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. 05, 2011
Filed:
Oct. 26, 2006
Takeru Yamamoto, Fukushima, JP;
Tomoyuki Nakamura, Fukushima, JP;
Yuji Uchida, Fukushima, JP;
Yukifumi Takeda, Fukushima, JP;
Takehiko Suwa, Fukushima, JP;
Gentaro Kano, Kanagawa, JP;
Takahiro Endo, Fukushima, JP;
Takeru Yamamoto, Fukushima, JP;
Tomoyuki Nakamura, Fukushima, JP;
Yuji Uchida, Fukushima, JP;
Yukifumi Takeda, Fukushima, JP;
Takehiko Suwa, Fukushima, JP;
Gentaro Kano, Kanagawa, JP;
Takahiro Endo, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery capable of obtaining a high capacity and reducing its expansion is provided. A spirally wound electrode body formed through laminating a cathode and an anode with a separator and an electrolyte in between to form a laminate and spirally winding the laminate is included in a package member made of an aluminum laminate film. An anode active material layer includes an agglomerated graphite material in which a plurality of primary particles made of graphite having fine pores are agglomerated so that the orientation planes thereof are not parallel to each other, at least in part, to form secondary particles. In the agglomerated graphite material, the total volume of fine pores with a diameter from 10 nm to 1×10nm inclusive estimated by mercury porosimetry ranges from 0.5 cm/g to 1.5 cm/g inclusive per unit weight.