The method of preparing a composite positive electrode material thio

The present invention relates to a method for preparing thio composite positive electrode material comprising polyacrylonitrile and elemental sulfur are dissolved together in a first solvent to form a first solution; additives dissolved in the first solution and elemental sulfur polyacrylonitrile mixing, the additive is at least one metal and metal sulfides; polyacrylonitrile and changing the environment in which elemental sulfur, the elemental sulfur and polyacrylonitrile solubility decreases due to the change in post rather Meanwhile precipitated together with the additive to form a precipitate; and heat-treating the precipitate, the elemental sulfur and polyacrylonitrile chemical reaction occurs composite positive electrode material of the group.