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:
May. 21, 2024
Filed:
Oct. 29, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A negative electrode active material for non-aqueous electrolyte secondary batteries, including: lithium silicate composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, the lithium silicate phase being an oxide phase including Li, Si, O, and M, where M is an element other than the following elements: Group 1 elements of alkali metals, Group 16 elements of oxygen group, Group 18 elements of rare gas, and Si. An amount of each element relative to a total amount of Li, Si and M in the lithium silicate phase is 3 to 55 mol % for Li, 25 mol % or more for Si, and 3 to 50 mol % for M. A carbon material is present inside the lithium silicate composite particles; and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%.