CN116913697A - High-temperature-resistant anti-aging conductive high-polymer solid electrolytic capacitor - Google Patents
High-temperature-resistant anti-aging conductive high-polymer solid electrolytic capacitor Download PDFInfo
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- CN116913697A CN116913697A CN202310881105.1A CN202310881105A CN116913697A CN 116913697 A CN116913697 A CN 116913697A CN 202310881105 A CN202310881105 A CN 202310881105A CN 116913697 A CN116913697 A CN 116913697A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 31
- 239000007787 solid Substances 0.000 title claims abstract description 26
- 230000003712 anti-aging effect Effects 0.000 title claims abstract description 15
- 229920000642 polymer Polymers 0.000 title description 2
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000004815 dispersion polymer Substances 0.000 claims abstract description 48
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 26
- 239000002019 doping agent Substances 0.000 claims abstract description 23
- 239000002482 conductive additive Substances 0.000 claims abstract description 20
- 239000004734 Polyphenylene sulfide Substances 0.000 claims abstract description 13
- 229920000069 polyphenylene sulfide Polymers 0.000 claims abstract description 13
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000007800 oxidant agent Substances 0.000 claims description 33
- 239000000178 monomer Substances 0.000 claims description 32
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 claims description 26
- 230000001590 oxidative effect Effects 0.000 claims description 25
- 230000000996 additive effect Effects 0.000 claims description 22
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 claims description 12
- 229940005642 polystyrene sulfonic acid Drugs 0.000 claims description 12
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical class OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 10
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical class OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 150000003863 ammonium salts Chemical class 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 230000006866 deterioration Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 4
- 239000007784 solid electrolyte Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical group [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 229920000144 PEDOT:PSS Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/12—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
- C08G61/122—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides
- C08G61/123—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds
- C08G61/126—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds with a five-membered ring containing one sulfur atom in the ring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
- H01G9/0036—Formation of the solid electrolyte layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/025—Solid electrolytes
- H01G9/028—Organic semiconducting electrolytes, e.g. TCNQ
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/10—Definition of the polymer structure
- C08G2261/11—Homopolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/32—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain
- C08G2261/324—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain condensed
- C08G2261/3243—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain condensed containing one or more sulfur atoms as the only heteroatom, e.g. benzothiophene
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses a high-temperature-resistant anti-aging conductive polymer type solid electrolytic capacitor, which comprises a first conductive polymer dispersion liquid of a core package, a second conductive polymer dispersion liquid and a doping agent, wherein the first conductive polymer dispersion liquid of the core package is immersed to form a layer of uniform film which is tightly combined and has high conductivity, the second conductive polymer dispersion liquid added with heat-resistant additives such as polyphenylene sulfide is immersed to form a multi-layer film structure, and finally the doping agent solution is immersed to fill gaps among the conductive polymer, the core package and the self. In the application, the conductive polymer dispersion liquid with two different components is impregnated, the existence of conductive additives such as ethylene glycol, dimethyl sulfoxide and the like improves the conductivity of the film, the addition of heat-resistant additives such as polyphenylene sulfide and the like improves the heat resistance and mechanical property of the film, and meanwhile, the deterioration caused by external oxygen is effectively inhibited to a certain extent, and the two effects cooperate with each other to avoid rapid increase of ESR, so that the electrolytic capacitor can maintain higher capacity and service life even under high-temperature operation.
Description
Technical Field
The application relates to the field of solid electrolytic capacitors, in particular to a high-temperature-resistant anti-aging conductive polymer type solid electrolytic capacitor.
Background
Due to the rapid development of various fields, the application of electrolytic capacitors is becoming more and more widespread. The electrolytic capacitor mainly comprises an anode, a dielectric layer and a cathode. The anode is metal, and an electrolyte oxide film is formed on the surface of the anode by corrosion. Another substance in contact with the dielectric is called the cathode, and its quality affects the performance of the entire capacitor.
The liquid electrolytic capacitor adopts the ionic conduction electrolyte as the actual cathode, has low conductivity, is easy to explode in the use process and has poor safety. Increasingly, solid electrolytic capacitors replace liquid electrolytic capacitors and represent a major share in the application market. The latest solid electrolytic capacitors adopt PEDOT or PEDOT: PSS films as solid electrolytes, can obtain conductivity close to that of conductors, and have high stability.
