ELECTRODE ASSEMBLY HAVING HIGH ELONGATION SEPARATOR, AND SECONDARY BATTERY COMPRISING SAME

摘要

Disclosed is a stacking-/folding-type electrode assembly having a structure in which two or more unit cells are wound around a current collector with a sheet-type separation film, each unit cell comprising an anode and a cathode each coated with an electrode bonding agent comprising electrode active material, and a separator interposed therebetween, wherein the cathode has a structure in which a cathode bonding agent is coated on an aluminum foil as a current collector, the anode has a structure in which an anode bonding agent is coated on a metal foil as a current collector, the metal being other than aluminum, the unit cells comprise one or more full-cells and/or bi-cells, the unit cells located at the periphery of the electrode assembly from among the unit cells have a single-sided electrode as the outermost electrode, an electrode bonding agent is coated only on one side facing the separator from among the two sides of the current collector on the single-sided electrodes, and the elongation of the separation film is comparatively greater than the elongation of the separator.