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<p>The development of high-performance LiMn<sub>x</sub>Fe<sub>1-x</sub>PO<sub>4</sub> cathodes represents a critical pursuit in both academic and industrial sectors. While phosphorus (P) content significantly governs the structural stability and electrochemical performance of LiMn<sub>x</sub>Fe<sub>1-x</sub>PO<sub>4</sub>, systematic investigations remain scarce. To address this gap, we engineered NH<sub>4</sub>Mn<sub>0.6</sub>Fe<sub>0.4</sub>PO<sub>4</sub> precursors with tailored P contents and then synthesized different P content LiMn<sub>0.6</sub>Fe<sub>0.4</sub>PO<sub>4</sub> cathodes to elucidate phosphorus-dependent electrochemical behavior. This work substantiates that augmented (NH<sub>4</sub>)<sub>2</sub>HPO<sub>4</sub> dosage enhanced P content and porosity in NMFP precursors, which in turn enhances P content and electrochemical performance of LMFP cathodes. The optimized LMFP-3 cathode exhibited a specific capacity of 140 mAh·g<sup>−1</sup> under 0.1C discharge rate and delivered exceptional cycling stability under high-rate conditions. This study establishes pivotal guidelines for engineering practical high-performance LiMn<sub>x</sub>Fe<sub>1-x</sub>PO<sub>4</sub> cathodes.</p>

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Phosphorus content engineering in LiMn0.6Fe0.4PO4 cathodes: manipulating structural stability and electrochemical performance

  • 期刊论文

  • 发表日期：

    2025年11月9日

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  • Liqian Ke,
  • Yuxuan Ouyang,
  • Liuyuxin Chen,
  • Ling Zhu

摘要

The development of high-performance LiMnxFe1-xPO4 cathodes represents a critical pursuit in both academic and industrial sectors. While phosphorus (P) content significantly governs the structural stability and electrochemical performance of LiMnxFe1-xPO4, systematic investigations remain scarce. To address this gap, we engineered NH4Mn0.6Fe0.4PO4 precursors with tailored P contents and then synthesized different P content LiMn0.6Fe0.4PO4 cathodes to elucidate phosphorus-dependent electrochemical behavior. This work substantiates that augmented (NH4)2HPO4 dosage enhanced P content and porosity in NMFP precursors, which in turn enhances P content and electrochemical performance of LMFP cathodes. The optimized LMFP-3 cathode exhibited a specific capacity of 140 mAh·g−1 under 0.1C discharge rate and delivered exceptional cycling stability under high-rate conditions. This study establishes pivotal guidelines for engineering practical high-performance LiMnxFe1-xPO4 cathodes.