The invention relates to the technical field of
sodium-
ion batteries, and discloses a
sodium-
ion battery negative
electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, mixing pretreated hard carbon, nano
molybdenum disulfide, a
sodium supplementing agent and
polyacrylic acid, performing
spray drying, and performing heat treatment to obtain a composite active material; s2, uniformly mixing diallylamine,
sodium hydroxide and
tetrahydrofuran under the protection of
nitrogen, cooling and stirring, adding 3-chloropropyltrimethoxysilane, stirring for 2-4 hours, removing a
solvent, and performing post-treatment to obtain modified
silane; taking mercaptoimidazole, naphthalenethiol,
triethylamine and
ethanol, heating, stirring and activating, adding the modified
silane, heating, stirring and reacting for 4-6 hours, and removing a
solvent to obtain a modifier; s3, adding the composite active material into
ethanol and water, adding a modifier, heating, stirring, filtering, washing and
drying to obtain a modified composite active material; and mixing the modified composite active material with
polyaniline to obtain the negative
electrode material.