CN114783776B - Solid aluminum electrolytic capacitor and preparation method thereof - Google Patents
Solid aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN114783776B CN114783776B CN202210371267.6A CN202210371267A CN114783776B CN 114783776 B CN114783776 B CN 114783776B CN 202210371267 A CN202210371267 A CN 202210371267A CN 114783776 B CN114783776 B CN 114783776B
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- pedot
- carbon cloth
- pss
- conductive carbon
- flexible conductive
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- 239000003990 capacitor Substances 0.000 title claims abstract description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- 239000007787 solid Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title description 4
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims abstract description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 57
- 239000004744 fabric Substances 0.000 claims abstract description 57
- 239000000843 powder Substances 0.000 claims abstract description 57
- 239000011888 foil Substances 0.000 claims abstract description 49
- 239000006185 dispersion Substances 0.000 claims abstract description 37
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000005470 impregnation Methods 0.000 claims description 15
- 229920000144 PEDOT:PSS Polymers 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 238000007605 air drying Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 239000007784 solid electrolyte Substances 0.000 abstract description 7
- 229920001940 conductive polymer Polymers 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 10
- 239000007800 oxidant agent Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 description 5
- 239000000178 monomer Substances 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- WHRAZOIDGKIQEA-UHFFFAOYSA-L iron(2+);4-methylbenzenesulfonate Chemical compound [Fe+2].CC1=CC=C(S([O-])(=O)=O)C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 WHRAZOIDGKIQEA-UHFFFAOYSA-L 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 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
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/025—Solid electrolytes
-
- 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
- H01G9/15—Solid electrolytic capacitors
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The solid aluminum electrolytic capacitor comprises a core package and a shell, wherein the core package is arranged in the shell in a sealing way through a rubber plug, the core package comprises an anode foil, electrolytic paper and a cathode foil, a conductive high polymer is formed between the anode foil and the cathode foil, flexible conductive carbon cloth powder is mixed in the conductive high polymer, and the weight of the flexible conductive carbon cloth powder is 5-15% of that of the conductive high polymer. In the invention, the solid electrolyte PEDOT: the PSS is mixed with a flexible conductive carbon cloth powder such that in PEDOT: the PSS dispersion liquid starts to form a conductive polymer film around the flexible conductive carbon cloth powder when being dried to form a film, and under the action of the flexible conductive carbon cloth powder, PEDOT: the stability of the PSS film can be increased, and the PEDOT can be reduced by the flexible conductive carbon cloth powder: the resistance of the PSS film thereby reduces the internal resistance of the solid aluminum electrolytic capacitor.
Description
Technical Field
The invention relates to an aluminum electrolytic capacitor, in particular to a solid aluminum electrolytic capacitor and a preparation method thereof.
Background
The aluminum electrolytic capacitor is the most important and common passive component, and is divided into a liquid aluminum electrolytic capacitor and a solid aluminum electrolytic capacitor, wherein the liquid aluminum electrolytic capacitor is easy to have the phenomenon of liquid leakage caused by the valve opening of an explosion-proof valve because the electrolyte is liquid, and serious explosion can be generated to damage a circuit board. However, the solid aluminum electrolytic capacitor is poor in mechanical properties and is particularly poor in cycling stability because the electrolyte is solid, because electrons move on the solid electrolyte during the charge and discharge cycles of the capacitor, thereby causing expansion and contraction of the solid electrolyte, while the solid electrolyte is poor in mechanical properties, and the solid electrolyte may be detached from the anode foil during hundreds or thousands of cycles, thereby reducing the extraction rate of the capacitor, and disabling the capacitor.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a solid aluminum electrolytic capacitor with good cycling stability and low internal resistance and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a solid-state aluminium electrolytic capacitor, includes core package and shell, the core package passes through rubber buffer seal setting in the shell, its characterized in that: the core package comprises an anode foil, electrolytic paper and a cathode foil, wherein a conductive high polymer is formed between the anode foil and the cathode foil, the conductive high polymer is mixed with flexible conductive carbon cloth powder, and the weight of the flexible conductive carbon cloth powder is 5-15% of that of the conductive high polymer.
