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. 27, 2020
Filed:
May. 01, 2017
Applicant:
Mitsubishi Paper Mills Limited, Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI PAPER MILLS LIMITED, Sumida-Ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01G 11/52 (2013.01); H01G 9/02 (2006.01); H01B 3/48 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1626 (2013.01); H01B 3/48 (2013.01); H01G 9/02 (2013.01); H01G 11/52 (2013.01); H01M 2/16 (2013.01);
Abstract
A separator for electrochemical elements includes beaten solvent-spun cellulose fibers and rayon fibers having a fiber diameter of 9.5 μm or less. More preferably, the separator for electrochemical elements has a content of the rayon fibers relative to all fibers of 10 to 25% by mass, and can be applied to electrochemical elements such as electric double layer capacitors, hybrid capacitors, redox capacitors, and lithium secondary batteries. The separator can provide low internal short circuit failure rates and high surface strength.