Silicon oxide/carbon composite negative electrode material and preparation method therefor, and lithium-ion battery
US12255323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2020 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Aug 12, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A preparation method obtains silicon oxide/carbon composite negative electrode material and a lithium-ion battery. The silicon oxide/carbon composite negative electrode material is a secondary particle, and mainly consists of a SiOx/C material. The SiOx/C material includes SiOx particles and a carbon layer with which the surfaces of the SiOx particles are coated. The SiOx particles include Si crystallites. The preparation method includes: 1) synthesizing a silicon oxide bulk; 2) performing crushing to obtain micro-level or nano-level SiOx particles; 3) mixing with a carbon binder; 4) granulating; 5) modification and carbonization; and 6) post-processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.