Electrode for secondary battery, its preparation, and a secondary battery and type secondary battery comprising the same

The present invention relates to a secondary battery electrode preparation, and comprising the same and a secondary battery type secondary battery. The present invention provides a sheet-form electrode for secondary battery, comprising: a current collector; an electrode active material layer formed on one surface of the current collector; and is formed in the top surface of the first active material layer of the electrode a porous supporting layer. Electrode for secondary battery according to the present invention has a support layer on at least one surface thereof, display surprisingly improved flexibility so that even if a strong external force is applied to the electrodes, is still possible to prevent the electrode active material layer is detached from the current collector, thereby preventing the battery capacity decrease and increase the cycle life characteristics of the battery. In addition, the porous support layer may be introduced into the electrolytic solution satisfactorily electrode active material layer, and the electrolytic solution can flow into the pores of the porous supporting layer is increased to suppress the resistance of the battery, thereby preventing deterioration of battery performance.