化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (8) : 181-184. DOI: 10.19817/j.cnki.issn1006-3536.2026.08.001

科学研究

铁基混合磷酸盐材料Na₃Fe₂PO₄P₂O₇的制备及其电化学储钠性能研究

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Study on preparation and electrochemical sodium storage performance of iron-based mixed phosphate material Na₃Fe₂PO₄P₂O₇

An Haoping¹, Zhang Wei¹, Liu Guoqiang², Chen Liang³

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文章历史 +

Received
2025-05-06
Issue Date	Revised Date
2026-08-20	2025-05-06

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摘要

聚阴离子类铁基混合磷酸盐Na₃Fe₂PO₄P₂O₇正极材料具有较高的理论比容量、合适的工作电压和循环过程中较小的体积变化率等优点,但是合成条件较为苛刻,对原料的选择和煅烧温度的控制非常严格,较难得到纯相结构。此外,该材料本征电子电导率低,影响电化学储钠性能的发挥。采用喷雾干燥法制备的铁基混合磷酸盐Na₃Fe₂PO₄P₂O₇材料具有良好的电化学性能,在0.5C倍率下初次放电比容量为80.8mAh/g,在20C高倍率下比容量仍保持44.3mAh/g,在1C倍率下循环500圈后容量保持率为84.3%。此外,该材料还展现出良好的抗空气敏感性能。

Abstract

The polyanionic iron-based mixed phosphate cathode material Na₃Fe₂PO₄P₂O₇ offers advantages such as high theoretical specific capacity,suitable operating voltage,and minimal volume variation during cycling.However,its synthesis conditions are stringent,requiring precise control over raw material selection and calcination temperature,making it challenging to obtain pure-phase structures.Additionally,the material suffers from inherently low electronic conductivity,which hinders its electrochemical sodium storage performance.In this study,Na₃Fe₂PO₄P₂O₇ samples prepared via spray-drying method exhibited superior electrochemical performance.The material delivered an initial discharge specific capacity of 80.8mAh/g at 0.5C,maintained a reversible capacity of 44.3mAh/g even at a high rate of 20C,and retained 84.3% of its capacity after 500 cycles at 1C.It also exhibited excellent resistance to air sensitivity.

关键词

钠离子电池 / 喷雾干燥法 / 电化学性能 / Na₃Fe₂PO₄P₂O₇

Key words

sodium-ion batteries / spray-draying method / electrochemical properties / Na₃Fe₂PO₄P₂O₇

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铁基混合磷酸盐材料Na₃Fe₂PO₄P₂O₇的制备及其电化学储钠性能研究[J]. 化工新型材料, 2026, 54(8): 181-184 DOI:10.19817/j.cnki.issn1006-3536.2026.08.001

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