In a high-temperature working environment, PEDOT can be decomposed due to unstable heating, and the conductivity is weakened. Meanwhile, gaps exist between the solid electrolyte and the dielectric layer as well as between the solid electrolyte and the cathode foil, gaps also exist between the cathode foil and the shell, and defects such as pin holes, pull-out and penetration can occur in the sealing layer of the shell along with the extension of time. The external oxygen greatly accelerates the deterioration of the solid electrolyte layer, increases the ESR of the device, causes the capacity of the electrolytic capacitor to decay rapidly, prolongs the service life and has high rejection rate.
Disclosure of Invention
The application aims to provide a high-temperature-resistant anti-aging conductive high-molecular solid electrolytic capacitor, which solves the problems that the existing solid electrolytic capacitor is not high-temperature-resistant and has high rejection rate.
In order to achieve the above purpose, the present application provides the following technical solutions: a high temperature resistant anti-aging conductive polymer type solid electrolytic capacitor comprises a core package, a conductive polymer dispersion liquid I, a conductive polymer dispersion liquid II and a doping agent;
the conductive polymer dispersion liquid I comprises an EDOT monomer, an aqueous solution of polystyrene sulfonic acid with the molecular weight of 75000, an oxidant and a conductive additive, wherein the weight ratio of the EDOT monomer to the conductive additive to the oxidant is 30-35:6-30:35-40;
the conductive polymer dispersion liquid comprises EDOT monomer, aqueous solution of polystyrene sulfonic acid with molecular weight of 75000, oxidant and heat-resistant additive, wherein the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30-35:42-54:35-40.
The application further improves that: the preparation method comprises the following steps:
A. adding the EDOT monomer into a polystyrene sulfonic acid aqueous solution to form a monomer solution;
B. adding a conductive additive and an oxidant into the monomer solution to form a conductive polymer dispersion liquid I for standby;
C. repeating the step A, and adding a heat-resistant additive and an oxidant into the monomer solution to form conductive polymer dispersion liquid II for later use;
D. b, the core contains the conductive polymer dispersion liquid I obtained in the soaking step B, and is dried;
E. d, the core obtained in the step D comprises the conductive polymer dispersion liquid II obtained in the soaking step C, and is dried;
F. and E, the core obtained in the step E contains the dip doping agent and is dried.
The application further improves that: the core package is composed of anode foil, dielectric layer and cathode foil, the dielectric layer is an insulating oxide layer obtained by oxidizing the anode foil; the conductive polymer dispersion liquid is impregnated to contain a conductive polymer layer inside, a heat-resistant additive and an oxidant are added into part of the conductive polymer layer to form a heat-resistant reinforced conductive polymer layer, and part of the heat-resistant reinforced conductive polymer layer is impregnated with a dopant to form a dopant layer.
The application further improves that: the conductive additive is at least one of ethylene glycol and dimethyl sulfoxide.
The application further improves that: the heat-resistant additive is at least one of polyphenylene sulfide and polyimide materials.
The application further improves that: in the conductive polymer dispersion liquid I, the weight ratio of the EDOT monomer to the conductive additive to the oxidant is 30:6:35
The application further improves that: in the conductive polymer dispersion liquid II, the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30:42:35.
The application further improves that: the dopant solute comprises any one or more of ammonium salts of organic acid and inorganic acid, and the solvent is any one or more of methanol, glycol, triethylamine, tributylamine and sulfolane.
The application further improves that: the doping agent solute is the combination of ammonium salts of phthalic acid and pyromellitic acid, and the solvent is the combination of triethylamine, glycol and sulfolane.
