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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.:

US 9276258 B1

PDFFull Text
Date of Patent:
Mar. 01, 2016

Filed:

Jul. 15, 2005

Positive electrode active material for alkaline storage battery, positive electrode for alkaline storage battery, alkaline storage battery, and method for manufacturing positive electrode active material for alkaline storage battery

Applicants:

Hiroyuki Sakamoto, Toyohashi, JP;

Kazuhiro Ohkawa, Kosai, JP;

Shinichi Yuasa, Kyotanabe, JP;

Inventors:

Hiroyuki Sakamoto, Toyohashi, JP;

Kazuhiro Ohkawa, Kosai, JP;

Shinichi Yuasa, Kyotanabe, JP;

Assignee:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Barbara Gilliam

Assistant Examiner:

Adam A Arciero

Int. Cl.
CPC ...
H01M 4/32 (2006.01); B05D 5/12 (2006.01); C01G 53/00 (2006.01); H01M 4/04 (2006.01); H01M 4/26 (2006.01); H01M 4/36 (2006.01); H01M 4/52 (2010.01); H01M 10/30 (2006.01); C01G 51/04 (2006.01); C01G 53/04 (2006.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 10/34 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/32 (2013.01); C01G 51/04 (2013.01); C01G 53/006 (2013.01); C01G 53/04 (2013.01); H01M 4/0497 (2013.01); H01M 4/26 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/52 (2013.01); H01M 10/30 (2013.01); C01P 2002/54 (2013.01); C01P 2002/72 (2013.01); C01P 2004/61 (2013.01); C01P 2004/80 (2013.01); C01P 2004/82 (2013.01); C01P 2004/84 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 4/383 (2013.01); H01M 4/62 (2013.01); H01M 10/345 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0014 (2013.01); Y02E 60/124 (2013.01);
Abstract

There are provided a positive electrode active material for an alkaline storage battery, a positive electrode for an alkaline storage battery, and an alkaline storage battery each of which has an excellent output characteristics and also has an excellent self-discharge characteristic and an excellent cycle lifetime characteristic. The positive electrode active material for an alkaline storage battery according to the present invention has nickel hydroxide particles each containing at least magnesium in a solid solution state and a cobalt compound layer coating the surface of each of the nickel hydroxide particles. Among them, the cobalt compound layer contains cobalt having an average valence of not less than 2.6 and not more than 3.0 and also contains sodium at a proportion of less than 0.10 wt % to the total weight of the cobalt compound layer. The positive electrode active material for an alkaline storage battery according to the present invention has a conductivity smaller than 1.0×10S/cm in a state pressurized at 39.2 MPa.

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