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. 21, 2003
Filed:
May. 22, 2001
Applicant:
Inventors:
Francisco A. Uribe, Los Alamos, NM (US);
Thomas Zawodzinski, Los Alamos, NM (US);
Assignee:
The Regents of the University of California, Los Alamos, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/00 ;
U.S. Cl.
CPC ...
H01M 8/00 ;
Abstract
A method is provided for operating a fuel cell at high voltage for sustained periods of time. The cathode is switched to an output load effective to reduce the cell voltage at a pulse width effective to reverse performance degradation from OH adsorption onto cathode catalyst surfaces. The voltage is stepped to a value of less than about 0.6 V to obtain the improved and sustained performance.