- - METHOD OF PRODUCING CARBON COATED LITHIUM SULFIDE PARTICLE AS A CATHODE MATERIAL FOR LITHIUM SULFUR SECONDARY BATTERIES A CATHODE AND A LITHIUM SULFUR SECONDARY BATTERY COMPRISING THE CATHODE

摘要

The present invention can produce carbon-coated lithium sulfide particles having excellent electrochemical activity through a simple precipitation method using a polymer surfactant under mixed solvent conditions, and it is also possible to obtain various particle shapes and electrochemical characteristics To a process for producing lithium sulfide. A method for preparing lithium sulfide according to the present invention comprises the steps of: dissolving a lithium precursor with a polar first solvent; dissolving a sulfur precursor with a nonpolar second solvent capable of mixing with the first solvent; And a second solvent, and reacting the lithium ions with sulfur ions to synthesize a sulfide (Li ₂ S).