POSITIVE ELECTRODE COATING MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREOF, AND POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING THE COATING MATERIAL

Disclosed are a positive electrode coating material for a lithium secondary battery including graphene oxide surface-modified with cationic functional groups, a preparation method thereof, and a positive electrode and a lithium secondary battery comprising the coating material. The positive electrode coating material prevents the leaching of lithium polysulfide, thereby improving battery performance.