Sodium-containing metal oxide material and preparation method thereof, sodium-ion battery and electric equipment

The invention relates to a sodium-containing metal oxide material, a preparation method of the sodium-containing metal oxide material, a single-crystal positive electrode material, a positive electrode plate, a sodium-ion battery and electric equipment. The preparation method comprises the following steps: preparing a mixed metal ion solution containing a sodium element, a nickel element, an iron element, a manganese element and a metal M element; carrying out spray cracking reaction on the mixed metal ion solution, and cooling to obtain a spray cracking product; roasting the spray cracking product, and cooling to obtain a sodium-containing metal oxide material; the metal M element is selected from one or more of Ti, Zr, Zn, Co, Al, Ce, Mg, Cu, Ca, Cs, W, Mo, Ta, Nb and V. According to the method, a nano-scale spray cracking product can be prepared in one step, and the sodium-containing metal oxide material with a single-crystal structure is prepared by calcining the nano-scale spray cracking product. The pro