| abstract |
The purpose is to obtain a high-efficiency fuel cell that utilizes the internal modification reaction reasonably and efficiently even if the anode electrode layer provided in the fuel cell is tens of micrometers in size. Means for solving the problem include a fuel cell in which an anode electrode layer and a cathode electrode layer are formed across an electrolyte layer, a reducing gas supply path for supplying a gas containing hydrogen to the anode electrode layer, and a gas containing oxygen to the cathode electrode layer. An oxidizing gas supply path; at least a part of the reducing gas supply path, a fuel cell unit (U) having an internal reforming catalyst layer having a reforming catalyst for reforming fuel gas with water vapor; An external reformer (34) provided with a reforming catalyst for reforming the fuel gas with water vapor is provided upstream of the reducing gas supply path, and an external reformer (34) is used to partially reform the fuel. The gas is supplied to the reducing gas supply path. |