The invention relates to the technical field of battery materials, in particular to a
sulfur /
vanadium disulfide / MXene
composite material as well as a preparation method and application thereof. According to the preparation method disclosed by the invention, the
sulfur loading capacity can be improved due to the high specific surface area and a large number of active sites of the
sulfur loading material MXene; MXene has unique flexibility and
conductivity, so that the
volume change of the positive
electrode material can be buffered, and the
conductivity of the
composite material can be improved; the surface of the MXene is provided with a large number of functional groups and
static electricity, so that
vanadate ions can be attracted to generate a coordination effect; the
vanadate ions areuniformly adsorbed on the surface of the MXene, so that the
vanadate ions and a sulfur source generate uniform
vanadium disulfide nanosheets on the surface of the MXene in situ at a proper temperature; by introducing the
vanadium disulfide
nanosheet with catalytic activity and
high conductivity into MXene,
lithium polysulfide can be chemically adsorbed, and the
vanadium disulfide nanosheet can bequickly catalyzed and converted into insoluble Li2S2 / Li2S in an
electrolyte, so that a serious shuttle effect is inhibited, the stability of the
lithium-sulfur battery is improved, and the cycle lifeof the
lithium-sulfur battery is prolonged.