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:
Apr. 07, 2015
Filed:
Aug. 19, 2010
Applicants:
Masaomi Yoshida, Tokyo, JP;
Taichi Kimura, Tokyo, JP;
Hideki Kitamura, Tokyo, JP;
Inventors:
Assignee:
Kureha Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 4/13 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/621 (2013.01); H01M 4/623 (2013.01); H01M 4/13 (2013.01); H01M 10/0525 (2013.01);
Abstract
Provided is a process for producing non-aqueous battery electrode-forming binder solutions which includes a step of performing filtration with a filtration accuracy that enables suppressing of the occurrence of internal short circuits (shorts) in non-aqueous batteries such as lithium ion secondary batteries. The process includes a step (A) of filtering a polymer solution of a vinylidene fluoride resin in an organic solvent through a filter membrane (a) that is made of a polyolefin resin and has an initial filtration efficiency of not less than 99.9% for a filtering particle size of 20 μm.