| 摘要 |
Provided is a cable-type secondary battery including an electrode assembly and a cover member surrounding the electrode assembly, the electrode assembly including first and second electrodes of an elongated shape and a separator or an electrolyte layer interposed between the first and second electrodes, each electrode including a current collector having a cross section of a circular, asymmetrical oval or polygonal shape perpendicular to the lengthwise direction thereof and an electrode active material applied onto the surface of the current collector, wherein the cover member has a preset pattern of continuous or discontinuous scratch grooves on the surface thereof. The cable-type secondary battery protects and/or coats the electrode assembly using the improved cover member having the scratch grooves, thereby improving the flexibility of the cable-type secondary battery. |
