| abstract |
The present invention relates to: a lithium secondary battery and, more particularly, to a lithium secondary battery using a low-cost cathode active material and having a lithium metal, which is an anode active material, formed on a cathode side; and a manufacturing method therefor. Since the lithium secondary battery according to the present invention uses a complex, in which relatively low-cost Co, CoO, Co 3 O 4 , and Li 2 O are combined, instead of LiCoO 2 , which is a normal cathode active material, production costs are reduced. Additionally, since LiCoO 2 is synthesized through an electrochemical reaction caused by the driving of the battery without separate heat treatment, the manufacturing process is simple, thereby facilitating mass production. In addition, since the lithium secondary battery according to the present invention is coated through a step of forming a lithium thin film on an anode current collector in a state of being shielded from the atmosphere, a surface oxide film can be prevented from being formed on the lithium metal by oxygen and moisture in the atmosphere, resulting in improved life cycle characteristics. |