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:
Apr. 23, 2024
Filed:
Jul. 10, 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, Toyota, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A non-aqueous electrolyte secondary battery that has a low initial resistance and an increase in resistance after charging and discharging is suppressed. The secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer, which contains a lithium composite oxide having a layered structure. The lithium composite oxide is a porous particle. A surface of the porous particle includes a layer having a rock salt type structure. A thickness of the layer is not less than 5 nm and not more than 80 nm. A void ratio of the porous particle is not less than 15% and not more than 48%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle includes a coating of lithium tungstate.