Solid oxide fuel cells
AssigneeThe Dow Chemical Company
InventorYi-Hung Chiao
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Abstract
A fuel cell stack made from two different ceramic materials which are used to form four distinct layers of each individual fuel cell is provided. The fuel cell stack uses a ceramic ionic conductor to form the electrolyte layer and a ceramic electronic conductor to form an interconnect layer, with the anode and cathode formed from the combination of the electronic and ionic conductor materials. The internally balanced or mirror symmetric configuration eliminates the warpage or camber problems encountered in conventional multilayer cosintering systems, and the use of common materials in adjacent layers enhances bonding across the adjoining interfaces.
Claims8
A bi-material fuel cell unit comprising:
- a first ceramic ionic conductor material forming an electrolytic layer having an anode side and a cathode side;
- a second material forming two ceramic electronic conductor layers;
- an anode layer interposed between the anode side of the electrolytic layer and one ceramic electronic conductor layer, the anode layer composed of a mixture of the first and second materials;
- a cathode layer interposed between the cathode side of the electrolytic layer and the other interconnect layer, the cathode layer composed of a mixture of the first and second materials.
A bi-material fuel cell stack comprising:
- a first ceramic ionic conductor material forming a plurality of electrolytic layers, each electrolytic layer having a first anode surface and a first cathode surface;
- a second ceramic electronic conductor material forming a plurality of interconnect layers, each interconnect layer having a second anode surface and a second cathode surface;
- a plurality of anode layers, each anode layer interposed between the anode surface of one of the plurality of electrolytic layers and an adjacent second anode surface of one of the plurality of interconnect layers, each of the plurality of anode layers being composed of a mixture of the first and second materials;
- a plurality of cathode layers, each cathode layer interposed between the cathode surface of one of the plurality of electrolytic layers and an adjacent second cathode surface of one of the plurality of interconnect layers, each of the plurality of cathode layers being composed of a mixture of the first and second materials.
Dependencies are inferred from the claim text.