Doped and coated sodium electric precursor material as well as preparation method and application thereof

The invention provides a doped and coated sodium electric precursor material as well as a preparation method and application thereof. The doped and coated sodium electric precursor material comprises a sodium electric precursor base material and a coating layer, the sodium electric precursor base material is doped with an element A, and the coating layer is a coating material containing at least one element in the element A; the element A comprises Zn and/or Cu. Zinc and/or copper are/is doped in the bulk phase of the sodium battery precursor material, the surface of the sodium battery precursor material is synchronously coated with zinc and/or copper, and the coating element is at least one of doped elements and is in synergistic cooperation, so that the crystal structure of the obtained sodium battery positive electrode material is more stable, meanwhile, capacity can be indirectly provided for the material, and the service life of the sodium battery positive electrode material is prolonged. Meanwhile, the