THE METHOD FOR PREPARING SECONDARY BATTERY

摘要

The present invention relates to a method for manufacturing a secondary battery in which an electrode assembly is built into a battery case in a state of being immersed in electrolyte, including: (a) a step for immersing the electrode assembly with a structure in which a separation membrane is interposed between a positive electrode and a negative electrode in the electrolyte; and (b) a step for applying vibration having a frequency of 20 to 100 kHz to the electrolyte where the electrode assembly is immersed. According to the manufacturing method, interface contact properties (wetting) is improved between the electrode assembly and the electrolyte. The secondary battery manufactured by the same has improved electrolyte immersibility, ion conductivity, electron conductivity, and the like, and thus the electrochemical characteristics can be improved.