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:
Jun. 11, 2024
Filed:
Jul. 16, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Yuji Yamamoto, Toyota, JP;
Momoko Procter, Seto, JP;
Yoshinari Makimura, Nisshin, JP;
Tetsutaro Hayashi, Niihama, JP;
Willy Shun Kai Bong, Niihama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA AND, Toyota, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
The present disclosure can bring excellent output characteristics to a nonaqueous electrolyte secondary battery that uses a cathode active material containing tungsten while desired durability is secured. The battery of the present disclosure includes a cathode, an anode, and a nonaqueous electrolyte. The cathode includes a cathode active material layer that contains a granular cathode active material. The cathode active material includes a core part that contains a lithium-transition metal composite oxide of a layered structure; a tungsten-concentrated layer that is formed over a surface of the core part and has a higher tungsten concentration than in the core part; and a lithium-tungsten compound particle that adheres to at least part of a surface of the tungsten-concentrated layer and contains tungsten and lithium. In the battery of the present disclosure, the tungsten-concentrated layer has an amorphous structure. This can bring excellent output characteristics while desired durability is secured.