Fuel cell and flow field plate for the same

H - Electricity – 01 – M

Patent

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H01M 8/02 (2006.01)

Patent

CA 2664991

A fuel cell comprising an anode electrode, a cathode electrode, and a polymer electrolyte membrane interposed therebetween; an anode flow field adjacent the anode electrode; and a cathode flow field adjacent the cathode; wherein the anode flow field comprises a single serpentine anode flow channel with at least one anode channel pass and at least one anode landing on a first surface, and the cathode flow field comprises at least one serpentine cathode flow channel with a plurality of cathode channel passes and cathode landings on a first surface, wherein each anode channel pass aligns and overlaps with an alternating cathode channel pass, and the pitch of the anode flow field is at least twice the pitch of the cathode flow field.

La présente invention concerne une pile à combustible qui comprend une électrode d'anode, une électrode de cathode ainsi qu'une membrane électrolyte polymère intercalée entre les deux, un champ de flux d'anode adjacent à l'électrode d'anode et un champ de flux de cathode adjacent à la cathode, sachant que le champ de flux d'anode comprend un canal unique de flux d'anode en serpentin avec au moins une passe de canal d'anode et au moins un palier d'anode sur une première surface et que le champ de flux de cathode comprend au moins un canal de flux de cathode en serpentin avec une pluralité de passes de canal de cathode et de paliers de cathodes sur une première surface, sachant que chaque passe de canal d'anode s'aligne à une passe de canal de cathode en alternance et s'y superpose et que le pas du champ de flux d'anode est d'une valeur d'au moins deux fois le pas du champ de flux de cathode.

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