Fuel cell

Patent metadata

Field	Value
Publication number	US-9287575-B2
Application number	US-201314034244-A
Country	US
Kind code	B2
Filing date	Sep 23, 2013
Priority date	Mar 30, 2011
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Provided is a fuel cell having a long product life. In the fuel cell, an interlayer is arranged between a portion of an interconnector which is formed of Ag or an Ag alloy and a first electrode containing Ni. The interlayer is formed of an oxide containing Ni and Ti.

First claim

The invention claimed is:

1. A fuel cell comprising:
a power generating element having a solid oxide electrolyte layer, a first electrode arranged on one principal surface of the solid oxide electrolyte layer, and a second electrode arranged on the other principal surface of the solid oxide electrolyte layer;
a separator arranged on the first electrode so as to form a channel facing the first electrode; and
an interconnector connected to the first electrode, wherein
the first electrode contains Ni,
the interconnector comprises a Ag or Ag alloy portion, and
the fuel cell further comprises a Ni and Ti oxide containing interlayer arranged within via holes in the separator and between the Ag or Ag alloy portion of the interconnector and the first electrode.

2. The fuel cell according to claim 1 , wherein the interlayer contains a NiTiO 3 crystal phase during manufacturing of the fuel cell.

3. The fuel cell according to claim 2 , wherein the interlayer further contains a NiO crystal phase during manufacturing of the fuel cell.

4. The fuel cell according to claim 3 , wherein the molar ratio of Ni and Ti (Ni:Ti) in the interlayer is in a range of 62:38 to 95:5.

5. The fuel cell according to claim 4 , wherein the first electrode is yttria stabilized zirconia containing Ni, scandia stabilized zirconia containing Ni, Ni-containing ceria doped with Gd or Ni-containing ceria doped with Sm.

6. The fuel cell according to claim 5 , wherein the interconnector has a Ag—Pd alloy portion.

7. The fuel cell according to claim 2 , wherein the molar ratio of Ni and Ti (Ni:Ti) in the interlayer is in a range of 62:38 to 95:5.

8. The fuel cell according to claim 7 , wherein the first electrode is yttria stabilized zirconia containing Ni, scandia stabilized zirconia containing Ni, Ni-containing ceria doped with Gd or Ni-containing ceria doped with Sm.

9. The fuel cell according to claim 8 , wherein the interconnector has a Ag—Pd alloy portion.

10. The fuel cell according to claim 1 , wherein the molar ratio of Ni and Ti (Ni:Ti) in the interlayer is in a range of 62:38 to 95:5.

11. The fuel cell according to claim 10 , wherein the first electrode is yttria stabilized zirconia containing Ni, scandia stabilized zirconia containing Ni, Ni-containing ceria doped with Gd or Ni-containing ceria doped with Sm.

12. The fuel cell according to claim 11 , wherein the interconnector has a Ag—Pd alloy portion.

13. The fuel cell according to claim 12 , wherein the molar ratio of Ni and Ti (Ni:Ti) in the interlayer is in a range of 71:29 to 91:9.

14. The fuel cell according to claim 13 , wherein the first electrode contains about 40% to 80% by mass of Ni in terms of oxide.

15. The fuel cell according to claim 1 , wherein the molar ratio of Ni and Ti (Ni:Ti) in the interlayer is in a range of 71:29 to 91:9.

16. The fuel cell according to claim 15 , wherein the first electrode is yttria stabilized zirconia containing Ni, scandia stabilized zirconia containing Ni, Ni-containing ceria doped with Gd or Ni-containing ceria doped with Sm.

17. The fuel cell according to claim 16 , wherein the interconnector has a Ag—Pd alloy portion.

18. The fuel cell according to claim 1 , wherein the first electrode is yttria stabilized zirconia containing Ni, scandia stabilized zirconia containing Ni, Ni-containing ceria doped with Gd or Ni-containing ceria doped with Sm.

19. The fuel cell according to claim 18 , wherein the interconnector has a Ag—Pd alloy portion.

20. The fuel cell according to claim 1 , wherein the interconnector has a Ag—Pd alloy portion.

Assignees

• Murata Manufacturing Co

Inventors

• Mori Naoya
• Takata Kazuhide

Classifications

• H01M8/0256

  Vias, i.e. connectors passing through the separator material · CPC title

• H01M8/0206 Primary

  Metals or alloys · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/0228

  in the form of layered or coated products · CPC title

• H01M8/1213

  characterised by the electrode/electrolyte combination or the supporting material · CPC title