METHOD FOR MANUFACTURING SECONDARY BATTERY

A method for manufacturing a secondary battery according to the present invention comprises: a step (a) of alternately stacking an electrode and a separator to manufacture an electrode assembly; a step (b) of laminating the electrode assembly at a pressure of 5 kgf/cm2 or more to bond the electrode and the separator, which are provided in the electrode assembly, to each other; a step (c) of accommodating the electrode assembly in a battery case and injecting an electrolyte into the battery case to seal the battery case, thereby manufacturing a preliminary battery; a step (d) of charging and discharging the preliminary battery to activate the preliminary battery; and a step (e) of aging the preliminary battery at a high temperature of 60°C to 100°C for 1 hour to 6 hours to thermally treat the preliminary battery.