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:
Jul. 31, 2001
Filed:
Mar. 12, 1999
Masayoshi Hiruma, Yokohama, JP;
Naomi Bando, Kawasaki, JP;
Kunihiko Miyamoto, Tokyo, JP;
Makoto Wakabayashi, Narashino, JP;
Toshiba Battery Co., Ltd., Tokyo, JP;
Abstract
The present invention is to provide a production method of an active material for an alkaline secondary battery comprising: a step of mixing particles comprising particles mainly containing nickel hydroxide and particles of a metal cobalt or a cobalt compound in a mixer with a sealed structure comprising a heating means in the presence of oxygen and an alkaline aqueous solution while heating. An active material produced by the method allows a high utilization. And a battery assembled with a positive electrode using the active material has an excellent high ratio discharge characteristic, and hardly causes the capacity decline even at the time of recharging after leaving in the over discharge state for a long time.