Negative electrode material for lithium secondary battery and method for manufacturing the same
By controlling the silicon nanoparticles and grain size of silicon-carbon composite anode materials, the problems of low capacity and short lifespan in lithium secondary batteries have been solved, achieving high capacity and long lifespan battery performance.
Patent Information
- Application Number
- CN202480080089.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-18
- Filing Date
- 2024-12-18
- Publication Date
- 2026-07-17
AI Technical Summary
In existing lithium secondary batteries, graphite-based anode materials have a low theoretical capacity, while silicon-based anode materials experience a sharp decrease in capacity due to volume expansion and contraction during charging and discharging, affecting battery life characteristics.
A silicon-carbon composite is used as the negative electrode material. By controlling the particle size and grain size of silicon nanoparticles and combining them with a specific ratio of crystalline carbon and amorphous carbon, a silicon-carbon composite is formed. The preparation method includes mechanical grinding, pressure molding and carbonization treatment, and controlling the hourly slurry processing volume and carbon coating.
It achieves high capacity and excellent lifespan characteristics, ensuring the stability and electrochemical performance of lithium secondary batteries, making them suitable for mass production.
Smart Images
Figure SMS_1 
Figure SMS_2 
Figure SMS_3