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:
Jan. 20, 1981
Filed:
May. 25, 1979
Applicant:
Inventors:
Dietrich Sprengel, Kelkheim, DE;
Halbig, Helmut, Kelkheim, DE;
Assignee:
Varta Batterie, A.G., Hanover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 59 ; 429212 ;
Abstract
For oxygen reduction in a battery an auxiliary electrode is provided having two layers, one with hydrophilic characteristics, the other hydrophobic. The hydrophilic layer is preferably of activated carbon bound in plastic and the hydrophobic layer of porous polytetrafluorethylene. Electrical contact is established between a conductor on the outside of the activated carbon layer and the negative main electrode. Preferably the exposed surface of the auxiliary electrode is provided with a metal ion barrier. Also preferably at least two such auxiliary electrodes are provided to make the battery orientation insensitive.