Abstract: A fuel cell system includes: a fuel cell; a catalyst combustor configured to receive raw fuel and oxidant and generate combustion gas of the raw fuel; and a control unit configured to control supplying of the raw fuel and the oxidant to the catalyst combustor. The control unit is configured to supply the raw fuel and the oxidant to the catalyst combustor at the time of startup of the fuel cell system, and when a reforming reaction of the raw fuel turns dominant over a combustion reaction of the raw fuel at the catalyst combustor, increase an air-fuel ratio that is a ratio of the oxidant to the raw fuel, compared to the air-fuel ratio before the reforming reaction turns dominant.

Abstract: A fuel cell system includes: a fuel cell; a catalyst combustor configured to receive raw fuel and oxidant and generate combustion gas of the raw fuel; and a control unit configured to control supplying of the raw fuel and the oxidant to the catalyst combustor. The control unit is configured to supply the raw fuel and the oxidant to the catalyst combustor at the time of startup of the fuel cell system, and when a reforming reaction of the raw fuel turns dominant over a combustion reaction of the raw fuel at the catalyst combustor, increase an air-fuel ratio that is a ratio of the oxidant to the raw fuel, compared to the air-fuel ratio before the reforming reaction turns dominant.

Abstract: A fuel cell includes a metal supporting plate, a cell structure, a separator, a glass sealing member and a coating layer. The cell structure includes an electrolyte layer disposed on the metal supporting plate. The separator is disposed on the cell structure. The glass sealing member is disposed between the metal supporting plate and the separator at an outer side of the cell structure. The coating layer is disposed between the metal supporting plate and the glass sealing member and is contact with the metal supporting plate and the glass sealing member. The cell structure and the coating layer are provided with a gap predetermined between the cell structure and the coating layer.

Abstract: A fuel cell includes a metal supporting plate, a cell structure, a separator, a glass sealing member and a coating layer. The cell structure includes an electrolyte layer disposed on the metal supporting plate. The separator is disposed on the cell structure. The glass sealing member is disposed between the metal supporting plate and the separator at an outer side of the cell structure. The coating layer is disposed between the metal supporting plate and the glass sealing member and is contact with the metal supporting plate and the glass sealing member. The cell structure and the coating layer are provided with a gap predetermined between the cell structure and the coating layer.