Patent ID: 9023556
Filing Date: 2015-05-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A method of preparing diffusion media, the method consisting essentially of: preparing an aqueous dispersion comprising: forming a layer of the aqueous dispersion on a support; removing water from the layer to form a fiber layer; during or after removing water, heating the fiber layer to at least partially cure the powder resin to a partial degree of polymerization; after heating, compression molding the fiber layer with heat under pressure to fully cure the powder resin to a full degree of polymerization that is greater than the partial degree of polymerization and form a pressure-molded layer, wherein compression molding includes welding the plurality of carbon fibers, the plurality of graphite fibers, or combinations thereof to one another without flowing the powder resin through the fiber layer; after compression molding, optionally post-curing the powder resin to ensure full crosslinking of the powder resin; and after compression molding, carbonizing or graphitizing the pressure-molded layer.