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Updated: May 21, 2025

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Locally Ordered Graphitized Carbon Coating Enables Recycled Microsized Silicon as High-Performance Anodes.

Minghao Ma1,2, Haimei Li2, Yingtong Hu2

  • 1State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

ACS Applied Materials & Interfaces
|March 19, 2025
PubMed
Summary

Microsized silicon anodes achieve high capacity and stability for lithium-ion batteries using a novel graphitized carbon coating. This cost-effective method enhances silicon anode performance for industrial applications.

Keywords:
lithium-ion batteriesmicrosized siliconrecycled siliconsilicon anodessilicon/carbon composites

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Microsized silicon (m-Si) is a promising anode material for lithium-ion batteries due to its high capacity and low cost.
  • Particle fragmentation during cycling limits the practical application of m-Si anodes.
  • Existing carbon coating methods require improvement for scalable and high-performance m-Si anodes.

Purpose of the Study:

  • To develop a cost-effective and scalable method for producing high-performance m-Si anodes.
  • To enhance the electrochemical stability and capacity retention of m-Si anodes.
  • To utilize photovoltaic waste-derived m-Si for sustainable battery production.

Main Methods:

  • A novel locally ordered graphitized carbon coating strategy was applied to m-Si particles.
  • Electrochemical performance was evaluated using coin cells and full cells (NCM811//Si@t-C).
  • Material characterization focused on the structure and properties of the carbon coating.

Main Results:

  • The m-Si/carbon material achieved a high capacity of 3203 mA h g-1 at 0.2 A g-1 and 1532 mA h g-1 at 4 A g-1.
  • The full cell demonstrated excellent capacity retention of 95.13% over 100 cycles.
  • The graphitized carbon layer effectively buffered volume changes and improved Li+ diffusion.

Conclusions:

  • The proposed graphitized carbon coating strategy significantly enhances the performance of m-Si anodes.
  • This approach offers a scalable and cost-effective solution for industrial m-Si anode production.
  • The method promotes the application of m-Si in next-generation lithium-ion batteries, reducing overall battery costs.