In the solid aluminum electrolytic capacitor, preferably, the particle size of the flexible conductive carbon cloth powder is 1 μm to 100 μm.
In the solid aluminum electrolytic capacitor, preferably, the conductive high molecular polymer includes PEDOT: and the molecular weight of the PEDOT is larger than that of the PSS.
In the solid aluminum electrolytic capacitor, preferably, the conductive high molecular polymer includes PEDOT: PSS and PEDOT, which: the PSS is internally mixed with flexible conductive carbon cloth powder; the core package is impregnated with PEDOT: the mixed dispersion of PSS and flexible conductive carbon cloth powder forms PEDOT: the PSS film is then impregnated with EDOT monomer and oxidant to form a PEDOT film.
The method for manufacturing the solid aluminum electrolytic capacitor preferably comprises the following steps of;
1) Winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) PEDOT: PSS is dispersed in dispersion, PEDOT: the concentration of PSS in the dispersion was 5% or less, at PEDOT: adding flexible conductive carbon cloth powder into the PSS dispersion liquid, and uniformly dispersing, wherein the weight of the flexible conductive carbon cloth powder is 5-15% of the weight of the conductive high polymer;
3) Impregnating the dispersion in step 2), drying to form PEDOT between the core-coated anode foil and cathode foil: a PSS film;
4) And 3) sealing the core pack finished in the step 3) in the shell through a rubber plug.
In the above method for producing a solid aluminum electrolytic capacitor, the impregnation preferably includes one of vacuum impregnation, pressure impregnation and heating impregnation.
In the above method for manufacturing a solid aluminum electrolytic capacitor, preferably, the solvent of the dispersion liquid in the step 2) includes one or more of anhydrous methanol, anhydrous ethanol, anhydrous propanol, DMF or acetone.
In the above method for manufacturing a solid aluminum electrolytic capacitor, preferably, the flexible conductive carbon cloth powder in the step 2) is firstly cleaned in deionized water, then is ultrasonically dispersed in an organic solvent for more than 2 hours, and is taken out for air drying; the organic solvent is the same as the solvent of the dispersion in step 2).
In the above method for manufacturing a solid aluminum electrolytic capacitor, preferably, the step 3) is followed by steps 3.1) to 3.4) 1 to 3 times;
3.1 A) drying the dispersion of the core comprising the impregnated EDOT monomer;
3.2 Impregnating the oxidant solution; the oxidant is one or more of iron p-toluenesulfonate, ammonium persulfate and sodium persulfate;
3.3 Polymerization to form conductive polymer between anode foil and cathode foil, wherein the polymerization process comprises three stages, the first stage temperature is 50-65deg.C, and the time is 15-20min; the temperature of the second stage is 80-100deg.C, and the time is 20-25min; the temperature of the third stage is 140-155 ℃ and the time is 15-20min;
3.4 Cleaning and drying the core bag after polymerization.
Compared with the prior art, the invention has the advantages that: in the invention, the solid electrolyte PEDOT: the PSS is mixed with a flexible conductive carbon cloth powder such that in PEDOT: the PSS dispersion liquid starts to form a conductive polymer film around the flexible conductive carbon cloth powder when being dried to form a film, and under the action of the flexible conductive carbon cloth powder, PEDOT: the stability of the PSS film can be increased, and the PEDOT can be reduced by the flexible conductive carbon cloth powder: the resistance of the PSS film thereby reduces the internal resistance of the solid aluminum electrolytic capacitor.
Detailed Description
The present invention will be described more fully hereinafter with reference to the preferred embodiments for the purpose of facilitating understanding of the present invention, but the scope of protection of the present invention is not limited to the specific embodiments described below.
It will be understood that when an element is referred to as being "fixed, affixed, connected, or in communication with" another element, it can be directly fixed, affixed, connected, or in communication with the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present invention.