Compared with the prior art, the application has the beneficial effects that:
the application uses two conductive polymer dispersion liquid, and one layer of PEDOT which is tightly combined with the core bag and has good conductivity is formed by impregnating the conductive polymer dispersion liquid: the PSS film is immersed in the conductive polymer dispersion liquid II to form a layer of polymer film with high temperature resistance, the existence of high temperature resistant additives such as polyphenylene sulfide improves the mechanical property and the high temperature resistance of the film, and can effectively inhibit deterioration caused by oxygen, particularly the conductivity of the polyphenylene sulfide is improved after the polyphenylene sulfide is oxidized by oxygen, and the influence of oxygen on ESR is further reduced. The conductive polymer dispersion liquid I and II has good stability, high solid content, good mechanical property, heat resistance and conductivity after film formation, and the existence of the doping agent improves the pressure resistance. The preparation method disclosed by the application is simple in preparation process, easy to operate and good in controllability, effectively relieves the deterioration caused by oxygen and the decomposition caused by high temperature, is suitable for mass production, improves the temperature resistance and safety of the prepared conductive polymer type solid electrolytic capacitor, and reduces the rejection rate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present application;
reference numerals in the drawings: 1-an anode foil; a 2-dielectric layer; 3-a conductive polymer layer; 4-a heat-resistant reinforced conductive polymer layer; a 5-dopant layer; 6-cathode foil.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment provides a technical scheme:
example a
The solid electrolytic capacitor comprises a core package, a first conductive polymer dispersion liquid, a second conductive polymer dispersion liquid and a doping agent, wherein the first conductive polymer dispersion liquid comprises an EDOT monomer, a polystyrene sulfonic acid aqueous solution with the molecular weight of 75000, a conductive additive and an oxidizing agent, and the weight ratio of the EDOT monomer to the conductive additive to the oxidizing agent is 30:6:35. The conductive polymer dispersion liquid comprises EDOT monomer, polystyrene sulfonic acid aqueous solution with molecular weight of 75000, heat-resistant additive and oxidant, wherein the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30:42:35. The conductive additive is dimethyl sulfoxide, and the heat-resistant additive is polyphenylene sulfide or polyimide. The oxidizing agent is selected from potassium persulfate. Dopants include pyromellitic acid, ammonium salts of phthalic acid, triethylamine, ethylene glycol and sulfolane.
Example b
A conductive polymer type solid electrolytic capacitor comprises a core package, a first conductive polymer dispersion liquid, a second conductive polymer dispersion liquid and a doping agent, wherein the first conductive polymer dispersion liquid comprises an EDOT monomer, a polystyrene sulfonic acid aqueous solution with the molecular weight of 75000, a conductive additive and an oxidizing agent, and the weight ratio of the EDOT monomer to the conductive additive to the oxidizing agent is 30:15:35. The conductive polymer dispersion liquid comprises EDOT monomer, polystyrene sulfonic acid aqueous solution with molecular weight of 75000, heat-resistant additive and oxidant, wherein the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30:45:35. The conductive additive is dimethyl sulfoxide, and the heat-resistant additive is polyphenylene sulfide or polyimide. The oxidizing agent is selected from potassium persulfate. Dopants include pyromellitic acid, ammonium salts of phthalic acid, triethylamine, ethylene glycol and sulfolane.
Example c
A conductive polymer type solid electrolytic capacitor comprises a core package, a first conductive polymer dispersion liquid, a second conductive polymer dispersion liquid and a doping agent, wherein the first conductive polymer dispersion liquid comprises an EDOT monomer, a polystyrene sulfonic acid aqueous solution with the molecular weight of 75000, a conductive additive and an oxidizing agent, and the weight ratio of the EDOT monomer to the conductive additive to the oxidizing agent is 30:30:35. The conductive polymer dispersion liquid comprises EDOT monomer, polystyrene sulfonic acid aqueous solution with molecular weight of 75000, heat-resistant additive and oxidant, wherein the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30:54:35. The conductive additive is dimethyl sulfoxide, and the heat-resistant additive is polyphenylene sulfide or polyimide. The oxidizing agent is selected from potassium persulfate. Dopants include pyromellitic acid, ammonium salts of phthalic acid, triethylamine, ethylene glycol and sulfolane.
