US 12,015,152 B2
Positive electrode active material, manufacturing method thereof, and positive electrode for lithium secondary battery comprising the same
Sang Han Lee, Daejeon (KR); Sang Wook Lee, Daejeon (KR); Byoung Beom Lim, Daejeon (KR); and Yong Hyun Cho, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Jul. 3, 2023, as Appl. No. 18/346,301.
Claims priority of application No. 10-2022-0130721 (KR), filed on Oct. 12, 2022.
Prior Publication US 2024/0128447 A1, Apr. 18, 2024
Int. Cl. H01M 4/505 (2010.01); C01G 53/00 (2006.01); H01M 4/131 (2010.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/505 (2013.01) [C01G 53/50 (2013.01); H01M 4/131 (2013.01); H01M 4/525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/60 (2013.01); C01P 2002/74 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A positive electrode active material comprising a lithium layer doped with a first doping element and a transition metal layer doped with a second doping element, wherein an I(003)/I(006) peak intensity ratio in X-ray diffraction measurement is equal to or less than 23.8,
wherein the first doping element is one or more elements selected from the group consisting of Mg, V, Cr, Cu, Zn, and Ge, and wherein the second doping element is one or more elements selected from the group consisting of Ti, Fe, As, Zr, Al, Nb, Mo, Tc, Ru, Rh, Pd, V, and Te,
wherein the first doping element and the second doping element are an element having a hexacoordinate structure,
wherein the first doping element has an oxidation number of +1 to +2, and
wherein the second doping element has an oxidation number of +2 to +4 and wherein the positive electrode active material has a crystal grain size of 250 nm to 1000 nm.