LITHIUM SECONDARY BATTERY

A lithium secondary battery has a positive electrode, a negative electrode, an electrolyte solution, and a separator. The negative electrode is operated by dissolution and precipitation of metallic lithium, and the electrolyte solution contains a nonaqueous solvent and a lithium salt and has a lithium salt concentration of 3.0 mol/L or more. The separator has a polyolefin microporous film and a porous layer provided on one side or both sides of the polyolefin microporous film and containing a wholly aromatic polyamide.