CN112768250A - Solid-state aluminum electrolytic capacitor based on doped polyaniline and preparation method thereof - Google Patents
Solid-state aluminum electrolytic capacitor based on doped polyaniline and preparation method thereof Download PDFInfo
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- CN112768250A CN112768250A CN202011577151.5A CN202011577151A CN112768250A CN 112768250 A CN112768250 A CN 112768250A CN 202011577151 A CN202011577151 A CN 202011577151A CN 112768250 A CN112768250 A CN 112768250A
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- 229920000767 polyaniline Polymers 0.000 title claims abstract description 46
- 239000003990 capacitor Substances 0.000 title claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims description 15
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000005711 Benzoic acid Substances 0.000 claims abstract description 26
- 235000010233 benzoic acid Nutrition 0.000 claims abstract description 26
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 15
- 238000005470 impregnation Methods 0.000 claims description 47
- 239000000243 solution Substances 0.000 claims description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 15
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000011888 foil Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 229920000223 polyglycerol Polymers 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000003792 electrolyte Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 241000579895 Chlorostilbon Species 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 6
- 229910052876 emerald Inorganic materials 0.000 claims description 6
- 239000010976 emerald Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- BTJIUGUIPKRLHP-UHFFFAOYSA-M 4-nitrophenolate Chemical compound [O-]C1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-M 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 3
- 229930195725 Mannitol Natural products 0.000 claims description 3
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- KLIDOSBTXDALBI-UHFFFAOYSA-N ammonium nonanoate Chemical compound [NH4+].CCCCCCCCC([O-])=O KLIDOSBTXDALBI-UHFFFAOYSA-N 0.000 claims description 3
- 229940067597 azelate Drugs 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 235000010355 mannitol Nutrition 0.000 claims description 3
- 239000000594 mannitol Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 3
- FBUKVWPVBMHYJY-UHFFFAOYSA-M nonanoate Chemical compound CCCCCCCCC([O-])=O FBUKVWPVBMHYJY-UHFFFAOYSA-M 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- -1 carboxylate anions Chemical class 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 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
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
-
- 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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
A solid-state aluminum electrolytic capacitor based on doped polyaniline comprises a shell, a core package and a rubber plug, wherein the core package is hermetically arranged in the shell through the rubber plug; the core package is impregnated with a high molecular conductive polymer, the high molecular conductive polymer is benzoic acid doped polyaniline, and the weight of the benzoic acid is 10% -25% of the total weight of the high molecular conductive polymer. In the invention, the conductivity of the polyaniline can be improved by doping the polyaniline with benzoic acid, so that the conductivity of the polyaniline can be improved.
Description
Technical Field
The invention relates to a solid aluminum electrolytic capacitor, in particular to a solid aluminum electrolytic capacitor based on doped polyaniline and a preparation method thereof.
Background
The capacitor is one of three basic components in the electronic industry and is widely applied to various electronic products. Liquid electrolytic capacitors are currently predominant in the market, occupying a large share of the capacitor market. However, with the development of electronic science and technology, electronic products are being developed to have higher frequency, smaller size and higher reliability, and the requirements for the performance of capacitors, particularly at high frequency and high and low temperature, are also increasing accordingly.
The solid-state aluminum electrolytic capacitor has the characteristics of no leakage, low internal resistance and strong ripple current resistance, and is widely applied. In the solid aluminum electrolytic capacitor, the polyaniline has a series of advantages of cheap and easily available monomer raw materials, simple and convenient synthesis process, easy control, good stability and the like, so that the polyaniline becomes a very promising solid electrolyte. Although the conductivity of the polyaniline is good, the internal resistance of the point capacitor needs to be reduced as much as possible in the process of producing the aluminum electrolytic capacitor, that is, the conductivity of the polyaniline needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a solid aluminum electrolytic capacitor based on doped polyaniline and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a solid-state aluminum electrolytic capacitor based on doped polyaniline comprises a shell, a core package and a rubber plug, wherein the core package is hermetically arranged in the shell through the rubber plug; the core package is impregnated with a high molecular conductive polymer, the high molecular conductive polymer is benzoic acid doped polyaniline, and the weight of the benzoic acid is 10% -25% of the total weight of the high molecular conductive polymer.
In the solid aluminum electrolytic capacitor based on doped polyaniline, the weight of the benzoic acid is preferably 15% of the total weight of the high molecular conductive polymer.
In the solid aluminum electrolytic capacitor based on doped polyaniline, preferably, the outer layer of the core package is provided with polyglycerol.
