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:
Jun. 17, 2025
Filed:
Dec. 01, 2020
Jfe Chemical Corporation, Tokyo, JP;
Ryuta Haga, Tokyo, JP;
Tetsuo Shiode, Tokyo, JP;
JFE CHEMICAL CORPORATION, Tokyo, JP;
Abstract
Provided is a carbon material for a negative electrode of a lithium ion secondary battery, which has a small particle diameter, high initial charge-discharge efficiency, and a high 2 C discharge rate, and achieves both input-output characteristics and durability. Disclosed is a carbon material for a negative electrode of a lithium ion secondary battery, in which a 50% by volume particle diameter in a cumulative frequency distribution is 1.0 μm or more and less than 5.0 μm, a specific surface area by a BET method is 6.5 m/g or less, a tap density (D) is 0.70 g/cmor more, and a Raman R value obtained by Raman spectroscopy is more than 0.100 and less than 0.300, and the carbon material has a carbonaceous film on a surface of graphitized material particles of a mesophase microbead.