METHOD FOR CHARGING AND DISCHARGING SECONDARY BATTERY

Methods for charging and discharging a secondary battery are disclosed, which includes: pre-lithiating a negative electrode comprising a silicon-based active material; preparing a secondary battery including the pre-lithiated negative electrode, a positive electrode, a separator, and an electrolyte; and electrochemically charging and discharging the secondary battery with at least one cycle, wherein the electrochemical charging and discharging of the secondary battery is performed so that a difference between a charge SOC and a discharge state of charge (SOC) of the pre-lithiated negative electrode is 18% to 32%.