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. 08, 2014
Filed:
Jun. 29, 2007
Atsushi Fukui, Moriguchi, JP;
Hiroshi Minami, Moriguchi, JP;
Mariko Torimae, Moriguchi, JP;
Yasuyuki Kusumoto, Moriguchi, JP;
Atsushi Fukui, Moriguchi, JP;
Hiroshi Minami, Moriguchi, JP;
Mariko Torimae, Moriguchi, JP;
Yasuyuki Kusumoto, Moriguchi, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
A lithium secondary battery includes an electrode assembly having a positive electrode (), a negative electrode () having a negative electrode current collector and a negative electrode active material layer formed on a surface of the negative electrode current collector and composed of a binder and negative electrode active material particles containing silicon and/or a silicon alloy, and a separator () interposed between the electrodes. The electrode assembly is impregnated with a non-aqueous electrolyte. The binder contains a polyimide resin represented by the following chemical formula (1): where R contains at least a benzene ring, and n is within the range of from 10 to 100,000, and the negative electrode active material particles have an average particle size of 5 μm or greater.