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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 9099736 B1

PDFFull Text
Date of Patent:
Aug. 04, 2015

Filed:

Apr. 05, 2013

High-capacity cathode active material and lithium secondary battery including the same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Song Taek Oh, Daejeon, KR;

Jung Hwan Park, Daejeon, KR;

Su Hwan Kim, Daejeon, KR;

Geun Chang Chung, Daejeon, KR;

Assignee:

LG Chem, Ltd., , KR;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Patrick Ryan

Assistant Examiner:

Jose Colucci Rios

Int. Cl.
CPC ...
H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/62 (2006.01); C01G 45/12 (2006.01); C01G 49/00 (2006.01); C01G 51/00 (2006.01); C01G 53/00 (2006.01); H01M 4/64 (2006.01); H01M 10/052 (2010.01); H01M 4/587 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01G 45/1228 (2013.01); C01G 49/009 (2013.01); C01G 51/50 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/625 (2013.01); H01M 4/64 (2013.01); C01P 2006/40 (2013.01); H01M 4/0404 (2013.01); H01M 4/131 (2013.01); H01M 4/364 (2013.01); H01M 4/587 (2013.01); H01M 10/052 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01);
Abstract

Provided is a cathode active material including lithium manganese-based oxide, wherein the lithium manganese-based oxide has a layered crystal structure, has a content of manganese (Mn) greater than contents of other transition metal(s), includes 1 mole or more of lithium (Li) with respect to 1 mole of lithium transition metal oxide, has a plateau potential range in which lithium deintercalation as well as oxygen release occurs during initial charging in a high voltage range of 4.4 V or more, has domains included in the layered crystal structure exhibiting electrochemical activity due to a structural change in a potential range of 3.5 V or less after the initial charging, and includes conductive materials for improving electrical conductivity of the lithium manganese-based oxide in a potential range of 3.5 V or less after the initial charging.

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