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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 11367871 B1

PDFFull Text
Date of Patent:
Jun. 21, 2022

Filed:

Sep. 19, 2018

Positive electrode active material for secondary battery and lithium secondary battery including the same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

In Seong Ju, Daejeon, KR;

Wang Mo Jung, Daejeon, KR;

Byung Chun Park, Daejeon, KR;

Joo Hong Jin, Daejeon, KR;

Ju Kyung Shin, Daejeon, KR;

Ji Hye Kim, Daejeon, KR;

So Ra Baek, Daejeon, KR;

Tae Gu Yoo, Daejeon, KR;

Assignee:

LG Energy Solution, Ltd.;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Cynthia H Kelly

Assistant Examiner:

Aaron J Greso

Int. Cl.
CPC ...
H01M 4/505 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/505 (2013.01); H01M 4/366 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract

The present invention provides a positive electrode active material for a secondary battery which includes a lithium transition metal oxide, wherein the positive electrode active material has three peaks in a differential graph (ERC curve) obtained by differentiating a pH value against an amount of acid (HCl) added, which is obtained by pH titration of 10 g of the lithium transition metal oxide using 0.5 M HCl, wherein a y-axis (dpH/dml) value of a first peak at the smallest x-axis value among the three peaks is −1.0 or less.

Find Patent Forward Citations

Ju, In. (2022). Positive electrode active material for secondary battery and lithium secondary battery including the same (U.S. Patent No. 11367871). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11367871

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