Supercapacitor

Abstract

The present application discloses a supercapacitor, which includes a capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode, an electrolyte impregnating the capacitor element, a housing for containing the capacitor element and the electrolyte, and a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing a guide pin of the positive electrode and a guide pin of the negative electrode to be inserted, respectively, and at least a part of the surface of an aluminum stem disposed in the through hole of the guide pin of the negative electrode is covered with a polymer coating. The present application further discloses a method for forming the supercapacitor, and the use of the polymer coating coated on the surface of the aluminum stem of the guide pin of the negative electrode in suppressing alkaline creep of the negative electrode in the supercapacitor.

Description

[Technical field]

[0001] The present application relates to a supercapacitor, a method for forming a supercapacitor, and the use of a polymer coating on the surface of an aluminum stem in a guide pin of a negative electrode in suppressing alkaline creep of the negative electrode in a supercapacitor. [Background technology]

[0002] Supercapacitors generally use a solution of organic ammonium salts as the electrolyte. According to the basic principle of supercapacitors, when a supercapacitor is being charged, positively charged ammonium ions (basic) migrate to the surface of the negative electrode to form a double-layer capacitor. Continuous application of voltage and high temperature accelerate the formation of some highly basic substances. These highly basic substances easily migrate on the metal surface, which is commonly known as "alkaline creep". In conventional guide pin type capacitors, the sealing of the guide pin hole relies solely on the deformation of the rubber plug caused by the middle constriction of the aluminum shell pressing against the aluminum stem of the guide pin. The basic substances formed on the negative electrode can leak out of the capacitor along the aluminum stem of the guide pin. This causes the pH in the solder joints and leads to rise to around 11, causing corrosion. More seriously, when the basic substances absorb moisture, they form a conductive alkaline solution, which flows into the circuit board soldered to the capacitor, corroding the circuit board and causing a short circuit.

[0003] Therefore, there is a strong need to develop a novel supercapacitor that can effectively suppress the alkaline creep of the negative electrode. Summary of the Invention [Means for solving the problem]

[0004] In order to address the problems described above, a first aspect of the present application provides a method for detecting a cellular signal from a patient using a cellular telephone. A capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode; an electrolyte for impregnating the capacitor element; a housing for containing the capacitor element and the electrolyte; a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing a positive electrode guide pin and a negative electrode guide pin to be inserted, A supercapacitor is provided, in which at least a portion of a surface of an aluminum stem disposed in a through hole of a negative electrode guide pin is covered with a polymer coating.

[0005] A second aspect of the present application provides a method of forming a supercapacitor, the method comprising: forming a polymer coating on at least a portion of a surface of an aluminum stem of a guide pin of a negative electrode; and inserting the negative electrode guide pin into the through hole so that the aluminum stem of the negative electrode guide pin is positioned inside the through hole and fits tightly with the inner wall of the through hole.

[0006] A third aspect of the present application provides for the use of a polymer coating coated on the surface of the aluminum stem of the guide pin of the negative electrode in inhibiting alkaline creep of the negative electrode in a supercapacitor.

[0007] In a preferred implementation, the polymer coating according to the first, second and third aspects described above is formed by a polymer adhesive.

[0008] The present application changes the surface condition of metallic aluminum by covering the surface of the aluminum stem of the negative electrode guide pin with a polymer coating, thereby slowing down the migration of alkaline substances on the aluminum surface, thereby effectively inhibiting alkaline creep and reducing leakage in the negative electrode guide pin of the capacitor. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic structural diagram of a supercapacitor according to embodiment 1 of the present application; FIG. [Diagram 2] FIG. 2 is a schematic structural diagram of the positive electrode guide pin and the negative electrode guide pin of the supercapacitor in embodiment 1 of the present application. [Diagram 3] FIG. 2 is a schematic structural diagram of a guide pin coated with adhesive in the first embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The contents of the present application may be more readily understood by reference to the following detailed description of the preferred implementations of the present application and the embodiments contained therein.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In case of conflict, the definitions presented herein shall prevail.

