Positive electrode active material and preparation method thereof, secondary battery, and electric apparatus
US11881582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2023 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | May 25, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li1+xMxTi2−x(PO4)3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2≤x≤0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.