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<p>The development of high-performance lithium-ion batteries (LIBs) hinges on searching for advanced anode materials with large specific capacities as well as high cycling stability. However, traditional graphite anodes have not met the demand for higher energy storage owing to the deficiency of low lithium storage capacity. In the current work, we focus on designing one composite anode material with multiscale porous (MP) structure and phosphorus (P) doping. The coupling effects of three-dimensional (3D) interconnected skeleton, hollow pore channels, and P doping can facilitate the electrolyte diffusion and the mass transfer, as well as accommodate the volume changes during lithiation/delithiation processes. As expected, the as-prepared MP-SiGeSnSbPAl composite exhibits superior lithium storage performance, achieving a specific capacity of 827.9 mAh/g after 150 cycles at 200&#xa0;mA/g and maintaining the high capacity of 456.7 mAh/g after 400 cycles at 1 A/g. Contrastively, the corresponding surplus capacities are only 590.3 and 225.7 mAh/g for the non-doped counterparts, respectively. In particular, MP-SiGeSnSbPAl displays much more stable cycling performances under the measurement of high areal mass loading of ~ 3&#xa0;mg/cm<sup>2</sup> and the full-cell tests with the lithium iron phosphate as the cathode. This work witnesses one scalable protocol for preparing multinary Si-based composite in terms of facile operation and high lithium storage performances.</p>

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Phosphorus Doping for Enhanced Lithium Storage Performances over Multiscale Porous SiGeSnSbPAl Composite Anode

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月1日

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  • Qin Hao,
  • Zefang Ding,
  • Cuiping Li,
  • Fengxia Li,
  • Li Li,
  • Rumeng Bai,
  • Junqiang Wei,
  • Jinfeng Dong,
  • Wenqing Ma,
  • Caixia Xu,
  • RuiQin Zhang

摘要

The development of high-performance lithium-ion batteries (LIBs) hinges on searching for advanced anode materials with large specific capacities as well as high cycling stability. However, traditional graphite anodes have not met the demand for higher energy storage owing to the deficiency of low lithium storage capacity. In the current work, we focus on designing one composite anode material with multiscale porous (MP) structure and phosphorus (P) doping. The coupling effects of three-dimensional (3D) interconnected skeleton, hollow pore channels, and P doping can facilitate the electrolyte diffusion and the mass transfer, as well as accommodate the volume changes during lithiation/delithiation processes. As expected, the as-prepared MP-SiGeSnSbPAl composite exhibits superior lithium storage performance, achieving a specific capacity of 827.9 mAh/g after 150 cycles at 200 mA/g and maintaining the high capacity of 456.7 mAh/g after 400 cycles at 1 A/g. Contrastively, the corresponding surplus capacities are only 590.3 and 225.7 mAh/g for the non-doped counterparts, respectively. In particular, MP-SiGeSnSbPAl displays much more stable cycling performances under the measurement of high areal mass loading of ~ 3 mg/cm2 and the full-cell tests with the lithium iron phosphate as the cathode. This work witnesses one scalable protocol for preparing multinary Si-based composite in terms of facile operation and high lithium storage performances.