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:
Oct. 05, 2021
Filed:
Dec. 09, 2011
Applicants:
Kiyoshi Kanamura, Hachioji, JP;
Hirokazu Munakata, Hachioji, JP;
Yongcheng Jin, Hachioji, JP;
Inventors:
Assignees:
TOKYO METROPOLITAN UNIVERSITY, Tokyo, JP;
3DOM INC., Sagamihara, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 50/449 (2021.01); H01M 10/052 (2010.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01); H01M 10/42 (2006.01);
U.S. Cl.
CPC ...
H01M 50/449 (2021.01); H01M 10/052 (2013.01); H01M 10/4235 (2013.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01);
Abstract
Provided is a lithium secondary battery separator including a laminate of a substrate and a porous heat-resistant polyimide film which covers at least one surface of the substrate. The porous heat-resistant polyimide film has pores which are regularly arrayed three-dimensionally and a film thickness of 5-20 μm. Penetration damage to the separator by growth of dendrite-shaped lithium is avoided, and it is also possible to meet a request which is demanded of the lithium secondary battery separator.