Self-healing capacitor and methods of production thereof
First Claim
1. A self-healing capacitor comprisinga first electrode,a second electrode, anda dielectric layer disposed between said first and second electrodes and having first surface facing the first electrode and a second surface facing the second electrode,wherein at least one of the electrodes comprises a metal foam, wherein the metal foam is configured to form contact breaker by way of metal evaporation at an end of a conductive channel in the dielectric layer when current flows in the conductive channel as a result of application of a voltage between the first electrode and second electrode.
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Abstract
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.
98 Citations
45 Claims
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1. A self-healing capacitor comprising
a first electrode, a second electrode, and a dielectric layer disposed between said first and second electrodes and having first surface facing the first electrode and a second surface facing the second electrode, wherein at least one of the electrodes comprises a metal foam, wherein the metal foam is configured to form contact breaker by way of metal evaporation at an end of a conductive channel in the dielectric layer when current flows in the conductive channel as a result of application of a voltage between the first electrode and second electrode.
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44. A method of producing a self-healing capacitor, comprising:
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(a) applying an electric voltage across a first electrode and a second electrode that are separated by a dielectric layer, which applying comprises a gradual enhancement of the electric voltage to achieve electric breakdown, wherein at least one of the first and second electrodes includes a metal foam; (b) applying an electric field across the first electrode and the second electrode to form electrically conductive channels with exit points on opposing surfaces of the dielectric layer; (c) applying a current through the first and second electrodes to (i) induce Joule heating in at least one of the first and second electrodes and (ii) form local contact breakers in at least one of the first and second electrodes, which local contact breakers are formed adjacent or in proximity to the exit points; and (d) terminating the application of the current upon formation of the local contact breakers. - View Dependent Claims (45)
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Specification