SOLID ELECTROLYTE FUEL CELL

摘要

PURPOSE:To strengthen the contact between members by forming an air electrode with a substance whose thermal expansion coefficient is smaller than that of each of a fuel electrode and a solid electrolyte and by forming an interconnector made of a conductor inside an insulator whose thermal expansion coefficient is smaller than that of each of the fuel electrode and the solid electrtolyte. CONSTITUTION:An air electrode 13 is formed with a substance whose thermal expansion coefficient is smaller than that of a fuel electrode 11 and a solid electrolyte 12. An interconnector 16 made of a conductor is formed inside an insulator 15 whose thermal expansion coefficient is smaller than that of each of the fuel electrode 11 and the solid electrolyte 12. Stacking constitution and production process are simplified, and power generation performance and durability of a fuel cell can be increased. By stacking constitution in which thermal expansion coefficient is gradually decreased in the peripheral direction, thermal expansion strain at working temperature is restrained and contact between layers and between the electrode and the interconnector can be strengthened.