Patent ID: 8703343

Claim:
A method for producing a lithium secondary battery comprising a negative electrode having a negative electrode active material layer containing a carbonaceous negative electrode active material and a first binder on a surface of a negative electrode current collector, and a protective layer containing an insulating filler and a second binder on the negative electrode active material layer, the method comprising: coating and compressing a composition for forming a negative electrode active material layer containing the carbonaceous negative electrode active material onto the negative electrode current collector, to prepare a negative electrode raw material on which is formed the negative electrode active material layer, and configuring the lithium secondary battery so that an initial capacity ratio (N/P) of an initial capacity of the negative electrode raw material (N [mAh/cm 2 ]) to an initial capacity of the positive electrode (P [mAh/cm 2 ]) is 1.0 to 3.0, wherein a ratio (T 1 /T 2 ) of a thickness (T 1 ) of the negative electrode active material layer after coating the composition to a thickness (T 2 ) of the negative electrode active material layer after compressing, is 2.4 to 3.5.