Patent · US Expired

Membrane-electrode unit for polymer electrolyte fuel cells and processes for their preparation

US6309772A · kind A · utility

43Cited by

6References

29Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Ralf Zuber · Großostheim, DE
Knut Fehl · Schlüchtern, DE
Karl-Anton Starz · Rodenbach, DE
Udo Stenke · Mainaschaff, DE

Key dates

Filing date	Mar 22, 1999
Grant date	Oct 30, 2001
Priority date	—
Expiry date	Mar 22, 2019

Classification

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

Abstract

A membrane-electrode unit for polymer-electrolyte fuel cells. The membrane-electrode unit consists of a polymer electrolyte membrane and porous reaction layers applied to both sides comprising a catalyst and a proton-conducting polymer, a so-called ionomer. The membrane-electrode unit is characterized in that one part A1 of the catalyst of the reaction layers is saturated with the ionomer and is embedded in the ionomer whereas one part A2 of the catalyst is kept free from the ionomer, where the parts A1 and A2 are in a weight ratio of 1:1 to 20:1.

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