Substrate film for use in catalyst transfer film and method for producing the same, method for producing catalyst transfer film, and catalyst coated membrane

Patent metadata

Field	Value
Publication number	US-2016013496-A1
Application number	US-201514860163-A
Country	US
Kind code	A1
Filing date	Sep 21, 2015
Priority date	Mar 22, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A substrate film for use in a catalyst transfer film is provided. The substrate film is used in a catalyst transfer film that has the substrate film and a catalyst layer formed of a catalyst ink on one surface of the substrate film, the catalyst transfer film transferring the catalyst layer to a solid polymer electrolyte membrane. The substrate film for use in a catalyst transfer film is provided with a marginal edge layer formed of a surface treatment material having no affinity for the catalyst ink, in an area of a marginal edge of a target area that is set in advance for forming a target pattern of the catalyst layer.

First claim

What is claimed is:

1 . A substrate film for use in a catalyst transfer film, comprising:
a substrate film; a catalyst layer formed by a catalyst ink on one surface of the substrate film; and, a catalyst transfer film for transferring the catalyst layer to a solid polymer electrolyte membrane, having a marginal edge layer formed of a surface treatment material having no affinity for the catalyst ink and being provided along at least a portion of a marginal edge of a target area that is set in advance for forming the catalyst layer into a target pattern.

2 . The substrate film for use in a catalyst transfer film of claim 1 , wherein the surface treatment material is a water-repellent surface treatment material.

3 . The substrate film for use in a catalyst transfer film of claim 2 , wherein the water-repellent surface treatment material is a silane coupling agent.

4 . The substrate film for use in a catalyst transfer film of claim 2 , wherein the target area has a water contact angle of not more than 15 degrees, while the marginal edge area has a water contact angle of not less than 100 degrees.

5 . A method for producing a substrate film for use in a catalyst transfer film having the substrate film and a catalyst layer formed by a catalyst ink on one surface of the substrate film, the catalyst transfer film transferring the catalyst layer to a solid polymer electrolyte membrane, characterized in that the method comprises:
a target area forming step of coating a surface treatment material, which has no affinity for the catalyst ink, throughout one surface of the substrate film, followed by removing the surface treatment material on a target area that is set in advance for forming the catalyst layer into a target pattern.

6 . The method for producing a substrate film for use in a catalyst transfer film of claim 5 , wherein the target area forming step uses, as a method of removing the surface treatment material, a method of applying vacuum-ultraviolet light onto the one surface via a photomask having a surface that is formed with a pattern which is the same as the target pattern.

7 . A method for producing a catalyst transfer film, comprising the steps of, producing a substrate film by the method of claim 5 , and forming a catalyst layer of a catalyst ink, including a dropping step of dropping the catalyst ink onto the target area.

8 . The method for producing a catalyst transfer film of claim 7 , further comprising a removing step of removing a surface treatment material on an area of a marginal edge of the target area.

9 . The method for producing a catalyst transfer film of claim 8 , wherein the removing step uses, as a method of removing the surface treatment material, a method of applying vacuum-ultraviolet light onto the marginal edge area.

10 . A catalyst coated membrane comprising a catalyst layer for use as an electrode to a solid polymer electrolyte membrane, having a catalyst transfer film that is produced by the method of claim 7 .

11 . The catalyst coated membrane of claim 10 , wherein a distance of not more than 2.0 μm is provided between an outermost position and an innermost position in a marginal edge portion of the catalyst layer that is formed on at least one surface of the solid polymer electrolyte membrane.

Assignees

• Toppan Printing Co Ltd

Inventors

• Sakurada Yu

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/8814 Primary

  Temporary supports, e.g. decal · CPC title

• H01M8/1023

  having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes · CPC title

• H01M4/926 Primary

  on carbon or graphite · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title