A solid-state aluminum electrolytic capacitor based on doped polyaniline and a preparation method thereof comprise the following steps:
1) riveting the cut anode foil and cathode foil with an anode guide pin and a cathode guide pin respectively and then winding the anode foil and the cathode foil into a core package;
2) impregnating the core bag with a pretreatment agent, and drying; the pretreatment agent is a silane coupling agent;
3) impregnation;
preparing an immersion liquid, dissolving benzoic acid in an N-methyl-2-pyrrolidone solution, and then dispersing polyphenyl ammonium powder in the solution to obtain the immersion liquid, wherein the weight of the benzoic acid accounts for 5% -25% of the total weight of the benzoic acid and the polyphenyl ammonium; the amount of the dispersed N-methyl-2-pyrrolidone solution per gram of the polyanilinium powder is at least 3 mL;
soaking the core processed in the step 2) into the impregnation solution;
4) after drying, the core bag is impregnated with polyglycerol;
6) assembling, cleaning and aging.
In the solid aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof, preferably, multiple impregnation is adopted during impregnation of the impregnation solution, and the multiple impregnation comprises first impregnation and second impregnation; the first impregnation time is 2 minutes, and the temperature is normal temperature; directly drying at the temperature of 120-180 ℃ for 20-40 minutes after the first impregnation is finished; the second impregnation is performed in the same way as the first impregnation.
Preferably, after the first impregnation and the second impregnation are finished, the solid aluminum electrolytic capacitor is placed at normal temperature for 30-120 minutes to enable the core package to naturally absorb the impregnation liquid; then drying is carried out;
preferably, the pretreatment agent in the step 2 is a silane coupling agent, and the impregnation in the step 2 is performed for 1-5 minutes at 45-200 ℃ for 1-3 hours.
Preferably, an electrolyte is further impregnated between the step 3) and the step 4); the electrolyte comprises a solvent and a solute, and the solvent comprises ethylene glycol; the solute comprises one or more of ammonium pelargonate, boric acid, ammonium azelate, ammonium pentaborate, mannitol and ammonium alkyl pelargonate; the additive comprises one or more of ammonium p-nitrophenylate, ammonium hypophosphite and graphite.
Preferably, the preparation method of the polyaniline-doped solid aluminum electrolytic capacitor comprises the following steps:
i, adding sulfuric acid into an ethanol solution, wherein the concentration of the sulfuric acid is 0.5mol/L, and then adding aniline to form a mixed solution; the volume ratio of the aniline to the ethanol is 1: 25;
II, mechanically stirring the mixed solution uniformly at the temperature of 5-15 ℃;
III, slowly adding an oxidant into the mixed solution in the step 2), and stirring for more than 4 hours; the oxidant is ammonium persulfate solution, and the concentration of the ammonium persulfate solution is 1-4mol/mL to obtain the polyaniline in emerald salt oxidation state;
IV, filtering the polyaniline obtained in the step 3), and washing with acetone; then stirring the mixture in 0.1mol/L ammonia water solution for more than 12 hours to obtain the poly-aniline in the emerald alkali oxidation state;
v the product obtained in step 4) is washed thoroughly with distilled water, filtered and dried in an oven at 50-80 ℃ for more than 24 hours.
Compared with the prior art, the invention has the advantages that: in the invention, the conductivity of the polyaniline can be improved by doping the polyaniline with benzoic acid, so that the conductivity of the polyaniline can be improved.
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, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
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
A solid-state aluminum electrolytic capacitor based on doped polyaniline comprises a shell, a core package and a rubber plug, wherein the core package is hermetically arranged in the shell through the rubber plug; the core package is impregnated with a high molecular conductive polymer, the high molecular conductive polymer is benzoic acid doped polyaniline, and the weight of the benzoic acid is 20% of the total weight of the high molecular conductive polymer. In this embodiment, the outer layer of the core comprises an impregnation of polyglycerol. In this embodiment, the outermost layer of the core package is impregnated with a layer of polyglycerol, and the macromolecular characteristic of the polyglycerol can prevent a part of heat from entering the core package when the aluminum electrolytic capacitor is welded on the circuit board. The temperature transferred to the aluminum electrolytic capacitor during welding can reach 200 to 300 ℃; the temperature is transferred to the core package, so that a gap is easily generated between the high-molecular conductive polymer and the anode foil, and under the impact of large current, the gap is expanded to reduce the capacity of the capacitor; under the characteristic of the macromolecule of the polyglycerol, when heat generated by welding is transferred to the core package, the temperature is reduced to more than 100 ℃, so that the core package is protected. Meanwhile, the polyglycerol on the outer layer of the core bag can also transfer the heat inside the core bag to the shell, so that the dispersion of the heat above the core bag is accelerated, and the large-current impact resistance of the capacitor is enhanced.
