| CPC H01M 8/0618 (2013.01) [H01M 4/8657 (2013.01); H01M 8/0232 (2013.01); H01M 8/04022 (2013.01); H01M 8/04089 (2013.01); H01M 8/04738 (2013.01); H01M 8/0637 (2013.01); H01M 8/1213 (2013.01); H01M 8/1226 (2013.01); H01M 8/1231 (2016.02); H01M 2008/1293 (2013.01)] | 30 Claims |
|
1. A fuel cell device comprising:
a fuel cell single unit comprising a solid oxide fuel cell element with operating temperature of 650° C. or higher in which an anode layer formed in a thin layer shape and a cathode layer are formed so as to sandwich an electrolyte layer, a reducing gas supply path for supplying a gas containing hydrogen to the anode layer, an oxidizing gas supply path for supplying a gas containing oxygen to the cathode layer, and an internal reforming catalyst layer, which has a reforming catalyst for steam-reforming a hydrocarbon-based raw fuel gas, in at least a part of the reducing gas supply path;
an external reformer which has a reforming catalyst for reforming the raw fuel gas and is provided upstream of the reducing gas supply path and outside of the fuel cell single unit; and
a control unit configured to control a reforming temperature in the external reformer to be lower than a temperature in the internal reforming catalyst layer provided in the reducing gas supply path,
wherein the raw fuel gas partially reformed in the external reformer is supplied to the reducing gas supply path,
wherein the fuel cell single unit is configured to include one solid oxide fuel cell element formed in a thin layer shape on a metal support made of a metal material selected from ferritic stainless alloy, austenitic stainless alloy, or an alloy containing chromium, the reducing gas supply path, and the oxidizing gas supply path,
wherein the internal reforming catalyst layer for generating at least hydrogen from the raw fuel gas by a steam reforming reaction is included in the fuel cell single unit,
wherein a plurality of through-holes penetrating from a front side to a rear side of the metal support are provided by boring processing,
wherein the anode layer having a thickness 1 μm to 100 μm is provided on the front side of the metal support, and the reducing gas supply path is provided along the rear side,
wherein an internal reforming fuel supply path for discharging steam generated by a power generation reaction from the anode layer to lead the steam to the internal reforming catalyst layer, and to lead at least hydrogen generated in the internal reforming catalyst layer to the anode layer is formed by the through-holes and the reducing gas supply path, and
wherein an oxide layer is provided between the metal support and the anode layer to act as a diffusion suppressing layer for suppressing diffusion of the material between the metal support and the anode layer.
|