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. 11, 2020
Filed:
Dec. 07, 2015
Sanyo Electric Co., Ltd., Daito-shi, Osaka, JP;
Hidekazu Tamai, Hyogo, JP;
Taizou Sunano, Tokushima, JP;
SANYO Electric Co., Ltd., Daito-shi, JP;
Abstract
Provided are a positive electrode active material capable of suppressing the reduction in capacity of a battery and the generation of gas during storage at high temperature in a charged state and a nonaqueous electrolyte secondary battery including the positive electrode active material. A positive electrode active material particle () includes a lithium transition metal oxide particle () containing a halogen atom and rare-earth compound particles () attached to the surface of the lithium transition metal oxide particle (). The amount of the halogen atom present on the surface of the lithium transition metal oxide particle () is 5 mass percent or less of the total amount of the halogen atom contained in the lithium transition metal oxide particle (). A rare-earth element making up the rare-earth compound particles () is one other than yttrium and scandium.