Electrode material for fuel electrode, solid electrolyte-electrode laminate, method for producing solid electrolyte-electrode laminate, and fuel cell

Patent metadata

Field	Value
Publication number	US-9853295-B2
Application number	US-201414912467-A
Country	US
Kind code	B2
Filing date	Aug 5, 2014
Priority date	Aug 27, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

The present invention inexpensively provides an electrode material for a fuel electrode, the electrode material having CO 2 resistance and being capable of forming a fuel cell having high electricity generation performance. An electrode material for a fuel electrode, the electrode material constituting a fuel electrode of a fuel cell including a proton-conductive solid electrolyte layer, includes a perovskite-type solid electrolyte component and a nickel (Ni) catalyst component, in which the solid electrolyte component includes a barium component, a zirconium component, a cerium component, and a yttrium component, and the mixture ratio of the zirconium component to the cerium component in the solid electrolyte component is set to be 1:7 to 7:1 in terms of molar ratio.

First claim

The invention claimed is:

1. An electrode material for a fuel electrode, the electrode material constituting a fuel electrode of a fuel cell including a proton-conductive solid electrolyte layer, comprising:
a perovskite-type solid electrolyte component and a nickel (Ni) catalyst component,
wherein the solid electrolyte component includes a barium component, a zirconium component, a cerium component, and a yttrium component; and
the mixture ratio of the zirconium component to the cerium component in the solid electrolyte component is 1:1 in terms of molar ratio.

2. The electrode material for a fuel electrode according to claim 1 , wherein the content of the nickel (Ni) catalyst component is 40% to 80% by volume relative to the total volume.

3. A solid electrolyte-electrode laminate which is formed by integrally sintering a solid electrolyte layer and a fuel electrode,
wherein the fuel electrode is formed of the electrode material for a fuel electrode according to claim 1 ; and
the solid electrolyte layer includes yttrium doped barium cerate (BCY), yttrium doped barium zirconate (BZY), or a solid solution of these materials.

4. The solid electrolyte-electrode laminate according to claim 3 , wherein the solid electrolyte layer is composed of the same component as the solid electrolyte component in the electrode material for a fuel electrode.

5. A method for producing the solid electrolyte-electrode laminate according to claim 3 , the method comprising:
a fuel electrode molding step in which, by molding the electrode material for a fuel electrode, a fuel electrode molded body is formed;
a solid electrolyte deposition step in which a solid electrolyte material is deposited on one surface of the fuel electrode molded body; and
a sintering step in which the fuel electrode molded body on which the solid electrolyte material has been deposited is sintered.

6. A fuel cell comprising a fuel electrode formed of the electrode material for a fuel electrode according to claim 1 .

7. A fuel cell comprising a fuel electrode formed of the electrode material for a fuel electrode according to claim 2 .

8. The electrode material for a fuel electrode according to claim 1 , wherein the mixture ratio of the zirconium component, the cerium component, and the yttrium component is 1:1:0.5.

9. The electrode material for a fuel electrode according to claim 8 , wherein the content of the nickel (Ni) catalyst component is 40% to 80% by volume relative to the total volume.

10. A solid electrolyte-electrode laminate which is formed by integrally sintering a solid electrolyte layer and a fuel electrode,
wherein the fuel electrode is formed of the electrode material for a fuel electrode according to claim 8 ; and
the solid electrolyte layer includes yttrium doped barium cerate (BCY), yttrium doped barium zirconate (BZY), or a solid solution of these materials.

11. A fuel cell comprising a fuel electrode formed of the electrode material for a fuel electrode according to claim 8 .

12. The solid electrolyte-electrode laminate according to claim 10 , wherein the solid electrolyte layer is composed of the same component as the solid electrolyte component in the electrode material for a fuel electrode.

13. A method for producing the solid electrolyte-electrode laminate according to claim 10 , the method comprising:
a fuel electrode molding step in which, by molding the electrode material for a fuel electrode, a fuel electrode molded body is formed;
a solid electrolyte deposition step in which a solid electrolyte material is deposited on one surface of the fuel electrode molded body; and
a sintering step in which the fuel electrode molded body on which the solid electrolyte material has been deposited is sintered.

Assignees

• Sumitomo Electric Industries

Inventors

• Higashino Takahiro
• Majima Masatoshi
• Mizuhara Naho
• Hiraiwa Chihiro

Classifications

• Y02E60/50

  Fuel cells · CPC title

• Y02E60/525

  Cross-Sectional Technologies · mapped topic

• H01M8/126

  the electrolyte containing cerium oxide · CPC title

• H01M4/8652

  as mixture · CPC title

• H01M4/8889

  Cosintering or cofiring of a catalytic active layer with another type of layer · CPC title