# US 2025/0096283 A1 · Conductive member, fuel cell, and electrolysis device

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- Number: US 2025/0096283 A1
- Document ID: US20250096283A1
- Status: Published application
- Kind: A1
- Application number: 18/580,813
- Filed: 2022-03-29
- Published: 2025-03-20
- Earliest claimed: 2021-07-21
- Assignees: Sumitomo Electric Industries, Ltd.
- Applicants: Sumitomo Electric Industries, Ltd.
- Inventors: Takahiro HIGASHINO; Yohei NODA; Koma NUMATA; Kosei TAKEDA; Naho MIZUHARA; Kazuki OKUNO; Masatoshi MAJIMA
- Web page: https://patentgrep.com/patent/US20250096283A1

## CPC

- H01M 8/0245: in the form of layered or coated products
- C25B 1/04: by electrolysis of water
- C25B 11/031: Porous electrodes
- C25B 11/032: Gas diffusion electrodes
- C25B 11/046: Alloys
- C25B 11/055: characterised by the substrate or carrier material
- H01M 8/0228: in the form of layered or coated products
- H01M 8/0232: Metals or alloys
- H01M 8/0247: characterised by the form (characterised by a channel configuration H01M8/0258)
- H01M 8/0258: characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- C25B 9/75: having bipolar electrodes
- C25B 9/77: having diaphragms
- H01B 5/02: Single bars, rods, wires, or strips
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

This conductive member includes a first layer and a second layer. The first layer is a porous body. The second layer is laminated on the first layer. The first layer is used for a current collector for a fuel cell or an electrode for an electrolysis device. The porosity of the second layer is lower than the porosity of the first layer. The porosity of the second layer is less than or equal to 5%.

## Claims

### Claim 1

A conductive member comprising:
a first layer that is a porous body; and
a second layer laminated on the first layer, wherein
the first layer is used for a current collector for a fuel cell or an electrode for an electrolysis device,
the second layer has a porosity lower than a porosity of the first layer, and
the porosity of the second layer is less than or equal to 5%.

### Claim 2 (depends on 1)

The conductive member according to claim 1, further comprising a third layer that is a porous body, the third layer being located on a side of the second layer opposite to a side where the first layer is located and being laminated on the second layer, wherein
the third layer has a porosity higher than the porosity of the second layer, and
the second layer has no through hole.

### Claim 3 (depends on 2)

The conductive member according to claim 2, wherein the porosity of each of the first layer and the third layer is greater than or equal to 50%.

### Claim 4 (depends on 2)

The conductive member according to claim 2, wherein a ratio of a total thickness of the first layer and the third layer to a total thickness of the first layer, the second layer, and the third layer is greater than or equal to 10% and less than or equal to 90%.

### Claim 5 (depends on 2)

The conductive member according to claim 2, wherein a material constituting the first layer, a material constituting the second layer, and a material constituting the third layer each contain at least one selected from the group consisting of nickel, cobalt, manganese, iron, copper, chromium, aluminum, zinc, titanium, and tin, and alloys thereof.

### Claim 6 (depends on 2)

The conductive member according to claim 2, wherein at least one of a surface of the first layer on a side opposite to a side where the second layer is located, a surface of the first layer on the side where the second layer is located, a surface of the third layer on a side opposite to a side where the second layer is located, and a surface of the third layer on the side where the second layer is located has a groove.

### Claim 7 (depends on 2)

The conductive member according to claim 2, wherein at least one of the first layer or the third layer has a through hole.

### Claim 8 (depends on 1)

The conductive member according to claim 1, wherein the second layer has a plurality of through holes.

### Claim 9 (depends on 8)

The conductive member according to claim 8, wherein the first layer has a plurality of recesses in a surface facing the through holes of the second layer.

### Claim 10 (depends on 8)

The conductive member according to claim 8, wherein a material constituting the first layer and a material constituting the second layer each contain at least one selected from the group consisting of nickel, cobalt, manganese, iron, copper, chromium, aluminum, zinc, titanium, and tin, and alloys thereof.

### Claim 11 (depends on 1)

The conductive member according to claim 1, wherein
the first layer has:
a plurality of first holes having a diameter greater than or equal to 1 mm;
a plurality of second holes having a diameter greater than or equal to 100 μm and less than 1 mm; and
a plurality of third holes having a diameter less than 100 μm.

### Claim 12 (depends on 2)

A fuel cell comprising the conductive member according to claim 2.

### Claim 13 (depends on 8)

An electrolysis device comprising the conductive member according to claim 8.