US 12,119,491 B2
Positive electrode active material precursor and preparation method of positive electrode active material precursor
Ju Han Yoon, Daejeon (KR); Kyoung Wan Park, Daejeon (KR); Hyeon Jin Kim, Daejeon (KR); Song Yi Yang, Daejeon (KR); and Young Su Park, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/799,024
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed May 26, 2021, PCT No. PCT/KR2021/006526
§ 371(c)(1), (2) Date Aug. 11, 2022,
PCT Pub. No. WO2021/241995, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 10-2020-0064875 (KR), filed on May 29, 2020.
Prior Publication US 2023/0084633 A1, Mar. 16, 2023
Int. Cl. C01G 53/04 (2006.01); C01G 53/00 (2006.01); 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 53/04 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2004/03 (2013.01); C01P 2004/53 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/10 (2013.01); C01P 2006/11 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A bimodal positive electrode active material precursor comprising:
a first positive electrode active material precursor particle having a core-shell structure; and
a second positive electrode active material precursor particle having a smaller average particle diameter (D50) than the first positive electrode active material precursor particle,
wherein a core part of the first positive electrode active material precursor particle has a composition represented by the following Chemical Formula 1,
wherein a shell part of the first positive electrode active material precursor particle and the second positive electrode active material precursor particle have a composition represented by the following Chemical Formula 2, and
wherein the composition represented by Chemical Formula 1 is different from the composition represented by Chemical Formula 2:
[Nix1Coy1Mnz1M1a](OH)2  [Chemical Formula 1]
[Nix2Coy2Mnz2M2b](OH)2  [Chemical Formula 2]
in Chemical Formula 1 and Chemical Formula 2,
M1 and M2 are each independently one or more selected from among Zr, B, W, Mo, Cr, Al, Ti, Mg, Ta, and Nb,
0.6≤x1≤1.0, 0≤y1≤0.4, 0≤z1≤0.4, 0≤a<0.1, and x1+y1+z1+a=1,
0.6≤x2≤1.0, 0≤y2≤0.4, 0≤z2≤0.4, 0≤b<0.1, and x2+y2+z2+b=1, and
at least one of a or b exceeds 0.