[0012] The terms "including," "comprising," "having," "containing" or other variations thereof are intended to cover a non-exclusive inclusion.

[0013] When an equivalent amount, concentration, or other value or parameter is given as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper or preferred value with any range lower or preferred value, regardless of whether such ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, this should be interpreted as including "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", and similar ranges. When a numerical range is described herein, the range is intended to include its endpoints and all integers and fractions within the range, unless otherwise indicated.

[0014] Furthermore, the indefinite articles "a" and "an" preceding an element or component in this application do not limit the quantity (i.e., number of occurrences) of the element or component. Thus, "a" or "an" should be interpreted as including one or at least one, and the singular form of an element or component also includes the plural, unless the quantity clearly indicates the singular form.

[0015] The term "guide pin" as used in this application includes a lead, an aluminum stem, and an aluminum tang, and the lead is soldered to one end of the aluminum stem, and the other end of the aluminum stem is connected to the aluminum tang. In this application, as conventionally used in the prior art, the positive electrode guide pin and the negative electrode guide pin are set so that when inserted into the through hole, the aluminum stem is located inside the through hole and fits tightly against the inner wall of the through hole.

[0016] The term "polymeric coating" as used in this application refers to a coating formed by applying an organic polymer to the surface of a substrate.

[0017] The term "polymeric adhesive" as used in this application refers to adhesive materials based on natural or synthetic polymeric compounds.

[0018] The term "thermosetting resin adhesive" as used in this application refers to an adhesive that uses a thermosetting resin containing a reactive group as the adhesive material. When a curing agent is added or heat is applied, the molecules of the liquid adhesive material are further polymerized and crosslinked into a three-dimensional network structure to form an insoluble and insoluble solid adhesive layer to achieve the purpose of adhesion. It can be cured at room temperature or by heating, the former is called room temperature curing adhesive and the latter is called heat curing adhesive.

[0019] The term "photocurable resin adhesive" as used in this application refers to a resin adhesive that cures quickly upon irradiation with light to achieve purposes such as adhesion, sealing, and fixing.

[0020] The term "epoxy resin adhesive" as used in this application refers to an adhesive prepared using epoxy resin as the base material.

[0021] The term "polyurethane adhesive" as used in this application refers to an adhesive prepared using polyurethane as the base material.

[0022] Capacitor The first aspect of the present application is A capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode; an electrolyte for impregnating the capacitor element; a housing for containing the capacitor element and the electrolyte; a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing a positive electrode guide pin and a negative electrode guide pin to be inserted, A supercapacitor is provided, in which at least a portion of a surface of an aluminum stem disposed in a through hole of a negative electrode guide pin is covered with a polymer coating.

[0023] By covering at least a part of the surface of the aluminum stem of the guide pin of the negative electrode with a polymer coating, the surface state of the metal aluminum can be changed and the migration of alkaline substances on the aluminum surface can be slowed down, thereby effectively suppressing alkaline creep. Specifically, by using the polymer coating, the supercapacitor according to the present application has no alkaline creep within 4,000 hours at 65°C and a constant voltage of 2.7V.

[0024] In one implementation, the polymer coating is coated on a surface that occupies 50% to 100% of the area of ​​the aluminum stem of the negative electrode guide pin. For example, the polymer coating may be coated on a surface occupying an area of ​​the aluminum stem of the negative electrode guide pin selected from the group of 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, and 100%. To achieve optimal effectiveness in inhibiting alkaline creep, the polymer coating is preferably coated on a surface that occupies 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0025] In one implementation, the thickness of the polymer coating is 5-30 μm, preferably 10-20 μm. For example, optional thicknesses of the polymer coating are 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, and 30 μm, preferably 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, and 20 μm.

