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. 16, 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 is obtained using a lithium composite oxide having a layered structure in a positive electrode active substance. An increase in resistance following repeated charging and discharging is suppressed. The battery includes a positive electrode provided with a positive electrode active substance layer, a negative electrode and a non-aqueous electrolyte. The positive electrode active substance layer contains a porous particle lithium composite oxide having a layered structure. The average void ratio of the porous particle is not less than 12% but not more than 50%, and it contains two or more voids having diameters that are at least 8% of its particle diameter. The surface of the porous particle is provided with a coating of lithium tungstate. The coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 10% but not more than 65%.