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:
Feb. 23, 2021
Filed:
Jan. 06, 2017
Jfe Chemical Corporation, Tokyo, JP;
Tomoyuki Tahara, Tokyo, JP;
JFE CHEMICAL CORPORATION, Tokyo, JP;
Abstract
The present invention provides a Li-ion secondary cell negative-electrode material with which it is possible to adequately suppress reductive decomposition of a liquid electrolyte by an active material during charging, the Li-ion secondary cell negative-electrode material exhibiting a high discharge capacity that exceeds the theoretical capacity of graphite and exceptional initial charging efficiency and cycle characteristics. In this negative-electrode material for a Li-ion secondary cell, the surfaces of particles of SiO(O≤x<2) contain Li and at least one metallic element M selected from among Si, Al, Ti, and Zr, and have a coating of a Li-containing oxide comprising a composition in which M/Li>5 with respect to the molar ratio.