Patent ID: 7968246

Claim:
A solid oxide fuel cell comprising: a single or a plurality of sheet bodies each being a fired laminate of a solid electrolyte layer, a fuel electrode layer formed on an upper surface of the solid electrolyte layer, and an air electrode layer formed on a lower surface of the solid electrolyte layer, and a plurality of support members for supporting the single or the plurality of sheet bodies, each support member having a plane portion and a frame portion provided along an overall perimeter of the plane portion and thicker than the plane portion, the single or the plurality of sheet bodies and the plurality of support members being stacked in alternating layers, wherein each of the sheet bodies is held between an upper support member, which is the support member adjacent to and located above the sheet body, and a lower support member, which is the support member adjacent to and located below the sheet body, such that an overall perimetric portion of the sheet body is sandwiched between the frame portion of the upper support member and the frame portion of the lower support member, whereby a lower surface of the plane portion of the upper support member, an inner wall surface of the frame portion of the upper support member, and an upper surface of the fuel electrode layer of the sheet body define a fuel flow channel to which a fuel gas is supplied, and an upper surface of the plane portion of the lower support member, an inner wall surface of the frame portion of the lower support member, and a lower surface of the air electrode layer of the sheet body define an air flow channel to which a gas that contains oxygen is supplied, and the sheet bodies are warped downward at room temperature and at a working temperature of the solid oxide fuel cell higher than room temperature, and a warp height of each of the sheet bodies along a direction perpendicular to a planar direction of the sheet body is lower at the working temperature than at room temperature.