# US 2021/0083301 A1 · Metal porous body, method of producing the same, and fuel cell

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- Number: US 2021/0083301 A1
- Document ID: US20210083301A1
- Status: Published application
- Kind: A1
- Application number: 16/971,786
- Filed: 2019-01-09
- Published: 2021-03-18
- Earliest claimed: 2018-02-27
- Assignees: Sumitomo Electric Industries, Ltd.
- Applicants: Sumitomo Electric Industries, Ltd.
- Inventors: Chihiro HIRAIWA; Masatoshi MAJIMA; Takahiro HIGASHINO; Naho MIZUHARA; Hiromasa TAWARAYAMA
- Web page: https://patentgrep.com/patent/US20210083301A1

## CPC

- B22F 3/1115: {comprising complex forms, e.g. honeycombs}
- H01M 8/0232: Metals or alloys
- B22F 3/1137: {by coating porous removable preforms}
- B22F 7/062: {involving the connection or repairing of preformed parts}
- B22F 7/08: with one or more parts not made from powder {(B22F7/062 takes precedence)}
- C22C 1/08: Alloys with open or closed pores
- H01M 8/0247: characterised by the form (characterised by a channel configuration H01M8/0258)
- H01M 8/12: operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- B22F 3/11: Making porous workpieces or articles
- B22F 3/1103: {with particular physical characteristics}
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- Y02E 60/50: Fuel cells
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A metal porous body having a frame of a three-dimensional network structure, the frame being formed of a plurality of bone members connected to each other, the plurality of bone members defining openings in a surface of the metal porous body, the plurality of bone members defining voids inside the metal porous body, the openings and the voids communicating with each other, a porosity being from 1 volume % to 55 volume %, a density being from 3 g/cm3 to 10 g/cm3.

## Claims

### Claim at position 1

1: A metal porous body having a frame of a three-dimensional network structure,
the frame being formed of a plurality of bone members connected to each other,
the plurality of bone members defining openings in a surface of the metal porous body,
the plurality of bone members defining voids inside the metal porous body,
the openings and the voids communicating with each other,
a porosity being from 1 volume % to 55 volume %,
a density being from 3 g/cm3 to 10 g/cm3.

### Claim at position 2 (depends on 1)

2: The metal porous body according to claim 1, wherein a diameter of the openings is from 3 μm to 55 μm.

### Claim at position 3 (depends on 1)

3: The metal porous body according to claim 1, wherein the metal porous body has a sheet-like outer shape and a thickness from 0.05 mm to 0.2 mm.

### Claim at position 4

4: A method of producing a metal porous body, comprising:
a first step involving preparing a metal material having a frame of a three-dimensional network structure; and
a second step involving pressing the metal material.

### Claim at position 5 (depends on 4)

5: The method of producing a metal porous body according to claim 4, wherein
in the second step, a plurality of the metal materials are stacked so that the metal materials overlap at least partially, and parts thus overlapping are pressed.

### Claim at position 6 (depends on 1)

6: A fuel cell comprising:
a cathode;
an anode;
an electrolyte layer interposed between the cathode and the anode; and
the metal porous body according to claim 1 disposed to face at least one of the cathode and the anode.