# US 10,483,579 B2 · Solid oxide fuel cell

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- Number: US 10,483,579 B2
- Document ID: US10483579B2
- Status: Granted
- Kind: B2
- Application number: 15/580,418
- Filed: 2015-06-09
- Published: 2018-06-21
- Granted: 2019-11-19
- Earliest claimed: 2015-06-09
- Assignees: Nissan Motor Co., Ltd.
- Applicants: Nissan Motor Co., Ltd.
- Inventors: Keita Iritsuki; Takao Izumi
- Web page: https://patentgrep.com/patent/US10483579B2

## CPC

- H01M 8/1226: characterised by the supporting layer
- H01M 8/0232: Metals or alloys
- H01M 8/2432: Grouping of unit cells of planar configuration
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- H01M 2300/0071: Oxides
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 1)

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

### Claim 9 (depends on 1)

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

### Claim 10 (depends on 1)

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

### Claim 11 (depends on 1)

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

### Claim 12 (depends on 1)

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.

### Claim 13 (depends on 1)

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.

### Claim 14 (depends on 1)

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.

### Claim 15 (depends on 1)

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.

### Claim 16 (depends on 15)

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.