| abstract |
The invention proposes an antimony bismuth sulfide-based negative electrode material for lithium (potassium) ion batteries. The invention is based on the freeze-drying-assisted in-situ pyrolysis method and the subsequent vapor deposition method to in-situ synthesize sulfur-doped graphitized carbon-encapsulated sulfide Antimony and bismuth composite materials (Sb 2 S 3 @C, Bi 2 S 3 @C, Sb 2 S 3 -Bi 2 S 3 @C), the reactants are metal organic acid salts (bismuth potassium citrate, antimony potassium tartrate) in one or all of them. The two-step composite material prepared by this method not only solves the problem of coating graphitized carbon on the surface of sulfide, but also has a small particle size of antimony bismuth sulfide and is completely encapsulated by carbon, which not only improves the electronic conductivity of the material, but also It can effectively alleviate the volume change of the material during charging and discharging, and has good electrochemical performance in potassium ion batteries. |