Electrochemical fuel cell membrane electrode assembly with porou

Details Electrochemical fuel cell membrane electrode assembly with porou Electrochemical fuel cell membrane electrode assembly with porou

1998-12-21

2000-05-09

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 42, 429 44, 296231, 502101, H01M 486, H01M 488

Patent

active

060601906

ABSTRACT:
A membrane electrode assembly for an electrochemical fuel cell includes a pair of electrodes and an ion exchange membrane interposed therebetween. At least one of the electrodes comprises a porous electrode substrate. The substrate comprises a preformed macroporous web having a through-plane resistivity of greater than 1 .OMEGA.*cm. The web contains an electrically conductive filler. A method for preparing the membrane electrode assembly includes the steps of (a) forming a porous electrode substrate for an electrochemical fuel cell by filling a preformed macroporous web, the web having a through-plane resistivity of greater than 1 .OMEGA.*cm, with an electrically conductive filler and (b) consolidating the electrode pair and ion exchange membrane to form a unitary assembly.

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Zoltek Corporation, Product Data Sheet PAEX 30, Low Oxidation Carbon Fabrics, Feb. 23, 1996.

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