Sodium-ion battery positive electrode material and preparation method thereof

The invention discloses a sodium ion battery positive electrode material and a preparation method thereof. The iron-based polyanion type sodium ion battery positive electrode material is ferric sodium pyrophosphate coated with Ti3C2 nanosheets and carbon, has a three-dimensional structure, and has a structural formula of Na4Fe3 (PO4) 2P2O7 (at) C/Ti3C2, and the structural formula of the iron-based polyanion type sodium ion battery positive electrode material is shown as Na4Fe3 (PO4) 2P2O7 (at) C/Ti3C2. The iron-based sodium ion battery positive electrode material provided by the invention has the advantages of low raw material cost, simple preparation process, low equipment requirement, high reproducibility and multiple purposes, can be used as a power supply of short-mileage electric drive two-wheel, three-wheel and four-wheel passing tools, and also has a better application prospect in the field of chemical energy storage. 本发明公开了钠离子电池正极材料及其制备方法。所述铁基聚阴离子型钠离子电池正极材料，为Ti3C2纳米片和碳双层包覆的焦磷酸磷酸铁钠，具有三维结构，其结构式表示为Na4Fe3