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. 18, 2014
Filed:
Jun. 29, 2012
Takaaki Suzuki, Kasama, JP;
Etsuko Nishimura, Hitachiota, JP;
Toshio Abe, Naka-gun, JP;
Chieko Araki, Hitachi, JP;
Takaaki Suzuki, Kasama, JP;
Etsuko Nishimura, Hitachiota, JP;
Toshio Abe, Naka-gun, JP;
Chieko Araki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electrode for a lithium-ion secondary battery includes a collector of copper or the like, an electrode material layer being form on one surface and both surfaces of the collector and including an active material and a binder, and a binder-rich layer being formed in a dot shape or a stripe shape with a predetermined interval in the interface between the collector and the electrode material layer and having a binder concentration higher than that of the electrode material layer. Accordingly, a concentration gradient of the binder is provided to the surface of the collector. By arranging the binder-rich layer at a predetermined interval, it is possible to improve the adhesiveness between the collector and the electrode material layer due to an anchor effect and to guarantee conductivity between the collector and the electrode material layer.