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A method for making an electrochemical cell electrode involves depositing a layer of dry carbon/hydrophobic polymer floc powder on the surface of a substrate by dispersing the powder as a cloud in a chamber over the substrate and pulling the powder onto the substrate by drawing a vacuum under the su

A method for making an electrochemical cell electrode involves depositing a layer of dry carbon/hydrophobic polymer floc powder on the surface of a substrate by dispersing the powder as a cloud in a chamber over the substrate and pulling the powder onto the substrate by drawing a vacuum under the substrate. The electrode is subsequently compacted and sintered. Typically the carbon component of the floc is catalyzed, such as with platinum. Thus, the method is for applying a catalyst layer on an electrode substrate. The method is particularly adapted to the high speed manufacture of electrodes.

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A method for making an electrochemical cell electrode comprising the steps of: applying a uniform layer of dry, powdered, carbon/hydrophobic polymer floc on the surface of a porous electrode substrate with virtually no floc within the pores of the substrate by positioning the substrate under a chamb

A method for making an electrochemical cell electrode comprising the steps of: applying a uniform layer of dry, powdered, carbon/hydrophobic polymer floc on the surface of a porous electrode substrate with virtually no floc within the pores of the substrate by positioning the substrate under a chamber having a bottom edge wherein the said bottom edge of the chamber fits against the edge of the substrate, dispersing the floc as a cloud of powder in the chamber over said surface of said positioned substrate and pulling the floc onto said surface by drawing a continuous vacuum under the substrate until the desired amount of powder has been deposited, wherein said substrate is graphitized carbon paper made from carbon fibers; compacting the applied floc layer; and, sintering the compacted layer.