SEAL FOR FUEL CELL

摘要

A membrane electrode assembly comprises an edge seal member, the edge seal member having a first compressive surface and an opposing second compressive surface wherein the first compressive surface comprises a seal protrusion and the opposing second compressive comprises an inner and outer seal protrusion. The seal protrusion on the first compressive surface is positioned asymmetrically in relation to the inner and outer seal protrusions on the second compressive surface such that the centerline of the seal protrusion on the first compressive surface is positioned between the centerline of the inner seal protrusion and the centerline of the outer seal protrusion on the second compressive surface. The seal protrusions may be shaped such that the base is wide and narrows toward a contacting end thereof, wherein the contacting end is in contact with a surface of a flow field plate. The geometry and positions of the seal protrusions can be adjusted to optimize the contact pressure on the edge seal member and contacting points thereof.