(DE19823880-A1)      The assembly has two electrode assemblies (30) with anode and cathode separated by an electrolyte. A bipolar plate (35) with an electrically conductive thermoplastic polymer substrate has two opposing major faces with a number of channels on each face. The bipolar plate is disposed between the two electrode assemblies such that one major face is adjacent and adhesively bonded to a major surface of one of the electrode assembly's anodes. The other major surface is adjacent and adhesively bonded to a major surface of the other electrode assembly.    Also claimed is a fuel cell assembly having n membrane electrode assemblies each with anode and cathode separated by a polymer electrolyte membrane. The assembly has n-1 bipolar plates each with a thermoplastic polymer substrate selected from polyethylene, polypropylene, polycarbonate, acrylonitrile-butadiene-styrene, polyetherimide, polyimide, polyamide, and polyacrylate. The substrates have two major opposing surfaces with fuel channels (37) formed on one face and oxidant channels (37) formed on the other. The substrate is rendered electrically conductive by filling it with a metal or carbon filler. The plates and electrode assemblies are assembled in a stack such that they alternate and are bonded together, the bonds serving to seal the fuel and oxidant channels.    ADVANTAGE -   The assembly eliminates the need for gaskets and other sealing devices, reducing size and cost.    (FR2764122-A1)      The assembly has two electrode assemblies (30) with anode and cathode separated by an electrolyte. A bipolar plate (35) with an electrically conductive thermoplastic polymer substrate has two opposing major faces with a number of channels on each face. The bipolar plate is disposed between the two electrode assemblies such that one major face is adjacent and adhesively bonded to a major surface of one of the electrode assembly's anodes. The other major surface is adjacent and adhesively bonded to a major surface of the other electrode assembly.    Also claimed is a fuel cell assembly having n membrane electrode assemblies each with anode and cathode separated by a polymer electrolyte membrane. The assembly has n-1 bipolar plates each with a thermoplastic polymer substrate selected from polyethylene, polypropylene, polycarbonate, acrylonitrile-butadiene-styrene, polyetherimide, polyimide, polyamide, and polyacrylate. The substrates have two major opposing surfaces with fuel channels (37) formed on one face and oxidant channels (37) formed on the other. The substrate is rendered electrically conductive by filling it with a metal or carbon filler. The plates and electrode assemblies are assembled in a stack such that they alternate and are bonded together, the bonds serving to seal the fuel and oxidant channels.    ADVANTAGE -   The assembly eliminates the need for gaskets and other sealing devices, reducing size and cost.