Air-stable copper-containing positive electrode material for sodium ion battery and preparation method of air-stable copper-containing positive electrode material

Abstract

The invention belongs to the technical field of sodium ion battery positive electrode material manufacturing, particularly provides an air-stable copper-containing positive electrode material for a sodium ion battery and a preparation method of the air-stable copper-containing positive electrode material, and aims to solve the problem of structure collapse caused by quick moisture absorption when a sodium ion battery positive electrode material is exposed in air in the prior art. The invention provides an air-stable copper-containing positive electrode material for a sodium ion battery, and the specific chemical general formula of the air-stable copper-containing positive electrode material is Na [Ni < 0.6 > Fe < 0.25 > Mn < 0.15 >] < 1-x > Cu < x > O < 2 >, meanwhile, the invention further provides a preparation method of the copper-containing positive electrode material for the sodium ion battery, one-step sintering is adopted, copper smoothly enters a transition metal layer, the effect of stabilizing a layered structure is achieved in the frequent deintercalation process of sodium, the cycle life of the material is guaranteed, the valence state of the copper element is low, the copper element is stable in air and cannot be oxidized, and the service life of the material is prolonged. The air stability of the material can be improved, and the anode material structure is prevented from being damaged by sodium removal.

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