▎ 摘　　要

NOVELTY - Cathode for a lithium secondary battery comprises a cathode active material and bottom-up graphene oxides (BGOs) coated on the surface of the cathode active material, where the BGOs are crosslinked to each other through a hydrocarbon compound containing a cationic functional group. USE - As cathode for a lithium secondary battery. ADVANTAGE - The cathode prevents the elution of lithium polysulfide and improves battery performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method of manufacturing the cathode for the lithium secondary battery involving (a) manufacturing a BGO through the top method (Bottom-up approach), (b) reforming the surface of the prepared BGO with the hydrocarbon group comprising nitrogen, oxygen and sulfur, (c) preparing a mixed solution by dissolving two or more halogen-substituted hydrocarbon compounds in a solvent, and adding the surface-modified bottom-up graphene oxide (SBGO), and (d) reacting the prepared mixture to form a crosslinkage between the SBGO, and at the same time form a crosslinked surface-modified bottom-up graphene oxide (CSBGO) with each other coating the cathode active material to obtain the product; and (2) the lithium secondary battery comprising the cathode for the lithium secondary battery, a lithium metal negative electrode, an electrolyte interposed between the positive electrode and the negative electrode and a separator.