复合负极活性材料、包含其的负极极片、电极组件、电池单体、电池及用电装置
By using composite negative electrode active materials in secondary batteries, including silicon-oxygen composites and high dielectric constant material particles, the lithium plating problem of secondary batteries during high-rate charging is solved, achieving both fast charging and high energy density, and improving battery safety and cycle performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2022-10-31
- Publication Date
- 2026-07-17
AI Technical Summary
During high-rate charging, secondary batteries are prone to lithium plating on the surface of the negative electrode, which poses a safety hazard and limits their application. Existing technologies are unable to effectively improve fast charging performance.
The composite negative electrode active material is adopted, including silicon oxide composite particles and high dielectric constant material particles. The high dielectric constant material particles are attached to the surface of silicon oxide composite particles. The dielectric constant is similar to that of the electrolyte, which reduces the lithium ion desolvation barrier, improves the lithium ion insertion rate, and ensures uniform dispersion through covalent bonding.
It significantly improves the fast charging performance and energy density of secondary batteries, reduces lithium-ion deposition, extends cycle life, and enhances battery stability.
Smart Images
Figure CN116888758B_ABST