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. 22, 2025
Filed:
Dec. 06, 2022
Applicant:
Kuraray Co., Ltd., Kurashiki, JP;
Inventors:
Junji Fujioka, Kurashiki, JP;
Jun-Sang Cho, Kurashiki, JP;
Taketoshi Okuno, Kurashiki, JP;
Hideharu Iwasaki, Kurashiki, JP;
Assignee:
KURARAY CO., LTD., Kurashiki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/525 (2010.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01); H01M 10/058 (2010.01);
U.S. Cl.
CPC ...
H01M 4/587 (2013.01); H01M 4/133 (2013.01); H01M 4/525 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01); H01M 10/058 (2013.01); H01M 2004/021 (2013.01); Y02E 60/10 (2013.01); Y02T 10/70 (2013.01);
Abstract
A hardly graphitizable carbonaceous material can be used in a negative electrode material for nonaqueous electrolyte secondary batteries (for example, a lithium ion battery) having not only high charge capacity but also high charge-discharge efficiency and being fully charged to be used and a method for producing the same. Such hardly graphitizable carbonaceous material may have an oxygen element content of 0.25% by mass or less.