PREPARATION METHOD FOR SODIUM ION BATTERY CATHODE MATERIAL AND APPLICATION OF SODIUM ION BATTERY CATHODE MATERIAL

Provided by an embodiment of the present disclosure is to provide a preparation method for a sodium ion battery cathode material, including the following steps: dispersing a sodium source compound, iron hydrogen phosphate hydrate and a carbon source compound in water according to a certain proportion, and stirring and mixing to obtain a dispersion solution; sand-grinding the dispersion solution in a sand mill for a certain period of time to obtain slurry; drying the sanded slurry to obtain a powdery precursor; and sintering and pulverizing the powdery precursor to obtain a sodium ion battery cathode material. The sodium ion battery cathode material prepared by the preparation method has high crystal phase purity, higher compaction density, and higher energy density. The sodium ion battery prepared based on the sodium ion battery cathode material has good battery cycle performance and stability. Meanwhile, the technical process of the preparation method is simple, and suitable for large-scale industrial production.