Preparation method and application of bismuth telluride modified sodium metal negative electrode

The invention relates to a preparation method and application of a bismuth telluride modified sodium metal negative electrode, and belongs to the technical field of energy storage materials, the preparation method comprises the following steps: 1, removing oxide skin on the surface of a sodium block in an argon environment, pressing the sodium block into a slice with the thickness of 0.6 mm by adopting a tablet press, and weighing to obtain a sodium foil; 2, pouring a certain mass of Bi2Te3 powder on the surface of the sodium foil obtained in the step 1, and folding the sodium foil; rolling the sodium foil by adopting a mechanical cold rolling method to obtain a sodium-bismuth-tellurium ternary alloy; and 3, preparing the sodium-bismuth-tellurium ternary alloy obtained in the step 2 into an electrode plate with the diameter of 14nm for later use. The method is high in yield, good in reproducibility and easy for large-scale production, and has wide application prospects and markets. 碲化铋改性钠金属负极的制备方法及其应用，属于能源存储材