| abstract |
A separator includes a porous sheet, a heat-resistant porous layer, and a metal lithium layer. The heat-resistant porous layer is provided on one of surfaces of the porous sheet. The metal lithium layer is provided on the surface of the heat-resistant porous layer. The separator is disposed between a negative electrode that includes an active material capable of reversibly storing and emitting lithium ions and having a theoretical capacity density of 400 mAh/g or higher, and a positive electrode capable of reversibly storing and emitting lithium ions, so that the metal lithium layer faces the negative electrode. |