Fuel cell membrane electrode and seal assembly

Details Fuel cell membrane electrode and seal assembly Fuel cell membrane electrode and seal assembly

1991-09-27

1994-02-08

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 39, 429 41, H01M 804, H01M 810

Patent

active

052847187

ABSTRACT:
A membrane electrode and seal assembly for an electrochemical fuel cell comprises first and second layers of porous electrically conductive sheet material, such as carbon fiber paper. The sheet material layers have a solid polymer ion exchange membrane interposed therebetween. The sheet material layers cover and support the membrane over substantially its entire surface area. The sheet material layers are coated with a catalyst to render them electrochemically active, and are bonded together with the membrane to form a consolidated assembly. Openings are formed in the layers of sheet material and the membrane to accommodate the passage of fluids through the assembly. Channels formed in the layers of sheet material generally circumscribe the openings and the electrochemically active region of the sheet material. Solid preformed gaskets are disposed in the channels. The gasketing technique can also be applied to the membrane and seal assemblies of the humidification portion of fuel cell stacks.

REFERENCES:
patent: 3681145 (1972-08-01), Kohlmuller et al.
patent: 4175165 (1979-11-01), Adlhart
patent: 4279970 (1981-07-01), Breault et al.
patent: 4804592 (1989-02-01), Vanderborgh
"Electrode Processes And Electrochemical Engineering", Fumio Hine, approx. 1987.

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