Nonaqueous electrolyte secondary battery

摘要

A nonaqueous electrolyte secondary battery including a battery case that is not corroded easily even at the time of over-discharging is provided. The nonaqueous electrolyte secondary battery includes a battery case 11 serving as a negative electrode terminal, and a positive electrode 13, a negative electrode 14, a separator 15 and a nonaqueous electrolyte that are enclosed in the battery case 11. The positive electrode 13 and the negative electrode 14 respectively include an active material that stores and releases lithium reversibly. The battery case 11 includes a case 11a formed of a metal plate having iron as a principal component and a metal layer 11b formed at least in a part of an inner surface of the case 11a, and the metal layer 11b includes a metallic element M that dissolves in the nonaqueous electrolyte at a lower potential than iron and at a higher potential than lithium.