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:
Sep. 10, 2013
Filed:
Jan. 27, 2011
Kan Kitagawa, Hitachi, JP;
Toyotaka Yuasa, Hitachi, JP;
Tatsuya Tooyama, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
It is an object to provide a cathode for a secondary lithium battery in which adhesiveness and flexibility thereof are simultaneously achieved and the thickness thereof is made large, and the secondary lithium ion battery that has a large capacity and is excellent in safety and cycle life using the cathode. The cathode includes a current collector and a cathode mixture layer formed on the surface of the current collector. The cathode mixture layer is formed by stacking two layers one on another, each of which contains a cathode active material, a conductive material and a binder, and the cathode active material contains a lithium-containing composite oxide that forms a polyanion. Of the two layers, the binder that composes a first layer that is in contact with the current collector contains a polymer formed by polymerizing at least one of monomers consisting of a monomer derived from 1-olefin and a monomer derived from a vinyl compound; and the binder that forms a second layer formed on the first layer contains a fluorine resin.