Antimony-bismuth-nickel alloy negative electrode material of lithium (potassium) ion battery and preparation method of antimony-bismuth-nickel alloy negative electrode material

The invention discloses an antimony-bismuth-nickel alloy negative electrode material of a lithium (potassium) ion battery and a preparation method of the antimony-bismuth-nickel alloy negative electrode material, the material is graphitized carbon coated antimony-bismuth-nickel ternary alloy nanoparticles, the particle diameter is 50-150nm, the carbon shell is graphitized carbon with the thickness of 5-25nm, and the interior is antimony-bismuth-nickel ternary alloy; the molar ratio of antimony to bismuth to nickel is (35-50): (35-50): (0-30). According to the graphitized carbon-coated antimony, bismuth and nickel ternary alloy nano-particles prepared by using a freeze-drying assisted in-situ pyrolysis method, the particle size and the morphology can be effectively controlled. The nickel generated in situ in the reaction process can promote the graphitization degree of the carbon, and the carbon layer crystallization degree of the carbon coating layer can be regulated by regulating the content of the nickel, s