Novel nickel-manganese-based layered sodium ion battery positive electrode material

The invention belongs to the technical field of electrochemistry, and particularly discloses a novel nickel-manganese-based layered sodium ion battery positive electrode material, the general formula of which is NaxNiyMnzM1-y-zO2, in the general formula, M comprises at least one of iron, zinc, nickel, copper, lithium and titanium, 0.5 < = x < = 1.0, 0 < y < 1.0, and 0 < z < 1.0. One or more metal ions are doped in a TM layer of a nickel-manganese-based layered positive electrode oxide, occupation of two different Wyckoff sites is regulated and controlled, rearrangement of Na < + > is successfully induced, the Nae/Naf proportion is regulated and controlled, after the metal ions are doped in the TM layer, Na < + > preferentially occupies the Nae sites, the original arrangement mode of Na < + > is changed, and ordered arrangement of TMn < + > and Na < + >/vacancies is disturbed. The unordered Na < + > distribution and the preferential occupation of Nae sites not only provide a new coordination environment for ef