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:
Sep. 10, 2024
Filed:
Jul. 30, 2019
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
The present invention relates to a positive electrode active material for a lithium ion secondary battery, including: lithium-nickel-manganese composite oxide particles having a layered hexagonal crystal system, wherein, the lithium-nickel-manganese composite oxide is represented by the following general formula:LiNiMnMMgO (1)in which an element M in the general formula (1) is at least one element selected from Co, Ti, W, B, Mo, V, Nb, Ca, Al, Cr, Zr, and Ta; −0.05≤t≤0.2, 0.50≤a≤0.95, 0.03≤b≤0.40, 0.02≤c≤0.40, 0.0005≤d≤0.05, a+b+c+d=1.0, and 0≤α≤0.5; wherein the lithium-nickel-manganese composite oxide particles contains secondary particles formed by aggregation of primary particles of the lithium-nickel-manganese composite oxide particles, and wherein lattice constants a and c of the lithium-nickel-manganese composite oxide as determined by an X-ray diffraction method are 2.8640 Å≤a≤2.8750 Å and 14.195 Å≤c≤14.225 Å.