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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 10665856 B1

PDFFull Text
Date of Patent:
May. 26, 2020

Filed:

Jul. 09, 2015

Positive electrode active material, positive electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system

Applicant:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Inventors:

Asuki Yanagihara, Fukushima, JP;

Shingo Nakasato, Fukushima, JP;

Yuki Niwata, Fukushima, JP;

Yosuke Hosoya, Fukushima, JP;

Assignee:

MURATA MANUFACTURING CO., LTD., Kyoto, JP;

Attorney:

Chip Law Group

Primary Examiner:

Olatunji A Godo

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); B60L 53/20 (2019.01); H01M 4/485 (2010.01); H02J 3/14 (2006.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H02J 7/00 (2006.01); H02J 7/35 (2006.01); H02J 3/38 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); B60L 53/20 (2019.02); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H02J 3/14 (2013.01); H02J 7/0068 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01); H02J 3/383 (2013.01); H02J 3/386 (2013.01); H02J 7/0027 (2013.01); H02J 7/35 (2013.01); H02J 2310/14 (2020.01); Y02E 10/563 (2013.01); Y02E 10/763 (2013.01); Y02E 60/122 (2013.01); Y02E 60/721 (2013.01); Y02T 10/7011 (2013.01); Y02T 10/7055 (2013.01); Y02T 10/7072 (2013.01); Y02T 90/127 (2013.01); Y02T 90/14 (2013.01); Y02T 90/168 (2013.01); Y02T 90/169 (2013.01); Y04S 10/126 (2013.01); Y04S 30/12 (2013.01); Y04S 30/14 (2013.01);
Abstract

A positive electrode active material includes secondary particles obtained by aggregation of a plurality of primary particles. The primary particles include, core particles including a lithium composite oxide, and a layer that is provided on surfaces of the core particles and includes a lithium composite oxide. The lithium composite oxide included in the core particles and the lithium composite oxide included in the layer have the same composition or almost the same composition, and crystallinity of the lithium composite oxide included in the layer is lower than crystallinity of the lithium composite oxide included in the core particles.

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