▎ 摘　　要

NOVELTY - Preparation of flexible high-sulfur-loaded self-repairing cathode structure involves diluting macromolecular polymer with toluene or ethyl acetate, spraying obtained macromolecular polymer diluted solution on a metal substrate containing graphene foam, polymerizing polymer monomer in the macromolecule polymer dilution solution in the pores of the graphene foam, removing metal matrix, uniformly coating carbon/sulfur active material slurry on the pores of the obtained three-dimensionally interconnected graphene/macromolecular polymer flexible foam, and drying. USE - Preparation of flexible high-sulfur-loaded self-repairing cathode structure used for lithium-sulfur battery (claimed). ADVANTAGE - The method enables economical preparation of flexible high-sulfur-loaded self-repairing cathode structure with high strength, excellent electrochemical property, by simple process. The lithium-sulfur battery containing flexible high-sulfur-loaded self-repairing cathode structure has high active material surface density, specific capacity and specific energy density. DETAILED DESCRIPTION - Preparation of flexible high-sulfur-loaded self-repairing cathode structure involves diluting macromolecular polymer with toluene or ethyl acetate, obtaining macromolecular polymer diluted solution, spraying macromolecular polymer diluted solution on a metal substrate containing graphene foam by dipping or spin coating method at 60-120 degrees C, polymerizing polymer monomer in the macromolecule polymer dilution solution in the pores of the graphene foam for 2-12 hours, removing metal matrix, uniformly coating carbon/sulfur active material slurry on the pores of the obtained three-dimensionally interconnected graphene/macromolecular polymer flexible foam using doctor blade, and drying at 30-90 degrees C for 0.5-24 hours. The volume ratio of macromolecular polymer and toluene or ethyl acetate is 1:1-50. The cathode structure comprises three-dimensionally interconnected graphene/macromolecular polymer flexible foam and carbon/sulfur active material layer, in which graphene/macromolecular polymer flexible foam is self-healing macromolecular polymer-coated three-dimensionally interconnected graphene foam, and the three-dimensionally interconnected graphene/macromolecular polymer flexible foam is filled with carbon/sulfur active material.