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:
Aug. 03, 2010
Filed:
Mar. 29, 2005
Toshikazu Yoshida, Tokushima, JP;
Maruo Kamino, Tokushima, JP;
Toshikazu Yoshida, Tokushima, JP;
Maruo Kamino, Tokushima, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
A lithium secondary battery includes a negative electrode, a positive electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode current collector () having an irregular surface and a negative electrode active material layer () formed on the surface. In the lithium secondary battery, the negative electrode active material layer () is composed of a material that alloys with Li; thickness of the negative electrode active material layer () (μm)/10-point mean surface roughness Rz of the negative electrode current collector () (μm) is in the range of from 0.5 to 4; and tensile strength of the negative electrode current collector () (N/mm) at 25° C.×the negative electrode current collector base thickness (mm)/thickness of the negative electrode active material layer () (μm) on one side of current collector is 2 or greater.