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:
Jul. 15, 2008
Filed:
Aug. 17, 2004
Gentaro Kano, Fukushima, JP;
Karin Tsuda, Fukushima, JP;
Gentaro Kano, Fukushima, JP;
Karin Tsuda, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
Provided is a battery capable of improving charge-discharge cycle characteristics. The battery comprises a spirally wound electrode body in which a cathode and an anode are spirally wound with a separator in between. The capacity of the anode includes a capacity component by insertion and extraction of Li and a capacity component by precipitation and dissolution of Li metal, and is represented by the sum of them. Moreover, the anode includes a carbon material capable of obtaining a first peak within a range from 1580 cmto 1620 cmand a second peak within a range of 1350 cmto 1370 cmin a Raman spectrum analysis using argon laser light with a wavelength of 5145 nm, and having an intensity ratio IB/IA between the first peak and the second peak of 0.25 to 0.6, where the intensity of the first peak is IA and the intensity of the second peak is IB. Thereby, precipitation-dissolution efficiency of lithium metal and charge-discharge cycle characteristics can be improved.