Patent ID: 6881233

Claim:
A pocketed electrode plate for use in a lithium ion secondary battery manufactured by an electrode-stacking manner, the pocketed electrode plate comprising: an electrode plate which has a coating layer of an electrode active material and a non-coated projection portion, the electrode active material being capable of reversibly inserting and extracting lithium ions; separating membranes which cover both sides of the electrode plate while exposing only the non-coated projection portion; and an insulating polymer film having an adhesive component on both surfaces thereof, the insulating polymer film being placed adjacent to edges of the electrode plate but not covering any portion of the coating layer of the electrode plate, wherein the insulating polymer film is sandwiched between the two separating membranes, and wherein the interface between the insulating polymer film and separating membrane is bonded by a thermal fusion of the adhesive component on the both surfaces of the insulating polymer film, and wherein the separating membranes are in direct contact with the both sides of the electrode plate.