Composite negative electrode material for lithium ion battery, preparation method thereof, and use thereof in lithium ion battery
US11909035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2019 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Oct 3, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present application provides a composite negative electrode material of a lithium ion battery, a preparation method thereof and the use thereof in a lithium ion battery. The composite negative electrode material includes a SiOx-based active material and a polycarbonate coating layer coated on a surface of the SiOx-based active material. The method includes: (1) preparing a monomer solution of unsaturated carbonate; (2) polymerizing the monomer in presence of a polymerization catalyst to obtain a polymer solution; and (3) adding a SiOx-based active material, water and a polymer catalyst to the polymer solution, and further polymerizing to coat the SiOx-based active material, to obtain the composite negative electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.