US 12,191,484 B2
Positive electrode material for lithium secondary battery, and positive electrode and lithium secondary battery including same
Jung Min Han, Daejeon (KR); Dong Hun Lee, Daejeon (KR); Sung Bin Park, Daejeon (KR); Hyung Man Cho, Daejeon (KR); Jin Tae Hwang, Daejeon (KR); and Wang Mo Jung, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/298,818
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Dec. 4, 2019, PCT No. PCT/KR2019/017027
§ 371(c)(1), (2) Date Jun. 1, 2021,
PCT Pub. No. WO2020/122497, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 10-2018-0158017 (KR), filed on Dec. 10, 2018.
Prior Publication US 2022/0059832 A1, Feb. 24, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A positive electrode material having a bimodal particle size distribution, comprising large-diameter particles and small-diameter particles having different average particle diameters (D50),
wherein the large-diameter particles are a lithium composite transition metal oxide having a nickel content of 80 atm % or greater in all transition metals, and
the small-diameter particles are a lithium composite transition metal oxide including nickel, cobalt, and aluminum, having a nickel content of 80 atm % to 85 atm % in all transition metals, and having an atomic ratio of the cobalt to the aluminum (Co/Al) of 1.5 to 5,
wherein the small-diameter particles comprise a lithium composite transition metal oxide represented by Formula 1 below, and
wherein the large-diameter particles comprise a lithium composite transition metal oxide represented by Formula 3 below:
Lix[NiyCozAlwM1v]O2  [Formula 1]
wherein,
M1 is one or more selected from the group consisting of Mn, W, Cu, Fe, Ba, V, Cr, Ti, Zr, Zn, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, and
0.9≤x≤1.5, 0.8≤y≤0.85, 0<z≤0.1, 0<w≤0.1, 1.5≤z/w≤5, and 0≤v<0.2,
Lia[NibCocM2dM3e]O2  [Formula 3]
wherein,
M2 is Ald1Mnd2,
M3 is one or more selected from the group consisting of W, Cu, Fe, Ba, V, Cr, Ti, Zr, Zn, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, and
0.9≤a≤1.5, 0.8≤b<1, 0<c≤0.15, 0<d<0.2, 0<d1≤0.1, 0<d2<0.2, and 0≤e<0.2.