HARD CARBON NEGATIVE ELECTRODE MATERIAL FOR SODIUM-ION BATTERY AND PREPARATION METHOD THEREFOR

A hard carbon negative electrode material for a sodium-ion battery and a preparation method therefor. The hard carbon negative electrode material is prepared from a hard carbon source and a precursor salt of active metal particles by using a one-step in-situ doping and calcination method. The hard carbon source is one of waste sponge, waste paper products, waste cloth and wood chips, wherein the waste sponge comprises sponges made of lignocellulose and a foamed plastic polymer; the waste paper products comprise waste books, test papers, tissues or hard paper boxes; the waste cloth comprises cloth products made of clothes, home textiles or handicrafts; and the wood chips comprise the leftover materials of all wooden products of a woodwork factory or a furniture factory. The hard carbon negative electrode material has the advantages of an environmental protection performance, safety, an energy-saving property, being beneficial to industrial large-scale production, and having a high capacity, a stable cycle perf