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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 11228027 B1

PDFFull Text
Date of Patent:
Jan. 18, 2022

Filed:

Jan. 27, 2020

Positive electrode active material for alkaline secondary battery and alkaline secondary battery including the positive electrode active material

Applicants:

Fdk Corporation, Tokyo, JP;

Fujitsu Limited, Kanagawa, JP;

Inventors:

Takeshi Ito, Tokyo, JP;

Yuzo Imoto, Tokyo, JP;

Masaru Kihara, Tokyo, JP;

Takayuki Yano, Tokyo, JP;

Shigekazu Yasuoka, Tokyo, JP;

Shuuichi Doi, Isehara, JP;

Takashi Yamazaki, Kawasaki, JP;

Yuji Kataoka, Yokohama, JP;

Assignees:

FDK CORPORATION, Tokyo, JP;

FUJITSU LIMITED, Kanagawa, JP;

Attorney:

Kinney & Lange, P.A.

Primary Examiner:

Jeremiah R Smith

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/52 (2010.01); H01M 4/32 (2006.01); C01G 53/04 (2006.01); C01G 51/04 (2006.01); H01M 4/50 (2010.01); H01M 10/34 (2006.01); H01M 10/30 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01G 51/04 (2013.01); C01G 53/04 (2013.01); H01M 4/32 (2013.01); H01M 4/50 (2013.01); H01M 4/52 (2013.01); H01M 10/345 (2013.01); C01P 2002/50 (2013.01); C01P 2002/52 (2013.01); C01P 2004/80 (2013.01); H01M 10/30 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0014 (2013.01);
Abstract

A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.

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