| abstract |
The present invention relates to: a current collector; An electrode active material layer formed on one surface of the current collector; A porous polymer layer formed on the electrode active material layer; And a porous first support layer formed on the porous polymer layer, a method of manufacturing the same, a secondary battery and a cable-type secondary battery including the same. According to the present invention, the flexibility of the electrode can be greatly improved by introducing the supporting layer on at least one side of the sheet-like electrode, and even when a severe external force acts on the battery, the electrode active material layer is prevented from being detached from the current collector, Can be prevented, and the cycle life characteristic of the battery can be improved. Furthermore, by providing a porous support layer, the electrolyte can be smoothly flowed into the electrode active material layer, and the electrolyte can be impregnated into the pores of the porous support layer, thereby preventing an increase in resistance in the battery, thereby preventing deterioration in performance of the battery. |