The invention relates to a diaphragm material of a
lithium-
sulfur battery, in particular to a
metal organic framework material and a preparation method thereof. The preparation method comprises the following steps of S1, preparing a ZIF-8 (
zeolite imidazolate framework-8) nanopowder; S2, preparing ZIF8 / CNT (
carbon nanotube) composite
fiber wires by electrostatic
spinning; S3, carbonizing, so as toobtain the hollow porous ZIF8@CNTs; mixing the hollow porous ZIF8@CNTs, conductive
carbon black and PVDF in a NMP solution,
grinding, applying onto a clean diaphragm, and
drying, so as to obtain themodified diaphragm of the
lithium-
sulfur battery. The diaphragm material has the advantages that the property of the diaphragm material is improved; the defects of obvious shuttle effect of polysulfides in the
lithium-
sulfur battery prepared by the prior art, obvious
volume expansion effect of the lithium-sulfur battery,
instability in the electrochemical property of the battery and the like are overcome; the production technology is simplified, and the production cost is reduced.