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:
Mar. 17, 2020
Filed:
Nov. 10, 2016
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Abstract
An object of the present invention is to reduce the gelation of a positive electrode mixture and to reduce an increase in the resistance of a positive electrode of a sodium ion secondary battery. The invention relates to a sodium ion secondary battery including a positive electrode, a negative electrode, a separator disposed between the positive and negative electrodes, and a sodium-ion-conducting nonaqueous electrolyte. The positive electrode contains positive electrode active material particles, a conductive additive, and a binder. Each positive electrode active material particle includes an oxide particle that absorbs and releases sodium ions and a covering layer covering the oxide particle. The oxide particle contains an oxide A containing Ni and Mn. The covering layer contains at least one material B selected from the group consisting of a ceramic and a carbonaceous material. The binder contains a fluorocarbon resin.