US 12,255,330 B2
Positive electrode active material for secondary battery and lithium secondary battery including the same
So Ra Baek, Daejeon (KR); Eun Sol Lho, Daejeon (KR); Wang Mo Jung, Daejeon (KR); Sang Wook Lee, Daejeon (KR); and Eun Jo, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jan. 23, 2024, as Appl. No. 18/420,436.
Application 18/420,436 is a continuation of application No. 17/263,383, granted, now 11,916,233, previously published as PCT/KR2020/001526, filed on Jan. 31, 2020.
Claims priority of application No. 10-2019-0013809 (KR), filed on Feb. 1, 2019.
Prior Publication US 2024/0162437 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); C01G 53/50 (2025.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/70 (2013.01); C01P 2004/51 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A positive electrode active material for a secondary battery, comprising:
a lithium composite transition metal oxide comprising nickel (Ni), and at least one of cobalt (Co), manganese (Mn), or aluminum (Al),
wherein the nickel (Ni) among metals excluding lithium of the lithium composite transition metal oxide is included in an amount of 60 mol % or more, and
wherein the lithium composite transition metal oxide satisfies Equation 2:
Δ size(|crystallite sizeIB−crystallite sizeFWHM|)≤20  [Equation 2]
wherein, crystallite sizeFWHM is a crystallite size obtained by calculating from X-ray diffraction (XRD) data using a full width at half maximum (FWHM) method, and crystallite sizeIB is a crystallite size obtained by calculating from XRD data using an integral breadth (IB) method.