Method for fabrication of lithium metal secondary battery comprising lithium electrode

A method for manufacturing a lithium metal secondary battery comprising an electrode assembly introduced into a battery case, wherein the electrode assembly comprises a lithium metal electrode as a negative electrode, a positive electrode active material contained in a positive electrode and a separator between the negative electrode and the positive electrode, the method comprising:

• forming a protective layer on the lithium metal electrode,
• introducing the electrode assembly into the battery case,
• injecting an electrolyte into the battery case so as to obtain the lithium metal secondary battery,
• activating the lithium metal secondary battery, wherein during the activating the lithium metal secondary battery, discharging the lithium metal secondary battery before an initial charge so that stripping of a surface of the lithium metal electrode occurs while the protective layer formed on the lithium metal electrode is maintained and a lithium metal is plated between the protective layer and the lithium metal electrode on the portion where the stripping occurs during the initial charging,
• wherein the positive electrode active material comprises lithium metal oxide, and
• the protective layer prevents a chemical reaction between an electrolyte and the lithium metal electrode.