Titanium dioxide nano-tube-graphene-sulfur composite material, preparation method and applications thereof

The invention discloses a titanium dioxide nano-tube-graphene-sulfur composite material, a preparation method and applications thereof, and belongs to the field of lithium sulfur battery materials. The preparation method comprises: (1) preparing graphene oxide; (2) dissolving the graphene oxide and titanyl sulfate in water, and carrying out a hydrothermal reaction to obtain a crude product; (3) carbonizing the crude product in a protective gas atmosphere to obtain a titanium dioxide nano-tube-graphene composite material; and (4) dispersing the titanium dioxide nano-tube-graphene composite material and elemental sulfur in a solvent, pressing into a round cake, sealing, and carrying out thermal insulation to obtain thetitanium dioxide nano-tube-graphene-sulfur composite material. According to the present invention, the preparation method is simple, is easy to control, and is suitable for industrialization; and the prepared titanium dioxide has the unique hollow nano-tube structure, and can accommodate a large a