Solid oxide fuel cell and inter-connector

摘要

A solid oxide fuel cell includes a fuel cell body and an inter-connector. The inter-connector has a base portion and a plurality of projecting portions projecting from the base portion toward the fuel cell body and electrically connected to the fuel cell body, and is integrally formed from a metallic material. Each of the projecting portions has a contour composed of a pair of linear portions which are disposed parallel to each other and each of which includes a straight line, and a pair of curved portions which connect opposite ends of the linear portions.

主权项

1. A solid oxide fuel cell comprising:
a fuel cell body which has a cathode layer, a solid electrolyte layer formed of an oxide, and an anode layer and which has a power generation function; and an inter-connector which has a base portion and a plurality of projecting portions projecting from the base portion toward the fuel cell body and electrically connected to the fuel cell body and which is integrally formed from a metallic material, wherein each of the projecting portions has a contour composed of a pair of linear portions which are disposed parallel to each other and each of which includes a straight line, and a pair of curved portions which connect opposite ends of the linear portions; a cross section of each projecting portion taken along a straight line connecting the centers of the pair of linear portions and perpendicular to the pair of linear portions has a first region whose radius of curvature is 1 to 70 mm, a pair of second regions whose first ends are connected to opposite ends of the first region and whose radius of curvature is 0.1 to 0.5 mm, and a pair of third regions which connect second ends of the second regions to the base portion; and a cross section of each of the projecting portions taken along a straight line connecting the centers of the pair of curved portions, parallel to the pair of linear portions, and located at the middle between the pair of linear portions, and being perpendicular to a plane on which the pair of linear portions are present, has a region whose radius of curvature is 70 mm to 500 mm.