Solid polymer electrolyte fuel cell

Details Solid polymer electrolyte fuel cell Solid polymer electrolyte fuel cell

2007-09-25

2007-09-25

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C202S183000, C062S495000, C062S183000, C062S181000, C062S478000

Reexamination Certificate

active

10386470

ABSTRACT:
The present invention provides a solid polymer electrolyte fuel cell comprising a fuel cell stack21formed by laminating a plurality of fuel cell units each of which includes a fuel electrode23, an oxidant electrode24, and a solid polymer electrolyte membrane22interposed between the fuel and oxidant electrodes. The fuel cell unit is operable to generate an electric power through an electrochemical reaction between a first gas supplied to the side of the fuel electrode23and a second gas supplied to the side of the oxidant electrode24. In this fuel cell, the first gas supplied to the side of the fuel electrode23and the second gas supplied to the side of the oxidant electrode24are adapted to flow generally in opposite directions in the fuel cell stack21, so that a water created on the side of oxidant electrode24is reciprocally moved between the fuel electrode23and the oxidant electrode24to increase a water holding region in the solid polymer electrolyte membrane22. The fuel cell of the present invention can improve fuel cell characteristics without providing any humidifier.

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