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:
Dec. 24, 2019
Filed:
Jan. 18, 2016
Sanyo Electric Co., Ltd., Daito-shi, Osaka, JP;
Taizou Sunano, Tokushima, JP;
Hiroshi Minami, Hyogo, JP;
Yoshio Kato, Osaka, JP;
Yohei Uchiyama, Hyogo, JP;
SANYO Electric Co., Ltd., Daito-shi, JP;
Abstract
The initial charge/discharge efficiency and cycle characteristics of a non-aqueous electrolyte secondary battery that contains a silicon material as a negative-electrode active material are improved. A negative-electrode active material particle () according to an embodiment includes a lithium silicate phase () represented by LiSiO{0<z<2} and silicon particles () dispersed in the lithium silicate phase (). The silicon particles () have a crystallite size of 40 nm or less. The crystallite size is calculated using the Scherrer equation from the half-width of the diffraction peak of the Si (111) plane in an XRD pattern obtained by XRD measurement of the negative-electrode active material particle