POSITIVE ELECTRODE ACTIVE MATERIAL COMPRISING SULFUR-CARBON COMPOSITE AND LITHIUM-SULFUR SECONDARY BATTERY COMPRISING THE SAME

The present disclosure relates to a positive electrode active material for a lithium-sulfur battery, comprising: a sulfur-carbon composite, wherein the sulfur-carbon composite comprises a porous carbon material and a sulfur-based material, the sulfur-based material is located on at least a part of the surface of the porous carbon material, wherein the sulfur-based material comprises at least one of sulfur (Ss) or a sulfur compound; andwherein a sum of particle size D10 and particle size D90 of the porous carbon material is 60 µm or less, orwherein the porous carbon material has a broadness factor (BF) of 7 or less, wherein the broadness factor is the ratio the particle size D90 to the particle size D10 of the porous carbon material.Furthermore, to positive electrode containing the positive electrode active material, as well as lithium-sulfur battery containing the same.