METHOD OF PREPARING NEGATIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, NEGATIVE ELECTRODE INCLUDING NEGATIVE MATERIAL AND LITHIUM SECONDARY BATTERY INCLUDING SAME

摘要

The present invention relates to a method for producing a tin-based negative electrode active material for a lithium secondary battery, including: a step for producing a mixture by mixing a metallic salt solution, which is produced by adding stannous salt, cobalt salt, iron salt, and a carbon-based material to a solvent, with a reducing agent; a step for forming reducing agent/metal ion complex sol by agitating the mixture; a step for forming reducing agent/metal ion complex gel by performing heat treatment on the reducing agent/metal ion complex sol; and a process for plasticizing the reducing agent/metal ion complex gel.