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:
Jun. 22, 2021
Filed:
Aug. 27, 2015
Sanyo Electric Co., Ltd., Daito, JP;
Hiroshi Minami, Hyogo, JP;
Kouhei Tuduki, Hyogo, JP;
Atsushi Fukui, Hyogo, JP;
Taizou Sunano, Tokushima, JP;
Yoshio Kato, Osaka, JP;
SANYO ELECTRIC CO., LTD., Daito, JP;
Abstract
In a nonaqueous electrolyte secondary battery containing a silicon material as a negative electrode active material, the initial charge-discharge efficiency is improved. Negative electrode active material particles () according to an embodiment each contain a lithium silicate phase () represented by LiSiO(where 0<z<2) and silicon particles () dispersed in the lithium silicate phase (). In base particles () each containing the lithium silicate phase () and the silicon particles (), preferably, a peak originating from SiOis not observed at 2θ=25° in an XRD pattern obtained by XRD measurement of the particles.