Patent ID: 7919213
Filing Date: 2011-04-05
Classification: H01M,Y02E

Abstract:
1. A bipolar plate for a fuel cell, the bipolar plate comprising in combination: a mass of thin planar composite material having a first side opposite a second side; said first side having a plurality of recesses provided to have a hydrogen containing fuel cell reactant pass therethrough; said second side having a plurality of recesses provided to have an oxygen containing fuel cell reactant pass therethrough; said mass of composite material formed of a mixture of at least thirty percent carbon and up to about seventy percent resin; said resin adapted to have a liquid state and a solid state, with said resin and said carbon exhibiting a flowable form capable of flowing into a mold when said resin is in a liquid state and said carbon is mixed homogeneously with said resin; wherein said resin includes a polyester resin in styrene; wherein said mass of composite material includes a plasticizer; wherein said mass of composite material includes polytetrafluoroethylene; wherein said mass of composite material includes methylethylketone; wherein said mass of composite material includes organic peroxide methylethylketone as a catalyst; and wherein said mass of composite material includes between twenty and forty percent polyester resin in styrene, up to five percent plasticizer, up to five percent cobalt carboxylate in a solution of less than ten percent cobalt, up to five percent polytetrafluoroethylene, between thirty percent and ninety percent carbon, with a majority of said carbon in the form of graphite, up to five percent methylethylketone and up to five percent organic peroxide methylethylketone.