Sodium-ion battery amorphous carbon negative electrode material and preparation method thereof

The invention discloses a sodium-ion battery amorphous carbon negative electrode material and a preparation method thereof.The sodium-ion battery amorphous carbon negative electrode material is prepared by taking a coal-based raw material with the D50 particle size being 5-20 microns and the water content being smaller than 5% to be subjected to carbonization treatment, and the carbonization treatment comprises the steps that low-temperature carbonization is conducted, specifically, the coal-based raw material is placed in an aerobic environment to be subjected to low-temperature carbonization at the temperature of 200-300 DEG C, and the coal-based raw material is obtained; an oxidation product is obtained; and high-temperature carbonization: placing the oxidation product in an oxygen-free environment, and carrying out high-temperature carbonization at 400-700 DEG C to obtain the negative electrode material. According to the preparation method disclosed by the invention, the coal-based raw material can be pre