Electrode assembly comprising separator for improving safety and lithium secondary batteries comprising the same

The present invention for a lithium secondary battery comprising the same electrode assembly and comprising a separator for enhanced safety, and more particularly, is coated on the membrane surface, the electrode assembly including a positive electrode, a negative electrode and a separator, a specific voltage in relates to a lithium secondary battery comprising an electrode assembly, and it comprises a gasified material generating gas by electrolysis. An electrode assembly and a lithium secondary battery comprising the same is by including the gasified substance for the electrolysis generates gas in an overcharged state and at the same time improving the safety of the battery, the gasified material according to the invention the membrane surface than the electrode by coating to significantly reduce the degradation of the battery capacity due to suppression of resistance increase, and it is excellent in cycle life characteristics of the battery.