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<p>Silicon oxide (SiO<sub><i>x</i></sub>) is a promising anode material due to its higher theoretical capacity than graphite, more moderate volume expansion than pure silicon, and low cost. However, its practical application is hindered by substantial volume changes during cycling and low intrinsic electrical conductivity. Herein, montmorillonite (MMT) is reported as an economical structural template to construct a three-dimensional porous architecture, denoted as MMT@SiO<sub><i>x</i></sub>/C, by confining SiO<sub><i>x</i></sub>/C within its interlamellar spaces. This configuration effectively buffers volume changes and enhances electrochemical kinetics. The optimized MMT@SiO<sub><i>x</i></sub>/C-800 anode delivers outstanding cycling stability, retaining 92.36% of its capacity after 500 cycles at 2.0&#xa0;A&#xa0;g<sup>−1</sup>, substantially outperforming the SiO<sub><i>x</i></sub>/C-800 (73.51%). The composite also exhibits reduced charge-transfer resistance and improved conductivity. This work provides a viable strategy for developing high-stability silicon-based anodes.</p>

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Montmorillonite-Intercalated Silicon Oxide/Carbon Hybrid Frameworks as Highly Durable Anodes for Lithium-Ion Batteries

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Yang Qu,
  • Dan Hu,
  • Qiubo He,
  • Shuju Zhang,
  • Tingting Yuan,
  • Shiquan Wang,
  • Yanqing Zhang,
  • Jianwen Liu

摘要

Silicon oxide (SiOx) is a promising anode material due to its higher theoretical capacity than graphite, more moderate volume expansion than pure silicon, and low cost. However, its practical application is hindered by substantial volume changes during cycling and low intrinsic electrical conductivity. Herein, montmorillonite (MMT) is reported as an economical structural template to construct a three-dimensional porous architecture, denoted as MMT@SiOx/C, by confining SiOx/C within its interlamellar spaces. This configuration effectively buffers volume changes and enhances electrochemical kinetics. The optimized MMT@SiOx/C-800 anode delivers outstanding cycling stability, retaining 92.36% of its capacity after 500 cycles at 2.0 A g−1, substantially outperforming the SiOx/C-800 (73.51%). The composite also exhibits reduced charge-transfer resistance and improved conductivity. This work provides a viable strategy for developing high-stability silicon-based anodes.