Lithium secondary battery

A lithium secondary battery comprising a wound electrode body having a positive electrode sheet and a negative electrode sheet wound together with a separator therebetween,

• wherein the negative electrode sheet has a structure in which negative active material layers each containing a negative active material and a binder are supported on a sheet-shaped negative electrode collector on a surface facing an outer circumference and a surface facing an inner circumference of the wound electrode body, and
• theoretical capacities of the negative active material per unit area are equalized in the negative active material layer on the outer circumference side and the negative active material layer on the inner circumference side of the negative electrode collector, and at least one of the following conditions is met with respect to at least part of a bent section that is bent toward the inside of the wound electrode body:
• (1) a percentage content of binder of the outer negative active material layer is smaller than a percentage content of binder of the inner negative active material layer;
• and
• (2) a density of the outer negative active material layer is smaller than a density of the inner negative active material layer, and a tap density of the negative active material contained in the outer negative active material layer is smaller than a tap density of the negative active material contained in the inner negative active material layer.