US 12,249,712 B2
Positive electrode active material for lithium secondary battery and preparation method thereof
Tae Gu Yoo, Daejeon (KR); Younguk Park, Daejeon (KR); Jintae Hwang, Daejeon (KR); Wang Mo Jung, Daejeon (KR); and Sungbin Park, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Mar. 19, 2024, as Appl. No. 18/609,708.
Application 18/609,708 is a continuation of application No. 18/214,800, filed on Jun. 27, 2023, granted, now 11,967,714.
Application 18/214,800 is a continuation of application No. 18/100,778, filed on Jan. 24, 2023, granted, now 11,909,045, issued on Feb. 20, 2024.
Application 18/100,778 is a continuation of application No. 16/755,688, granted, now 11,594,727, issued on Feb. 28, 2023, previously published as PCT/KR2018/014367, filed on Nov. 21, 2018.
Claims priority of application No. 10-2017-0156745 (KR), filed on Nov. 22, 2017; and application No. 10-2018-0143840 (KR), filed on Nov. 20, 2018.
Prior Publication US 2024/0234719 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/00 (2006.01); C01G 53/50 (2025.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/60 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A positive electrode active material for a lithium secondary battery, comprising:
a nickel-based lithium composite metal oxide single particle, wherein the single particle includes a plurality of crystal grains, and
an element doped in a crystal lattice of the single particle, wherein the element is one or more selected from the group consisting of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, and B,
wherein the single particle includes, in the crystal lattice, a surface part having a rock salt structure, a spinel structure, or a mixed structure thereof from a surface of the single particle to a depth of 0.13% to 5.26% of a radius of the single particle, and a central part having a layered structure from an interface with the surface part thereof to the center part of the single particle.