CN114783776A - Solid-state aluminum electrolytic capacitor and preparation method thereof - Google Patents
Solid-state aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN114783776A CN114783776A CN202210371267.6A CN202210371267A CN114783776A CN 114783776 A CN114783776 A CN 114783776A CN 202210371267 A CN202210371267 A CN 202210371267A CN 114783776 A CN114783776 A CN 114783776A
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- pedot
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- 239000003990 capacitor Substances 0.000 title claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title description 4
- 239000000843 powder Substances 0.000 claims abstract description 60
- 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
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims abstract description 54
- 239000006185 dispersion Substances 0.000 claims abstract description 39
- 229920000144 PEDOT:PSS Polymers 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000011888 foil Substances 0.000 claims description 37
- 229920000642 polymer Polymers 0.000 claims description 26
- 238000005470 impregnation Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000005253 cladding 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
- 238000002156 mixing Methods 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
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 230000000379 polymerizing effect Effects 0.000 claims description 4
- FYMCOOOLDFPFPN-UHFFFAOYSA-K iron(3+);4-methylbenzenesulfonate Chemical compound [Fe+3].CC1=CC=C(S([O-])(=O)=O)C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 FYMCOOOLDFPFPN-UHFFFAOYSA-K 0.000 claims description 3
- 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 claims description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 2
- 238000007605 air drying Methods 0.000 claims 1
- 229920001940 conductive polymer Polymers 0.000 abstract description 9
- 239000007784 solid electrolyte Substances 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011244 liquid electrolyte Substances 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 utility model provides a solid-state aluminum electrolytic capacitor, includes core package and shell, and the core package passes through the rubber buffer and seals the setting in the shell, and the core package includes positive pole paper tinsel, electrolytic paper and negative pole paper tinsel, is formed with conductive polymer between positive pole paper tinsel and the negative pole paper tinsel, and conductive polymer mixes there is flexible conductive carbon cloth powder, and the weight of flexible conductive carbon cloth powder is conductive polymer weight 5-15%. In the invention, the solid electrolyte PEDOT: PSS is mixed with a flexible conductive carbon cloth powder, so that when PEDOT: when the PSS dispersion liquid is dried to form a film, a conductive polymer film is formed around the flexible conductive carbon cloth powder, and the content of PEDOT: the stability of the PSS film can be increased, and the flexible conductive carbon cloth powder can also reduce the PEDOT: the resistance of the PSS film thus 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, and the liquid aluminum electrolytic capacitor is easy to generate the phenomenon of liquid leakage caused by the opening of an explosion-proof valve due to the liquid electrolyte, and can generate explosion seriously to damage a circuit board. The poor mechanical properties of the solid aluminum electrolytic capacitor show poor cycle stability due to the fact that the electrolyte is solid, electrons move on the solid electrolyte during charge and discharge cycles of the capacitor, so that the solid electrolyte expands and contracts, the poor mechanical properties of the solid electrolyte can cause the solid electrolyte to be separated from the anode foil during hundreds of thousands of cycles, and the extraction rate of the capacitor is reduced, so that the capacitor fails.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a solid aluminum electrolytic capacitor with good cycle 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 aluminum electrolytic capacitor, includes core package and shell, the core package passes through the sealed setting of rubber buffer in the shell, its characterized in that: the core package comprises an anode foil, electrolytic paper and a cathode foil, wherein a conductive high molecular polymer is formed between the anode foil and the cathode foil, the conductive high molecular 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 molecular polymer.
In the above solid aluminum electrolytic capacitor, preferably, the flexible conductive carbon cloth powder has a particle size of 1 μm to 100 μm.
In the above solid aluminum electrolytic capacitor, preferably, the conductive high molecular polymer includes PEDOT: PSS, said PEDOT having a molecular weight greater than that of PSS.
In the above solid aluminum electrolytic capacitor, preferably, the conductive high molecular polymer includes PEDOT: PSS and PEDOT, said PEDOT: PSS is internally mixed with flexible conductive carbon cloth powder; firstly, the core bag is impregnated with PEDOT: the mixed dispersion of PSS and flexible conductive carbon cloth powder formed PEDOT: PSS film, then soaking EDOT monomer and oxidant to form PEDOT film.
A method for manufacturing a solid-state aluminum electrolytic capacitor preferably comprises the following steps;
1) winding the anode foil, the electrolytic paper and the cathode foil into a core cladding;
2) and (3) mixing PEDOT: PSS in dispersion, PEDOT: PSS concentration in dispersion was below 5%, in 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 that of the conductive high molecular polymer;
3) impregnating the dispersion in step 2), drying to form PEDOT: a PSS film;
4) the core bag which completes the step 3) is arranged in the shell in a sealing way through the rubber plug.
