# US 12,763,339 B2 · Cell, cell stack device, module, and module housing device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,763,339 B2
- Document ID: US12763339B2
- Status: Granted
- Kind: B2
- Application number: 18/032,780
- Filed: 2021-10-28
- Published: 2023-11-30
- Granted: 2026-10-13
- Earliest claimed: 2020-10-30
- Assignees: KYOCERA Corporation
- Applicants: KYOCERA Corporation
- Inventors: Hiroki Muramatsu; Akihiro Hara
- Web page: https://patentgrep.com/patent/US12763339B2

## CPC

- H01M 4/905: {specially used in fuel cell operating at high temperature, e.g. SOFC}
- H01M 4/8652: {as mixture}
- H01M 8/1213: characterised by the electrode/electrolyte combination or the supporting material
- H01M 8/1246: the electrolyte consisting of oxides
- H01M 8/2475: Enclosures, casings or containers of fuel cell stacks
- H01M 2004/8684: {Negative electrodes}
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- H01M 8/243: Grouping of unit cells of tubular or cylindrical configuration
- H01M 2300/0074: Ion conductive at high temperature
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

A cell includes an air electrode layer, a fuel electrode layer, and a solid electrolyte layer. The fuel electrode layer contains a first rare earth element and a second rare earth element different from the first rare earth element. The solid electrolyte layer is located between the air electrode layer and the fuel electrode layer, and contains the second rare earth element. The fuel electrode layer has a first site and a second site. The second site is located between the first site and the solid electrolyte layer, and contains at least the second rare earth element.

## Claims

### Claim 1

A cell comprising:
a support substrate; and
a fuel electrode layer containing a first rare earth element and a second rare earth element, which is different from the first rare earth element, wherein
the fuel electrode layer comprises a first site located on the support substrate, and a second site located on the first site, the second site containing at least the second rare earth element, and
the support substrate, the first site, and the second site each containing a first particle body having electron conductivity and catalytic action.

### Claim 2 (depends on 1)

The cell according to claim 1, wherein
in the second site, a content of the second rare earth element is larger than a content of the first rare earth element.

### Claim 3 (depends on 1)

The cell according to claim 1, wherein
the first site containing the second rare earth element, and
a content of the second rare earth element in the second site is larger than a content of the second rare earth element in the first site.

### Claim 4 (depends on 1)

The cell according to claim 1, wherein
the fuel electrode layer contains a second particle body having ion conductivity, and
the second particle body comprises a first particle containing the first rare earth element and a second particle containing the second rare earth element.

### Claim 5 (depends on 4)

The cell according to claim 4, wherein
an ion conductivity of the second particle is higher than an ion conductivity of the first particle.

### Claim 6 (depends on 1)

The cell according to claim 1, wherein
a content of the first rare earth element in the first site is larger than a content of the first rare earth element in the second site.

### Claim 7 (depends on 1)

The cell according to claim 1, wherein
a ratio of a content of the first rare earth element to a sum of contents of the first rare earth element and the second rare earth element is larger in the first site than in the second site.

### Claim 8 (depends on 1)

The cell according to claim 1, wherein
a solid electrolyte layer located on the second site, the solid electrolyte layer containing Ce.

### Claim 9 (depends on 1)

A cell stack device, comprising:
a cell stack provided with at least one cell according to claim 1.

### Claim 10 (depends on 9)

A module comprising:
the cell stack device according to claim 9; and
a storage container configured to house the cell stack device.

### Claim 11 (depends on 10)

A module housing device, comprising:
the module according to claim 10;
an auxiliary device configured to operate the module; and
an external case configured to house the module and the auxiliary device.

### Claim 12

A cell comprising:
a support substrate; and
a fuel electrode layer containing a first rare earth element and a second rare earth element, which is different from the first rare earth element, wherein
the fuel electrode layer comprises a first site located on the support substrate, and a second site located on the first site, the second site containing at least the second rare earth element, and the support substrate, the first site, and the second site each containing a first particle body having electron conductivity and catalytic action, wherein
the first site containing the second rare earth element, and a content of the second rare earth element in the second site is larger than a content of the second rare earth element in the first site,
a solid electrolyte layer located on the second site, the solid electrolyte layer containing Ce.