A self-healing capacitor comprises a first electrode, a second electrode, and a dielectric layer disposed between said first and second electrodes and having first surface faced the first electrode and second surface faced the second electrode. At least one of the electrodes can include metal foam. The dielectric layer can have electrically conductive channels that each has an exit point located on the first surface of the dielectric layer and another exit point located on the second surface of the dielectric layer. The electrodes can include local contact breakers each of which is located within the electrode at an interface between the dielectric layer and the electrode and opposite at least one exit point of each electrically conductive channel in the dielectric layer. The local contact breakers can prevent electric current through the conductive channels in dielectric layer.