[0026] In one implementation, the polymer coating is resistant to electrolytes and / or to bases with a pH of 7-14 and / or to temperatures ranging from -40° C. to 180° C. and / or to water. In particular, the polymer coating does not peel off after immersion in an electrolyte or a base solution with a pH of 7-14 for 72 hours.

[0027] In one implementation, the polymer coating is formed by a polymer adhesive.

[0028] In one implementation, the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0029] In one implementation, the resin adhesive is selected from a thermosetting resin adhesive and / or a light-curing resin adhesive. Preferably, the light-curing resin adhesive that can be used in the present application is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0030] In one implementation, the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0031] In one implementation, the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0032] Methods for forming a supercapacitor A second aspect of the present application provides a method of forming a supercapacitor, the method comprising: forming a polymer coating on at least a portion of a surface of an aluminum stem of a guide pin of a negative electrode; and inserting the negative electrode guide pin into the through hole so that the aluminum stem of the negative electrode guide pin is positioned inside the through hole and fits tightly with the inner wall of the through hole.

[0033] In one implementation, the polymer coating is coated on a surface that occupies 50% to 100% of the area of ​​the aluminum stem of the negative electrode guide pin. For example, the polymer coating may be coated on a surface occupying an area of ​​the aluminum stem of the negative electrode guide pin selected from the group of 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, and 100%. Preferably, the polymer coating is coated on a surface occupying 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0034] In one implementation, the thickness of the polymer coating is 5-30 μm, preferably 10-20 μm. For example, optional thicknesses of the polymer coating are 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, and 30 μm, preferably 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, and 20 μm.

[0035] In one implementation, the polymer coating is resistant to electrolytes and / or to bases with a pH of 7-14 and / or to temperatures ranging from -40° C. to 180° C. and / or to water. In particular, the polymer coating does not peel off after immersion in an electrolyte or a base solution with a pH of 7-14 for 72 hours.

[0036] In one implementation, the polymer coating is formed by a polymer adhesive.

[0037] In one implementation, the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0038] In one implementation, the resin adhesive is selected from a thermosetting resin adhesive and / or a light-curing resin adhesive. Preferably, the light-curing resin adhesive that can be used in the present application is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0039] In one implementation, the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0040] In one implementation, the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0041] In one implementation, the application of the polymer coating is accomplished by spraying uniformly through a coating guide pin.

[0042] Use of polymer coatings A third aspect of the present application provides for the use of a polymer coating coated on the surface of the aluminum stem of the guide pin of the negative electrode in inhibiting alkaline creep of the negative electrode in a supercapacitor.

[0043] In one implementation, the polymer coating is coated on a surface that occupies 50% to 100% of the area of ​​the aluminum stem of the negative electrode guide pin. For example, the polymer coating may be coated on a surface occupying an area of ​​the aluminum stem of the negative electrode guide pin selected from the group of 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, and 100%. Preferably, the polymer coating is coated on a surface occupying 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0044] In one implementation, the thickness of the polymer coating is 5-30 μm, preferably 10-20 μm. For example, optional thicknesses of the polymer coating are 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, and 30 μm, preferably 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, and 20 μm.

[0045] In one implementation, the polymer coating is resistant to electrolytes and / or to bases with a pH of 7-14 and / or to temperatures ranging from -40° C. to 180° C. and / or to water. In particular, the polymer coating being resistant to electrolytes and / or to bases with a pH of 7-14 means that the polymer coating does not peel off after being immersed in an electrolyte or a base solution with a pH of 7-14 for 72 hours.

[0046] In one implementation, the polymer coating is formed by a polymer adhesive.

[0047] In one implementation, the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0048] In one implementation, the resin adhesive is selected from a thermosetting resin adhesive and / or a light-curing resin adhesive. Preferably, the light-curing resin adhesive that can be used in the present application is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0049] In one implementation, the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0050] In one implementation, the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0051] This application includes the following implementations:

[0052] Implementation 1. A supercapacitor, comprising: A capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode; an electrolyte for impregnating the capacitor element; a housing for containing the capacitor element and the electrolyte; a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing a positive electrode guide pin and a negative electrode guide pin to be inserted, A supercapacitor, wherein at least a portion of a surface of an aluminum stem disposed in a through hole of a negative electrode guide pin is covered with a polymer coating.

