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:
Aug. 13, 2019
Filed:
Jan. 05, 2015
Applicant:
Exergy Power Systems, Inc., Tokyo, JP;
Inventor:
Kaduo Tsutsumi, Tokyo, JP;
Assignee:
EXERGY POWER SYSTEMS, INC., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 10/34 (2006.01); H01M 10/24 (2006.01); H01M 2/16 (2006.01); H01M 4/32 (2006.01); H01M 4/38 (2006.01); H01M 4/24 (2006.01);
U.S. Cl.
CPC ...
H01M 4/625 (2013.01); H01M 2/162 (2013.01); H01M 4/32 (2013.01); H01M 4/622 (2013.01); H01M 10/24 (2013.01); H01M 10/34 (2013.01); H01M 10/345 (2013.01); H01M 4/242 (2013.01); H01M 4/383 (2013.01);
Abstract
Carbon or cobalt, which is used as a conductive agent in an electrode of an alkaline secondary cell, is oxidized by oxygen generated from a positive electrode. The conductive agent degraded by oxidization loses its conductivity through repetitive charge and discharge, resulting in shortening of the cycle life of the cell. In an alkaline secondary cell filled with hydrogen, hydrogen generated from a positive electrode is bound to the hydrogen. This prevents a conductive agent in an electrode from being degraded by oxidization. A cell with excellent cycle life characteristic is thus provided.