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:
Aug. 26, 2025
Filed:
Mar. 28, 2018
Applicant:
Hitachi Chemical Company, Ltd., Tokyo, JP;
Inventors:
Hideyuki Tsuchiya, Tokyo, JP;
Takashi Sakamoto, Tokyo, JP;
Takeshi Masayoshi, Tokyo, JP;
Kento Hoshi, Tokyo, JP;
Takayuki Miyauchi, Tokyo, JP;
Takashi Kubota, Tokyo, JP;
Assignee:
Resonac Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/133 (2010.01); H01M 4/1393 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/587 (2013.01); H01M 4/0433 (2013.01); H01M 4/133 (2013.01); H01M 4/1393 (2013.01); H01M 4/362 (2013.01); H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract
This negative electrode material for lithium ion secondary batteries has a C of 5.5 or less, C being a value obtained from a formula C=(pressure B−pressure A)/(1.70−1.35), where pressure A (kN/cm) is defined as the pressure at which, when a 3.0 g specimen packed into a column space having a diameter of 15 mm is pressed down at a rate of 10 mm/min, a density of 1.35 g/cmis obtained, and pressure B (kN/cm) is defined as the pressure at which a density of 1.70 g/cmis obtained.