一种硅基负极材料及其制备方法
By employing a double-layer coating structure on silicon-based anode materials, combined with a carbon coating layer generated from the pyrolysis of lithium fluoride and nanocellulose, the volume expansion and conductivity issues of silicon-based anode materials are solved, thereby improving the cycle performance and stability of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 龙子湖新能源实验室
- Filing Date
- 2023-12-19
- Publication Date
- 2026-07-17
AI Technical Summary
Silicon-based anode materials in lithium-ion batteries suffer from problems such as large volume expansion and poor conductivity after lithium intercalation, leading to material pulverization and continuous formation of SEI film, which affects the cycle life and performance of the battery.
The structure employs a double-layer coating: the inner layer is nano-silicon, the middle layer is a porous carbon framework doped with lithium fluoride, and the outer layer is a carbon coating layer generated by the pyrolysis of nanocellulose, forming a good conductive pathway. The stability of the SEI film is improved by lithium fluoride, and a dense outer carbon coating layer is formed by ionic liquid and cellulose.
It improves the conductivity and cycle performance of silicon-based anode materials, enhances the stability of the materials, and extends the battery's lifespan.
Smart Images
Figure CN117525366B_ABST