 0.1 g/m2/day or less and oxygen permeability of 0.1 cc/m2/day/atm or less;
providing a space around a portion of the polymer electrolyte, which projects beyond the catalyst electrode; and
filling the space with inert gas.
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