Method of manufacturing metal-air battery

Patent metadata

Field	Value
Publication number	US-2023344039-A1
Application number	US-202118014426-A
Country	US
Kind code	A1
Filing date	Jun 24, 2021
Priority date	Jul 10, 2020
Publication date	Oct 26, 2023
Grant date	—

Abstract

As a method of manufacturing a metal-air battery, a first step is included of stacking an exterior body (e.g., first resin film 11), a water-repellent film (14), and a positive electrode (e.g., air electrode 15) in the stated order. The first step includes: a fusing step of fusing the exterior body and the water-repellent film (14); and a compression step of compressing the water-repellent film (14) and the positive electrode. The fusing step fuses the exterior body and the water-repellent film (14). After the first step, a portion of the exterior body is removed from inside the fusing portion (141) formed in the fusing step, to form an opening (e.g., air inlet 111) in the exterior body.

First claim

1 . A method of manufacturing a metal-air battery, the method comprising a first step of stacking an exterior body, a water-repellent film, and a positive electrode in a stated order,
the first step comprising:
a fusing step of fusing the exterior body and the water-repellent film; and
a compression step of compressing the water-repellent film and the positive electrode,
the fusing step fusing, in a frame shape, a region of the exterior body and the water-repellent film where the exterior body and the water-repellent film overlap, and the method comprising, after the first step, an opening forming step of forming an opening in the exterior body by removing a part of the exterior body from inside a frame-shaped fusing portion formed in the fusing step.

2 . The method according to claim 1 , wherein the positive electrode includes a catalyst layer capable of reducing oxygen.

3 . The method according to claim 1 , further comprising a sealing step of sealing the exterior body.

4 . The method according to claim 3 , wherein
the exterior body includes a first exterior body and a second exterior body, the water-repellent film includes a first water-repellent film and a second water-repellent film, the positive electrode includes a first positive electrode and a second positive electrode, the first step stacks the first exterior body, the first water-repellent film, and the first positive electrode in a stated order and stacks the second exterior body, the second water-repellent film, and the second positive electrode in a stated order, the fusing step comprises:
a first fusing step of fusing the first exterior body and the first water-repellent film; and
a second fusing step of fusing the second exterior body and the second water-repellent film,
the compression step comprises:
a first compression step of compressing the first water-repellent film and the first positive electrode; and
a second compression step of compressing the second water-repellent film and the second positive electrode,

the first fusing step fuses, in a frame shape, a region of the first exterior body and the first water-repellent film where the first exterior body and the first water-repellent film overlap,
the second fusing step fuses, in a frame shape, a region of the second exterior body and the second water-repellent film where the second exterior body and the second water-repellent film overlap,
the opening forming step comprises, after the first step, an opening forming step of forming a first opening and a second opening in the first exterior body and the second exterior body by removing a part of the first exterior body and a part of the second exterior body respectively from inside the frame-shaped fusing portion formed in the fusing step, and
additionally, the sealing step seals the first exterior body and the second exterior body.

5 . The method according to claim 4 , wherein
the first positive electrode is an air electrode capable of reducing oxygen, and the second positive electrode is a charge electrode capable of generating oxygen.

6 . The method according to claim 1 , wherein the positive electrode includes a positive-electrode current collector in contact with the catalyst layer.

7 . The method according to claim 6 , wherein the compression step stacks the water-repellent film, the catalyst layer, and the positive-electrode current collector in a stated order and compresses the water-repellent film, the catalyst layer, and the positive-electrode current collector.

8 . The method according to claim 6 , wherein the catalyst layer and the positive-electrode current collector are compressed in advance before the first step.

9 . The method according to claim 1 , wherein before the first step, the water-repellent film is impregnated with a polyolefin-based resin in such a manner as to correspond to the fused region of the exterior body and the water-repellent film.

10 . The method according to claim 1 , wherein the first step interposes a porous resin layer containing a polyolefin-based resin between the exterior body and the water-repellent film.

11 . The method according to claim 10 , wherein the water-repellent film and the porous resin layer are stacked in advance by fusing the water-repellent film and the porous resin layer.

12 . The method according to claim 11 , wherein the water-repellent film and the porous resin layer are fused by heating from a water-repellent film side.

13 . The method according to claim 1 , wherein
the exterior body includes an opening-providable region that is removable, the fusing step fuses the exterior body and the water-repellent film outside the opening-providable region, the compression step compresses a portion including the opening-providable region, and the opening forming step removes the exterior body in the opening-providable region.

Assignees

• Sharp Kk

Inventors

• Kitagawa Tomo
• Mizuhata Hirotaka
• Sata Shunsuke
• Mitamura Keigo
• Yoshida Akihito

Classifications

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M12/06

  with one metallic and one gaseous electrode · CPC title

• H01M4/86

  Inert electrodes with catalytic activity, e.g. for fuel cells · CPC title

• H01M4/88

  Processes of manufacture · CPC title