Planar high-temperature fuel cell
View Patent ↗A planar high temperature fuel cell, a use and a method of manufacture are discloses. The planar high-temperature fuel cell with includes a layer structure. The layer structure includes a cathode layer, an anode layer and a solid electrolyte layer disposed between the cathode layer and the anode layer. Each of the layers are planar. A porous metal structure is used as the support for the layer structure and is also planar.
1. A planar high-temperature fuel cell, comprising:
a layer structure, comprising:
a cathode layer,
an anode layer, and
a solid electrolyte layer disposed between the cathode layer and the anode layer; and
a porous metal structure is used as a support for the layer structure, the porous metal structure and each of the layers of the layer structure being of planar design, the porous metal structure being arranged on a cathode side of the layer structure,
wherein the solid electrolyte consists of two layers with different materials.
2. The fuel cell as claimed in claim 1 , further comprising:
a diffusion-limiting layer applied to the porous metal structure and the layer structure deposited on the diffusion-limiting layer.
3. The fuel cell as claimed in claim 1 , wherein the solid electrolyte consists of ScSz and YSz.
4. The fuel cell as claimed in claim 1 , wherein in that the porous metal structure is permeable to the diffusion of reactants or reaction products.
5. The fuel cell as claimed in claim 1 , wherein the porous metal support is a sintered high-grade steel.
6. The fuel cell as claimed in claim 5 , wherein the porosity of the porous metal is greater than 5%.
7. The fuel cell as claimed in claim 6 , wherein the porosity of the porous metal is 10%.
8. The fuel cell as claimed in claim 5 , wherein the porous metal a FeCrR alloy is used, where R stands for a metal component different from Fe or Cr.
9. The fuel cell as claimed in claim 5 , wherein the porous metal comprises a high-grade steel or a Ti-Nb alloy.
10. The fuel cell as claimed in claim 1 , wherein the operating temperature of the fuel cell is between 400 and 800° C. in order to reduce the oxidation kinetics of the metal substrate as far as possible.
11. The fuel cell as claimed in claim 10 , wherein the operating temperature of the fuel cell is between 500 and 700° C.
12. The fuel cell as claimed in claim 10 , wherein the planar design of the individual fuel cells results in a seal-less sandwich construction of the fuel cell stack.
13. The fuel cell as claimed in claim 12 , wherein interconnectors for electrically connecting individual fuel cells are present.
14. A planar high-temperature fuel cell, comprising:
a layer structure, comprising:
a cathode layer,
an anode layer, and
a solid electrolyte layer disposed between the cathode layer and the anode layer; and
a porous metal structure is used as a support for the layer structure, the porous metal structure and each of the layers of the layer structure being of planar design, the porous metal structure being arranged on a cathode side of layer Structure,
wherein the solid electrolyte consists of two layers with different materials, and
wherein the different layers are ScSz and YSz.