Example 1
The solid aluminum electrolytic capacitor comprises a core package and a shell, wherein the core package is arranged in the shell in a sealing way through a rubber plug, the core package comprises an anode foil, electrolytic paper and a cathode foil, and a conductive high polymer PEDOT is formed between the anode foil and the cathode foil: PSS, conductive high molecular polymer is mixed with flexible conductive carbon cloth powder, the weight of the flexible conductive carbon cloth powder is 5% of that of the conductive high molecular polymer, and the particle size of the flexible conductive carbon cloth powder is 1 μm-100 μm, preferably 30 μm-50 μm. In the embodiment, the flexible conductive carbon cloth powder basically has no obvious tip, so that the flexible conductive carbon cloth powder has good flexibility; it was added to PEDOT: the PSS film can be used for providing PEDOT: the contraction and expansion of PSS serves as a support. The excellent conductivity of the flexible conductive carbon cloth allows its powder to be added to PEDOT: the PSS film can improve PEDOT: conductivity of the PSS film. The conductivity of PEDOT is itself very high, but the doping of PSS in the PEDOT film forms PEDOT: the conductivity of the PSS film is lowered, which has a certain effect on the internal resistance of the solid-state aluminum electrolytic capacitor, and the PEDOT is subjected to the following steps: the improvement of the conductivity of the PSS film can reduce this effect.
In this embodiment, PEDOT: the molar ratio of PEDOT to PSS in the PSS film is 4:1, since too much PSS affects PEDOT: conductivity of the PSS film.
The embodiment provides a manufacturing method of a solid aluminum electrolytic capacitor, which comprises the following steps of;
1) Winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) PEDOT: PSS is dispersed in dispersion, PEDOT: the concentration of PSS in the dispersion was 4%, at PEDOT: adding flexible conductive carbon cloth powder into the PSS dispersion liquid, and uniformly dispersing, wherein the weight of the flexible conductive carbon cloth powder is 5% of the weight of the conductive high polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is firstly cleaned in deionized water, then is ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours, and is taken out for air drying.
3) Impregnating the dispersion in step 2), drying to form PEDOT between the core-coated anode foil and cathode foil: a PSS film; vacuum impregnation is adopted during impregnation.
4) And 3) sealing the core pack finished in the step 3) in the shell through a rubber plug.
In the present embodiment, the solid electrolyte PEDOT: the PSS is mixed with a flexible conductive carbon cloth powder such that in PEDOT: the PSS dispersion liquid starts to form a conductive polymer film around the flexible conductive carbon cloth powder when being dried to form a film, and under the action of the flexible conductive carbon cloth powder, PEDOT: the stability of the PSS film can be increased, and the PEDOT can be reduced by the flexible conductive carbon cloth powder: the resistance of the PSS film thereby reduces the internal resistance of the solid aluminum electrolytic capacitor.
Example 2
The solid aluminum electrolytic capacitor comprises a core package and a shell, wherein the core package is arranged in the shell in a sealing way through a rubber plug, the core package comprises an anode foil, electrolytic paper and a cathode foil, and a conductive high polymer PEDOT is formed between the anode foil and the cathode foil: PSS, conductive high molecular polymer and flexible conductive carbon cloth powder are mixed, the weight of the flexible conductive carbon cloth powder is 15% of that of the conductive high molecular polymer, and the particle size of the flexible conductive carbon cloth powder is 1 mu m-100 mu m.
In this embodiment, PEDOT: the molar ratio of PEDOT to PSS in the PSS film is 4:1, since too much PSS affects PEDOT: conductivity of the PSS film.
In this embodiment, the conductive high molecular polymer includes PEDOT: PSS and PEDOT, PEDOT: the PSS is internally mixed with flexible conductive carbon cloth powder; the core package is impregnated with PEDOT: the mixed dispersion of PSS and flexible conductive carbon cloth powder forms PEDOT: the PSS film is then impregnated with EDOT monomer and oxidant to form a PEDOT film.
