| abstract |
PROBLEM TO BE SOLVED: To provide a power storage device having a large capacity. Alternatively, a power storage device having a high energy density is provided. Alternatively, a highly reliable power storage device is provided. Alternatively, a power storage device having a long life is provided. Alternatively, a large capacitance electrode is provided. Alternatively, an electrode having a high energy density is provided. Alternatively, a highly reliable electrode is provided. A power storage device having a first electrode and a second electrode, the first electrode having a first current collector and a first active material layer, and the first. The active material layer 1 has a particulate active material, voids provided around the particulate active material, graphene, and a binder, and the particulate active material is silicon and is active. The substance and the voids are power storage devices covered with graphene and a binder. [Selection diagram] Fig. 1 |