BATTERY CELL, BATTERY MODULE, AND METHOD OF PREPARING THE BATTERY CELL

The present disclosure relates to a battery cell with improved battery durability and battery lifetime, a method of preparing the battery cell, and a battery module including the battery cell. Specifically, the battery cell may include a cell case having an accommodation space; an electrode assembly which is accommodated in the accommodation space and includes a plurality of electrodes, an electrode tab formed on at least one side of each of the plurality of electrodes, and a separator disposed between the plurality of electrodes; a gel electrolyte which contains a first molarity of a first lithium salt and is accommodated in the accommodation space while surrounding the electrode tab; and a liquid electrolyte which contains a second molarity, which is lower than the first molarity, of a second lithium salt and is accommodated between the plurality of electrodes.