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:
May. 17, 2011
Filed:
Mar. 12, 2007
Takakazu Hirose, Fukushima, JP;
Masayuki Iwama, Fukushima, JP;
Koichi Matsumoto, Fukushima, JP;
Isamu Konishiike, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Masayuki Iwama, Fukushima, JP;
Koichi Matsumoto, Fukushima, JP;
Isamu Konishiike, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Sony Corportion, Tokyo, JP;
Abstract
An anode capable of relaxing the stress concentration and improving the characteristics and a battery using it are provided. The anode includes an anode current collector and an anode active material layer containing silicon (Si) as an element, wherein an anode active material layer has a metal element increasing and decreasing region in which a metal element is contained as an element, and a concentration of the metal element is increased and then decreased in a thickness direction.