FOUR-FLUID BIPOLAR PLATE FOR FUEL CELL

A four-fluid bipolar plate for a fuel cell includes a nonporous sub-plate and a porous sub-plate. The nonporous sub-plate includes a water management side, an opposing reactant side, and an internal coolant passage therebetween. The water management side includes a recessed region over an area approximately equal to the active area, and the porous sub-plate is nested and sealed in the recessed region. The porous sub-plate includes a reactant side and an opposing water management side. The water management side is in fluid communication with the water management side of the nonporous sub-plate.