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:
Jan. 09, 2018
Filed:
Jul. 31, 2015
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/10 (2006.01); H01M 2/16 (2006.01); B32B 5/32 (2006.01); B32B 27/32 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1686 (2013.01); B32B 5/32 (2013.01); B32B 27/32 (2013.01); H01M 2/166 (2013.01); H01M 2/1653 (2013.01); B32B 2457/10 (2013.01);
Abstract
In a porous layer of the present invention, in a case where the porous layer is divided into 32 sections, a degree of variability in voidage that is measured in the 32 sections is 16.0% or lower. Each of the 32 sections is a rectangular parallelepiped whose longitudinal length is 2.3 μm, transverse length is 2.3 μm, and thickness is identical with that of the porous layer. The porous layer of the present invention and a separator formed by laminating the porous layer are suitable as a member for a non-aqueous electrolyte secondary battery that has an excellent cycle characteristic.