	US 11,942,636 B2
	Positive electrode material, preparation method and uses thereof
Rui Du, Ningde (CN); Yongchao Liu, Ningde (CN); Sihui Wang, Ningde (CN); Deyu Zhao, Ningde (CN); and Na Liu, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Dec. 28, 2020, as Appl. No. 17/135,519.
Application 17/135,519 is a continuation of application No. PCT/CN2019/120585, filed on Nov. 25, 2019.
Claims priority of application No. 201811642372.9 (CN), filed on Dec. 29, 2018.
Prior Publication US 2021/0119209 A1, Apr. 22, 2021
Int. Cl. H01M 4/525 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/525 (2013.01) [H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)]

20 Claims

1. A positive electrode material, comprising a substrate, wherein the substrate comprises secondary particles containing primary particles, a molecular formula of the substrate is Li_xNi_yCo_zM_kMe_pO_rA_m, 0.95≤x≤1.05, 0.50≤y≤0.98, 0≤z≤0.3, 0≤k≤0.4, 0≤p≤0.05, 1≤r≤2, 0≤m≤2, m+r≤2, M is Mn and/or Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, Nb, or Al, and A is selected from one or more of F, Cl, or Br;

a surface of the substrate is coated with an oxide coating layer, and the oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P;

a powder resistivity p of the positive electrode material under a 12 MPa pressure is 10 Ω*cm-5,000 Ω*cm, more specifically 10 Ω*cm-2,000 Ω*cm;

a content Mv of the coating element per unit volume of the positive electrode material is 400 μg/cm³to 15,000 μg/cm³; and

the powder resistivity ρ and the content Mv of the coating element satisfy: ρ/Mv≤1 Ω*cm⁴/μg.