| abstract |
A preparation method and application of a carbon-coated tin selenide negative electrode material belong to the technical field of sodium ion batteries. The calcined SnSe semiconductor material is coated with a dense and uniform carbon layer by high-energy ball milling + annealing treatment, thereby greatly improving the electrochemical properties such as reversible specific capacity and cycle performance. Through high-energy ball milling, while reducing the particle size of SnSe material, a uniform carbon source is introduced on the surface of the material, and the product can be obtained after annealing treatment. The preparation method of the invention is easy to operate, simple in process and low in cost, so it has wide application prospects. The prepared composites have good electrochemical properties, including high reversible specific capacity and good cycle performance. |