Lithium ion battery cathode material and lithium ion battery
US10665862B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2018 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jun 29, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a lithium ion cathode material and a lithium ion battery. The chemical formula of the cathode material is: LiaNixCoyMnzMbO2, wherein 1.0≤a≤1.2; 0.00≤b≤0.05; 0.30≤x≤0.60; 0.10≤y≤0.40; 0.15≤z≤0.30; x+y+z=1; M is one or two or more selected from the group consisting of Mg, Ti, Al, Zr, Y, W, Mn, Ba and rare earth elements; wherein the scanning electron microscope observation shows that, the cathode material consists of secondary particles agglomerated by 10 or less primary single crystal particles and secondary particles agglomerated by more than 10 primary single crystal particles, and wherein, the area percentage of the secondary particles agglomerated by 10 or less primary single crystal particles is greater than 80%, and the area percentage of the secondary particles agglomerated by more than 10 primary single crystal particles is less than or equal to 20%. The lithium battery prepared by the cathode material of the present invention has good cycling performance, the preparation method thereof is simple, and can be conveniently and massively produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.