Patent · US Expired

Catalyst layer for polymer electrolyte fuel cells

US6156449A · kind A · utility

31Cited by

9References

26Claims

0Family size

Assignee

Degussa-Huels AG · DE

Inventors

Ralf Zuber · Großostheim, DE
Ralf Karch · Kleinostheim, DE
Knut Fehl · Schlüchtern, DE
Karl-Anton Starz · Rodenbach, DE

Key dates

Filing date	Aug 18, 1999
Grant date	Dec 5, 2000
Priority date	—
Expiry date	Aug 18, 2019

Classification

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

Abstract

A catalyst layer on a substrate material which contains a proton-conducting polymer (ionomer), electrically conductive carbon particles and fine particles of at least one precious metal. The catalyst layer is obtainable by coating the substrate material with an ink which contains a dispersion of the carbon particles and at least one organic precious metal complex compound in a solution of the ionomer, and drying the coating below a temperature at which the ionomer or the substrate material is thermally damaged, the precious metals in the complex compounds being present with an oxidation number of 0 and the complex compounds being thermally decomposed during drying to form the fine precious metal particles.

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