Patent ID: 7981564

Claim:
An operating method of a solid electrolyte fuel cell, the solid electrolyte fuel cell comprising an air electrode current collector formed of a porous silver material or a silver-coated porous metal material laminated so as to be in contact with an air electrode of a power generating cell, and an air electrode current collector-side separator in which a silver plating layer is formed on the surface of a side of the air electrode current collector-side separator in contact with the air electrode current collector, said method comprising: producing silver vapor-containing air by enabling air to pass through a heated silver member while the air is in contact with the heated silver member, and supplying the silver vapor-containing air to the air electrode current collector formed of a porous silver material or a silver-coated porous metal material, wherein the fuel cell comprises an air supply passage connected to the air electrode current collector-side separator, and wherein the silver member comprises a housing having a larger cross-sectional area than a cross-sectional area of the air supply passage, the air supply passage housing including a porous silver material having continuous holes, a silver particle aggregate, a silver fine wire aggregate or a silver gauze laminate.