The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2001
Filed:
Mar. 22, 1999
Applicant:
Inventors:
Ralf Zuber, Grossostheim, DE;
Knut Fehl, Schlüchtern, DE;
Karl-Anton Starz, Rodenbach, DE;
Udo Stenke, Mainaschaff, DE;
Assignee:
Degussa AG, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/10 ;
U.S. Cl.
CPC ...
H01M 8/10 ;
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 A,of the catalyst of the reaction layers is saturated with the ionomer and is embedded in the ionomer whereas one part A,of the catalyst is kept free from the ionomer, where the parts A,and A,are in a weight ratio of 1:1 to 20:1.