A kind of lithium-sulfur battery composite cathode material and preparation method thereof

The invention discloses a kind of lithium-sulfur battery composite cathode materials, it is the matrix using graphene oxide as cell positive material, by graphene oxide and ferroelectric material it is compound after, obtain graphene/Ferroelectric Composites, then graphene/Ferroelectric Composites are mixed with nano-sulfur according to the mass ratio of 3:7 again, is prepared into lithium-sulfur battery composite cathode material；The ferroelectric material is one kind of barium titanate, lead titanates, potassium niobate, strontium titanates, lithium niobate or lead zirconate titanate.Lithium-sulfur battery composite cathode material of the invention improves the electric conductivity of positive electrode as good conductive net and positive electrode substrate using the good electric conductivity and structural stability of graphene oxide；Strong suction-operated using the ferroelectricity of ferroelectric material to polarity polysulfide inhibits the dissolution and shuttle of polysulfide in the electrolytic solution to improve the coulombic efficiency and cycle life of lithium-sulfur cell to reduce the loss of active material.