Silicon carbon composite material and preparation method thereof, negative electrode material, negative electrode plate, electrode assembly, battery, electric equipment, and carbon substrate
US12304820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Aug 5, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A silicon carbon composite material includes a carbon matrix and a silicon material, the carbon matrix has a cross-linked porous structure internally, and the silicon material is at least partially distributed in the cross-linked porous structure. A value of flexibility C1 of the silicon carbon composite material satisfies 0.4≤C1≤2. C1 is a factor by which a compression deformation variable of the silicon carbon composite material is scaled to be equal to its rebound deformation variable, representing flexibility of the silicon carbon composite material. When the C1 value satisfies 0.4≤C1≤2, the silicon carbon composite material has good flexibility, reducing overall impact of expansion stress of silicon on the silicon carbon composite material, and allowing for a certain degree of contractility of the carbon matrix framework, so that residual stress can be received and released, thereby maintaining overall stability of the silicon carbon composite material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.