| abstract |
The present invention pertains to a cable-type secondary battery, which extends in a longitudinal direction with a horizontal cross-section of a predetermined shape, comprising: an internal electrode having an internal current collector and an internal electrode active material layer formed by surrounding the outer surface of the internal current collector; a separation layer formed by surrounding the outer surface of the internal electrode to prevent a short circuit of an electrode; and an external electrode which is formed by surrounding the outer surface of the separation layer and has an external electrode active material layer, an external current collector with an open structure, and a conductive paste layer. Since the external electrode including the conductive paste layer and the external current collector with an open structure of the present invention has excellent flexibility, the flexibility of a cable-type secondary battery having the external electrode may be improved. Furthermore, since the conductive paste layer is formed of a light material, the conductive paste layer may contribute to a cable-type second battery being lightweight. |