The invention discloses a
nitrogen-doped hollow spherical carbon-coated
sulfur cathode material, a preparation method and application thereof. The material is a spherical core-shell structure with a
diameter of 100-400 nanometers, and the
chemical composition of the outer layer includes carbon elements accounting for 70%-90% of the total
mass fraction of the outer layer and
nitrogen elements with a
mass fraction of 5%-20%; the inner layer The
chemical composition includes
sulfur element accounting for 80%-95% of the total
mass fraction of the inner layer; the
chemical composition of the inner layer accounts for 65%-72% of the total
mass fraction of the
nitrogen-doped hollow spherical carbon-coated
sulfur cathode material. The preparation method includes
polymer material selection and proportioning, nitrogen-doped hollow spherical carbon-coated sulfur
cathode material and optimization of
electrode preparation process. The present invention solves the technical key to the commercial use of
lithium-sulfur battery positive
electrode materials. The positive
electrode material prepared by the present invention can significantly increase the loading capacity of electrode active sulfur, enhance the cycle stability of
lithium-sulfur battery electrodes, prolong the service life, and reduce production costs. cost, and has broad application prospects.