Fuel cell electrode assembly with hydrophobic polymer loading

Details Fuel cell electrode assembly with hydrophobic polymer loading Fuel cell electrode assembly with hydrophobic polymer loading

H - Electricity

01

M

H01M 4/94 (2006.01)

Patent

CA 2052221

A hydrophobic porous electrically conductive material comprises a porous electrically conductive sheet material and a hydrophobic polymer, such as polytetra-fluoroethylene, impregnated in the sheet material. The ratio of the hydrophobic polymer to the sheet material is in the range of about 2% to about 14% by weight and preferably about 4% to about 8% by weight. The most preferred value is about 6% of polytetrafluoroethylene to carbon sheet material by weight. In another embodiment, the polytetrafluoroethylene loading on the electrode acting as an anode is at least about two times higher than for the cathode.

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