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<p>The utilization of anode materials in lithium-ion batteries is constrained by their weak interface stability and fast capacity degradation, thereby limiting the development of high-energy-density battery applications. This work prepares silicon-based composite nanomaterials with a “silicon core–carbon buffer layer–titanium dioxide coating layer” structure through an in-situ composite process and pairs them with a water-based binder to optimize the performance of silicon-based anodes. Microscopic characterization shows that the process successfully constructs the target core–shell structure. The silicon crystal integrity is maintained, the materials are well-dispersed, and the interface bonding is tight. Meanwhile, the materials exhibit excellent thermal stability and strong interface adhesion. Electrochemical testing indicates that the initial discharge capacity at 0.1&#xa0;C achieves 1850 mAh/g, and the capacity remains at 88.6% following 140 cycles. Under high-rate conversion, the capacity recovery reaches 96.2%. The stability of the solid electrolyte interphase film and the efficiency of lithium-ion transport are remarkable, effectively addressing the performance constraints of conventional silicon-based materials. In summary, the prepared silicon-based composite anode combines structural stability with electrochemical advantages, offering a practical approach for advancing high-energy-density lithium-ion batteries and showing significant potential for future applications.</p>

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Optimization of lithium-ion battery performance using silicon-based composite nanomaterials

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Zhiqi Li,
  • Yan Zhao

摘要

The utilization of anode materials in lithium-ion batteries is constrained by their weak interface stability and fast capacity degradation, thereby limiting the development of high-energy-density battery applications. This work prepares silicon-based composite nanomaterials with a “silicon core–carbon buffer layer–titanium dioxide coating layer” structure through an in-situ composite process and pairs them with a water-based binder to optimize the performance of silicon-based anodes. Microscopic characterization shows that the process successfully constructs the target core–shell structure. The silicon crystal integrity is maintained, the materials are well-dispersed, and the interface bonding is tight. Meanwhile, the materials exhibit excellent thermal stability and strong interface adhesion. Electrochemical testing indicates that the initial discharge capacity at 0.1 C achieves 1850 mAh/g, and the capacity remains at 88.6% following 140 cycles. Under high-rate conversion, the capacity recovery reaches 96.2%. The stability of the solid electrolyte interphase film and the efficiency of lithium-ion transport are remarkable, effectively addressing the performance constraints of conventional silicon-based materials. In summary, the prepared silicon-based composite anode combines structural stability with electrochemical advantages, offering a practical approach for advancing high-energy-density lithium-ion batteries and showing significant potential for future applications.