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.:
Date of Patent:
Jan. 26, 2021
Filed:
Mar. 31, 2017
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Su-Rim Lee, Daejeon, KR;
Su-Hyun Kim, Daejeon, KR;
Hye-Won Jeong, Daejeon, KR;
Jae-Hyun Lee, Daejeon, KR;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/13 (2010.01); H01M 4/36 (2006.01); H01M 10/42 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/622 (2013.01); H01M 4/13 (2013.01); H01M 4/366 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 10/4235 (2013.01); H01M 2004/028 (2013.01);
Abstract
The present disclosure relates to a cathode including a cathode active material and poly(amic acid). When the lithium secondary battery including the cathode is in an abnormal operation range of 160° C. or higher, condensation reaction of poly(amic acid) occurs to form polyimide. The polyimide surrounds cathode active material particles in the form of a coating film and prevents transport of lithium ions and electrons to interrupt current flow, and inhibits abnormal heat emission and thermal runaway or combustion caused by additional reactions.