Electrode, storage battery, power storage device, and electronic apparatus

The invention relates to an electrode, a storage battery, a power storage device, and an electronic apparatus. One embodiment of the present invention provides a power storage device having a large capacity, a power storage device having a high energy density, a power storage device having a high reliability, or a power storage device having a long service life. In addition, one embodiment of the present invention provides an electrode having a large capacity, an electrode having a high energy density, or an electrode having high reliability. One embodiment of the present invention is an electricity storage device comprising a first electrode and a second electrode, the first electrode comprising a first current collector and a first active material layer, the first active material layer comprising active material particles, voids provided around the active material particles, graphene, and a binder, the active material particles being silicon, the voids being provided around the active material particles, th