Method of manufacturing negative electrode for secondary battery

A method of manufacturing a negative electrode for a secondary battery, comprising:

• pre-lithiating a silicon-based active material to obtain a pre-lithiated silicon-based active material having lithium intercalated into the silicon-based active material, wherein the pre-lithiating is performed by placing a mesh-type copper electrode and a glassy carbon electrode into a pre-lithiation solution, wherein the pre-lithiation solution comprises a lithium salt and an organic solvent;
• adding the silicon-based active material to the pre-lithiation solution containing the mesh-type copper electrode and the glassy carbon electrode;
• and
• intercalating lithium into the silicon-based active material by performing an oxidation/reduction reaction in the pre-lithiation solution;
• forming a first negative electrode active material layer comprising a carbon-based active material on at least one surface of a negative electrode current collector;
• and
• forming a second negative electrode active material layer comprising the pre-lithiated silicon-based active material on a surface of the first negative electrode active material layer opposite the negative electrode current collector.