STACK STRUCTURE FOR STACKED SOLID-OXIDE FUEL CELL, AND STACKED SOLID-OXIDE FUEL CELL AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a stacked solid-oxide fuel cell (SOFC) in which a mechanical strength as the SOFC can be secured as a whole without depending on a mechanical strength of a unit cell.SOLUTION: A stack structure comprises: a plurality of unit cells 2 each stacked while including a fuel electrode layer 6 including a fuel electrode 7 and an air electrode layer 8 including an air electrode 9, which are disposed while opposing each other with a solid electrolyte 4 interposed therebetween; a separator 14 interposed between the layered unit cells for separating the unit cells; and seal parts 10a, 10b which are disposed within the fuel electrode layers and the air electrode layers and equal with the separator or the solid electrolyte regarding at least a thermal expansion/contraction property, and include non-porous portions integrated with edges of the fuel electrodes or edges of the air electrodes and integrated to the separator and the solid electrolyte. The stack structure is formed so as to circulate fuel gas and air gas to be supplied to the fuel electrodes and the air electrodes, respectively.