The application uses two conductive polymer dispersion liquid, and one layer of PEDOT which is tightly combined with the core bag and has good conductivity is formed by impregnating the conductive polymer dispersion liquid: the PSS film is immersed in the conductive polymer dispersion liquid II to form a layer of polymer film with high temperature resistance, and the existence of high temperature resistant additives such as polyphenylene sulfide improves the mechanical property and the high temperature resistance of the film, and can effectively inhibit deterioration caused by oxygen, especially the conductivity of the polyphenylene sulfide is improved after the polyphenylene sulfide is oxidized by oxygen, so that the influence on ESR is further reduced. The conductive polymer dispersion liquid has high solid content and high stability, and the synergistic effect of the heat-resistant additive improves the mechanical property and heat resistance after film formation, and the doping agent is further used for doping the film, so that the pressure resistance is improved to a certain extent. The preparation method disclosed by the application is simple in preparation process, easy to operate, good in controllability, suitable for mass production, capable of improving the temperature resistance and safety of the prepared conductive polymer type solid electrolytic capacitor and reducing the rejection rate.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A high temperature resistant anti-aging conductive polymer type solid electrolytic capacitor is characterized in that: comprises a core package, a first conductive polymer dispersion liquid, a second conductive polymer dispersion liquid and a doping agent;
the conductive polymer dispersion liquid I comprises an EDOT monomer, an aqueous solution of polystyrene sulfonic acid with molecular weight of 75000, an oxidant and a conductive additive, wherein the weight ratio of the EDOT monomer to the conductive additive to the oxidant is 30-35:6-30:35-40;
the conductive polymer dispersion liquid comprises an EDOT monomer, an aqueous solution of polystyrene sulfonic acid with molecular weight of 75000, an oxidant and a heat-resistant additive, wherein the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30-35:42-54:35-40.
2. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: the preparation method comprises the following steps:
A. adding the EDOT monomer into a polystyrene sulfonic acid aqueous solution to form a monomer solution;
B. adding a conductive additive and an oxidant into the monomer solution to form a conductive polymer dispersion liquid I for standby;
C. repeating the step A, and adding a heat-resistant additive and an oxidant into the monomer solution to form conductive polymer dispersion liquid II for later use;
D. b, the core contains the conductive polymer dispersion liquid I obtained in the soaking step B, and is dried;
E. d, the core obtained in the step D comprises the conductive polymer dispersion liquid II obtained in the soaking step C, and is dried;
F. and E, the core obtained in the step E contains the dip doping agent and is dried.
3. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: the core package is composed of an anode foil (1), a dielectric layer (2) and a cathode foil (6), wherein the conductive polymer dispersion liquid is impregnated into the core package to enable the conductive polymer dispersion liquid to contain the conductive polymer layer (3), a heat-resistant additive and an oxidant are added into part of the conductive polymer layer (3) to form a heat-resistant reinforced conductive polymer layer (4), and part of the heat-resistant reinforced conductive polymer layer (4) is impregnated with the dopant to form a dopant layer (5).
4. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: the conductive additive is at least one of ethylene glycol and dimethyl sulfoxide.
5. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: the heat-resistant additive is at least one of polyphenylene sulfide and polyimide materials.
6. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: in the first conductive polymer dispersion liquid, the weight ratio of the EDOT monomer to the conductive additive to the oxidant is 30:6:35.
7. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: in the conductive polymer dispersion liquid II, the weight ratio of the EDOT monomer to the heat-resistant additive to the oxidant is 30:42:35.
8. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor according to claim 1, wherein: the dopant solute comprises any one or more of ammonium salts of organic acid and inorganic acid, and the solvent is any one or more of methanol, glycol, triethylamine, tributylamine and sulfolane.
9. The high temperature resistant, anti-aging, conductive polymer type solid electrolytic capacitor as claimed in claim 8, wherein: the doping agent solute is the combination of ammonium salts of phthalic acid and pyromellitic acid, and the solvent is the combination of triethylamine, glycol and sulfolane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310881105.1A CN116913697A (en) | 2023-07-18 | 2023-07-18 | High-temperature-resistant anti-aging conductive high-polymer solid electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310881105.1A CN116913697A (en) | 2023-07-18 | 2023-07-18 | High-temperature-resistant anti-aging conductive high-polymer solid electrolytic capacitor |
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| CN116913697A true CN116913697A (en) | 2023-10-20 |
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| CN202310881105.1A Pending CN116913697A (en) | 2023-07-18 | 2023-07-18 | High-temperature-resistant anti-aging conductive high-polymer solid electrolytic capacitor |
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