一种低膨胀、高容量的硅碳复合负极材料及其制备方法
By preparing silicon-carbon composite materials with a gradient distribution of silicon compounds on a porous carbon support, the problems of volume expansion and insufficient capacity of silicon-carbon composite materials during cycling were solved, achieving the effect of low expansion rate and high capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI JINGHUAN NEW ENERGY TECH CO LTD
- Filing Date
- 2025-10-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing silicon-carbon composite anode materials struggle to balance expansion rate control and high capacity. Conventional processes result in poor material stability and rapid capacity decline during cycling.
By using programmed control of the drying and aging process on a porous carbon support to form a gradient distribution of silicon compounds, combined with heat treatment, a silicon-carbon composite material with elemental silicon inside and silicon oxide and silicon carbide on the surface was prepared.
This achievement realizes low expansion rate and high capacity of the material, improves the material's cycle stability and electrochemical performance, and overcomes the contradiction between expansion rate control and high capacity in traditional processes.
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