Negative electrode material and electrochemical apparatus and electronic apparatus containing the negative electrode material
US12334544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2021 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Dec 7, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode material of this application includes silicon-based particles, where the silicon-based particles include: a silicon oxide SiOx, where x is 0.5 to 1.6; and a carbon layer, where the carbon layer covers at least a portion of a surface of the silicon oxide SiOx. In a Raman spectrum, a ratio of a height I1350 of the silicon-based particles at a peak of 1350 cm−1 to a height I1580 at a peak of 1580 cm−1 satisfies 0<I1350/I1580<5, and a ratio of a height I510 at a peak of 510 cm−1 to the height I1350 at the peak of 1350 cm−1 satisfies 0<I510/I1350<12. A lithium ion battery prepared from the negative electrode active material has improved first efficiency, cycling performance, and rate performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.