Patent ID: 9005844
Filing Date: 2015-04-14
Classification: H01M,Y02E

Abstract:
1. A structure of a fuel cell comprising: a planar porous support substrate having a gas flow channel formed therein; a plurality of power-generating elements provided on a main surface of the planar support substrate at a plurality of positions, respectively, located apart from one another, each of the power-generating elements being a laminate of at least an inner electrode, a solid electrolyte, and an outer electrode; and a single or a plurality of electrical connections provided between a pair of or pairs of adjacent power-generating elements and adapted to electrically connect the inner electrode of one of the adjacent power-generating elements and the outer electrode of the other one of the adjacent power-generating elements; wherein the inner electrodes and the outer electrodes are fuel electrodes and air electrodes, respectively, wherein each of the fuel electrodes comprises a fuel-electrode active portion in contact with the solid electrolyte, and a remaining fuel-electrode current-collecting portion, wherein substance having oxygen ion conductivity in the fuel-electrode active portion has a volume ratio that is higher than a substance having oxygen ion conductivity in the fuel-electrode current-collecting portion, wherein the fuel-electrode current-collecting portions are embedded in recesses are formed on the main surface of the planar support substrate at the plurality of positions, respectively, each of the recesses having a bottom wall formed of a material of the support substrate and a circumferentially closed side wall formed entirely of the material of the support substrate, and wherein the fuel-electrode active portions are embedded in a recess formed on an upper surface of the fuel-electrode current-collecting portions so that the inner electrodes of the power-generating elements are embedded in the respective recesses.