▎ 摘　　要

NOVELTY - Porous carbon material has a specific surface area of 200-1700 m2/g and impurities removed through pretreatment using microwaves. USE - The porous carbon material is used in positive electrode for lithium-sulfur battery (claimed). The lithium-sulfur battery is used in battery cell as power source for small device, and unit cell for battery module which is a power source for a medium or large device. The battery module includes power tool, electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric truck, and electric commercial vehicles. The battery module is used as a power supply for one or more medium or large sized devices among power storage systems. The lithium-sulfur battery is used as battery for aircraft in urban air mobility (UAM). ADVANTAGE - The porous carbon material improves the charging overvoltage problem of the battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing the porous carbon material from which impurities are removed, involving (a) putting a porous carbon material having a specific surface area of 200-1700 m2/g into an airtight container and then purging by injecting an inert gas, and (b) applying microwaves to the porous carbon material; #a positive electrode for a lithium-sulfur battery comprising the sulfur-carbon composite in which sulfur is supported on the porous carbon material from which the impurities are removed, as a positive electrode active material; and #a lithium-sulfur battery comprising the positive electrode, cathode, a separator interposed between them, and an electrolyte including a first solvent including a fluorine-based ether compound, a second solvent including a glyme-based compound, and a lithium salt.