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:
Jun. 18, 2019
Filed:
Apr. 10, 2017
Applicant:
Celgard, Llc, Charlotte, NC (US);
Inventors:
Zhengming Zhang, Rock Hill, SC (US);
Pankaj Arora, Chesterfield, VA (US);
Assignee:
Celgard, LLC, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); H01M 4/62 (2006.01); H01M 10/058 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 2/1686 (2013.01); H01M 2/145 (2013.01); H01M 2/1653 (2013.01); H01M 2/1673 (2013.01); H01M 4/628 (2013.01); H01M 10/058 (2013.01); H01M 10/0525 (2013.01);
Abstract
A method for preventing oxidation of a polyolefin separator in a lithium ion secondary battery includes the steps of: providing a lithium ion secondary battery having a positive electrode and a polyolefin separator film; and positioning an antioxidative barrier coating between the positive electrode and the polyolefin separator film, the antioxidative barrier coating being made of a polymer having a resistance to oxidation greater than polyethylene.