Positive electrode material for lithium ion battery and preparation method therefor
US11984590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2023 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Aug 17, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a positive electrode material for a lithium ion battery, having the following general formula I: Li1+aNixCoyMnzMcM′dO2−bAb general formula I, wherein −0.05≤a≤0.3, 0.8≤x≤1, 0≤y≤0.2, 0≤z≤0.2, 0≤c≤0.01, 0≤d≤0.01, x+y+z+c+d=1, and 0≤b≤0.05; M and M′ are different from each other and each independently selected from at least one of La, Cr, Mo, Ca, Fe, Ti, Zn, Y, Zr, W, Nb, V, Mg, B, Al, Sr, Ba and Ta, A is selected from at least one of F, Cl, Br, I and S, and the number of crystallite boundaries N in primary particles of the positive electrode material is from 10.5 to 14.5, wherein N is calculated according to Equation I: N=DS/DX Equation I, wherein DS is an average size of the primary particles, as measured from scanning electron microscope (SEM) image of cross section of the positive electrode material, and DX is an average size of crystallites in the primary particles of the positive electrode material, as measured by an XRD test and calculated by the Scherrer equation. Also provided is a method for preparing the positive electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.