Sodium ferric phosphate pyrophosphate positive electrode material, preparation method and application thereof

The invention discloses a sodium ferric phosphate pyrophosphate positive electrode material, a preparation method and application thereof, the positive electrode material comprises sodium ferric phosphate pyrophosphate and carbon, the molar ratio of sodium, iron and phosphorus in the positive electrode material is (4 + x): (3-y): 4, x is more than 0 and less than or equal to 0.5, y is more than 0 and less than or equal to 0.3, and the specific surface area of the positive electrode material is 10m < 2 >/g-24m < 2 >/g. The composition and specific surface area of the sodium ferric pyrophosphate positive electrode material are reasonably selected, and the positive electrode material has the characteristics of high first-circle coulombic efficiency and high capacity while powder falling of a pole piece is inhibited to improve the processability. 本发明公开了磷酸焦磷酸铁钠正极材料、制备方法及其应用，正极材料包括磷酸焦磷酸铁钠和碳，所述正极材料中钠、铁和磷三种元素的摩尔比为(4+x):(3-y):4，其中0＜x≤0.5，0＜y≤0.3，所述正极材料的比表面积为10m2/g-24m2/g。本发明合理选择磷酸焦磷酸铁钠正极材料的组成和比表面积，抑制极片掉粉以提高加工性能的同时，具有高