Electrode and power storage device comprising said electrode

A positive electrode comprising:

• a thin metal plate;
• and
• an active material layer on a surface of the thin metal plate, wherein the active material layer includes a plurality of active material particles that have a predetermined average particle diameter, wherein
• the surface of the thin metal plate includes a formation region where the active material layer is located,
• some of the active material particles are at least partially embedded in the formation region,
• among the active material particles that are at least partially embedded in the formation region, an average distance between centers of two adjacent ones of the active material particles is 60% or greater and 98% or less of the average particle diameter.

A power storage device comprising an electrode assembly, wherein

• the electrode assembly includes
• two or more electrodes including at least one positive electrode, wherein each of the electrodes includes a thin metal plate and an active material layer, which includes a plurality of active material particles, the active material particles are formed on a surface of the thin metal plate and have a predetermined average particle diameter, and
• a sheet-like separator located between the electrodes, wherein
• the electrode assembly has a layered structure in which the electrodes and the separator are stacked or wound,
• in at least one positive electrode, the surface of the thin metal plate includes a formation region where the active material layer is located, some of the active material particles are active material particles that are at least partially embedded in the formation region, and
• among the active material particles that are at least partially embedded in the formation region, an average distance between centers of two adjacent ones of the active material particles is 60% or greater and 98% or less of the average particle diameter.