Gas diffusion electrode and use thereof

Patent metadata

Field	Value
Publication number	US-2017062839-A1
Application number	US-201515309149-A
Country	US
Kind code	A1
Filing date	May 6, 2015
Priority date	May 7, 2014
Publication date	Mar 2, 2017
Grant date	—

Abstract

A gas diffusion electrode may be provided comprising an electron conducting layer with a first side and an opposite second side, wherein the first side is provided with a microstructuring, wherein the gas diffusion electrode additionally has a hydrophobic membrane with a first side and an opposite second side, wherein the second side of the membrane is arranged on the first side of the electron conducting layer. A battery or an accumulator or an electrolyser or a galvanic cell may be provided with a gas diffusion electrode of this type.

First claim

1 . A gas diffusion electrode with an electron conducting layer, comprising a first side and an opposite second side, wherein the first side is provided with a micro-structuring, wherein the gas diffusion electrode further comprises a hydrophobic membrane with a first side and an opposite second side, with the second side of the membrane being arranged on the first side of the electron conducting layer.

2 . The gas diffusion electrode according to claim 1 , wherein the membrane comprises poly-tetrafluoroethylene or is made therefrom, and/or that the membrane has a thickness of approximately 10 μn to approximately 100 μm and/or that the membrane is embodied in a gas-permeable fashion.

3 . The gas diffusion electrode according to claim 1 , wherein the electron conducting layer comprises titanium and/or nickel and/or gold and/or silver and/or molybdenum and/or tungsten and/or a stainless steel alloy or is made therefrom.

4 . The gas diffusion electrode according to claim 1 , wherein the micro-structuring can be generated by radiation with laser beams and/or that the micro-structuring has individual structures with an aspect ratio from approximately 1:3 to 3:1 and/or that the micro-structuring has individual structures with their diameter at the base ranging from approximately 10 μm to approximately 30 μm.

5 . The gas diffusion electrode according to claim 1 , wherein the micro-structuring is partially embedded in the hydrophobic membrane.

6 . The gas diffusion electrode according to claim 1 , wherein the electron conducting layer comprises a plurality of electrolyte channels and/or that the electron conducting layer comprises a plurality of electrolyte channels that each has a diameter from approximately 50 μm to approximately 150 μm.

7 . The gas diffusion electrode according to claim 1 , wherein at least one catalyst is applied on the first side of the electron conducting layer or that at least one catalyst is applied on the first side of the electron conducting layer, which comprises platinum and/or nickel and/or silver and/or palladium and/or at least one manganese oxide and/or rhodium or is made therefrom.

8 . The gas diffusion electrode according to claim 7 , wherein the area coating of the catalyst ranges from approximately 0.05 mg*cm −2 to approximately 0.4 mg*cm −2 or that the area coating of the catalyst ranges from approximately 0.1 mg*cm −2 to approximately 0.35 mg*cm −2 .

9 . The gas diffusion electrode according to claim 1 , wherein a separator is arranged on the second side of the electron conducting layer and/or that a separator is arranged on the second side of the electron conducting layer which has a thickness from approximately 10 μm to approximately 200 μm or that a separator is arranged on the second side of the electron conducting layer, which has a thickness from approximately 20 μm to approximately 100 μm.

10 . A battery or an accumulator or an electrolyzer or a galvanic cell comprising the gas diffusing electrode according to claim 1 .

Assignees

• Fraunhofer Ges Forschung

Inventors

• Schade Wolfgang
• Gabler Andreas

Classifications

• H01M4/88

  Processes of manufacture · CPC title

• H01M4/42

  Alloys based on zinc · CPC title

• H01M4/8605

  Porous electrodes · CPC title

• H01M4/96

  Carbon-based electrodes · CPC title

• H01M4/366

  as layered products · CPC title