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:
Apr. 20, 2010
Filed:
Nov. 18, 2005
Isamu Konishiike, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Kensuke Yamamoto, Fukushima, JP;
Yukiko Iijima, Fukushima, JP;
Tomoo Takada, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Isamu Konishiike, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Kensuke Yamamoto, Fukushima, JP;
Yukiko Iijima, Fukushima, JP;
Tomoo Takada, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery capable of improving cycle characteristics is provided. An anode active material layer is formed by a vapor phase method, and includes Si as an element. In the anode active material layer, a plurality of primary particles formed by growth in a thickness direction are included, and the plurality of primary particles are agglomerated to form a plurality of secondary particles. Each secondary particle is separated by a groove formed by charge and discharge, and some of primary particles are split particles split by the groove. The average number of the split particles per secondary particle in 5 or more adjacent secondary particles is 10 or more. Moreover, the primary particles and the secondary particles are inclined to the same side.