| abstract |
The present invention relates to a lithium secondary battery which is prepared as a negative electrode-free battery and forms lithium metal on a negative electrode current collector in the form of a three-dimensional structure by charging. The lithium secondary battery forms lithium metal while being isolated from the atmosphere, and since the generation of the surface oxide layer (native layer) formed on the existing negative electrode is fundamentally blocked and since the negative electrode having the form of a three-dimensional structure The lithium metal is formed on the current collector so that the lithium dendrite suppression effect is excellent, so that the battery efficiency can be improved and the deterioration of the lifetime characteristics can be prevented. |