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US 2006/0040153 A1Published application
Fuel cell
AssigneeHitachi, Ltd.
InventorsHiromi Tokoi, Nariyoshi Kobayashi, Shin Takahashi
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AssigneeHitachi, Ltd.
InventorsHiromi Tokoi, Nariyoshi Kobayashi, Shin Takahashi
Estimating the term…
In a solid oxide fuel cell, the nonuniformity of temperature distribution in the axial direction of a solid electrolyte, the decrease in cell performance caused by a decreased effective cell reaction area, and the damage to cell due to thermal stress generated by a temperature difference are restrained. A reforming catalyst is provided in a high-temperature portion on the anode side to cool the high-temperature portion by means of heat absorption of reforming reaction, or a combustion catalyst is provided in a low-temperature portion on the anode side to heat the low-temperature portion by means of heat generation of combustion reaction, or both of the catalysts are provided, by which the occurrence of variations in temperature in a cell reaction region of anode is prevented. In addition, an air flow from an air introduction tube of cathode is branchingly sprayed so that a cooling effect is produced in the high-temperature portion, by which an effect of restraining the variations in temperature can further be increased.
A fuel cell provided with an anode on one side and a cathode on the other side with an electrolyte being held therebetween, wherein a region in which concentration of a reforming catalyst for reforming a fuel is increased is provided in a high-temperature portion in a cell reaction region of the anode.
A fuel cell provided with an anode on one side and a cathode on the other side with an electrolyte being held therebetween, wherein a region in which concentration of a combustion catalyst for burning a fuel is increased is provided in a low-temperature portion in a cell reaction region of the anode.
A fuel cell of a bundle type, which is provided with an anode on one side and a cathode on the other side with an electrolyte being held therebetween, wherein a reforming catalyst is mounted in a high-temperature portion in an anode cell reaction region of one or a plurality of unit cells located in a bundle center, and a combustion catalyst is mounted in a low-temperature portion of the anode cell reaction region of a unit cell located at the outer periphery of bundle.
Dependencies are inferred from the claim text.