The invention discloses a
nitrogen-doped hollow spherical carbon-coated
sulfur positive
electrode material as well as a preparation method and application thereof. The material is of a spherical core-shell structure with the
diameter of 100-400 nanometers, and chemical components of an outer layer comprise a carbon element accounting for 70%-90% of the total
mass fraction of the outer layer and anitrogen element accounting for 5%-20% of the total
mass fraction of the outer layer; the chemical components of the inner layer comprise a
sulfur element accounting for 80-95% of the total
mass fraction of the inner layer; and the chemical components of the inner layer account for 65-72% of the total
mass fraction of the
nitrogen-doped hollow spherical carbon-coated
sulfur positive
electrode material. The preparation method comprises the following steps: selecting and proportioning
polymer materials, and optimizing the preparation processes of the
nitrogen-doped hollow spherical carbon-coatedsulfur positive
electrode material and the electrode. The commercial technical key of the
lithium-sulfur battery positive
electrode material is solved, the positive
electrode material prepared by theinvention can obviously increase the loading capacity of electrode active sulfur, the
cycling stability of a
lithium-sulfur
battery electrode is enhanced, the service life is prolonged, the production cost is reduced, and the application prospect is wide.