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:
Feb. 26, 2013
Filed:
May. 20, 2009
Isamu Konishiike, Kanagawa, JP;
Kotaro Satori, Kanagawa, JP;
Kenichi Kawase, Fukushima, JP;
Shunsuke Kurasawa, Fukushima, JP;
Koichi Matsumoto, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Masayuki Iwama, Fukushima, JP;
Takashi Fujinaga, Fukushima, JP;
Isamu Konishiike, Kanagawa, JP;
Kotaro Satori, Kanagawa, JP;
Kenichi Kawase, Fukushima, JP;
Shunsuke Kurasawa, Fukushima, JP;
Koichi Matsumoto, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Masayuki Iwama, Fukushima, JP;
Takashi Fujinaga, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A secondary battery having high cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolyte. In the anode, an anode active material layer containing silicon, carbon, and oxygen as an anode active material is provided on an anode current collector. In the anode active material, a content of carbon is from 0.2 atomic % to 10 atomic % both inclusive, and a content of oxygen is from 0.5 atomic % to 40 atomic % both inclusive. A ratio from 0.1% to 17.29% both inclusive of the silicon contained in the anode active material exists as Si—C bond.