16-05-2019 дата публикации
Номер: WO2019059461A3
Автор:
LIM, Young Geun,
LIM, Sun Hye,
KIM, Tae Gyeong,
CHOI, Su An,
JEON, Sang Hoon,
AN, Ji Sun
Принадлежит:
The present invention relates to a cathode active material for a lithium secondary battery, and a lithium secondary battery comprising same. A cathode active material for a lithium secondary battery, according to one embodiment of the present invention, is a secondary particle in which lithium metal oxide primary particles are aggregated, and is represented by chemical formula 1 below, wherein the lithium metal oxide particles have a nickel-based layered structure, the average density of the secondary particle is 0.8 or greater to 1 or less, the Dmin particle size change after pressing at a pressure of 200 MPa is no more than 2.9 μm, and the average particle size of the primary particles may be 0.1 to 1 μm. [Chemical formula 1] Liα[ (ΝixCoy)1-βΑβ]O2. In chemical formula 1, 0.95≤α≤1.05, 0.015≤β≤0.040, 0.73≤x≤0.78, 0.22≤y≤0.27, and A is at least one selected from Al, Ti and Mg.
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