Preparation method of sodium electric hard carbon negative electrode material

Abstract

The application relates to the technical field of hard carbon negative materials, and discloses a preparation method of a sodium battery hard carbon negative material, which comprises the following steps: S1: dispersing zinc oxide nanoparticles in a mixed solvent of anhydrous ethanol and deionized water, placing the mixed solvent in an ultrasonic cleaner for ultrasonic dispersion until a uniform and stable milky white suspension is obtained; adding a polymer carbon source into the milky white suspension, and forming a polymer coating layer on the surface of the zinc oxide nanoparticles through reaction. The preparation method of the sodium battery hard carbon negative material introduces a polymer carbon source on the surface of zinc oxide nanoparticles to form a core-shell structure template agent, and then the template agent is combined with a main carbon precursor for carbonization and acid washing to remove the template, so that macro-pore structures are constructed by using the zinc oxide template, and meanwhile, the polymer carbon source is used to derive rich micropores and mesopores on the surface of the template and in the subsequent carbonization process, a multi-level pore structure is formed, and a hard carbon negative material with better performance is provided for the application of a sodium ion battery in the field of large-scale energy storage.

Images