POSITIVE ELECTRODE MATERIAL FOR SODIUM-ION BATTERY, AND PREPARATION METHOD THEREOF AND USE THEREOF

The present application provides a positive electrode material for a sodium-ion battery, and a preparation method thereof and use thereof, where the positive electrode material for the sodium-ion battery has a chemical general formula NaNiFeMnMAO, where the element M and the element A are doping elements, M-O of the element M has a bond energy of greater than 500 kJ/mol, the element A has an ionic radius of greater than or equal to 0.06 nm, and the element A has a valence state of +3 of higher, and a XRD pattern of the positive electrode material for the sodium-ion battery is free of impurity phase diffraction peak in a range of 42.5°-43.5°. The element M is doped at a position of an interstitial atom, and the element A can preferentially replace a transition metal at a transition metal site.