Reinforced membrane, electrochemical cell and fuel cell comprising same, and production method for reinforced membrane

Patent metadata

Field	Value
Publication number	US-10476094-B2
Application number	US-201715777997-A
Country	US
Kind code	B2
Filing date	Mar 31, 2017
Priority date	Mar 31, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

The present specification relates to a reinforced membrane including a porous polymer support; platinum nanoparticles that are dispersed on both surfaces of the porous polymer support and the surface in the pores; and an ion conductive polymer provided in the pores of the porous polymer support, in which the average diameter of the platinum nanoparticles is 1 nm or more and 50 nm or less.

First claim

The invention claimed is:

1. A reinforced membrane comprising:
a porous polymer support;
platinum nanoparticles that are dispersed on both surfaces of the porous polymer support and the surface in the pores of the porous polymer support; and
an ion conductive polymer provided in the pores of the porous polymer support,
wherein the average diameter of the platinum nanoparticles is 1 nm or more and 50 nm or less.

2. The reinforced membrane of claim 1 , wherein the porous polymer support includes a polyolefin-based polymer.

3. The reinforced membrane of claim 1 , wherein the porosity of the porous polymer support is 50% or more and 95% or less.

4. The reinforced membrane of claim 1 , wherein the content of the platinum nanoparticles is 0.1 wt % or more and 10 wt % or less based on the total weight of the reinforced membrane.

5. An electrochemical cell comprising:
an anode; and
a cathode: and
the reinforced membrane of claim 1 provided between the anode and the cathode.

6. A membrane electrode assembly comprising:
an anode;
a cathode: and
the reinforced membrane of claim 1 provided between the anode and the cathode.

7. A fuel cell comprising the membrane electrode assembly of claim 6 .

8. A method for preparing a reinforced membrane comprising:
forming platinum nanoparticles that are dispersed on both surfaces of a porous polymer support and the surface in pores of the porous polymer support by impregnating the porous polymer support with a solution including a precursor of the platinum nanoparticles; and
forming an ion conductive polymer in the pores of the porous polymer support with the platinum nanoparticles provided on the surface,
wherein the average diameter of the platinum nanoparticles is 1 nm or more and 50 nm or less.

9. The method of claim 8 , wherein the forming of the ion conductive polymer includes impregnating the porous polymer support in which the platinum nanoparticles are dispersed on both surfaces and the surface in the pores with the solution including the ion conductive polymer.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Moonchan
• Park Curie
• Kim Hyuk
• Bae Insung

Classifications

• H01M8/1062

  characterised by the physical properties of the porous support, e.g. its porosity or thickness · CPC title

• H01M8/1004 Primary

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M2004/8684

  Negative electrodes · CPC title

• H01M4/928

  Unsupported catalytic particles; loose particulate catalytic materials, e.g. in fluidised state · CPC title

• H01M2004/8689

  Positive electrodes · CPC title