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:
Apr. 16, 2024
Filed:
Sep. 25, 2019
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Takumi Matsuno, Annaka, JP;
Hidekazu Awano, Takasaki, JP;
Takakazu Hirose, Annaka, JP;
Kohta Takahashi, Takasaki, JP;
Yusuke Osawa, Annaka, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles, including silicon compound particles each containing a silicon compound (SiO: 0.5≤x≤1.6) and at least one or more of LiSiOand LiSiO, the material includes a phosphate, the negative electrode active material particles each have a surface containing lithium element, and a ratio m/msatisfies 0.02≤m/m≤3, where mrepresents a molar quantity of the lithium element and contained per unit mass of the particles, and mrepresents a molar quantity of phosphorus element contained per unit mass of the particles. Thereby, a negative electrode active material is capable of stabilizing an aqueous negative electrode slurry prepared in producing a negative electrode of a secondary battery, and capable of improving initial charge-discharge characteristics when the negative electrode active material is used for a secondary battery.