FABRICATION METHOD OF NANO-SIZED ACTIVE MATERIALS CONTAINING COPPER PHASE WITH IMPROVED CYCLE-ABILITY FOR ANODE OF LITHIUM SECONDARY BATTERY

摘要

Provided is a method for fabricating nano-sized active materials containing a copper phase for a negative electrode of a lithium secondary battery, which improves cycle characteristics and charge/discharge capacities of the battery. The method for fabricating nano-sized active materials containing a copper phase comprises the steps of: preparing powder containing at least one of tin, cobalt, cobalt-carbon, silicon, magnesium, silicon oxide or cobalt oxide powders, which have particles of 400 nm or less; dissolving a salt containing copper into an organic solvent or water to prepare a solution and adding the solution to the powder, followed by mixing and drying; and performing heat treatment of the mixture under a reducing atmosphere to prepare nano powder containing a copper phase.