[0053] Implementation 2. The supercapacitor of implementation 1, wherein the supercapacitor does not have alkaline creep within 4,000 hours at 65° C. and a constant voltage of 2.7 V.

[0054] Implementation 3. The supercapacitor of implementations 1 or 2, wherein the polymer coating is coated on a surface that occupies 50% to 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

[0055] Implementation 4. The supercapacitor of implementation 3, wherein the polymer coating is coated on a surface occupying 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0056] Implementation 5. The supercapacitor of implementation 1 or 2, wherein the thickness of the polymer coating is 5 to 30 μm.

[0057] Implementation 6. The supercapacitor of implementation 5, wherein the polymer coating has a thickness of 10 to 20 μm.

[0058] Implementation 7. The supercapacitor of implementations 1 or 2, wherein the polymer coating is resistant to the electrolyte, and / or resistant to a base with a pH of 7 to 14, and / or resistant to temperatures in the range of -40°C to 180°C, and / or resistant to water.

[0059] Implementation 8. The supercapacitor of implementations 1 or 2, wherein the polymer coating does not peel off after being immersed in an electrolyte or a basic solution of PH 7-14 for 72 hours.

[0060] Implementation 9. The supercapacitor of implementation 1 or 2, wherein the polymer coating is formed by a polymer adhesive.

[0061] Implementation 10. The supercapacitor of implementation 9, wherein the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0062] Implementation 11. The supercapacitor of implementation 10, wherein the resin adhesive is selected from a thermosetting resin adhesive and / or a photocurable resin adhesive, preferably the photocurable resin adhesive is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0063] Implementation 12. The supercapacitor of implementation 10, wherein the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0064] Implementation 13. The supercapacitor of implementation 10, wherein the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0065] Implementation 14. A method for forming a supercapacitor, comprising: forming a polymer coating on at least a portion of a surface of an aluminum stem of a guide pin of a negative electrode; and inserting a guide pin of the negative electrode into the through hole such that an aluminum stem of the guide pin of the negative electrode is positioned inside the through hole and fits tightly with an inner wall of the through hole.

[0066] Implementation 15. The method of implementation 14, wherein the polymer coating is formed on a surface that occupies 50% to 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0067] Implementation 16. The method of implementation 15, wherein the polymer coating is formed on a surface occupying 100% of the area of ​​the aluminum stem of the negative electrode guide pin.

[0068] Implementation 17. The method of implementation 14 or 15, wherein the thickness of the polymer coating is 5 to 30 μm.

[0069] Implementation 18. The method of implementation 17, wherein the thickness of the polymer coating is 10 to 20 μm.

[0070] Implementation 19. The method of implementation 14 or 15, wherein the polymer coating is resistant to electrolytes, and / or resistant to bases with a pH of 7 to 14, and / or resistant to temperatures in the range of -40°C to 180°C, and / or resistant to water.

[0071] Implementation 20. The method of implementation 14 or 15, wherein the polymer coating does not peel off after immersion in an electrolyte or a basic solution of PH 7-14 for 72 hours.

[0072] Implementation 21. The method of implementation 14 or 15, wherein the polymer coating is formed by a polymer adhesive.

[0073] Implementation 22. The method of implementation 21, wherein the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0074] Implementa- tion 23. The method of implementation 22, wherein the resin adhesive is selected from a thermosetting resin adhesive and / or a light curing resin adhesive, preferably the light curing resin adhesive is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0075] Implementation 24. The method of implementation 22, wherein the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0076] Implementation 25. The method of implementation 22, wherein the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0077] Implementation 26. The method of implementation 14 or 15, wherein the formation of the polymer coating is achieved by uniformly spraying through a coating guide pin.

