| abstract |
The energy density of an electricity storage device is improved. An electricity storage device is provided with an electrode laminate unit, and the electrode laminate unit is composed of positive electrodes and negative electrodes that are alternately laminated. The negative electrode 16 disposed on the outermost part of the electrode laminate unit 12 includes a negative electrode current collector 16b having a large number of through holes 16a, a negative electrode mixture layer 16c applied to one surface of the negative electrode current collector 16b, And a metallic lithium 17a attached to the other surface of the negative electrode current collector 16b. Thus, when the lithium ions are doped, the negative electrode current collector 16b can function as a lithium electrode current collector, so that the lithium electrode current collector can be reduced from the electricity storage device 10, and The energy density can be improved by reducing the volume and weight. [Selection] Figure 2 |