Porous electrode for proton-exchange membrane

Patent metadata

Field	Value
Publication number	US-2017044678-A1
Application number	US-201615333322-A
Country	US
Kind code	A1
Filing date	Oct 25, 2016
Priority date	Jan 6, 2012
Publication date	Feb 16, 2017
Grant date	—

Abstract

A process for manufacturing a catalytic electrode includes depositing an electrocatalytic ink on a carrier, wherein the electrocatalytic ink includes an electrocatalytic material and a product polymerizable into a protonically conductive polymer. The process also includes solidifying the electrocatalytic ink so as to form an electrode wherein the composition of the product polymerizable into a protonically conductive polymer and its proportion in the ink is defined so that the electrode formed has a breaking strength greater than 1 MPa. The process further includes separating the electrode formed from the carrier.

First claim

1 . A manufacture comprising an electrochemical cell, wherein said electrochemical cell comprises a proton-exchange membrane, a conductive current collector, and an electrode, wherein said electrode is inserted between said proton-exchange membrane and said current collector, wherein said electrode comprises a protonically conductive polymer and an electrocatalytic material, wherein said electrode has a breaking strength that is greater than 1 MPa, and wherein said electrode has an area of which at least 95% is not mechanically bonded to said conductive current collector and not mechanically bonded to said proton-exchange membrane.

2 . The manufacture of claim 1 , wherein said electrode comprises methylcellulose, wherein said methylcellulose is present in a proportion by weight of between 2 and 10.5%.

3 . The manufacture of claim 1 , wherein said electrode comprises a carrier, wherein said electrocatalytic material is deposited on said carrier, and wherein said carrier has a roughness lower than 5 five micrometers.

4 . The manufacture of claim 1 , further comprising an ink that comprises a polymerizable product, wherein said polymerizable product is polymerizable into a protonically conductive polymer, and wherein as a result of a ratio in which said polymerizable product is present, said electrode has a porosity of between 20% and 40%.

5 . The manufacture of claim 1 , further comprising electrocatalytic ink, wherein said electrocatalytic ink comprises solid content, wherein said solid content comprises said electrocatalytic material, and wherein said electrocatalytic material comprises between 60% and 75% of said solid content by weight.

Assignees

• Commissariat Energie Atomique

Inventors

• Vincent Remi
• Mayousse Eric

Classifications

• H01M4/8814

  Temporary supports, e.g. decal · CPC title

• H01M4/8668

  Binders · CPC title

• Y10T29/49117

  Conductor or circuit manufacturing · CPC title

• Y10T29/49115

  including coating or impregnating · CPC title

• H01M4/8605

  Porous electrodes · CPC title