US 12,489,112 B2
Positive electrode material and preparation method and usage thereof
Chongheng Shen, Ningde (CN); Rui Du, Ningde (CN); Yongchao Liu, Ningde (CN); Deyu Zhao, Ningde (CN); and Na Liu, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Mar. 4, 2024, as Appl. No. 18/594,726.
Application 18/594,726 is a division of application No. 17/517,958, filed on Nov. 3, 2021, granted, now 11,955,633.
Application 17/517,958 is a continuation of application No. PCT/CN2020/084339, filed on Apr. 11, 2020.
Claims priority of application No. 201910578163.0 (CN), filed on Jun. 28, 2019.
Prior Publication US 2024/0204187 A1, Jun. 20, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 2004/028 (2013.01)] 17 Claims
 
1. A positive electrode material, comprising a substrate, wherein a general formula of the substrate is LixNiyCOzMkMepOrAm, wherein 0.95≤x≤1.05, 0.5≤y≤1, 0≤z≤1, 0≤k≤1, 0≤p≤0.1, 1≤r≤5.2, 0≤m≤2, m+r≤2, M is selected from Mn and/or Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is selected from one or more of N, F, S, and Cl; and
an oxygen defect level of the positive electrode material satisfies at least one of condition (1) and condition (2):
(1) 1.77≤OD1≤1.90, wherein OD1=(I101/I012)0.5, I101 represents XRD diffraction peak intensity of the (101) crystal plane of the positive electrode material in an XRD pattern, and I012 represents diffraction peak intensity of the (012) crystal plane of the positive electrode material in the XRD pattern; and
(2) 0.69≤OD2≤0.74, wherein OD2=(I101/I104)0.5, I101 represents the XRD diffraction peak intensity of the (101) crystal plane of the positive electrode material in the XRD pattern, and I104 represents diffraction peak intensity of the (104) crystal plane of the positive electrode material in the XRD pattern, wherein Li2CO3 content in residual lithium on the surface of the positive electrode material is less than 3000 ppm, and LiOH content on the surface of the positive electrode material is less than 5000 ppm.