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:
Dec. 10, 2024
Filed:
Feb. 19, 2020
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Haruki Kaneda, Ehime, JP;
Yuki Koshika, Ehime, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material for a lithium ion secondary battery containing lithium composite oxide particles, the lithium composite oxide particles including lithium (Li), nickel (Ni), manganese (Mn), zirconium (Zr), and an additive element M (M) in an amount of substance ratio of Li:Ni:Mn:Zr:M=a:b:c:d:e, wherein 0.95≤a≤1.20, 0.70≤b≤0.98, 0.01≤c≤0.20, 0.0003≤d≤0.01, and 0.01≤e≤0.20, and the additive element M is one or more elements selected from Co, W, Mo, V, Mg, Ca, Al, Ti, and Ta, wherein, a unit lattice volume V (Å) determined from lattice constants a and c that are calculated from an X-ray diffraction pattern in the lithium composite oxide is 117.5 Åor more and 118.0 Åor less, and a ratio I/Iof a peak strength Iof a (003) plane to a peak strength Iof a (104) plane is 1.70 or more.