US 12,015,151 B2
Composite positive electrode active material, method of preparing the same, positive electrode including composite positive electrode active material,and lithium battery including positive electrode
Donghee Yeon, Seoul (KR); Byoungwoo Kang, Pohang-si (KR); Junghwa Lee, Pohang-si (KR); Byungjin Choi, Seoul (KR); Sukgi Hong, Seongnam-si (KR); and Jinsu Ha, Seongnam-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR); and POSTECH ACADEMY-INDUSTRY FOUNDATION, Pohang-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and POSTECH ACADEMY-INDUSTRY FOUNDATION, Pohang-si (KR)
Filed on May 19, 2022, as Appl. No. 17/748,307.
Application 17/748,307 is a continuation of application No. 16/589,490, filed on Oct. 1, 2019, granted, now 11,362,330.
Claims priority of application No. 10-2018-0146770 (KR), filed on Nov. 23, 2018.
Prior Publication US 2022/0278320 A1, Sep. 1, 2022
Int. Cl. H01M 4/505 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/505 (2013.01) [H01M 4/0471 (2013.01); H01M 4/1391 (2013.01); H01M 4/362 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A composite positive active material represented by Formula 1,
LiaNibCOcMndMeO2  Formula 1
wherein, in Formula 1,
M is zirconium, aluminum, rhenium, vanadium, chromium, iron, gallium, silicon, boron, ruthenium, titanium, niobium, molybdenum, magnesium, or platinum,
1.1≤a≤1.3, b+c+d+e≤1, 0≤b≤0.3, 0≤c≤0.3, 0<d≤0.6, and 0≤e≤0.1, and
wherein, through atomic interdiffusion of lithium and the metal, the composite positive active material has
a uniform distribution of lithium excess regions, and a uniform degree of disorder of metal cations, and
the metal cations have a disordered, irregular arrangement at an atomic scale and a mixed disordered cation structure,
wherein a ratio of an intensity of a (003) peak to an intensity of a (104) peak is about 0.87 to about 1.11, when the composite positive active material is analyzed by X-ray diffraction using Cu Kα radiation, and
wherein a full width at half-maximum of a diffraction peak between 43º and 45° 2θ of the composite positive active material is about 0.2° to about 0.32°, when the composite positive active material is analyzed by X-ray diffraction using Cu Kα radiation.