| abstract |
A novel electrode is provided. A novel power storage device is provided. Provide an electrode with little deterioration. Provide a high capacity electrode. A power storage device with a long lifetime is provided. A power storage device with little deterioration is provided. A power storage device with high energy density is provided. A highly reliable power storage device is provided. An electrode having a graphene layer, a graphene compound having a substituted or unsubstituted chain group, and an active material, wherein the graphene layer is a chain group via a substituent having silicon. Combined with The active material is in the form of particles, the graphene compound has a region in contact with the active material, the active material has an element A and an element M, and the element A is a group 1 element and a group 2 The element M has one or more selected from manganese and nickel, and the chain group is selected from a carbonyl group, an ester group, a carboxyl group, an ether group, and an epoxy group. Have one or more. [Selection] Figure 1 |