US 11,670,769 B2
Powderous lithium cobalt-based oxide compound for rechargeable lithium ion batteries and a method for making thereof
KyeongSe Song, Chungcheongnam-do (KR); and Maxime Blangero, Chungcheongnam-do (KR)
Assigned to UMICORE, Brussels (BE); and UMICORE KOREA LTD., Chungcheongnam-do (KR)
Filed by Umicore, Brussels (BE); and Umicore Korea Ltd, Chungcheongnam-do (KR)
Filed on Jul. 17, 2020, as Appl. No. 16/931,501.
Claims priority of provisional application 62/877,364, filed on Jul. 23, 2019.
Claims priority of application No. PCT/IB2019/056282 (WO), filed on Jul. 23, 2019; and application No. PCT/IB2019/056284 (WO), filed on Jul. 23, 2019.
Prior Publication US 2021/0028454 A1, Jan. 28, 2021
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A lithium cobalt-based oxide cathode active material powder comprising particles having a median particle size D50 of greater than or equal to 20.00 μm and less than or equal to 45.00m, said particles having an averaged circularity of greater than or equal to 0.85 and less than or equal to 1.00, said particles having a general formula Li1-aCo1-x-y-zAlxM′yMezO2, wherein M′ and Me comprise at least one element of the group consisting of: Ni, Mn, Nb, Ti, W, Zr, and Mg, with −0.01≤a≤0.01, 0.002≤x≤0.050, 0≤y≤0.020 and 0≤z≤0.050, said lithium cobalt-based oxide particles having a R-3m structure and (018) diffraction peak asymmetry factor AD(018) of greater than or equal to 0.85 and less than or equal to 1.15, said diffraction peak asymmetry factor being obtained by a synchrotron XRD spectrum analysis with an emission wavelength λ value equal to 0.825 Å.