[0078] Implementation 27. Use of a polymer coating coated on the surface of an aluminum stem in a guide pin of a negative electrode in suppressing alkaline creep of a negative electrode in a supercapacitor.

[0079] Implementation 28. The use of implementation 27, wherein the polymer coating is coated on a surface occupying 50% to 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

[0080] Implementation 29. The use of implementation 28, wherein the polymer coating is coated on a surface occupying 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

[0081] Implementation 30. The use of implementations 27 or 28, wherein the thickness of the polymer coating is 5 to 30 μm.

[0082] Implementation 31. The use of implementation 30, wherein the thickness of the polymer coating is 10 to 20 μm.

[0083] Implementation 32. The use of implementations 27 or 28, wherein the polymer coating is resistant to electrolytes, and / or resistant to bases with a pH of 7 to 14, and / or resistant to temperatures in the range of -40°C to 180°C, and / or resistant to water.

[0084] Implementation 33. The use of implementations 27 or 28, wherein the polymer coating does not peel off after being immersed in an electrolyte or a basic solution of PH 7-14 for 72 hours.

[0085] Implementation 34. The use of implementations 27 or 28, wherein the polymer coating is formed by a polymer adhesive.

[0086] Implementation 35. The use of implementations 27 or 28, wherein the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

[0087] Implementation 36. The use of implementation 35, wherein the resin adhesive is selected from a thermosetting resin adhesive and / or a light curing resin adhesive, preferably the light curing resin adhesive is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

[0088] Implementation 37. The use of implementation 35, wherein the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

[0089] Implementation 38. The use of implementation 35, wherein the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

[0090] Preferred Embodiments Preferred embodiments of the present application are further described in detail below with reference to the accompanying drawings. The following description is illustrative rather than limiting of the present application, and all other similar scenarios shall fall within the scope of protection of the present application.

[0091] EMBODIMENT 1 Referring to FIG. 1, the supercapacitor in this embodiment is: A capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode; an electrolyte for impregnating the capacitor element; a housing for containing the capacitor element and the electrolyte; a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing a positive electrode guide pin 1 and a negative electrode guide pin 2 to be inserted, The positive electrode guide pin and the negative electrode guide pin each include a lead 11, an aluminum stem 12, and an aluminum tang 13 (see FIG. 2 , the lead is soldered to one end of the aluminum stem, and the other end of the aluminum stem is connected to the aluminum tang), and when inserted into the through hole, the aluminum stem is positioned inside the through hole and set so as to fit tightly against the inner wall of the through hole, and it can be seen that the surface of the aluminum stem in the negative electrode guide pin is completely covered with a polymer coating.

[0092] The method for forming the polymer coating includes spraying a polymer adhesive (Loctite 3106 light-curing acrylic adhesive) evenly onto the surface of the aluminum stem of the negative electrode guide pin through the coating guide pin (see FIG. 3 for the structure) to form a polymer coating with a thickness of 16 μm.

[0093] Reference example 1 Same as embodiment 1, except that no polymer coating is applied on the surface of the aluminum stem of the negative electrode guide pin.

[0094] Test results Take 10 supercapacitors of embodiment 1 and 10 supercapacitors of reference example 1. Place these samples simultaneously under an environment of 65°C and a constant voltage of 2.7V, and observe the number of samples with alkaline creep of the negative electrode at 3,000 hours, 4,000 hours, 5,000 hours, 6,000 hours, 7,000 hours, and 8,000 hours.

[0095] The test results are shown in the table below.

