Method for producing a gas diffusion electrode and gas diffusion electrode

Patent metadata

Field	Value
Publication number	US-11424457-B2
Application number	US-201716625650-A
Country	US
Kind code	B2
Filing date	Jun 23, 2017
Priority date	Jun 23, 2017
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

Various embodiments include a method for producing a gas diffusion electrode, the method comprising: providing a raw electrode layer comprising an electrically non-conducting web; adapting a thickness of the raw electrode layer; and applying a non-solvent to the raw electrode layer.

First claim

What is claimed is:

1. A method for producing an element for a gas diffusion electrode, the method comprising:
providing a raw electrode layer comprising an electrically non-conducting web;
adapting a thickness of the raw electrode layer;
feeding the raw electrode layer vertically; and
applying a non-solvent to the raw electrode layer during the vertical feeding.

2. The method according to claim 1 , wherein the electrically non-conducting web comprises an organic polymer.

3. The method according to claim 1 , wherein a thickness of the electrically non-conducting web is less than 149 micrometers.

4. The method according to claim 1 , wherein the raw electrode layer comprises particles of an electrode material suspended in a binder.

5. The method according to claim 1 , wherein applying a non-solvent to the raw electrode layer comprises applying a first non-solvent in a closed volume steam and/or spraying the first non-solvent on a surface of the raw-electrode layer.

6. The method according to claim 1 , wherein applying a non-solvent to the raw electrode layer comprises applying a second non-solvent in a non-solvent bath.

7. The method according to claim 1 , wherein providing a raw electrode layer comprises:
providing a first raw electrode layer and a second raw electrode layer; and
pressing together the first raw electrode layer and the second raw electrode layer.

8. The method according to claim 7 , wherein the first raw electrode layer and the second raw electrode layer each comprise an electrically non-conducting web.

9. The method according to claim 1 , further comprising placing a physical barrier in front of a surface of the raw electrode layer before applying the non-solvent to the raw electrode layer.

10. The method according to claim 9 , further comprising controlling a distance between the physical barrier and the surface of the raw electrode layer.

Assignees

• Siemens Energy Global Gmbh & Co Kg

Inventors

• Hansen Martin Kalmar
• Therkildsen Kasper Tipsmark

Classifications

• H01M4/8875

  Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support · CPC title

• H01M4/8896

  Pressing, rolling, calendering (membrane electrode assemblies H01M8/1004) · CPC title

• C25B1/00

  Electrolytic production of inorganic compounds or non-metals · CPC title

• H01M4/8605 Primary

  Porous electrodes · CPC title

• H01M8/0245

  in the form of layered or coated products · CPC title