US 12,068,475 B2
Cathode active material for lithium secondary battery and lithium secondary battery including the same
Mi Jung Noh, Daejeon (KR); Jik Soo Kim, Daejeon (KR); Sang Bok Kim, Daejeon (KR); Ji Hoon Choi, Daejeon (KR); and Kook Hyun Han, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR)
Filed on May 21, 2021, as Appl. No. 17/326,461.
Application 17/326,461 is a continuation of application No. 16/399,407, filed on Apr. 30, 2019, granted, now 11,031,590.
Claims priority of application No. 10-2018-0073435 (KR), filed on Jun. 26, 2018; and application No. 10-2018-0100631 (KR), filed on Aug. 27, 2018.
Prior Publication US 2021/0280856 A1, Sep. 9, 2021
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/36 (2006.01); H01M 4/485 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); H01M 4/485 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2004/01 (2013.01); C01P 2004/03 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2004/84 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A cathode active material for a lithium secondary battery, comprising:
a lithium metal oxide particle containing Ni;
an aluminum-zirconium oxide represented as AlZrO formed on at least a part of a surface of the lithium metal oxide particle as a coating of the lithium metal oxide particle; and
a boron-including oxide as an additional coating formed on the coating of the aluminum-zirconium oxide, wherein the boron including oxide includes at least one selected from the group consisting of B4O10, AlBO3 and Li2B4O7, and
wherein the lithium metal oxide particle is formed of a crystal of a compound represented by Formula 1 below:
LiαNiyMzO2-β  Formula 1
wherein, in the above Formula 1, M is at least one element selected from the group consisting of Co, Mn, Ti, Zr, Al and B, and α, β, y, and z are in a range of 0.7≤α ≤1.1, −0.1≤β≤ 0.5, 0.7≤y≤0.95, and 0.95<y+z≤1.1, respectively.