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:
Oct. 06, 2026
Filed:
Sep. 15, 2022
Applicant:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Inventors:
Masanori Harata, Kariya, JP;
Kazuhiro Niimura, Kariya, JP;
Kota Urabe, Kariya, JP;
Yasuhiro Yamaguchi, Kariya, JP;
Tatsuya Eguchi, Kariya, JP;
Mitsutoshi Otaki, Susono, JP;
Jun Yoshida, Mishima, JP;
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/38 (2006.01); C01B 33/021 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/386 (2013.01); C01B 33/021 (2013.01); H01M 4/381 (2013.01); C01P 2002/72 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract
A method for manufacturing a negative electrode active material includes: an alloying step of causing an Na source and an Si source to react to produce an Na—Si alloy containing Na and Si; and a silicon clathrate production step of heating the Na—Si alloy and reducing an amount of Na in the Na—Si alloy to produce a type-II silicon clathrate. Porous Si with a BET specific surface area of 20 m/g or more is used as the Si source.