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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 10833369 B1

PDFFull Text
Date of Patent:
Nov. 10, 2020

Filed:

Oct. 31, 2016

Positive electrode active substance for lithium secondary battery, positive electrode for lithium secondary battery and lithium secondary battery, and methods for producing these

Applicant:

Nec Corporation, Tokyo, JP;

Inventors:

Katsumi Maeda, Tokyo, JP;

Sadanori Hattori, Tokyo, JP;

Assignee:

NEC CORPORATION, Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Anca Eoff

Int. Cl.
CPC ...
H01M 10/058 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0569 (2010.01); H01M 4/58 (2010.01); H01M 10/0585 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/583 (2010.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 10/058 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/58 (2013.01); H01M 4/583 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 10/0585 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01);
Abstract

An object of the present invention is to provide a positive electrode active substance capable of suppressing gas generation associated with charge and discharge in a lithium secondary battery, and capable of suppressing gas generation associated with charge and discharge particularly even in cases where the use voltage of the lithium secondary battery is high, a positive electrode and a lithium secondary battery using the positive electrode active substance, and methods for producing these. The present invention is a positive electrode active substance for a lithium secondary battery, comprising a coated positive electrode active substance wherein a surface of a positive electrode active substance is directly coated with lithium metaphosphate.

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