Fabrication of gas impervious edge seal for a bipolar gas distribution assembly for use in a fuel cell
A process is described for the preparation of a bipolar gas reactant distribution assembly having solid, gas impervious edge seals to prevent leakage of gaseous reactants, which comprises providing a pair of porous plate members provided with peripheral slits, the slits being generally parallel to, and spaced from each of two edges of the plate, filling the slits with a non-porous, fusible gas impervious edge sealing compound, assembling the plate members with the slits therein approximately perpendicular to one another and a layer of fusible sealing material interposed therebetween, hot pressing the assembly at a temperature sufficient to cause a redistribution of the sealant layer into the pores of the adjacent plate surfaces and the edge sealing compound to flow and impregnate the region of the plates adjacent the slits and comingle with the redistributed sealant material to form a continuous layer of sealant along the edges of the assembly.
- Assignee:
- Engelhard Corp., Menlo Park, NJ
- Patent Number(s):
- US 4588661
- OSTI ID:
- 5704813
- Resource Relation:
- Patent File Date: Filed date 27 Aug 1984
- Country of Publication:
- United States
- Language:
- English
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