US 2011/0236800 A1Published application

Method for manufacturing membrane electrode assembly

AssigneeCanon Kabushiki Kaisha

InventorsMakoto Kubota, Motokazu Kobayashi, Keiko Abe

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Abstract

A membrane electrode assembly composed of a polymer electrolyte membrane and diffusion layers bonded to both surfaces of the polymer electrolyte membrane, as well as a polymer electrolyte fuel cell including the membrane electrode assembly, are provided. The polymer electrolyte membrane includes a porous polymer membrane, proton conductive groups disposed in pores of the porous polymer membrane, and a catalyst-supporting conductive material embedded in the pores at least in the neighborhood of at least one surface of the porous polymer membrane. A method for forming the assembly and a polymer electrolyte fuel cell including the assembly are also provided.

Claims1

Dependent claims

A method for manufacturing a membrane electrode assembly, comprising the steps of:

bringing a functional compound comprising a sulfonic group and/or a compound comprising a phosphoric group into contact with pore portions of a porous polymer membrane;
chemically bonding the porous polymer membrane and the functional compound together by electron beam irradiation;
removing excess functional compounds present in a neighborhood of surfaces of the porous polymer membrane;
applying a precursor paste of a catalyst-supporting conductive material to the neighborhood of the surfaces of the porous polymer membrane;
affixing diffusion layers to the surfaces to which the precursor paste has been applied;
and
drying the paste after diffusion layers are affixed to the surfaces of the paste.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/153,052Filed 3 Jun 2011
Priority: JP 2005-0579962 Mar 2005
Published: 29 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01M 4/881
Supports for the deposition of the catalytic active composition: electrolytic membranes
H01M 4/8605
Inert electrodes with catalytic activity, e.g. for fuel cells: porous electrodes
H01M 8/1004
Fuel cells with solid electrolytes: characterised by membrane-electrode assemblies [MEA]
H01M 4/921
Metals of platinum group: alloys or mixtures with metallic elements

Family

Application11/357,047Division · filed 21 Feb 2006
Application13/153,052Division
US 2006/0199069 A1Published application
US 2011/0236800 A1This patent

From the US filing history. Foreign family members aren’t listed.

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