[0096] [Table 1]

[0097] As can be seen from Table 1 above, in the supercapacitor samples of embodiment 1, no alkaline creep phenomenon occurs within 4,000 hours, and only one alkaline creep occurs between 4,000 and 5,000 hours (i.e., alkaline creep occurs in 10% of the samples). However, for the supercapacitor samples of reference example 1, two alkaline creeps occur between 3,000 and 4,000 hours, and four alkaline creeps occur between 4,000 and 5,000 hours (i.e., alkaline creep occurs in 40% of the samples). Furthermore, when the test reaches 8,000 hours, all of the supercapacitor samples of reference example 1 have alkaline creep, but there are still five supercapacitor samples of embodiment 1 that do not have alkaline creep (i.e., 50% of the samples do not have alkaline creep). Such results indicate that the present application realizes a novel supercapacitor that can effectively suppress alkaline creep and achieves significant advantageous technical effects.

[0098] The above examples are merely illustrative and are used to explain some of the features of the present disclosure. The appended claims are intended to claim the broadest possible scope, and the embodiments presented herein are merely illustrations of implementations selected according to all possible combinations of embodiments. Therefore, it is the intention of the applicant that the appended claims are not limited to the examples for explaining the features of the present application. As used in the claims, the term "comprising" and its meaning variations logically include different and varying terms, such as, but not limited to, "consisting essentially of" or "consisting of". Where necessary, some numerical ranges are provided, and these ranges also include subranges therein. Although modifications of these ranges are also obvious to those skilled in the art and shall not be considered as provided to the public, these modifications shall also be construed to be included in the appended claims as far as possible. In addition, scientific and technological progress will form possible equivalents or partial replacements that are not currently considered due to imprecise language expressions, and such modifications shall also be construed to be included in the appended claims as far as possible. [Explanation of symbols]

[0099] 1 Positive guide pin 2 Negative guide pin 11 Lead 12 Aluminum stem 13 Aluminum Tongue

Claims

1. A supercapacitor, A capacitor element including a positive electrode, a negative electrode, and a separator sandwiched between the positive electrode and the negative electrode; an electrolyte impregnating the capacitor element; a housing for containing the capacitor element and the electrolyte; a sealing member for sealing an opening of the housing, the sealing member having a through hole for allowing the positive electrode guide pin and the negative electrode guide pin to be inserted, A supercapacitor, characterized in that at least a portion of a surface of an aluminum stem disposed in the through hole of the guide pin of the negative electrode is covered with a polymer coating.

2. 10. The supercapacitor of claim 1, wherein the supercapacitor has no alkaline creep within 4,000 hours at 65°C and a constant voltage of 2.7V.

3. The supercapacitor according to claim 1 or 2, characterized in that the polymer coating is coated on a surface occupying 50% to 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

4. 4. The supercapacitor of claim 3, wherein a polymer coating is coated on the surface occupying 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

5. The supercapacitor according to claim 1 or 2, characterized in that the thickness of the polymer coating is between 5 and 30 μm.

6. The supercapacitor of claim 5, wherein the polymer coating has a thickness of 10-20 μm.

7. 3. The supercapacitor according to claim 1 or 2, characterized in that the polymer coating is resistant to electrolytes and / or is resistant to bases with a pH of 7 to 14 and / or is resistant to temperatures in the range of -40°C to 180°C and / or is resistant to water.

8. The supercapacitor according to claim 1 or 2, wherein the polymer coating does not peel off even after being immersed in an electrolyte or a basic solution having a pH of 7 to 14 for 72 hours.

9. The supercapacitor according to claim 1 or 2, characterized in that the polymer coating is formed by a polymer adhesive.

10. The supercapacitor according to claim 9, characterized in that the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

11. The supercapacitor according to claim 10, characterized in that the resin adhesive is selected from a thermosetting resin adhesive and / or a photocurable resin adhesive.

