Self-healing dielectric structure and method for forming self-healing dielectric structure

Abstract

The invention discloses a self-healing dielectric structure and a method for forming the self-healing dielectric structure, and relates to the field of capacitors and the field of energy. The dielectric structure comprises a gel part and a solution part which directly abut against each other, the gel part is salt ion conductive gel, the solution part is salt ion conductive solution, ions in the gel part and ions in the solution part can be subjected to a metathesis reaction, precipitates are generated, and the salt ion conductive solution is a salt ion conductive solution. And a thin film part of insoluble salt exists on the contact surface of the gel part and the solution part. According to the technical scheme, the dielectric medium has self-healing capability, so that the reliability of the capacitor is improved, and the service life of the capacitor is prolonged.

Description

Technical Field

[0001] The invention relates to the field of capacitors and energy. Background Art

[0002] With the rapid development of new energy, capacitors are used in key links such as energy storage and conversion in the fields of new energy vehicles, solar and wind power generation. These application scenarios require capacitors to have a long life to meet the needs of long-term stable operation of the system and reduce maintenance and replacement costs. Not only that, in fields such as aerospace, military, and medical care that have extremely high reliability requirements, once capacitors in electronic equipment fail, serious consequences may occur. Therefore, it is necessary to increase the life of the capacitor and make it self-healing in order to improve the reliability and stability of the equipment and ensure that it can work normally throughout the entire use process. Summary of the invention

[0003] The purpose of the present invention is to provide a method for forming a healable dielectric structure, through the interaction of a gel part and a solution part, a dielectric structure with a sparingly soluble salt film is formed. The method has the advantages of simple process, low cost and high controllability.

[0004] To achieve the above object, the present invention provides a method for forming a dielectric structure, which specifically comprises the following steps: 1. Forming a gel part: preparing a gel part comprising a salt ion conductive solution and a three-dimensional network structure gel.

[0005] It is further defined that the solute in the salt ion conductive solution in the gel portion can be a calcium salt that is easily soluble in water, such as at least one of CaCl2, Ca(CH3COO)2, CaBr2, CaI2, etc.

[0006] 2. Forming a solution portion: preparing a solution portion containing a salt ion conductive solution.

[0007] It is further defined that the solute in the salt ion conductive solution in the solution portion can be a carbonate that is easily soluble in water, such as at least one of Na2CO3, K2CO3, (NH4)2CO3, etc.

[0008] 3. Formation of an insoluble salt film: The gel part is brought into contact with the solution part, so that the salt ion conductive solutions in both undergo a double decomposition reaction to form an insoluble salt film on the contact surface.

[0009] It is further defined that the salt ion conductive solution in the gel part and the solution part should be a nearly saturated solution to improve the uniformity of film formation.

[0010] It is further defined that the positions of the positive and negative electrodes can be determined based on the effective ions in the gel part and the solution part. If the effective ions in the gel part are cations, the gel part is the positive electrode; if the effective ions in the solution part are anions, the solution part is the negative electrode, and vice versa.

[0011] It is further defined that the effective ions are ions used to form a sparingly soluble salt film.

[0012] 4. Selection of gel structure: The gel with the three-dimensional network structure may contain agar, but is not limited to agar. Other gel materials with similar structural properties may also be used in the present invention.

[0013] Technical Effects The advantages of the present invention are: The sparingly soluble salt film is formed through a simple chemical reaction (double decomposition reaction), which has a simple process and low cost and has self-healing ability.

[0014] The composition of the gel part and the solution part can be flexibly adjusted according to actual needs and has high controllability.

[0015] The formed dielectric structure has stable physical and chemical properties and is suitable for a variety of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram; Figure 2 It is a stereogram; Figure 3 for Figure 2 Floor plan of Figure 4 A process diagram for specific implementation; In the figure: 1. Gel part; 2. Solution part; 3. Electrode where the gel part is located; 4. Electrode where the solution part is located; 5. Insoluble salt film. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the examples of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] The examples of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0020] Add 2 g of agar powder to 100 mL of deionized water and stir with a magnetic stirrer at 95°C until completely dissolved. Add CaCl2 and mix well to make it a nearly saturated solution.

[0021] according to Figure 4 , pour the solution into a tilted mold (hydrophilic type), let it stand at room temperature until it solidifies as gel part 1, and then make the mold horizontal.

[0022] according to Figure 2 , Figure 3 , add a nearly saturated solution of Na2CO3 to submerge it to three quarters of the agar height as solution part 2.

[0023] Then, a graphite electrode 3 (positive electrode) is inserted between the agar and the mold, and a graphite electrode 4 (negative electrode) is placed in the solution.

[0024] When a voltage of six volts is applied, bubbles can be observed to precipitate on the electrode surface. When the device is left to stand for a period of time, it can be observed that the CaCO3 film 5 thickens, allowing the dielectric to reach the optimal thickness while ensuring that it is not broken down. When the electrode no longer produces bubbles, the preparation is complete.

[0025] The advantage of the prepared dielectric film is that when the voltage increases, the film will continue to thicken until it reaches an optimal thickness, thereby reducing the risk of breakdown, and when it is broken down, it can be restored again through a double decomposition reaction.

[0026] It should be noted that, in this application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a certain type..." do not exclude the existence of other identical elements in the process, method, article including the elements.

[0027] The above is only a specific embodiment of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these examples will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these examples shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for forming a dielectric structure: it comprises a gel part for forming the dielectric structure, the gel part comprises a salt ion conductive solution and a gel with a three-dimensional network structure, the contact surface between the gel part and the solution part comprises a film part of an insoluble salt, the solution part comprises a salt ion conductive solution, and the film part of the insoluble salt is an insoluble salt film formed by a double decomposition reaction between the salt ion conductive solution contained in the gel part and the salt ion conductive solution contained in the solution part.

2. The method according to claim 1, wherein the gel portion comprises a certain type of ion conductive solution comprising at least one type of water-soluble calcium salt such as CaCl2, Ca(CH3COO)2, CaBr2, CaI2, etc., wherein the calcium salt is only an example and does not imply a specific type of ion conductive solution.

3. The method according to claim 1, wherein the solution portion contains a certain type of ion conductive solution containing at least one type of water-soluble carbonate such as Na2CO3, K2CO3, (NH4)2CO3, etc., wherein the carbonate is only an example and does not imply a specific type of ion conductive solution.

4. The method according to claim 1, wherein the gel of the three-dimensional network structure comprises agar, wherein the agar is only an example and does not imply a specific type of gel of the three-dimensional network structure, and other materials with similar structural properties can also be used in the present invention. The method according to claim 1 , wherein the ion conductive solution contained in the gel portion is a nearly saturated solution. The method according to claim 1 , wherein the ion-conductive solution contained in the solution portion is a nearly saturated solution.

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