Patent · US Expired

Method for the production of membrane electrode assemblies for fuel cells

US7141270B2 · kind B2 · utility

7Cited by

6References

8Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Sandra Wittpahl · Obertshausen, DE
Markus Vogt · Frankfurt am Main, DE
Karl-Anton Starz · Rodenbach, DE
Joachim Köhler · Ortenburg, DE

Key dates

Filing date	Dec 3, 2002
Grant date	Nov 28, 2006
Priority date	—
Expiry date	Aug 27, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to a method for the production of a membrane electrode assembly comprising a polymer electrolyte membrane with two opposing membrane surfaces and a cathode and an anode electrode each comprising a catalyst layer and a gas distribution layer. Each catalyst layer is interposed between a membrane surface and the corresponding gas distribution layer. The catalyst layer of the cathode and/or the catalyst layer of the anode comprise at least two sub-layers. According to the present invention at least one of the sub-layers of the cathode electrode and/or the anode electrode is applied directly to the surface of the membrane while the remaining sub-layers are applied to the corresponding gas distribution layers. Finally the assembly of the coated membrane and the coated gas distribution layers is produced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.