Lithium-sulfur battery positive electrode material, lithium-sulfur battery positive electrode, lithium-sulfur battery and preparation method

The invention discloses a lithium-sulfur battery positive electrode material, a lithium-sulfur battery positive electrode, a lithium-sulfur battery and a preparation method, and belongs to the technical field of secondary batteries. The lithium-sulfur battery positive electrode material comprises a coordinated unsaturated metal organic framework material containing at least one metal element of Co, Ni, Cu, Zn or Mn. Compared with a metal organic framework material, the coordination unsaturated metal organic framework material has more metal active sites and structural defects, and can enhance the adsorption effect on polysulfide. The lithium-sulfur battery positive electrode is prepared by using the lithium-sulfur battery positive electrode material, and when the lithium-sulfur battery positive electrode is applied to a lithium-sulfur battery, the shuttle effect of lithium polysulfide at the positive electrode can be effectively relieved, so that the problem of capacity fading of the lithium-sulfur battery is