Conductive member, cell, cell stack device, module, and module housing device

Patent metadata

Field	Value
Publication number	US-11799095-B2
Application number	US-202117799905-A
Country	US
Kind code	B2
Filing date	Jun 29, 2021
Priority date	Nov 26, 2020
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A conductive member includes a base material and a covering part located on the base material and containing a first element. The base material contains chromium. The first element has a smaller value of first ionization energy and a smaller absolute value of free energy formation of oxide than chromium.

First claim

The invention claimed is:

1. A conductive member comprising:
a base material containing chromium; and
a covering part located on the base material, having a thickness that is 150 nm or less, and containing a first element having a smaller value of first ionization energy and a smaller absolute value of free energy formation of oxide than chromium.

2. The conductive member according to claim 1 , wherein
the covering part contains a first oxide that is an oxide of the first element.

3. The conductive member according to claim 1 , wherein
a coating layer provided on the base material, the coating layer having a composition different from a composition of the covering part, and
the covering part is located between the base material and the coating layer.

4. The conductive member according to claim 3 , wherein
the covering part contains a first oxide that is an oxide of the first element,
the coating layer contains a second oxide containing manganese (Mn) and cobalt (Co), and
the second oxide contained in the coating layer has a molar ratio of Mn greater than a molar ratio of Co.

5. The conductive member according to claim 3 , wherein
the coating layer is porous.

6. The conductive member according to claim 1 , wherein
the covering part comprises a plurality of particles containing the first element.

7. The conductive member according to claim 1 , wherein
the covering part comprises a coating film containing the first element and covering the base material.

8. A cell comprising:
an element unit including a fuel electrode, a solid electrolyte layer, and an air electrode;
and
the conductive member according to claim 7 , the conductive member being connected to the element unit, wherein
the conductive member includes a first surface connected to the element unit, a second surface located away from the element unit, and a third surface that connects the first surface and the second surface, and
a first average thickness of the covering part located between the first surface and the base material is different from a second average thickness of the covering part located between the third surface and the base material.

9. The cell according to claim 8 , wherein
the first average thickness is greater than the second average thickness.

10. A cell stack device comprising:
a plurality of the cells according to claim 8 .

11. A cell comprising:
an element unit including a fuel electrode, a solid electrolyte layer, and an air electrode;
and
the conductive member according to claim 1 , the conductive member being connected to the element unit.

12. The cell according to claim 11 , wherein
the conductive member comprises a first surface connected to the element unit, a second surface located away from the element unit, and a third surface that connects the first surface and the second surface, and
a first area ratio of the covering part located between the first surface and the base material is different from a second area ratio of the covering part located between the third surface and the base material.

13. The cell according to claim 12 , wherein
the first area ratio is greater than the second area ratio.

14. A cell stack device comprising:
a plurality of the cells according to claim 11 .

15. A module comprising:
the cell stack device according to claim 14 ; and
a housing container that houses the cell stack device.

16. A module housing device comprising:
the module according to claim 15 ;
an auxiliary device for operating the module; and
an external case that houses the module and the auxiliary device.

Assignees

• Kyocera Corp

Inventors

• Hirao Kazuki
• Hara Akihiro
• Yamaguchi Atsuki

Classifications

• H01M8/0228 Primary

  in the form of layered or coated products · CPC title

• H01M8/0206

  Metals or alloys · CPC title

• H01M8/0232

  Metals or alloys · CPC title

• H01M8/2475

  Enclosures, casings or containers of fuel cell stacks · CPC title

• H01M8/021 Primary

  Alloys based on iron · CPC title