US 12,438,155 B2
Positive electrode additive for lithium secondary battery and positive electrode material comprising the same
Ju Kyoung Kang, Cheongju-si (KR); Moon Ho Choi, Cheongju-si (KR); and Seung Hyun Choi, Cheongju-si (KR)
Assigned to ECOPRO BM CO., LTD., Cheongju-si (KR)
Filed by ECOPRO BM CO., LTD., Cheongju-si (KR)
Filed on Aug. 27, 2021, as Appl. No. 17/459,967.
Claims priority of application No. 10-2020-0138272 (KR), filed on Oct. 23, 2020.
Prior Publication US 2022/0131149 A1, Apr. 28, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 10/42 (2006.01)
CPC H01M 4/62 (2013.01) [H01M 4/525 (2013.01); H01M 4/628 (2013.01); H01M 10/0525 (2013.01); H01M 10/4235 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
 
1. A positive electrode material for a lithium secondary battery, comprising:
a positive electrode active material; and
a positive electrode additive comprising a lithium metal oxide represented by Formula 1 below:
Li2+aNi1-b-c-dAlbBcM1dO2+e  [Formula 1]
(Here,
M1 is at least one selected from W, Si, Ga and P,
−0.2≤a≤0.2, 0≤b≤0.05, 0≤c≤0.05, 0<d≤0.05, and 0≤e≤0.2),
wherein the molar ratio of B and Al (B/Al molar ratio) in the positive electrode additive is 0.5 to 10, and
wherein a deviation of Al/Ni is uniformly maintained throughout a surface, a core, and a center of the lithium metal oxide.