In the method for manufacturing a solid aluminum electrolytic capacitor, the impregnation preferably includes one of vacuum impregnation, pressure impregnation, and heat impregnation.
In the method for manufacturing the solid aluminum electrolytic capacitor, preferably, the solvent of the dispersion in step 2) includes one or more of anhydrous methanol, anhydrous ethanol, anhydrous propanol, DMF, and acetone.
In the above method for manufacturing a solid aluminum electrolytic capacitor, preferably, the flexible conductive carbon cloth powder in step 2) is cleaned in deionized water, and then ultrasonically dispersed in an organic solvent for more than 2 hours, and then taken out and air-dried; 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, step 3) is followed by steps 3.1) to 3.4) 1 to 3 times;
3.1) impregnating the core cladding into the EDOT monomer dispersion liquid and drying;
3.2) impregnating with an oxidant solution; the oxidant is one or more of ferric p-toluenesulfonate, ammonium persulfate and sodium persulfate;
3.3) polymerizing to form a conductive high molecular polymer between the anode foil and the cathode foil, wherein the polymerization process is divided into three stages, namely a first stage at the temperature of 50-65 ℃ for 15-20 min; the second stage temperature is 80-100 deg.C, and time is 20-25 min; the temperature of the third stage is 140 ℃ and 155 ℃, and the time is 15-20 min;
and 3.4) cleaning and drying the core bag after the polymerization is finished.
Compared with the prior art, the invention has the advantages that: in the invention, the solid electrolyte PEDOT: PSS is mixed with a flexible conductive carbon cloth powder, so that when PEDOT: when the PSS dispersion liquid is dried to form a film, a conductive polymer film is formed around the flexible conductive carbon cloth powder, and the content of PEDOT: the stability of the PSS film can be increased, and the flexible conductive carbon cloth powder can also reduce the content of PEDOT: the resistance of the PSS film thus reduces the internal resistance of the solid-state aluminum electrolytic capacitor.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to," secured to, "connected to or communicated with" another element, it can be directly fixed to, secured to, connected to or communicated with the other element or indirectly fixed to, secured to, connected to or communicated with the other element through other intermediate connecting members.
Unless otherwise defined, all terms of art 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 limit the scope of the present invention.
Example 1
The utility model provides a solid-state aluminum electrolytic capacitor, includes core package and shell, and the core package passes through the sealed setting of rubber buffer in the shell, and the core package includes anode foil, electrolytic paper and cathode foil, is formed with conductive polymer PEDOT between anode foil and the cathode foil: PSS, conductive high molecular polymer mixed with flexible conductive carbon cloth powder, wherein 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 1-100 μm, preferably 30-50 μm. In the embodiment, the flexible conductive carbon cloth powder has good flexibility because the flexible conductive carbon cloth powder basically has no obvious tip; it was added to PEDOT: the post-treatment in PSS films can give PEDOT: the contraction and expansion of the PSS serves as a support. The excellent conductivity of the flexible conductive carbon cloth enables the powder to be added into PEDOT: the content of PEDOT in the PSS film can be improved: conductivity of PSS film. The conductivity of PEDOT is high, but doping PSS in a PEDOT film forms PEDOT: the electrical conductivity of the PSS film can be reduced, which has certain influence on the internal resistance of the solid aluminum electrolytic capacitor, and the electrical conductivity of the PSS film is increased by the flexible conductive carbon cloth powder to the ratio of PEDOT: the improvement of the electrical conductivity of the PSS film can reduce this effect.
In this example, PEDOT: the molar ratio of PEDOT to PSS in PSS films was 4:1, since too much PSS would affect PEDOT: electrical conductivity of the PSS film.
The embodiment provides a manufacturing method of a solid-state aluminum electrolytic capacitor, which comprises the following steps;
1) winding the anode foil, the electrolytic paper and the cathode foil into a core cladding;
2) and (3) mixing PEDOT: PSS in dispersion, PEDOT: PSS concentration in dispersion was 4%, when 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 that of the conductive high molecular polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is cleaned in deionized water, and then is taken out and dried after being ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours.
3) Impregnating the dispersion in step 2), drying to form PEDOT: a PSS film; and vacuum impregnation is adopted during impregnation.
4) The core bag which completes the step 3) is arranged in the shell in a sealing way through the rubber plug.
