一种快离子导体包覆多孔硅碳材料的制备方法
By depositing nano-silicon on porous carbon and coating it with lithium carbonate and titanium dioxide to form a fast ion conductor—titanium-doped lithium silicate—the problems of volume expansion and cycle stability of silicon-based anodes were solved, achieving high-capacity and stable lithium-ion battery performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGZHOU SIRUN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional graphite anodes have limited theoretical capacity, while silicon-based anodes suffer from structural damage and poor cycle stability due to volume expansion during charging and discharging. Existing fast ion conductors coated with porous silicon-carbon materials also have insufficient cycle stability.
Using porous carbon as a carrier, nano-silicon is deposited through silicon source gas and oxidized to generate silicon oxide. Then, a novel surfactant is used to uniformly coat lithium carbonate and titanium dioxide to form a fast ion conductor - titanium-doped lithium silicate. Finally, a carbon layer is deposited through vapor phase to form a coating material, which improves conductivity and stability.
The charging specific capacity and cycle stability of the fast ion conductor-coated porous silicon-carbon material are improved. The ionic conductivity is enhanced by Ti ion doping, the carbon layer is deposited to reduce the interface resistance, reduce volume expansion, and enhance the cycle stability of the material.
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Figure CN121044567B_ABST