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:
Dec. 01, 2015
Filed:
Mar. 29, 2013
Tokyo Ohka Kogyo Co., Ltd., Kawasaki-shi, JP;
Kaoru Ishikawa, Kawasaki, JP;
Takahiro Asai, Kawasaki, JP;
TOKYO OHKA KOGYO CO., LTD., Kawasaki Shi, JP;
Abstract
An object of the present invention is to provide a negative electrode for a lithium ion secondary battery, capable of obtaining a lithium ion secondary battery which is excellent in initial charge characteristics and is also excellent in charge/discharge cycle characteristics, and a method for producing the same, as well as a lithium ion secondary battery comprising the negative electrode for a lithium ion secondary battery. A negative electrode for a lithium ion secondary battery according to the present invention comprises a current collector layer, and a negative electrode active material layer composed of a tin structure, the tin structure includes a plurality of protrusions which protrude approximately perpendicularly to a main surface of the current collector layer, and a cross-sectional area of the tip portion parallel to the main surface of the current collector layer of the protrusion is smaller than that of the base end portion.