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<p>The fabrication of hard carbon-based anodes for sodium-ion batteries from biomass solid waste presents a promising avenue for a cost-effective and environmentally sustainable production method. However, the quest for biomass-derived hard carbon materials exhibiting stable performance and high capacity encounters significant challenges. In this study, we synthesized nitrogen and phosphorus co-doped hard carbon (NPCG) via a straightforward hydrothermal-assisted high-temperature carbonization route. Among the synthesized materials, NPCG-2 demonstrated superior electrochemical performance attributed to its expanded interlayer spacing and enhanced active sites. Notably, NPCG-2 exhibited an initial Coulombic efficiency of 46.52% and retained a reversible capacity of 131.4 mAh/g after 100 cycles at a current density of 0.2&#xa0;C. Furthermore, at a higher current density of 0.5&#xa0;C, NPCG-2 maintained an impressive capacity retention rate of 88.90% after 150 cycles, indicative of its robust cyclic stability. This investigation presents a novel and facile approach to achieving multi-atom doping in biomass-derived hard carbon, thereby offering valuable insights into the advancement of sodium-ion battery electrode materials.</p>

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Hydrothermal-Assisted Preparation of Nitrogen and Phosphorus Co-doped Sugarcane Bagasse-Derived Hard Carbon for Sodium-Ion Battery Anode

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Huiqing Yin,
  • Cheng Han,
  • Xiangpeng Gao

摘要

The fabrication of hard carbon-based anodes for sodium-ion batteries from biomass solid waste presents a promising avenue for a cost-effective and environmentally sustainable production method. However, the quest for biomass-derived hard carbon materials exhibiting stable performance and high capacity encounters significant challenges. In this study, we synthesized nitrogen and phosphorus co-doped hard carbon (NPCG) via a straightforward hydrothermal-assisted high-temperature carbonization route. Among the synthesized materials, NPCG-2 demonstrated superior electrochemical performance attributed to its expanded interlayer spacing and enhanced active sites. Notably, NPCG-2 exhibited an initial Coulombic efficiency of 46.52% and retained a reversible capacity of 131.4 mAh/g after 100 cycles at a current density of 0.2 C. Furthermore, at a higher current density of 0.5 C, NPCG-2 maintained an impressive capacity retention rate of 88.90% after 150 cycles, indicative of its robust cyclic stability. This investigation presents a novel and facile approach to achieving multi-atom doping in biomass-derived hard carbon, thereby offering valuable insights into the advancement of sodium-ion battery electrode materials.