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:
Dec. 20, 2011
Filed:
Mar. 01, 2006
Yasutaka Kogetsu, Suita, JP;
Masaya Ugaji, Suita, JP;
Keiichi Takahashi, Nishinomiya, JP;
Shinji Mino, Ibaraki, JP;
Nobuaki Nagao, Ohgaki, JP;
Satoshi Shibutani, Hirakata, JP;
Kazuyoshi Honda, Takatsuki, JP;
Yasutaka Kogetsu, Suita, JP;
Masaya Ugaji, Suita, JP;
Keiichi Takahashi, Nishinomiya, JP;
Shinji Mino, Ibaraki, JP;
Nobuaki Nagao, Ohgaki, JP;
Satoshi Shibutani, Hirakata, JP;
Kazuyoshi Honda, Takatsuki, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In order to enhance charge and discharge efficiency and to improve cycle characteristics by increasing a facing area between a positive electrode active material and a negative electrode active material, in a negative electrode for lithium secondary battery having a current collector and an active material layer carried on the current collector, the active material layer includes a plurality of columnar particles. The columnar particles include an element of silicon, and are tilted toward the normal direction of the current collector. Angle θ formed between the columnar particles and the normal direction of the current collector is preferably 10°≦θ<90°.