The embodiment provides a manufacturing method of a solid aluminum electrolytic capacitor, which comprises the following steps of;
1) Winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) PEDOT: PSS is dispersed in dispersion, PEDOT: the concentration of PSS in the dispersion was 1%, at PEDOT: adding flexible conductive carbon cloth powder into the PSS dispersion liquid, and uniformly dispersing, wherein the weight of the flexible conductive carbon cloth powder is 15% of the weight of the conductive high polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is firstly cleaned in deionized water, then is ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours, and is taken out for air drying.
3) Impregnating the dispersion in step 2), drying to form PEDOT between the core-coated anode foil and cathode foil: a PSS film; vacuum impregnation is adopted during impregnation.
4) And 3) sealing the core pack finished in the step 3) in the shell through a rubber plug.
Example 3
The solid aluminum electrolytic capacitor comprises a core package and a shell, wherein the core package is arranged in the shell in a sealing way through a rubber plug, the core package comprises an anode foil, electrolytic paper and a cathode foil, and a conductive high polymer PEDOT is formed between the anode foil and the cathode foil: PSS, conductive high molecular polymer and flexible conductive carbon cloth powder are mixed, the weight of the flexible conductive carbon cloth powder is 8% of that of the conductive high molecular polymer, and the particle size of the flexible conductive carbon cloth powder is 1 mu m-100 mu m.
In this embodiment, PEDOT: the molar ratio of PEDOT to PSS in the PSS film is 4:1, since too much PSS affects PEDOT: conductivity of the PSS film.
The embodiment provides a manufacturing method of a solid aluminum electrolytic capacitor, which comprises the following steps of;
1) Winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) PEDOT: PSS is dispersed in dispersion, PEDOT: the concentration of PSS in the dispersion was 2%, at PEDOT: adding flexible conductive carbon cloth powder into the PSS dispersion liquid, and uniformly dispersing, wherein the weight of the flexible conductive carbon cloth powder is 8% of the weight of the conductive high polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is firstly cleaned in deionized water, then is ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours, and is taken out for air drying.
3) Impregnating the dispersion in step 2), drying to form PEDOT between the core-coated anode foil and cathode foil: a PSS film; vacuum impregnation is adopted during impregnation.
Step 3) is followed by steps 3.1) -3.4) 1-3 times;
3.1 A) drying the dispersion of the core comprising the impregnated EDOT monomer;
3.2 Impregnating the oxidant solution; the oxidant is iron p-toluenesulfonate;
3.3 Polymerization to form conductive polymer between anode foil and cathode foil, wherein the polymerization process comprises three stages, the first stage temperature is 50-65deg.C, and the time is 15-20min; the temperature of the second stage is 80-100deg.C, and the time is 20-25min; the temperature of the third stage is 140-155 ℃ and the time is 15-20min;
3.4 Cleaning and drying the core bag after polymerization.
Comparative example 1
Comparative example 1 in contrast to example 1, no flexible conductive carbon cloth powder was added to the dispersion of PEDOT: PSS, that is, no flexible conductive carbon cloth powder was added to the PEDOT: PSS film. Otherwise, the same as in example 1 was used.
Comparative example 2
Comparative example 2 also does not incorporate flexible conductive carbon cloth powder in the dispersion of PEDOT: PSS, that is, does not incorporate flexible conductive carbon cloth powder in the PEDOT: PSS film, as compared with example 3. Otherwise, the same as in example 3 was used.
