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:
Jan. 01, 2019
Filed:
Nov. 28, 2014
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Koichiro Watanabe, Annaka, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
Provided is a negative electrode material that is suitable for use in a negative electrode of a lithium ion secondary battery having high capacity and excellent cycle characteristics. Also provided are a negative electrode and a lithium ion secondary battery using the same. The negative electrode material for lithium ion secondary battery comprises a particle that contains silicon and is capable of storing and releasing a lithium ion and that is characterized, in a volume-based distribution as measured with a laser diffraction particle size distribution meter, by (mode diameter—D)/D=0.13 or greater and (D—mode diameter)/D=0.28 or less, where the mode diameter is the most frequent value in the distribution, Dis the diameter at 50% accumulation and Dis the diameter at 90% accumulation.