The application relates to the technical field of functional materials, in particular to
nitrogen-doped graphitized carbon microspheres and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: performing
carbonization treatment on
polymer-based microspheres to prepare
polymer-based carbon microspheres; performing activation treatment on the
polymer-based carbon microspheres by using an activator to prepare
porous carbon microspheres; mixing the
porous carbon microspheres, a catalyst, a
nitrogen source and a
solvent, and performing heat treatment under vacuum conditions to prepare
nitrogen-
doped carbon microspheres; the catalyst comprises one or more of
metal salt catalysts and non-
metal oxide catalysts; the temperature of the heat treatment is 90 DEG C-200 DEG C; under a protective
atmosphere, the nitrogen-
doped carbon microspheres are subjected to graphitization treatment at 900 DEG C-1700 DEG C to prepare nitrogen-doped graphitized carbon microspheres. The preparation method provided by the application has the advantages of low graphitization temperature, low
energy consumption and easy large-scale production, and the nitrogen-doped graphitized carbon microspheres prepared by the method have a
high nitrogen doping amount.