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:
May. 14, 2024
Filed:
Aug. 22, 2019
Applicant:
Jx Nippon Mining & Metals Corporation, Tokyo, JP;
Inventor:
Katsuhiro Kudo, Kanagawa, JP;
Assignee:
JX Metals Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/66 (2006.01); B21B 1/40 (2006.01); B21B 3/00 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/667 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); B21B 1/40 (2013.01); B21B 2003/005 (2013.01); H01M 2004/027 (2013.01);
Abstract
Provided is a rolled copper foil for a lithium ion battery current collector, which has good adhesion to a negative electrode active material, generates less metal powder during ultrasonic welding, and has a rust prevention property. In the rolled copper foil for a lithium ion battery current collector, a surface of the copper foil has a BTA film, the BTA film has a thickness of 0.6 nm or more and 4.6 nm or less, and the rolled copper foil satisfies the following relationships: 40≤wet tension [mN]/m]+thickness of BTA film [nm]×10≤80; 0.01≤arithmetic average roughness Ra [μm]≤0.25; and wet tension [mN/m]≥35.