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:
Nov. 23, 2021
Filed:
Aug. 25, 2017
Microporous membrane, lithium ion secondary battery and method of producing the microporous membrane
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventor:
Takeshi Ishihara, Nasushiobara, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 50/403 (2021.01); C08J 9/00 (2006.01); C08J 9/26 (2006.01); H01M 50/44 (2021.01); H01M 50/409 (2021.01); H01M 50/411 (2021.01); H01M 10/04 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 50/403 (2021.01); C08J 9/00 (2013.01); C08J 9/26 (2013.01); H01M 10/0486 (2013.01); H01M 10/0525 (2013.01); H01M 50/409 (2021.01); H01M 50/411 (2021.01); H01M 50/44 (2021.01);
Abstract
A microporous membrane has average membrane thickness of 15 μm or less, and relative impedance A after a heat compression treatment under a pressure of 4.0 MPa at 80° C. for 10 minutes of 140% or less, the relative impedance A being obtained by the equation below: Relative impedance A=(impedance measured at 80° C. after the heat compression treatment)/(impedance measured at room temperature prior to the heat compression treatment)×100.
Quick Actions:
Ishihara, Takeshi. (2021). Microporous membrane, lithium ion secondary battery and method of producing the microporous membrane (U.S. Patent No. 11183734). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11183734
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