In this example, the solid electrolyte PEDOT: PSS is mixed with a flexible conductive carbon cloth powder, so that when PEDOT: when the PSS dispersion liquid is dried to form a film, a conductive polymer film is formed around the flexible conductive carbon cloth powder, and the ratio of PEDOT: the stability of the PSS film can be increased, and the flexible conductive carbon cloth powder can also reduce the PEDOT: the resistance of the PSS film thus reduces the internal resistance of the solid aluminum electrolytic capacitor.
Example 2
The utility model provides a solid-state aluminum electrolytic capacitor, includes core package and shell, and the core package passes through the sealed setting of rubber buffer in the shell, and the core package includes anode foil, electrolytic paper and cathode foil, is formed with conductive polymer PEDOT between anode foil and the cathode foil: PSS, wherein the conductive high molecular polymer is mixed with flexible conductive carbon cloth powder, the weight of the flexible conductive carbon cloth powder is 15% of the weight of the conductive high molecular polymer, and the particle size of the flexible conductive carbon cloth powder is 1-100 micrometers.
In this example, PEDOT: the molar ratio of PEDOT to PSS in PSS films was 4:1, since too much PSS would affect PEDOT: electrical conductivity of the PSS film.
In this embodiment, the conductive high molecular polymer includes PEDOT: PSS and PEDOT, PEDOT: PSS is internally mixed with flexible conductive carbon cloth powder; firstly, the core bag is impregnated with PEDOT: the mixed dispersion of PSS and flexible conductive carbon cloth powder formed PEDOT: PSS film, then impregnating EDOT monomer and oxidant to form PEDOT film.
The embodiment provides a manufacturing method of a solid-state aluminum electrolytic capacitor, which comprises the following steps;
1) winding the anode foil, the electrolytic paper and the cathode foil into a core cladding;
2) and (3) mixing PEDOT: PSS in dispersion, PEDOT: the concentration of PSS in the dispersion was 1%, as measured in 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 that of the conductive high molecular polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is cleaned in deionized water, and then is ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours, and then is taken out and air-dried.
3) Impregnating the dispersion in step 2), drying to form PEDOT: a PSS film; and vacuum impregnation is adopted during impregnation.
4) The core bag which completes the step 3) is arranged in the shell in a sealing way through the rubber plug.
Example 3
The utility model provides a solid-state aluminum electrolytic capacitor, includes core package and shell, and the core package passes through the sealed setting of rubber buffer in the shell, and the core package includes anode foil, electrolytic paper and cathode foil, is formed with conductive polymer PEDOT between anode foil and the cathode foil: PSS, wherein the conductive high molecular polymer is mixed with flexible conductive carbon cloth powder, 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 1-100 micrometers.
In this example, PEDOT: the molar ratio of PEDOT to PSS in PSS films was 4:1, since too much PSS would affect PEDOT: electrical conductivity of the PSS film.
The embodiment provides a manufacturing method of a solid-state aluminum electrolytic capacitor, which comprises the following steps;
1) winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) and (3) mixing PEDOT: PSS in dispersion, PEDOT: PSS concentration in dispersion was 2%, when 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 that of the conductive high molecular polymer; the solvent of the dispersion is absolute ethyl alcohol. The flexible conductive carbon cloth powder is cleaned in deionized water, and then is taken out and dried after being ultrasonically dispersed in absolute ethyl alcohol for more than 2 hours.
3) Impregnating the dispersion in step 2), drying to form PEDOT: a PSS film; and vacuum impregnation is adopted during impregnation.
Step 3) is followed by step 3.1) -step 3.4) 1-3 times;
3.1) impregnating the core bag into EDOT monomer dispersion liquid and drying;
3.2) impregnating with an oxidant solution; the oxidant is ferric p-toluenesulfonate;
3.3) polymerizing to form a conductive high molecular polymer between the anode foil and the cathode foil, wherein the polymerization process is divided into three stages, namely a first stage at the temperature of 50-65 ℃ for 15-20 min; the temperature of the second stage is 80-100 ℃, and the time is 20-25 min; the temperature of the third stage is 140-;
and 3.4) cleaning and drying the core bag after the polymerization is finished.
Comparative example 1
Comparative example 1 in comparison with 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. The rest is the same as in example 1.
Comparative example 2
Comparative example 2 also compares to example 3 no flexible conductive carbon cloth powder was added to the PEDOT: PSS dispersion, i.e. no flexible conductive carbon cloth powder was added to the PEDOT: PSS film. The rest is the same as in example 3.
