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<p>Sodium-ion batteries, known for their abundant resources and low cost, represent a promising alternative to lithium-ion batteries. Among various cathode materials, the polyanionic compound Na₄Fe₃(PO₄)₂P₂O₇ has garnered attention due to its unique three-dimensional sodium-ion transport channels, excellent structural stability, and outstanding safety. This study investigated the influence of different cell preparation parameters such as electrode loading, conductive additives, and electrolyte compositions on the performance of Na₄Fe₃(PO₄)₂P₂O₇ cathodes. The optimized conditions included an electrode loading of 6.9&#xa0;mg cm<sup>−2</sup>, carbon nanotube as the conductive additive, and an electrolyte of 1.0&#xa0;M NaClO₄ in Propylene Carbonate (100 vol%) with 2.0% Fluoroethylene Carbonate. Furthermore, Na₄Fe₃(PO₄)₂P₂O₇ cathodes were paired with hard carbon anodes to assemble full cells, enabling the evaluation of their practical application potential. The Na₄Fe₃(PO₄)₂P₂O₇ cathodes demonstrated excellent rate capability and cycling stability under these optimized conditions. These findings highlighted the promise of Na₄Fe₃(PO₄)₂P₂O₇ as a high-performance cathode material for next-generation sodium-ion batteries.</p> Graphical abstract <p></p>

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From half-cell to full-cell: practical evaluation of Na4Fe3(PO4)2P2O7/hard carbon sodium-ion batteries under optimized conditions

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Mengmeng Liu,
  • Lina Zhang,
  • Zhiyao Li,
  • Xiaoning Li,
  • Weiwei Xu,
  • Naixin Wang,
  • Lin Sun,
  • Jing Mao,
  • Kehua Dai

摘要

Sodium-ion batteries, known for their abundant resources and low cost, represent a promising alternative to lithium-ion batteries. Among various cathode materials, the polyanionic compound Na₄Fe₃(PO₄)₂P₂O₇ has garnered attention due to its unique three-dimensional sodium-ion transport channels, excellent structural stability, and outstanding safety. This study investigated the influence of different cell preparation parameters such as electrode loading, conductive additives, and electrolyte compositions on the performance of Na₄Fe₃(PO₄)₂P₂O₇ cathodes. The optimized conditions included an electrode loading of 6.9 mg cm−2, carbon nanotube as the conductive additive, and an electrolyte of 1.0 M NaClO₄ in Propylene Carbonate (100 vol%) with 2.0% Fluoroethylene Carbonate. Furthermore, Na₄Fe₃(PO₄)₂P₂O₇ cathodes were paired with hard carbon anodes to assemble full cells, enabling the evaluation of their practical application potential. The Na₄Fe₃(PO₄)₂P₂O₇ cathodes demonstrated excellent rate capability and cycling stability under these optimized conditions. These findings highlighted the promise of Na₄Fe₃(PO₄)₂P₂O₇ as a high-performance cathode material for next-generation sodium-ion batteries.

Graphical abstract