SULFUR-CARBON COMPOSITE, AND CATHODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY WHICH COMPRISE SAME

Disclosed is a sulfur-carbon composite including a porous carbon material coated with a thiophene-based polymer doped with a dopant and sulfur on at least a portion of an interior and a surface of the porous carbon material, and a positive electrode for lithium secondary battery, and a lithium secondary battery including the same. Also disclosed is a method for preparation thereof.