US 12,278,362 B2
Positive electrode material, producing method thereof, positive electrode and lithium secondary battery comprising the 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)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Dec. 3, 2019, as Appl. No. 16/701,997.
Claims priority of application No. 10-2018-0158016 (KR), filed on Dec. 10, 2018.
Prior Publication US 2020/0185714 A1, Jun. 11, 2020
Int. Cl. H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 4/52 (2010.01); H01M 4/525 (2010.01); H01M 10/05 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/505 (2013.01) [H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A positive electrode material, comprising:
a bimodal particle size distribution including a large-diameter particle and a small-diameter particle, wherein the large-diameter particle has a greater average particle diameter (D50) than the small-diameter particle, wherein
the small-diameter particle is a lithium composite transition metal oxide in the form of a single particle and having a nickel content of 80 atm % or greater in all transition metals of the lithium composite transition metal oxide, and containing rock salt phases having an average thickness of 10-30 nm on a surface portion thereof, and
wherein the single particle is a primary particle.