US 12,315,920 B2
Positive electrode active material for lithium secondary battery, method of preparing the same, and positive electrode for lithium secondary battery and lithium secondary battery including the same
Won Tae Kim, Daejeon (KR); Jong Yeol Yu, Daejeon (KR); Seoung Chul Ha, Daejeon (KR); Sun Sik Shin, Daejeon (KR); Hong Kyu Park, Daejeon (KR); and Seong Hoon Kang, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/055,233
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jun. 27, 2019, PCT No. PCT/KR2019/007833
§ 371(c)(1), (2) Date Nov. 13, 2020,
PCT Pub. No. WO2020/004988, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 10-2018-0074990 (KR), filed on Jun. 28, 2018.
Prior Publication US 2021/0218021 A1, Jul. 15, 2021
Int. Cl. H01M 4/485 (2010.01); C01G 53/82 (2025.01); H01M 4/505 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/485 (2013.01) [C01G 53/82 (2025.01); H01M 4/505 (2013.01); H01M 4/62 (2013.01); H01M 10/052 (2013.01); C01P 2002/52 (2013.01); C01P 2002/60 (2013.01); C01P 2004/61 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A positive electrode active material for a lithium secondary battery comprising:
a lithium composite transition metal oxide comprising transition metals including nickel (Ni), cobalt (Co), and manganese (Mn),
wherein the lithium composite transition metal oxide is doped with doping elements including cobalt (Co) and titanium (Ti),
wherein the lithium composite transition metal oxide is represented by Chemical Formula 1:
Li1+pNi1−(x+y+z)CoxMnyMzprivate use character BrketclosestO2+q  [Chemical Formula 1]
wherein 0≤p≤0.5, 0<x≤0.3, 0<y≤0.3, 0<z≤0.1, −0.2≤q≤0.2, and 0<x+y+z≤0.4, and M is the doping elements,
the lithium composite transition metal oxide includes at least one lithium layer and at least one transition metal layer including the transition metals,
the lithium layer and the transition metal layer are alternately arranged,
a thickness of the lithium layer ranges from 2.146 Å to 2.182 Å, and
a thickness of the transition metal layer ranges from 2.561 Å to 2.595 Å, and
wherein, among the doping elements, the cobalt is included in an amount from 2,500 ppm to 4,500 ppm with respect to a total weight of the lithium composite transition metal oxide, and the titanium is included in an amount from 100 ppm to 1,000 ppm with respect to the total weight of the lithium composite transition metal oxide.