MEMBRANE ELECTRODE ASSEMBLY AND SOLID POLYMER FUEL CELL

WIPO Patent Application WO/2008/032802

A1

A membrane electrode assembly characterized in that at least either the catalyst layer of oxygen electrode or the catalyst layer of fuel electrode contains a support bearing a catalytic metal doped with a platinum group element and contains a proton conductive polymer electrolyte and further contains at least one member selected from among (a) complex forming agent having a ligand capable of coordination with an ion of the platinum group element to thereby form a complex, the ligand containing oxygen as a coordinating atom, (b) complex of the platinum group element having a ligand containing oxygen as a coordinating atom and (c) carbon of 100 m2/g or greater BET specific surface area satisfying at least either the requirement (i) of Raman spectrum R-value of 0.5 or less or the requirement (ii) of (002) face plane spacing d002 of 0.35 nm or less, the carbon not bearing the catalytic metal. By the use of this membrane electrode assembly, there can be provided a solid polymer fuel cell of high durability and prolonged life duration.

UGAWA KOHEI
KASHINO HIROSHI
YOSHIMOTO NORIHISA
SAIBARA SHOJI

PCT/JP2007/067882

March 20, 2008

September 13, 2007

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HITACHI MAXELL (JP)
UGAWA KOHEI
KASHINO HIROSHI
YOSHIMOTO NORIHISA
SAIBARA SHOJI

H01M4/86; H01M4/90; H01M4/92; H01M4/96; H01M8/10

WO2001092151A1

2001-12-06

JP2002329500A	2002-11-15
JP2005332807A	2005-12-02
JP2006147345A	2006-06-08
JP2005026207A	2005-01-27
JP2000030715A	2000-01-28
JP2000273351A	2000-10-03
JP2003109643A	2003-04-11
JP2003086188A	2003-03-20

IKEUCHI SATO & PARTNER PATENT ATTORNEYS (OAP TOWER 8-30, Tenmabashi 1-chome, Kita-ku, Osaka-sh, Osaka 26, JP)

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