| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell stack provided with sealing structure capable of preventing gas from being leaked between a cell and a separator, even under an electric power generating environment operated at 600°C-800°C. <P>SOLUTION: Metal cell frames 30 each for connecting a solid oxide fuel cell 10 to a separator 20 when constituting the solid oxide fuel cell stack which is formed by connecting a plurality of plane-shaped solid oxide fuel cells 10 each formed by sandwiching an electrolyte 12 with an air electrode 11 and a fuel electrode 13 through the metal separators 20, are provided. An outer circumferential part of the electrolyte 12 is joined to the cell frame 30, by elevating a temperature up to a temperature of a melting point of Ag or more under the atmosphere, using a material containing Ag as a main component and containing at least one kind of a metal becoming an oxide after joined and a metal oxide, not re-reduced from then on, as a brazing material 40 for joining the cell frame 30 to the outer circumferential part of the electrolyte 12 of the solid oxide fuel cell 10. The cell frame 30 is formed into structure integrated with the separator. <P>COPYRIGHT: (C)2010,JPO&INPIT |
