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<p>Nitrogen doping and carbon coating were identified to be two effective ways to alleviate the problems of silicon raw materials in our previous work. Building upon the foundation of this, a ceramic coating technique is introduced to further enhance the physical and electrochemical characteristics of nitrogen-doped carbon-coated silicon monoxide (N-doped SiO<sub>x</sub>@C) materials. This study explores the application of alumina (Al<sub>2</sub>O<sub>3</sub>) and boehmite (AlOOH) powders as coating on the surface of N-doped SiO<sub>x</sub>@C materials to assess their effects. The outcomes demonstrate that AlOOH coating surpasses Al<sub>2</sub>O<sub>3</sub> coating in terms of wettability and liquid absorption capacity, leading to a reduction in the contact angle from 28° to 20°. Following 100 cycles at a current density of 1.05&#xa0;A·g-1, the capacity retention rate of AlOOH coated N-doped SiO<sub>x</sub>@C materials reaches 98.4%, whereas uncoated materials maintain a capacity retention rate of 91.4%. Notably, AlOOH coating significantly enhances the electrochemical performance of N-doped SiO<sub>x</sub>@C materials.</p>

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Preparation and properties of ceramic coated nitrogen-doped carbon coated SiOx anode materials for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年4月11日

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  • Zhengyang Zhou,
  • Lijun Wen,
  • Chenxin Jin,
  • Junjie Hong,
  • Xuwen Liu,
  • Guojun Xu,
  • Fugen Sun,
  • Yong Li,
  • Lang Zhou,
  • Zhihao Yue

摘要

Nitrogen doping and carbon coating were identified to be two effective ways to alleviate the problems of silicon raw materials in our previous work. Building upon the foundation of this, a ceramic coating technique is introduced to further enhance the physical and electrochemical characteristics of nitrogen-doped carbon-coated silicon monoxide (N-doped SiOx@C) materials. This study explores the application of alumina (Al2O3) and boehmite (AlOOH) powders as coating on the surface of N-doped SiOx@C materials to assess their effects. The outcomes demonstrate that AlOOH coating surpasses Al2O3 coating in terms of wettability and liquid absorption capacity, leading to a reduction in the contact angle from 28° to 20°. Following 100 cycles at a current density of 1.05 A·g-1, the capacity retention rate of AlOOH coated N-doped SiOx@C materials reaches 98.4%, whereas uncoated materials maintain a capacity retention rate of 91.4%. Notably, AlOOH coating significantly enhances the electrochemical performance of N-doped SiOx@C materials.