Surface treating method of negative electrode for magnesium secondary battery, negative electrode for magnesium secondary battery, and magnesium secondary battery

A surface treating method of a negative electrode for a magnesium secondary battery, wherein the magnesium secondary battery includes:

• a negative electrode for releasing magnesium ions during discharging and for precipitating elemental magnesium during charging;
• a positive electrode for precipitating a magnesium oxide during the discharging and for releasing magnesium ions during the charging;
• a non-aqueous ion conductor for conducting magnesium ions as conduction species,
• the surface treating method comprising:
• performing an initializing discharge process to initialize the negative electrode, wherein the initializing discharge process includes, by performing discharging, forming a bare surface at a surface of the negative electrode;
• and
• performing a charge process after the initializing discharge process, wherein the charge process includes, by performing charging, forming a magnesium film at the surface of the negative electrode.