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. 25, 2012
Filed:
Apr. 11, 2008
Masaki Hasegawa, Osaka, JP;
Masaya Ugaji, Osaka, JP;
Keisuke Ohara, Osaka, JP;
Hitoshi Matsumoto, Wakayama, JP;
Masaki Hasegawa, Osaka, JP;
Masaya Ugaji, Osaka, JP;
Keisuke Ohara, Osaka, JP;
Hitoshi Matsumoto, Wakayama, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A negative electrode for a lithium secondary battery according to the present invention includes a current collector, and an active material layerformed on the current collector. The active material layerincludes a plurality of negative-electrode active material membersdisposed on the current collector. Each negative-electrode active material memberis oxide, including a first regionof a relatively high oxygen concentration and a plurality of second regionshaving an oxygen concentration which is lower than that of the first region. The first regionextends from a bottom face of each negative-electrode active material memberin a direction away from the surface of the current collector. The plurality of second regionsare alternately disposed on both sides of the first region