Spherical or spherical-like cathode material for a lithium battery, a battery and preparation method and application thereof
US10566606B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2017 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | May 23, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a spherical or spherical-like lithium battery cathode material, a battery and preparation methods and applications thereof. The chemical formula of the cathode material is: LiaNixCoyMnzMbO2, wherein 1.0≤a≤1.2; 0.0<b≤0.05; 0.30≤x≤0.90; 0.05≤y≤0.40; 0.05≤z≤0.50; x+y+z+b=1; M is one or two or more of Mg, Ti, Al, Zr, Y, Co, Mn, Ni, Ba and a rare earth element. A single α-NaFeO2 type layered structure of the cathode material is shown by a powder X-ray diffraction pattern and full width at half maximum FWHM (110) of the (110) diffraction peak near a diffraction angle 2θ of 64.9° is in the range of 0.073 to 0.145; the morphology of the cathode material is spherical or spherical-like primary particles and a small amount of secondary particles; the cumulative percentage of the number of particles having a particle diameter of 5 μm or less is usually larger than 60% in the number-basis particle sizes of primary particles and secondary particles agglomerated by primary particles of the cathode material. The cathode material in the present invention has excellent circulating performance, storage performance and safety performance under high temperature and high …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.