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:
Feb. 17, 2026
Filed:
Sep. 24, 2021
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Yuki Koshika, Niihama, JP;
Haruki Kaneda, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material for a lithium ion secondary battery, in which the lithium-nickel-manganese composite oxide has a hexagonal layered structure, a mole number ratio of elements is represented as Li:Ni:Mn:M:Ti=a:(1-x-y-z):x:y:z, provided that 0.97≤a≤1.25, 0.035≤x≤0.15, 0≤y≤0.15, and 0.01≤z≤0.05, a ratio of a total amount of peak intensities of most intense peaks of a titanium compound to a (003) diffraction peak intensity that is the most intense peak of the hexagonal layered structure is 0.2 or less, a crystallite diameter at (003) plane is 80 nm or more and less than 160 nm, and a specific surface area is 0.7 m/g or more and 4.0 m/g or less.