12. The supercapacitor according to claim 10, characterized in that the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

13. 11. The supercapacitor according to claim 10, wherein the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

14. The supercapacitor of claim 11 , wherein the photocurable resin adhesive is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

15. 1. A method for forming a supercapacitor, comprising: forming a polymer coating on at least a portion of a surface of an aluminum stem of a negative electrode guide pin; inserting the guide pin of the negative electrode into a through hole such that the aluminum stem of the guide pin of the negative electrode is disposed inside the through hole and fits tightly with the inner wall of the through hole; A method comprising:

16. 16. The method of claim 15, wherein the polymer coating is coated on the surface occupying 50% to 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

17. 17. The method of claim 16, wherein a polymer coating is coated on the surface occupying 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

18. The method according to claim 15 or 16, characterized in that the thickness of the polymer coating is between 5 and 30 μm.

19. The method according to claim 18, characterized in that the thickness of the polymer coating is between 10 and 20 μm.

20. 17. The method according to claim 15 or 16, characterized in that the polymer coating is resistant to electrolytes and / or is resistant to bases with a pH of 7 to 14 and / or is resistant to temperatures in the range of -40°C to 180°C and / or is resistant to water.

21. 17. The method according to claim 15 or 16, characterized in that the polymer coating does not peel off after being immersed in an electrolyte or a basic solution with a pH of 7-14 for 72 hours.

22. 17. The method according to claim 15 or 16, characterized in that the polymer coating is formed by a polymer adhesive.

23. 23. The method according to claim 22, characterized in that the polymer adhesive is selected from a resin adhesive and / or a rubber adhesive.

24. 24. The method according to claim 23, characterized in that the resin adhesive is selected from a thermosetting resin adhesive and / or a photocurable resin adhesive.

25. 24. The method according to claim 23, characterized in that the resin adhesive is selected from an epoxy resin adhesive and / or a polyurethane adhesive.

26. 24. The method of claim 23, wherein the rubber adhesive is selected from the group consisting of a butyl rubber adhesive, a silicone rubber adhesive, and a fluororubber adhesive.

27. 25. The method of claim 24, wherein the light curable resin adhesive is selected from the group of Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103, or Loctite 3321.

28. 17. The method according to claim 15 or 16, characterized in that the step of forming a polymer coating is achieved by spraying uniformly through a coating guide pin.

29. Use of a polymer coating coated on the surface of an aluminum stem of a guide pin of a negative electrode in suppressing alkaline creep of said negative electrode in a supercapacitor.

30. The use according to claim 29, characterized in that the polymer coating is coated on a surface occupying 50% to 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

31. 31. The use according to claim 30, characterized in that the polymer coating is coated on the surface occupying 100% of the area of ​​the aluminum stem of the guide pin of the negative electrode.

32. Use according to claim 29 or 30, characterized in that the polymer coating has a thickness of between 5 and 30 μm.

33. Use according to claim 32, characterised in that the polymer coating has a thickness of between 10 and 20 μm.

34. Use according to claim 29 or 30, characterized in that the polymer coating is resistant to electrolytes and / or is resistant to bases with a pH of 7 to 14 and / or is resistant to temperatures in the range of -40°C to 180°C and / or is resistant to water.

35. Use according to claim 29 or 30, characterized in that the polymer coating does not peel off after immersion in an electrolyte or a basic solution with a pH of 7-14 for 72 hours.

36. 31. Use according to claim 29 or 30, characterized in that the polymeric coating is formed by a polymeric adhesive.

37. 37. Use according to claim 36, characterized in that the polymer adhesive is selected from resin adhesives and / or rubber adhesives.

38. 38. Use according to claim 37, characterized in that the resin adhesive is selected from a thermosetting resin adhesive and / or a photocurable resin adhesive.

39. 38. Use according to claim 37, characterized in that the resin adhesive is selected from epoxy resin adhesives and / or polyurethane adhesives.

40. 38. The use according to claim 37, characterized in that the rubber adhesive is selected from the group consisting of butyl rubber adhesives, silicone rubber adhesives and fluororubber adhesives.

41. 39. Use according to claim 38, characterized in that the light curable resin adhesive is selected from the group: Loctite 3106, Loctite 3311, Loctite 3623, Loctite 3103 or Loctite 3321.

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