Solid oxide fuel cell stack

A solid oxide fuel cell stack comprising:

• a support;
• and
• a plurality of power generation elements provided on a surface of the support, wherein
• when two adjacent power generation elements in the plurality of power generation elements are a first power generation element and a second power generation element, respectively,
• the first power generation element comprises,
• a first fuel electrode,
• a first air electrode, and
• a first solid electrolyte provided between the first fuel electrode and the first air electrode,
• the first fuel electrode being provided between the support and the first air electrode,
• the second power generation element comprises,
• a second fuel electrode,
• a second air electrode, and
• a second solid electrolyte provided between the second fuel electrode and the second air electrode,
• the second fuel electrode being provided between the support and the second air electrode,
• the solid oxide fuel cell stack further comprises an interconnector that electrically connects the first air electrode to the second fuel electrode,
• the first power generation element is connected in series with the second power generation element through the interconnector,
• when a vertical direction from the surface of the support to the first fuel electrode, the first solid electrolyte, and the first air electrode or a vertical direction from the surface of the support to the second fuel electrode, the second solid electrolyte, and the second air electrode is in a Z axis direction,
• the two adjacent power generation elements include
• a first area of the first power generation element, the first area including the second fuel electrode, the first solid electrolyte, and the first air electrode arranged in that order in the Z axis direction,
• a second area of the first power generation element, the second area including the first solid electrolyte and the first air electrode arranged in that order in the Z axis direction,
• a third area of the second power generation element, the third area including the second fuel electrode and the second solid electrolyte arranged in that order in the Z axis direction,
• a fourth area of the first power generation element, the fourth area including the first fuel electrode, the first solid electrolyte, and the first air electrode arranged in that order in the Z axis direction, and
• a fifth area of the first power generation element, the fifth area including the second fuel electrode and the first air electrode arranged in that order in the Z axis direction,
• when a direction that is vertical to the Z axis direction and in which oxide ions migrate is an X axis direction,
• the fourth area, the second area, the first area, the fifth area, and the third area are continuously adjacent in that order in the X axis direction, and
• the interconnector includes
• a sixth portion provided between the second fuel electrode and the first air electrode in the fifth area,
• a first portion provided between the first solid electrolyte and the first air electrode in the second area,
• a second portion provided between the first solid electrolyte and the first air electrode in the first area, and
• a third portion provided between the second fuel electrode and the second solid electrolyte in the third area.