| abstract |
The present invention relates to a sulfur-carbon composite containing a carbon-based material surface-modified by an acid treatment, a method for producing the same, and a lithium-sulfur battery including the same. The sulfur-carbon composite according to the present invention includes a carbon-based material whose surface is modified to have a hydroxyl group capable of adsorbing polysulfide and a carboxyl group on the surface thereof, thereby suppressing the release of polysulfide when used as a cathode active material of a lithium-sulfur battery . As a result, the capacity characteristics and life characteristics of the battery can be improved. According to the method for producing a sulfur-carbon composite according to the present invention, the surface of a carbonaceous material can be modified by a simple process of treating a mixed solution of nitric acid and sulfuric acid, and the surface functional group content Can be adjusted. |