Nano-silicon-carbon composite material, preparation method and application thereof
CN118173733BActive Publication Date: 2026-08-28LANXI ZHIDE ADVANCED MATERIALS CO LTD
Patent Information
- Application Number
- CN202311632080.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-08
- Filing Date
- 2023-11-30
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2043-11-30
AI Technical Summary
Technical Problem
[0006]本发明的主要目的在于提供一种纳米硅碳复合材料、其制备方法及应用，有效缓解了纳米硅碳复合材料中硅较大的体积膨胀，解决了现有技术中硅碳复合材料循环稳定性差的问题
Benefits of technology
[0012]针对硅碳复合材料中硅嵌锂导致电极材料体积膨胀、进而导致循环稳定性较差的问题，本申请提供了一种纳米硅碳复合材料，包含硅纳米颗粒、闭孔和乱层石墨三维网络结构。
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Figure CN118173733B_ABST
Abstract
The application provides a nano silicon-carbon composite material, a preparation method and application thereof. The nano silicon-carbon composite material comprises silicon nanoparticles, closed pores and a three-dimensional network structure of turbostratic graphite, the closed pores are N2 inaccessible pore volumes, and the closed pores comprise micropore closed pores; the three-dimensional network structure of turbostratic graphite comprises super-large interlayer spacing turbostratic graphite, the interlayer spacing of the super-large interlayer spacing turbostratic graphite is 0.40-0.55 nm; and the silicon nanoparticles and the closed pores are dispersed in the three-dimensional network structure of turbostratic graphite. The nano silicon-carbon composite material effectively alleviates the volume expansion of silicon in charge and discharge cycles, improves the cycle stability of an electrode, and exhibits excellent electrochemical performance when applied to a lithium ion secondary battery.
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Citation Information
Patent Citations
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