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. 31, 2004
Filed:
Jan. 04, 2002
Hiroyuki Sakamoto, Katano, JP;
Hidekatsu Izumi, Katano, JP;
Toru Inagaki, Kamakura, JP;
Yoichi Izumi, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In order to provide a positive electrode active material capable of producing an alkaline storage battery having a high discharge voltage and an excellent discharge characteristic and also provide a positive electrode and alkaline storage battery containing thereof, a positive electrode active material for an alkaline storage battery comprising a nickel hydroxide powder is used, in which the nickel hydroxide is a solid solution containing magnesium, the magnesium content in the nickel hydroxide is 2 to 7 mol % of all metallic elements contained in the nickel hydroxide, the tap density of the nickel hydroxide is 1.9 g/cm or more, the half-width of a peak attributed to (101) face near 2&thgr;=37 to 40° in a powder X-ray diffraction pattern of the nickel hydroxide by CuK&agr; radiation is 0.7 to 1.2° and the sulfate ion content in the nickel hydroxide is 0.5 wt % or less.