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:
Nov. 07, 2023
Filed:
Feb. 07, 2019
Sanyo Electric Co., Ltd., Daito, JP;
Masahiro Kinoshita, Tokushima, JP;
Kaoru Nagata, Osaka, JP;
PANASONIC ENERGY CO., LTD., Osaka, JP;
Abstract
An object of the present disclosure is to provide a nonaqueous electrolyte secondary battery that can suppress lowering in capacity due to high-temperature storage of the battery. The nonaqueous electrolyte secondary battery () includes: a positive electrode () containing one or more positive electrode active materials; a negative electrode (); and a nonaqueous electrolyte containing a fluorine compound, where: the positive electrode active materials include a complex oxide A containing Li, Ni, and W and a complex oxide B containing Li, Ni, and W as an optional element; W content in the complex oxide A is 5 mol % or more; W content in the complex oxide B is 0.5 mol % or less; and a mass ratio of the complex oxide A is 0.002% or more and 0.1% or less relative to the total of the complex oxide A and the complex oxide B.