A discrete metal-insulator-metal (MIM) energy storage component, the energy storage component comprising: a MIM-arrangement comprising: a first electrode layer; a plurality of conductive nanostructures grown from the first electrode layer; a conduction controlling material covering each nanostructure in the plurality of conductive nanostructures and the first electrode layer uncovered by the conductive nanostructures; and a second electrode layer covering the conduction controlling material; a first connecting structure for external electrical connection of the capacitor component; a second connecting structure for external electrical connection of the capacitor component; and an electrically insulating encapsulation material at least partly embedding the MIM-arrangement.