摘要:
A gas diffusion layer comprises a porous material and an electrically conductive material coating at least a portion of an external surface of the porous material, wherein the electrically conductive material comprises at least one inherently conductive polymer. When placed adjacent to or in contact with a cathode of a polymer electrolyte or proton exchange membrane (PEM) fuel cell, the gas diffusion layer helps deliver oxygen to the cathode. The gas diffusion layer may be placed adjacent to or in contact with an anode of a PEM fuel cell to help deliver hydrogen to the anode.
摘要:
A fuel delivery system for a liquid fuel cell particularly useful for portable electronic devices includes (a) a container defining a volume for holding a liquid fuel; (b) a reservoir structure positioned within the volume and into which at least a portion of the liquid fuel wicks and from which said liquid fuel subsequently may be metered, such as by pumping. The reservoir structure is formed from a material with a free rise wick height greater than at least one half of the longest dimension of the reservoir structure. Among materials with such wicking capability are foams, bundled fibers and nonwoven fibers, including particularly felted and unfelted reticulated polyurethane foams. The container may have a generally flat and thin profile, formed as a pouch or envelope with substantially planar top and bottom faces of flexible film material, such that the container holding the reservoir structure and filled with liquid fuel can be bent or shaped.