Powderous lithium cobalt-based oxide compound for rechargeable lithium ion batteries and a method for making thereof
US11670769B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 17, 2020 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | May 24, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium cobalt-based oxide cathode active material powder comprising particles having a median particle size D50 of greater than or equal to 20 μm, preferably 25 μm, and less than or equal to 45 μm, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.