Patent ID: 8968962
Filing Date: 2015-03-03
Classification: H01M,Y02E,Y10T

Abstract:
1. A solid oxide fuel cell comprising: a single or a plurality of sheet bodies including a solid electrolyte layer, a fuel electrode layer formed on the upper surface of the solid electrolyte layer, and an air electrode layer formed on the lower surface of the solid electrolyte layer, these layers being stacked and fired; and a plurality of support members for supporting the single or the plurality of sheet bodies, wherein the sheet bodies and the support members are stacked in alternating layers, wherein for each sheet body, an upper surface of a perimetric portion of the fuel electrode layer of the sheet body and a lower surface of a perimetric portion of an upper support member, which is the support member adjacent to the upper side of the sheet body, as well as a lower surface of a perimetric portion of the air electrode layer of the sheet body and an upper surface of the perimetric portion of a lower support member, which is the support member adjacent to the lower side of the sheet body, are respectively sealed through an interposed seal material so that the upper surface of the perimetric portion of the fuel electrode layer and the lower surface of the perimetric portion of the air electrode layer of each sheet body are in direct contact with the interposed seal material and the perimetric portion of each sheet body is secured between both the lower surface of the perimetric portion of the upper support member and the upper surface of the perimetric portion of the lower support member, with remaining central portions of the upper and lower surfaces of the sheet body being spaced from remaining central portions of the upper and lower support members, and for each sheet body, a fuel channel through which a fuel gas is supplied is defined and formed in a space formed between a lower surface of a plane portion located at the inner side from the perimetric portion of the upper support member and the upper surface of the fuel electrode layer in the sheet body, and an air channel through which a gas containing oxygen is supplied is defined and formed in a space formed between an upper surface of a plane portion located at the inner side from the perimetric portion of the lower support member and the lower surface of the air electrode layer in the sheet body, wherein the thickness of each sheet body is 20 μm or more and 500 μM or less, the thickness of the fuel electrode layer is greater than the thickness of the solid electrolyte layer and the thickness of the air electrode layer, the area of an orthogonal projection of the plane portion of each support member with respect to the direction perpendicular to the plane of the sheet body is 1 cm a warpage ratio, which is a ratio of a height of a warpage of each sheet body in the direction perpendicular to the plane portion to the area of the orthogonal projection of the plane portion, is 0.05 cm