Negative-electrode active material and preparation method thereof, secondary battery, and battery module, battery pack, and apparatus containing such secondary battery
US12334557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2023 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Jul 10, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This application discloses a negative-electrode active material and a preparation method thereof, a secondary battery, and a battery module, a battery pack, and an apparatus that include such secondary battery. The negative-electrode active material includes a core and a coating layer covering at least part of a surface of the core, where the core includes artificial graphite, the coating layer includes amorphous carbon, a volume-based particle size distribution of the negative-electrode active material satisfies Dv99≤24 μm, a volume-based median particle size Dv50 of the negative-electrode active material satisfies 8 μm≤Dv50≤15 μm, Dv99 is a particle size corresponding to a cumulative volume distribution percentage of the negative-electrode active material reaching 99%, and Dv50 is a particle size corresponding to a cumulative volume distribution percentage of the negative-electrode active material reaching 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.