| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce total contact resistance while securing corrosion resistance of a metal base material constituting a separator in a solid polymer fuel cell stack. <P>SOLUTION: A method for manufacturing the solid polymer fuel cell stack comprises using, as a base material, stainless steel having a roughened surface with a surface area not less than twice the projection area and with a surface roughness SRa of 2 μm or less, arranging MEAs (membrane electrode assemblies) and separators alternately on the roughened surface of the base material to form a laminated structure, using the separators having conductive coating films with an average thickness of 3-50 μm formed by solidifying conductive carbon particles with thermosetting resin. The laminated structure is fixed so that the average surface pressure at a contact part between the electrode surface of the MEA and the conductive coating film surface of the separator is 0.5-5 MPa, and then in the fixed state, heat treatment is applied so that the conductive coating film of each separator is held for 10 minutes or longer at 90-200°C. <P>COPYRIGHT: (C)2010,JPO&INPIT |
