# US 12,763,350 B2 · Electrode, membrane electrode assembly, electrochemical cell, stack, and electrolyzer

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- Number: US 12,763,350 B2
- Document ID: US12763350B2
- Status: Granted
- Kind: B2
- Application number: 18/461,693
- Filed: 2023-09-06
- Published: 2024-04-11
- Granted: 2026-10-13
- Earliest claimed: 2022-10-07
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba; Toshiba Energy Systems & Solutions Corporation
- Inventors: Norihiro Yoshinaga; Hyangmi Jung; Taishi Fukazawa; Yoshihiko Nakano; Hiroaki Hirazawa; Yoshitsune Sugano; Yuki Kudo; Akihiko Ono
- Web page: https://patentgrep.com/patent/US12763350B2

## CPC

- H01M 8/1004: characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence)
- C25B 1/00: Electrolytic production of inorganic compounds or non-metals
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)

## Abstract

An electrode according to an embodiment includes a support, and a catalyst layer including a sheet layer and a gap layer stacked, alternately on the support. The catalyst layer includes noble oxide and non-noble oxide. 4 [wt %] or more and 8 [wt %] or less of metal elements included in the catalyst layer is non-noble metal. An average thickness of the gap layer is 6 [nm] or more and 50 [nm] or less.

## Claims

### Claim 1

An electrode comprising:
a support; and
a catalyst layer including a sheet layer and a gap layer stacked, alternately on the support, wherein
the catalyst layer includes noble oxide and non-noble oxide,
4 [wt %] or more and 8 [wt %] or less of metal elements included in the catalyst layer is non-noble metal, and
an average thickness of the gap layer is 6 [nm] or more and 50 [nm] or less.

### Claim 2 (depends on 1)

The electrode according to claim 1, wherein
the non-noble metal oxide is an oxide including one or more metal elements selected from the group consisting of Ni, Co, and Mn.

### Claim 3 (depends on 1)

The electrode according to claim 1, wherein
the non-noble metal oxide is an oxide including one or more metal elements selected from the group consisting of Ni, Co, and Mn, and
the total ratio of Ni, Co and Mn among the non-noble metal elements included in catalyst layer is 80 [wt %] or more and 100 [wt %] or less.

### Claim 4 (depends on 1)

The electrode according to claim 1, wherein
the noble oxide is an oxide including Ir and/or Ru.

### Claim 5 (depends on 1)

The electrode according to claim 1, wherein
4 [wt %] or more and 7 [wt %] or less of the metal elements in the catalyst layer is non-noble metal.

### Claim 6 (depends on 1)

The electrode according to claim 1, wherein
4 [wt %] or more and 6 [wt %] or less of the metal elements in the catalyst layer is non-noble metal.

### Claim 7 (depends on 6)

A membrane electrolyte assembly comprising:
the electrode according to claim 6.

### Claim 8 (depends on 7)

An electrochemical cell comprising:
the membrane electrolyte assembly according to claim 7.

### Claim 9 (depends on 7)

A stack comprising:
the membrane electrolyte assembly according to claim 7.

### Claim 10 (depends on 8)

A stack comprising:
the electrochemical cell according to claim 8.

### Claim 11 (depends on 9)

An electrolyzer comprising:
the stack according to claim 9.

### Claim 12 (depends on 10)

An electrolyzer comprising:
the stack according to claim 10.