Method and device for limiting crossover in fuel cell systems

Details Method and device for limiting crossover in fuel cell systems Method and device for limiting crossover in fuel cell systems

2007-10-16

2007-10-16

Ryan, Patrick (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000

Reexamination Certificate

active

10256892

ABSTRACT:
A method of and fuel cell system for limiting an amount of a fuel crossing over a membrane in a fuel cell, the method including determining an appropriate molecular ratio of the fuel and water for a fuel-water mixture503; and controlling an amount of the fuel-water mixture that is available to an anode side of the membrane507in the fuel cell according to an amount of the fuel that will be electro-oxidized by the fuel cell. The fuel cell system includes a fuel cell membrane103having an anode layer107, a cathode layer109, and an electrolyte layer111where the cathode layer is exposed to an oxygen source, and a fuel delivery system105including a fuel chamber119disposed around and proximate to the anode layer at a side opposite to the electrolyte layer, the fuel delivery system implementing the method above.

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