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. 10, 2012
Filed:
Jun. 25, 2003
Atsushi Fukui, Tokushima, JP;
Yasuyuki Kusumoto, Kobe, JP;
Mariko Torimae, Kobe, JP;
Hiroshi Nakamura, Kobe, JP;
Atsushi Fukui, Tokushima, JP;
Yasuyuki Kusumoto, Kobe, JP;
Mariko Torimae, Kobe, JP;
Hiroshi Nakamura, Kobe, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A negative electrode for a lithium secondary cell having a collector composed of an electroconductive metal foil and, provided on the surface thereof, an active material layer containing active material particles containing silicon and/or a silicon alloy and a binder, characterized in that the binder has mechanical characteristics of a tensile strength of 50 N/mmor more, an elongation at break of 10% or more, a strain energy density of 2.5×10J/mmor more and a coefficient of elasticity of 10000 N/mmor less, and preferably characterized in that the collector has mechanical characteristics of a tensile strength of 80 N/mmor more, a proportional limit 30 N/mmor more, an elongation at break of 1.0% or more and an elastic elongation limit of 0.03% or more.