CARBON HAVING REDOX FUNCTIONAL GROUP-CONTAINING POLYMER LAYER FORMED THEREON, AND SULFUR-CARBON COMPOSITE AND LITHIUM SECONDARY BATTERY INCLUDING SAME

The present invention relates to: carbon having redox functional group-containing polymer layer formed thereon; a sulfur-carbon composite including same; and a lithium secondary battery including same. More specifically, since the redox functional group-containing polymer performs the function of promoting the reduction of lithium polysulfide, the performance of a lithium secondary battery can be improved by adopting, as a positive electrode material of the battery, the carbon or sulfur-carbon composite having the redox functional group-containing polymer layer formed thereon.