Membrane electrode assembly having an organic solvent

Patent metadata

Field	Value
Publication number	US-2025286096-A1
Application number	US-202418599515-A
Country	US
Kind code	A1
Filing date	Mar 8, 2024
Priority date	Mar 8, 2024
Publication date	Sep 11, 2025
Grant date	—

Abstract

A membrane electrode assembly includes a cathode electrode disposed on one end and including a positively charged porous electrode and an anode electrode disposed on an opposite end from the cathode and including a negatively charged porous electrode. The membrane electrode assembly also includes a proton exchange membrane disposed between the cathode and the anode. The cathode and/or anode electrodes further includes a catalyst active material, carbon support molecules, at least one ionomer, and one or more hydrofluoroethers.

First claim

What is claimed is:

1 . A membrane electrode assembly comprising:
a cathode electrode disposed on one end; an anode electrode disposed on an opposite end from the cathode electrode; and a proton exchange membrane disposed between the cathode electrode and the anode electrode, wherein the cathode electrode further includes at least one catalyst layer including a catalyst active material, carbon support molecules, at least one ionomer, and one or more hydrofluoroethers.

2 . The membrane electrode assembly of claim 1 , wherein the ionomer is perfluorosulfonic acid.

3 . The membrane electrode assembly of claim 2 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.2 to about 0.8.

4 . The membrane electrode assembly of claim 2 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.4 to about 0.6.

5 . The membrane electrode assembly of claim 2 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.5.

6 . The membrane electrode assembly of claim 2 , wherein the hydrofluoroether is methyl nonafluorobutyl ether, methyl nonafluoroisobutyl ether, or methyl perfluoropropyl ether.

7 . An fuel cell incorporating the membrane electrode assembly of claim 1 and configured to produce electric power.

8 . A vehicle incorporating the fuel cell of claim 7 to generate electricity to power the vehicle.

9 . A membrane electrode assembly comprising:
a cathode electrode disposed on one end of the membrane electrode assembly and including:
at least one catalyst layer including:
a plurality of catalyst active material; and
an organic solvent;

an anode electrode disposed on an opposite end of the membrane electrode assembly from the cathode electrode and including:
at least one catalyst layer including:
a plurality of catalyst active material; and
an organic solvent; and

a proton exchange membrane disposed between the cathode electrode and the anode electrode,
wherein the organic solvent is configured to decrease the amount of catalyst active material degradation within the catalyst layer by at least 40% compared to a catalyst layer without the organic solvent and without sacrificing performance of the membrane electrode assembly.

10 . The membrane electrode assembly of claim 9 , wherein the catalyst layer is comprised of carbon supported nanoparticles dispersed with perfluorosulfonic acid ionomer binder.

11 . The membrane electrode assembly of claim 10 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.2 to about 0.8.

12 . The membrane electrode assembly of claim 10 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.4 to about 0.6.

13 . The membrane electrode assembly of claim 10 , wherein a weight ratio of carbon to ionomer within the catalyst layer is about 0.5.

14 . The membrane electrode assembly of claim 9 , wherein the organic solvent is hydrofluoroethers.

15 . The membrane electrode assembly of claim 9 , wherein the organic solvent is a hydrofluoroether including one or more of methyl nonafluorobutyl ether, methyl nonafluoroisobutyl ether, or methyl perfluoropropyl ether.

16 . An electrolyzer incorporating the membrane electrode assembly of claim 9 .

17 . A membrane electrode assembly comprising:
at least one catalyst layer including:
a plurality of catalyst active material; and
a hydrofluoroether, wherein the hydrofluoroether is configured to decrease a surface tension of the catalyst layer compared to a catalyst layer which does not include the hydrofluoroether and configured to decrease the degradation amount of catalyst active material within the catalyst layer by at least 40% without sacrificing performance.

18 . The membrane electrode assembly of claim 17 , wherein the catalyst layer is comprised of carbon supported nanoparticles dispersed with perfluorosulfonic acid ionomer binder.

19 . The membrane electrode assembly of claim 18 , wherein a ratio of carbon to ionomer within the catalyst layer is about 0.2 to about 0.8.

20 . The membrane electrode assembly of claim 18 , wherein a ratio of carbon to ionomer within the catalyst layer is about 0.4 to about 0.6.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Ramaswamy Nagappan
• Kumaraguru Swaminatha P

Classifications

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/881

  Electrolytic membranes · CPC title

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title

• H01M4/926

  on carbon or graphite · CPC title

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title