| abstract |
The present invention provides a cable-type secondary battery. The cable-type secondary battery includes: an internal electrode support; - an outer electrode composite is helically wound around the outer side of the inner electrode support, wherein the inner electrode - the separator is formed in a manner of integrally compressing the inner electrode, the separator for preventing short-circuiting of the electrodes, and the outer electrode ‑External electrode complex. According to one embodiment of the present invention, the electrode and the separator are integrated, so that the separator in close contact with the electrode absorbs the electrolyte to induce a uniform supply of the electrolyte to the outer electrode active material layer, thereby improving Stability and performance of a cable-type secondary battery. In addition, the cable-type secondary battery has a sheet-like electrode and does not include a wire-type current collector having high resistance, whereby the resistance of the cable-type secondary battery is reduced and performance of the battery can be improved. In addition, since the cable-type secondary battery has an internal electrode support in an open structure, and the sheet electrode-separator complex is spirally wound like a spring structure, it is possible to maintain a linear shape and relax stress caused by an external force . |