NOVELTY - Secondary battery (5) comprises: an electrode assembly (20) arranged to contain electrolyte; a sealing tape arranged to at least partially extend around an outer surface of electrode assembly; and a can (10) arranged to house the electrode assembly, where the: sealing tape comprises an adhesive layer and a base layer (51); base layer is formed on an outer surface of adhesive layer and has directionality prior to contact with electrolyte is arranged to cause the directionality of base layer to be reduced so as to cause at least one portion of base layer to contact an inner surface of the can.    USE - Used as a secondary battery.    ADVANTAGE - The secondary battery efficiently prevent the electrode assembly from being freely moved.    DETAILED DESCRIPTION - Secondary battery (5) comprises: an electrode assembly (20) arranged to contain the electrolyte; a sealing tape arranged to at least partially extend around an outer surface of the electrode assembly; and a can (10) arranged to house the electrode assembly, where: sealing tape comprises an adhesive layer and a base layer (51); base layer is formed on an outer surface of the adhesive layer and has directionality prior to contact with the electrolyte is arranged to cause the directionality of the base layer to be reduced so as to cause at least one portion of the base layer to contact an inner surface of the can; prior to contact with the electrolyte the base layer is arranged to cover a first area of the outer surface of the adhesive layer; in the presence of electrolyte the base layer is arranged to cover a second area of the outer surface of the adhesive layer; and second area is smaller than the first area. An INDEPENDENT CLAIM is also included for manufacturing the secondary battery, comprising: providing the electrode assembly; attaching the sealing tape to the electrode assembly so that the sealing tape at least partially extends around an outer surface of the electrode assembly in a winding direction; placing the electrode assembly in a can arranged to house the electrode assembly; and providing electrolyte to the electrode assembly, where contact with the electrolyte is arranged to cause the base layer to change shape such that the base layer shrinks so to cover a second area of the outer surface of the adhesive layer, and the base layer shrinking so to cover the second area of the adhesive layer causes first portions of the base layer to contact an inner surface of the can.    DESCRIPTION OF DRAWING(S) - The figure illustrates an exploded perspective view of the secondary battery.    Secondary battery (5)    Can (10)    Electrode assembly (20)    Base layer/sheet (51)    Cap assembly (100)