Oxygen-doped porous carbon negative electrode material of sodium/potassium ion battery and preparation method of oxygen-doped porous carbon negative electrode material

The invention relates to the technical field of battery materials, in particular to an oxygen-doped porous carbon negative electrode material of a sodium/potassium ion battery and a preparation method of the oxygen-doped porous carbon negative electrode material. The preparation method comprises the following steps: fully grinding gluconate into powder, carbonizing at high temperature in inert gas, washing the carbonized product, and drying in vacuum to obtain the oxygen-doped porous carbon negative electrode material of the sodium/potassium ion battery. The negative electrode material prepared by the invention has a loose and porous ultrathin nanosheet structure, and the porous structure can promote electrolyte permeation and promote the diffusion behavior of sodium/potassium ions in the carbon material; oxygen atom doping can improve the electron conductivity, increase active reaction sites, enhance the adsorption capacity of the carbon material to sodium/potassium ions, and effectively improve the sodium/p