Solid oxide fuel cell

Patent metadata

Field	Value
Publication number	US-10483579-B2
Application number	US-201515580418-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Jun 9, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A solid oxide fuel cell includes a metal support which is formed from a porous metal substrate and which supports a power generation cell. The metal support includes a power generating area (GA) in which the power generation cell is disposed, and a buffer area (BA) which is formed on an outer side of the power generating area (GA) in an in-plane direction. A pore in the metal support in the buffer area (BA) is filled with a material with a thermal conductivity lower than that of a formation material of the metal support.

First claim

The invention claimed is:

1. A solid oxide fuel cell comprising:
a metal support which is formed from a porous metal substrate and which supports a power generation cell, wherein
the metal support includes a power generating area in which the power generation cell is disposed, a buffer area which is formed on an outer side of the power generating area in an in-plane direction, and an outer peripheral area which is formed on an outer side of the buffer area in the in-plane direction, the metal support is located on the anode side of the power generation cell, a separator is located on the anode side of the power generation cell such that a void region is formed between the separator and the buffer area of the metal support,
the power generation cell is formed as a stacked body of an anode electrode, a solid oxide electrolyte, and a cathode electrode, and
a pore in the metal support in the buffer area is filled with a filler material with a thermal conductivity lower than that of a formation material of the metal support.

2. The solid oxide fuel cell according to claim 1 , wherein
the metal support in the buffer area is formed into a dense layer which does not allow permeation of gas in a thickness direction.

3. The solid oxide fuel cell according to claim 2 , wherein
a gas is made to flow in a flow path space next to the buffer area, the gas having the same temperature as a gas made to flow in a flow path space next to the power generating area.

4. The solid oxide fuel cell according to claim 1 , wherein
a pore diameter of the metal support in a boundary neighborhood portion of the buffer area adjacent to the power generating area is smaller than a pore diameter of the metal support in the power generating area.

5. The solid oxide fuel cell according to claim 1 , wherein the buffer area is a non-power generating area.

6. The solid oxide fuel cell according to claim 1 , wherein the material in the pore in the metal support in the buffer area comprises a ceramic material.

7. The solid oxide fuel cell according to claim 1 , wherein the filler material comprises yttria-stabilized zirconia (YSZ).

8. The solid oxide fuel cell according to claim 1 , wherein the filler material comprises lanthanum strontium magnesium gallate (LSGM).

9. The solid oxide fuel cell according to claim 1 , wherein the filler material comprises samarium-doped ceria (SDC).

10. The solid oxide fuel cell according to claim 1 , wherein the filler material comprises gadolinium-doped ceria (GDC).

11. The solid oxide fuel cell according to claim 1 , wherein the filler material comprises scandium-stabilized zirconia (SSZ).

12. The solid oxide fuel cell according to claim 1 , wherein a thickness of the power generating area and a thickness of the buffer area are smaller than a thickness of the outer peripheral area.

13. The solid oxide fuel cell according to claim 1 , wherein
a thermal conductivity of the buffer area is lower than a thermal conductivity of the power generating area, and
the thermal conductivity of the buffer area is lower than a thermal conductivity of the outer peripheral area.

14. The solid oxide fuel cell according to claim 1 , wherein
a thermal capacity of the buffer area is larger than a thermal capacity of the power generating area, and
the thermal capacity of the buffer area is larger than a thermal capacity of the outer peripheral area.

15. The solid oxide fuel cell according to claim 1 , further comprising
a pair of separators that sandwich the metal support therebetween; and
a pair of seal frames that sandwich a portion of the pair of separators and a portion of the metal support therebetween.

16. The solid oxide fuel cell according to claim 15 , wherein the outer peripheral area of the metal support is the portion of the metal support sandwiched by the pair of seal frames.

Assignees

• Nissan Motor

Inventors

• Iritsuki Keita
• Izumi Takao

Classifications

• H01M8/1226 Primary

  characterised by the supporting layer · CPC title

• H01M2300/0071

  Oxides · CPC title

• H01M8/2432

  Grouping of unit cells of planar configuration · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/0232 Primary

  Metals or alloys · CPC title