Porous transport layer with high chemical durability and a method for preparing the same

Patent metadata

Field	Value
Publication number	US-2024141513-A1
Application number	US-202318112848-A
Country	US
Kind code	A1
Filing date	Feb 22, 2023
Priority date	Oct 31, 2022
Publication date	May 2, 2024
Grant date	—

Abstract

A porous transport layer is disclosed. The porous transport layer includes a base layer containing a titanium family element, a first coating layer disposed on one surface of the base layer and containing iridium (Ir), and a second coating layer disposed on the other surface of the base layer, and containing at least one of platinum (Pt), gold (Au), and silver (Ag), and a method for preparing the same.

First claim

What is claimed is:

1 . A porous transport layer comprising:
a base layer comprising a titanium family element; a first coating layer disposed on a first surface of the base layer, wherein the first coating layer comprises iridium (Ir); and a second coating layer disposed on a second, opposite surface of the base layer, wherein the second coating layer comprises platinum (Pt), gold (Au), silver (Ag), or combinations thereof.

2 . The porous transport layer of claim 1 , wherein the titanium family element comprises titanium, zirconium, hafnium, or combinations thereof.

3 . The porous transport layer of claim 1 , wherein the second coating layer further comprises ruthenium (Ru), palladium (Pd), rhodium (Rh), osmium (Os), or combinations thereof.

4 . The porous transport layer of claim 1 , wherein the first coating layer has an average thickness in a range from 1 to 10 micrometers (μm),
wherein the base layer has an average thickness in a range from 20 to 1,000 μm, and
wherein the second coating layer has an average thickness in a range from 1 to 10 μm.

5 . The porous transport layer of claim 1 , further comprising:
an antioxidant layer disposed on the first coating layer such that the first coating layer is positioned between the antioxidant layer and the base layer, wherein the antioxidant layer comprises a lanthanide element.

6 . The porous transport layer of claim 5 , wherein the antioxidant layer has an average thickness in a range from 5 to 100 μm.

7 . The porous transport layer of claim 5 , further comprising:
a bonding layer disposed on the antioxidant layer such that the antioxidant layer is positioned between the bonding layer and the first coating layer, wherein the bonding layer comprises an ionomer.

8 . The porous transport layer of claim 7 , wherein the bonding layer contains the ionomer of an applied amount equal to or greater than 1 μg/cm 2 .

9 . The porous transport layer of claim 7 , wherein the bonding layer is in a form of a plurality of discontinuous dots on the antioxidant layer.

10 . The porous transport layer of claim 7 , wherein the bonding layer is a continuous layer on the antioxidant layer.

11 . A water electrolysis cell or a fuel cell comprising:
a porous transport layer comprising:
a base layer comprising a titanium family element;
a first coating layer disposed on a first surface of the base layer, wherein the first coating layer comprises iridium (Ir); and
a second coating layer disposed on a second, opposite surface of the base layer, wherein the second coating layer comprises platinum (Pt), gold (Au), silver (Ag), or combinations thereof.

12 . The water electrolysis cell or the fuel cell of claim 11 , further comprising:
an anode bipolar plate disposed on the second coating layer of the porous transport layer; and a membrane-electrode assembly (MEA) disposed on the first coating layer.

13 . A method for preparing a porous transport layer, the method comprising:
stacking a first coating layer containing iridium (Ir) on a first surface of a base layer, wherein the first coating layer comprises a titanium family element; and stacking a second coating layer on a second, opposite surface of the base layer, wherein the second coating layer comprises platinum (Pt), gold (Au), silver (Ag), or combinations thereof.

14 . The method of claim 13 , wherein the titanium family element comprises titanium, zirconium, hafnium, or combinations thereof.

15 . The method of claim 13 , wherein the second coating layer further comprises ruthenium (Ru), palladium (Pd), rhodium (Rh), osmium (Os), or combinations thereof.

16 . The method of claim 13 , wherein each of the first coating layer and the second coating layer is independently formed using a spray coating method, a 3D printing method, an inkjet printing method, a slot die coating method, a bar coating method, a powder scattering coating method, a screen printing method, or a knife coating method.

17 . The method of claim 13 , further comprising:
stacking an antioxidant layer on the first coating layer such that the first coating layer is positioned between the antioxidant layer and the base layer, wherein the antioxidant layer comprises a lanthanide element.

18 . The method of claim 17 , further comprising:
stacking a bonding layer on the antioxidant layer such that the antioxidant layer is positioned between the bonding layer and the first coating layer, wherein the bonding layer comprises a hydrogen ion conductive polymer.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Korea Advanced Inst Sci & Tech

Inventors

• Park Young June
• Jung Woo Chul
• Nam Seong Woo
• Kim Sang Woo

Classifications

• C25B9/60 Primary

  Constructional parts of cells · CPC title

• C25B15/08

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• C25B9/77

  having diaphragms · CPC title

• C25B9/75

  having bipolar electrodes · CPC title

• C25B1/04

  by electrolysis of water · CPC title