Table one is the initial capacitance, internal resistance, and capacitance and capacity retention after 2000 charge and discharge cycles at rated voltage of 10 products each of example 1, example 2, example 3, comparative example 1 and comparative example 2.
| Sequence number | Initial capacitance (mu F) | Internal resistance (mΩ) | Capacitance after 2000 charge and discharge cycles (μF) | Capacitance retention rate |
| Example 1 | 22.8 | 55.3 | 22.2 | 97.4% |
| Example 2 | 23.4 | 50.2 | 23.1 | 98.7% |
| Example 3 | 25.1 | 328 | 23.5 | 93.8% |
| Comparative example 1 | 22.6 | 58.1 | 20.8 | 92.0% |
| Comparative example 2 | 23.3 | 40.1 | 20.3 | 87.1% |
From the above table, the cyclic stability of example 1, example 2 and example 3 is better than that of comparative example 1 and comparative example 2, and example 2 is better than example 1 because the conductive high molecular polymer of example 2 has more flexible conductive carbon cloth powder than that of example 1. The highest capacitance in example 3 is because example 3 is also impregnated with EDOT and polymerized to form PEDOT after impregnation with the dispersion of PEDOT: PSS and flexible conductive carbon cloth powder, but the cyclic stability of such a multilayer structure is deteriorated.
Claims (6)
1. The utility model provides a solid-state aluminium electrolytic capacitor, includes core package and shell, the core package passes through rubber buffer seal setting in the shell, its characterized in that: the core package comprises an anode foil, electrolytic paper and a cathode foil, wherein a conductive high polymer is formed between the anode foil and the cathode foil, the conductive high polymer is mixed with flexible conductive carbon cloth powder, and the weight of the flexible conductive carbon cloth powder is 5-15% of that of the conductive high polymer; the particle size of the flexible conductive carbon cloth powder is 1 mu m-100 mu m.
2. The solid aluminum electrolytic capacitor according to claim 1, wherein: the conductive high molecular polymer comprises PEDOT: and the molecular weight of the PEDOT is larger than that of the PSS.
3. A manufacturing method of a solid aluminum electrolytic capacitor is characterized in that: comprises the following steps of;
1) Winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) PEDOT: PSS is dispersed in the dispersion, PEDOT: the concentration of PSS in the dispersion was 5% or less, at PEDOT: adding flexible conductive carbon cloth powder into the PSS dispersion liquid, and uniformly dispersing, wherein the weight of the flexible conductive carbon cloth powder is 5-15% of the weight of the conductive high polymer;
3) Impregnating the dispersion in step 2), drying to form PEDOT between the core-coated anode foil and cathode foil: a PSS film;
4) And 3) sealing the core pack finished in the step 3) in the shell through a rubber plug.
4. The method for manufacturing a solid aluminum electrolytic capacitor according to claim 3, wherein: the impregnation includes one of vacuum impregnation, pressure impregnation or heating impregnation.
5. The method for manufacturing a solid aluminum electrolytic capacitor according to claim 3, wherein: the solvent of the dispersion liquid in the step 2) comprises one or more of absolute methanol, absolute ethanol, absolute propanol, DMF or acetone.
6. The method for manufacturing a solid aluminum electrolytic capacitor according to claim 3, wherein: the flexible conductive carbon cloth powder in the step 2) is firstly cleaned in deionized water, then is ultrasonically dispersed in an organic solvent for more than 2 hours, and is taken out for air drying; the organic solvent is the same as the solvent of the dispersion in step 2).
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856077A (en) * | 2012-09-21 | 2013-01-02 | 深圳市柏瑞凯电子科技有限公司 | Manufacture method of solid electrolytic capacitor |
| CN106206028A (en) * | 2016-07-20 | 2016-12-07 | 益阳艾华富贤电子有限公司 | The doping conducting polymer of carbon, production method and the forming method wrapped at core |
| CN111524711A (en) * | 2013-12-17 | 2020-08-11 | Avx公司 | Stable solid electrolytic capacitor containing nanocomposite |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856077A (en) * | 2012-09-21 | 2013-01-02 | 深圳市柏瑞凯电子科技有限公司 | Manufacture method of solid electrolytic capacitor |
| CN111524711A (en) * | 2013-12-17 | 2020-08-11 | Avx公司 | Stable solid electrolytic capacitor containing nanocomposite |
| CN106206028A (en) * | 2016-07-20 | 2016-12-07 | 益阳艾华富贤电子有限公司 | The doping conducting polymer of carbon, production method and the forming method wrapped at core |
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