Fuel cell separator

Details Fuel cell separator Fuel cell separator

2006-04-25

2006-04-25

Barr, Michael (Department: 1746)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C429S006000

Reexamination Certificate

active

07033692

ABSTRACT:
According to the invention, in a separator molded member (4A) for a fuel cell which is produced by: loading a complex compound that is configured by bonding graphite powder by means of a thermosetting resin, into a mold (14); and forming ribs (11) for forming gas passages by the resin molding process, the surfaces of the ribs (11) are alkali-treated by, for example, etching by using an alkaline solution, and graphite particles (14) which are flat and soft are exposed from the top surfaces of the ribs (11) which function as a contact surface with an electrode in the separator molded member (4A), and resin defective portions (15) are formed between adjacent graphite particles (14), whereby the contact area with an electrode is enlarged, so that the performance and efficiency of the fuel cell can be improved by remarkable lowering of the contact resistance.

REFERENCES:
patent: 2002/0004156 (2002-01-01), Mizuno
patent: H4-305083 (1992-10-01), None
patent: H8-180892 (1996-07-01), None
patent: H11-204120 (1999-07-01), None
patent: H11-297338 (1999-10-01), None
patent: 2000-285931 (2000-10-01), None

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