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. 02, 2010
Filed:
Dec. 13, 2005
Yasutaka Kogetsu, Suita, JP;
Kazuyoshi Honda, Takatsuki, JP;
Toshitada Sato, Osaka, JP;
Hiroshi Yoshizawa, Hirakata, JP;
Yasutaka Kogetsu, Suita, JP;
Kazuyoshi Honda, Takatsuki, JP;
Toshitada Sato, Osaka, JP;
Hiroshi Yoshizawa, Hirakata, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A negative electrode for a lithium ion secondary battery including a current collector and an active material layer carried on the current collector, wherein the active material layer includes a first layer and a second layer alternately laminated in a thickness direction of the active material layer, and wherein the first layer includes silicon or silicon and a small amount of oxygen and the second layer includes silicon and a larger amount of oxygen than the first layer. With the use of the negative electrode, it is possible to provide a high capacity lithium ion secondary battery having excellent high rate charge/discharge characteristics and superior cycle characteristics.