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:
Feb. 27, 2007
Filed:
Nov. 06, 2001
Detlef Stolten, Aachen, DE;
Hendrik Dohle, Stolberg, DE;
Jürgen Mergel, Jülich, DE;
Helmut Baltruschat, Bonn, DE;
Detlef Stolten, Aachen, DE;
Hendrik Dohle, Stolberg, DE;
Jürgen Mergel, Jülich, DE;
Helmut Baltruschat, Bonn, DE;
Forschungszentrum Julich GmbH, Julich, DE;
Abstract
In a direct-methanol fuel cell stack with an at least partial circulation () of the fuel, according to the invention a means is arranged in this circulation for reducing the concentration of an undesired byproduct. This means is comprised especially of a further electrochemical cell () to which electric current is applied and which at least partly transforms the byproducts by an electrochemical reduction reaction again to methanol and water. Since the concentration of byproducts is small, the loss in electric current required for the additional reduction reaction has no noticeable effect on the efficiency of the fuel cell stack.