Solid oxide fuel cell and porous electrode for use in the same
AssigneeNGK Insulators, Ltd.
InventorsTakeshi Ishihara, Tadashi Fujita, Hidenobu Misawa
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Abstract
A solid oxide fuel cell includes a one end-closed cylindrical porous air electrode tube, a solid electrolyte film provided on the outer periphery of the air electrode tube, and a fuel electrode film provided on the outer surface of the solid electrolyte film. A fuel gas is caused to flow around the outer periphery of the fuel electrode film, and an oxidizing gas is supplied into the inner space of the cylindrical air electrode tube to generate electric power. The pore diameter of that portion of the porous air electrode which is in contact with the solid electrolyte film is smaller than that of the surface portion of the porous air electrode on the side opposite to the interface.
Claims18
A solid oxide fuel cell including a solid electrolyte film having ion conductivity and a porous electrode joined to the solid electrolyte film, wherein a pore diameter of that portion of said porous electrode which is in contact with the solid electrolyte film at an interface therebetween is smaller than that of the surface portion of the porous electrode which is located on the side opposite to the interface.
A porous electrode for a solid oxide fuel cell, said porous electrode having one surface on which a solid electrolyte film having an ionic conductivity is to be formed, wherein a pore diameter of the porous electrode on the side of said one surface is smaller than that of the porous electrode on the other surface.
Dependencies are inferred from the claim text.