The initial capacitance, internal resistance, and capacitance and capacity retention after 2000 cycles of charge and discharge at rated voltage were measured for 10 products each of examples 1, 2, 3, 1 and 2.
| Serial number | Initial capacitance (. mu.F) | Internal resistance (m omega) | Capacitance (μ F) after 2000 cycles of charging and discharging | Capacity retention ratio |
| 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% |
As can be seen from the above table, the cycle stability of examples 1, 2 and 3 is better than that of comparative examples 1 and 2, and example 2 is better than example 1 because the flexible conductive carbon cloth powder is more contained in the conductive high molecular polymer of example 2 than in example 1. The highest capacitance was obtained in example 3, which was obtained by impregnating the dispersion of the flexible conductive carbon cloth powder with PEDOT, PSS, and EDOT, and polymerizing the same to form PEDOT, but the cyclic stability of the multilayer structure was deteriorated.
Claims (9)
1. The utility model provides a solid-state aluminum electrolytic capacitor, includes core package and shell, the core package passes through the sealed setting of rubber buffer in the shell, its characterized in that: the core package comprises an anode foil, electrolytic paper and a cathode foil, wherein a conductive high molecular polymer is formed between the anode foil and the cathode foil, the conductive high molecular 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 molecular polymer.
2. The solid state aluminum electrolytic capacitor of claim 1, wherein: the particle size of the flexible conductive carbon cloth powder is 1-100 micrometers.
3. The solid-state aluminum electrolytic capacitor of claim 1, wherein: the conductive high molecular polymer comprises PEDOT: PSS, said PEDOT having a molecular weight greater than that of PSS.
4. The solid state aluminum electrolytic capacitor of claim 3, wherein: the conductive high molecular polymer comprises PEDOT: PSS and PEDOT, said PEDOT: the PSS is internally mixed with flexible conductive carbon cloth powder; firstly, the core bag is impregnated with PEDOT: the mixed dispersion of PSS and flexible conductive carbon cloth powder formed PEDOT: PSS film, then soaking EDOT monomer and oxidant to form PEDOT film.
5. A manufacturing method of a solid-state aluminum electrolytic capacitor is characterized by comprising the following steps: comprises the following steps;
1) winding the anode foil, the electrolytic paper and the cathode foil into a core package;
2) and (3) mixing PEDOT: PSS in dispersion, PEDOT: PSS at concentrations below 5% in the dispersion, in 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 that of the conductive high molecular polymer;
3) impregnating the dispersion in step 2), and drying to form PEDOT: a PSS film;
4) the core package which completes the step 3) is hermetically arranged in the shell through the rubber plug.
6. The method for manufacturing a solid-state aluminum electrolytic capacitor according to claim 5, wherein: the impregnation includes one of vacuum impregnation, pressure impregnation, or heat impregnation.
7. The method for manufacturing a solid-state aluminum electrolytic capacitor according to claim 5, 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.
8. The method for manufacturing a solid aluminum electrolytic capacitor according to claim 5, wherein: cleaning the flexible conductive carbon cloth powder in the step 2) in deionized water, then ultrasonically dispersing the powder in an organic solvent for more than 2 hours, taking out the powder and air-drying the powder; the organic solvent is the same as the solvent of the dispersion in step 2).
9. The method for manufacturing a solid-state aluminum electrolytic capacitor according to claim 5, wherein: said step 3) is followed by steps 3.1) -3.4) 1-3 times;
3.1) impregnating the core cladding into the EDOT monomer dispersion liquid and drying;
3.2) impregnating with an oxidant solution; the oxidant is one or more of ferric p-toluenesulfonate, ammonium persulfate and sodium persulfate;
3.3) polymerizing to form a conductive high molecular polymer between the anode foil and the cathode foil, wherein the polymerization process is divided into three stages, namely a first stage at the temperature of 50-65 ℃ for 15-20 min; the temperature of the second stage is 80-100 ℃, and the time is 20-25 min; the temperature of the third stage is 140-;
and 3.4) cleaning and drying the core bag after the polymerization is finished.
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| CN118299185A (en) * | 2024-05-28 | 2024-07-05 | 南京星梵电子科技有限公司 | High-voltage stable solid electrolytic capacitor and preparation method thereof |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118299185A (en) * | 2024-05-28 | 2024-07-05 | 南京星梵电子科技有限公司 | High-voltage stable solid electrolytic capacitor and preparation method thereof |
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| CN114783776B (en) | 2023-12-01 |
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