An improved membrane electrode assembly for an...

Details An improved membrane electrode assembly for an... An improved membrane electrode assembly for an...

H - Electricity

01

M

H01M 4/94 (2006.01) H01M 4/88 (2006.01) H01M 8/02 (2006.01) H01M 8/24 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2428912

An improved membrane electrode assembly "MEA") for an electrochemical fuel cell comprises coextensive ion exchange membrane and electrode layers and a rigid fluid impermeable integral seal comprising a sealant material impregnated into the porous electrode layers in sealing regions of the MEA. The integral seal envelops the peripheral region including the side edge of the MEA. The integral seal can circumscribe the electrochemically active area of the MEA and can also extend laterally beyond the edge of the MEA. An integral seal can also be provided around any openings, such as manifold openings, than are formed inside or outside the MEA. The seal has sealing features formed therein, such as raised ribs. Sealing features can be formed from the rigid sealant material or from resilient sealant material applied to the surface of the integral seal.

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