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US 7,842,433 B2Granted
Fuel cell separator plate and method for producing it
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshihiro Nakanishi, Yuichiro Kosaka, Kentaro Nagoshi
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Abstract
A fuel cell separator plate comprising a portion in contact with an electrode, and a sealing portion provided around the contact portion, the contact portion having a larger surface roughness (Rmax) than that of the sealing portion. It is preferably a molded separator plate made of a composite carbon material comprising carbon and a thermosetting resin.
Claims2
A solid polymer electrolyte fuel cell separator plate,
- wherein said separator plate comprises a portion in contact with an electrode, and a sealing portion in contact with a seal provided around said contact portion, said contact portion having a larger surface roughness (Rmax) than that of said sealing portion;
- wherein said contact portion has a surface roughness (Rmax) of 15-40 μm, and said sealing portion in contact with a seal in a form of a preformed sheet or a preformed O-ring made of an elastic material has a surface roughness (Rmax) of 5-10 μm;
- wherein the solid polymer electrolyte fuel cell separator plate is a molded separate plate made of a composite carbon material;
- and
- wherein said composite carbon material comprises carbon and a thermosetting resin;
- wherein the thermosetting resin is provided in said sealing portion.
3 more elements
Dependencies are inferred from the claim text.