FIELD: power engineering.
SUBSTANCE: invention relates to an energy storage device and can be used in electric vehicles. Energy storage device (100) comprises porous conductive substrate (110); insulating layer (120) in contact with inner surfaces (112) of porous conductive substrate (110); and conductive layer (130) in contact with outer surfaces (122) of insulating layer (120), wherein the insulating layer comprises the first electric power storage layer used to store energy in a polarized configuration by supplying voltage to the porous conductive substrate and the conductive layer, besides, the insulating layer comprises the second electric power storage layer configured able to vary between an electrical insulating configuration and an electrically conductive configuration, wherein the transition from the electrical insulating configuration to the electrically conductive configuration occurs in response to supplying a voltage greater than the threshold voltage to the porous conductive substrate and the conductive layer, herewith the second electric power storage layer is an ionized fluid medium, and the electrically conductive configuration is an ionized configuration formed by supplying a voltage equal to or greater than the breakdown voltage of the second electric power storage layer to the second electric power storage layer.
EFFECT: increasing the capacity of the energy storage device by increasing the contact area of the porous conductive substrate with the insulating layer is the technical result of the invention.
44 cl, 7 dwg
