	US 12,148,926 B2
	Positive electrolyte active material for secondary battery, preparation method thereof, and lithium secondary battery including same
Sang Min Park, Daejeon (KR); Ji Hye Kim, Daejeon (KR); Tae Gu Yoo, Daejeon (KR); Wang Mo Jung, Daejeon (KR); and Gi Beom Han, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/279,759
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Oct. 21, 2019, PCT No. PCT/KR2019/013805 § 371(c)(1), (2) Date Mar. 25, 2021, PCT Pub. No. WO2020/085731, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0129161 (KR), filed on Oct. 26, 2018.
Prior Publication US 2022/0037658 A1, Feb. 3, 2022
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01)

CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/0471 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)]

14 Claims

1. A positive electrode active material for a secondary battery, the material being a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn),

wherein the lithium composite transition metal oxide is represented by Formula 1 below,

Li_pNi_{1-(x1+y1+z1+w1)}Co_x1Mn_y1M^a_z1M^b_w1O_2+δ [Formula 1]

wherein

M^aincludes at least two elements of Zr, Al, V, Co, or Mg as first dopants,

M^bincludes at least two elements of Ti, Y, Sr, Nb, Ba, or Ca as second dopants, and

1≤p≤1.5,0<x1≤0.5,0<y1≤0.5,0<z1≤0.025,0<w1≤0.015, and −0.1≤8≤1, and

and

the lithium composite transition metal oxide is in a form of particles having a crystallite size of 170 nm to 300 nm, and wherein:

the first dopants are contained in the total content of 2,000 ppm to 6,000 ppm; and

the second dopants are contained in the total content of more than 1,500 ppm to 3,000 ppm.