Pitch-based sodium ion battery negative electrode material based on pre-oxidation, preparation method thereof and obtained product

The invention provides an asphalt-based sodium-ion battery negative electrode material based on pre-oxidation, a preparation method thereof and an obtained product, and belongs to the technical field of sodium-ion batteries. The pre-oxidation-based asphalt-based sodium ion battery negative electrode material provided by the invention is prepared by synthesizing asphalt-based hard carbon on the basis of taking graphene oxide as a modifier. Wherein the surface of the graphene oxide contains a large number of oxygen-containing groups, so that oxygen required by crosslinking of asphalt molecules can be directly provided, and pre-oxidation of the asphalt is assisted; asphalt molecules and graphene oxide are fully mixed by a liquid phase mixing method, so that the time cost caused by oxygen solid phase diffusion is avoided; the carbonized graphene oxide is reduced into graphene, high conductivity and uniform distribution of the graphene can form a high-speed conductive network between the negative electrode of the