Solid polymer fuel cell-purpose electrolyte membrane, production method therefor, and membrane-electrode assembly
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroshi Suzuki, Yoshitaka Kino
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Abstract
In an electrolyte membrane (10) for a solid polymer fuel cell, sealing ribs (12) of a predetermined height made of an electrolyte resin is formed integrally with the electrolyte membrane (10). Using the electrolyte membrane, a membrane-electrode assembly (20) is formed, which is further processed into a fuel cell (30). Thus, an electrolyte membrane and a membrane-electrode assembly which are capable of improving the sealing characteristic when incorporated into a fuel cell are obtained. Besides, a fuel cell improved in the sealing characteristic is obtained.
Claims5
A method of producing a solid polymer fuel cell-purpose elongated-shape electrolyte membrane that has sealing ribs of a predetermined height made of an electrolyte resin which are formed integrally with the electrolyte membrane, comprising:
- forming the sealing ribs of the predetermined height made of the electrolyte resin integrally with the elongated-shape electrolyte membrane near two side edges of the elongated-shape electrolyte membrane by using a die having, near two side edges of a resin ejection opening, recessed grooves whose depth corresponds to the height of the sealing ribs, and extruding the electrolyte resin from the resin ejection opening of the die, and extruding the electrolyte resin from the resin ejection opening of the die to form an electrolyte membrane main body.
Dependencies are inferred from the claim text.