ANODE PRE-LITHIATION-PRE-SODIATION METHOD, PRE-LITHIATED AND PRE-SODIATED ANODE, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Disclosed is a method for pre-lithiation/pre-sodiation of a negative electrode, including the steps of: preparing a negative electrode including a negative electrode current collector, and a negative electrode active material layer formed on at least one surface of the negative electrode current collector; applying and drying a composition containing a lithium metal powder, a polymer binder and a dispersion medium onto the negative electrode active material layer to form a lithium metal layer; applying and drying a composition containing a sodium metal powder, a polymer binder and a dispersion medium onto the lithium metal layer to form a sodium metal layer; and dipping the negative electrode having the lithium metal layer and the sodium metal layer in an electrolyte for pre-lithiation/pre-sodiation. A pre-lithiated/pre-sodiated negative electrode obtained by the method and a lithium secondary battery including the same are also disclosed.