Gas Diffusion Method For Use With Fuel Cell Stack

Abstract: Aspects of managing fluid diffusion across active regions of one or more of a cathode and anode are disclosed herein, aspects include a method of efficient fluid distribution within an MEA (20) by forming a fluid confinement space with a sealing gasket (50) forming placed on at least one of an anode and a cathode of a fuel cell the gasket configured with at least one inlet (140) fluidly communicating with the fluid containment space and at least one outlet (145) through the gasket (50) fluidly communicating with the fluid containment space, inserting a generally planar rectangular porous gas diffusion layer (40) with two end walls, and two side walls, configured to fit form at least one inlet plenum (186) is formed around at least one edge of the gas diffusion layer (40) and an annular wall of the fluid confinement space and one outlet plenum (188) and, the resistance to fluid flow along the inlet plenum (186) is balanced against the resistance to fluid flow across the gas diffusion insert configured to urge fluid transport generally evenly across the width of the insert to the outlet plenum (188) configured to fluidly connect to the outlet (145).

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