US 12,466,743 B2
Lithium transition metal oxide, positive electrode additive for lithium secondary battery, and lithium secondary battery comprising the same
Jongmin Roh, Daejeon (KR); Seokhyun Yoon, Daejeon (KR); Yoon Jae Lee, Daejeon (KR); and Donghoon Suh, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/801,974
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Aug. 17, 2021, PCT No. PCT/KR2021/010899
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2022/158672, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 10-2021-0009337 (KR), filed on Jan. 22, 2021; application No. 10-2021-0106774 (KR), filed on Aug. 12, 2021; application No. 10-2021-0106775 (KR), filed on Aug. 12, 2021; and application No. 10-2021-0106776 (KR), filed on Aug. 12, 2021.
Prior Publication US 2023/0094905 A1, Mar. 30, 2023
Int. Cl. C01G 51/82 (2025.01); C01G 51/42 (2025.01); H01M 4/02 (2006.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 50/46 (2021.01)
CPC C01G 51/82 (2025.01) [C01G 51/42 (2013.01); H01M 4/628 (2013.01); H01M 10/052 (2013.01); H01M 50/46 (2021.01); C01P 2002/54 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A lithium transition metal oxide, which is a lithium cobalt oxide containing a hetero-element,
wherein the hetero-element comprises a 4th period transition metal; and at least one selected from the group consisting of a group 2 element, a group 13 element, a group 14 element, a 5th period transition metal, and a 6th period transition metal, and
the lithium transition metal oxide has a cumulative 50% particle diameter (D50) of 10.0 μm to 25.0 μm and a ratio (Dmax/Dmin) of a maximum particle diameter (Dmax) to a minimum particle diameter (Dmin) of 10.0 to 60.0 when measured by laser diffraction scattering particle size distribution, wherein the lithium transition metal oxide is represented by the following Chemical Formula 1:
Li6Co1-x-yZnxMyO4  [Chemical Formula 1]
wherein,
M is at least one selected from the group consisting of Al, Mg, Ti, Zr, Nb, and W,
x is 0.1 to 0.7, and
y is 0.01 to 0.2.