In this example, it is unlikely that the carboxylate anions provided by benzoic acid would all interact with the Polyphenylammonium (PANI) chains when the concentration of benzoic acid doping reaches a certain value. After the concentration of the benzoic acid reaches more than 10%, especially reaches 20%; there will be a significant amount of carboxylate anions free between the Polyphenylammonium (PANI) chains; these free anions increase the resistance to charge transfer between Polyaniline (PANI) chains. In this example, the conductivity of the benzoic acid doped Polyaniline (PANI) film reached 1.08 × 10-4(Ωm)-1。
The embodiment also provides a solid aluminum electrolytic capacitor based on doped polyaniline and a preparation method thereof, and the method comprises the following steps:
1) riveting the cut anode foil and cathode foil with an anode guide pin and a cathode guide pin respectively and then winding the anode foil and the cathode foil into a core package;
2) impregnating the core bag with a pretreatment agent, and drying; the pretreatment agent is a silane coupling agent;
3) impregnation;
preparing an immersion liquid, dissolving benzoic acid in an N-methyl-2-pyrrolidone solution, and then dispersing polyphenyl ammonium powder in the solution to obtain the immersion liquid, wherein the weight of the benzoic acid accounts for 20% of the total weight of the benzoic acid and the polyphenyl ammonium; the amount of the dispersed N-methyl-2-pyrrolidone solution per gram of the polyanilinium powder is at least 3 mL;
soaking the core processed in the step 2) into the impregnation solution;
4) after drying, the core bag is impregnated with polyglycerol;
6) assembling, cleaning and aging.
In this embodiment, multiple impregnation is adopted when impregnating the impregnation liquid, and the multiple impregnation includes first impregnation and second impregnation; the first impregnation time is 2 minutes, and the temperature is normal temperature; directly drying at the temperature of 120-180 ℃ for 20-40 minutes after the first impregnation is finished; the second impregnation is performed in the same way as the first impregnation. After the first impregnation and the second impregnation are finished, standing for 30-120 minutes at normal temperature to enable the core bag to naturally absorb the impregnation liquid; then drying is carried out;
in this embodiment, the pretreatment agent in step 2 is a silane coupling agent, and the impregnation time in step 2 is 1 to 5 minutes, the temperature is 45 to 200 ℃, and the time is 1 to 3 hours.
In this embodiment, an electrolyte is further impregnated between the step 3) and the step 4); the electrolyte comprises a solvent and a solute, wherein the solvent comprises ethylene glycol; the solute comprises one or more of ammonium pelargonate, boric acid, ammonium azelate, ammonium pentaborate, mannitol and ammonium alkyl pelargonate; the additive comprises one or more of ammonium p-nitrophenylate, ammonium hypophosphite and graphite. In this embodiment, the electrolyte can repair the oxide film on the surface of the damaged anode foil, thereby reducing the leakage current of the solid-state aluminum electrolytic capacitor.
In this example, the preparation of polyanilinium comprises the following steps:
1) adding sulfuric acid into an ethanol solution, wherein the concentration of the sulfuric acid is 0.5mol/L, and then adding aniline to form a mixed solution; the volume ratio of the aniline to the ethanol is 1: 25;
2) mechanically stirring the mixed solution at 5-15 deg.C;
3) slowly adding an oxidant into the mixed solution obtained in the step 2), and stirring for more than 4 hours; the oxidant is ammonium persulfate solution, and the concentration of the ammonium persulfate solution is 1-4mol/mL to obtain the polyaniline in emerald salt oxidation state;
4) filtering the polyaniline obtained in the step 3), and washing with acetone; then stirring the mixture in 0.1mol/L ammonia water solution for more than 12 hours to obtain the poly-aniline in the emerald alkali oxidation state;
5) fully washing the product obtained in the step 4) with distilled water, filtering, and drying in an oven at 50-80 ℃ for more than 24 hours.
The internal resistance of the solid-state aluminum electrolytic capacitor manufactured in this example was 31.2m Ω.
In the embodiment, the conductivity of the polyaniline can be improved by doping the polyaniline with benzoic acid, so that the conductivity of the polyaniline can be improved.
Claims (9)
1. A solid-state aluminum electrolytic capacitor based on doped polyaniline is characterized in that: the core bag is hermetically arranged in the shell through the rubber plug; the core package is impregnated with a high molecular conductive polymer, the high molecular conductive polymer is benzoic acid doped polyaniline, and the weight of the benzoic acid is 10% -25% of the total weight of the high molecular conductive polymer.
2. The solid aluminum electrolytic capacitor based on doped polyaniline according to claim 1, wherein: the weight of the benzoic acid is 15% of the total weight of the high molecular conductive polymer.
3. The solid aluminum electrolytic capacitor based on doped polyaniline according to claim 1, wherein: the outer layer of the core bag is provided with polyglycerol.
4. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the manufacturing method thereof according to any one of claims 1 to 3, characterized in that; the method comprises the following steps:
1) riveting the cut anode foil and cathode foil with an anode guide pin and a cathode guide pin respectively and then winding the anode foil and the cathode foil into a core package;
2) impregnating the core bag with a pretreatment agent, and drying; the pretreatment agent is a silane coupling agent;
3) impregnation;
preparing an immersion liquid, dissolving benzoic acid in an N-methyl-2-pyrrolidone solution, and then dispersing polyphenyl ammonium powder in the solution to obtain the immersion liquid, wherein the weight of the benzoic acid accounts for 10% -25% of the total weight of the benzoic acid and the polyphenyl ammonium; the amount of the dispersed N-methyl-2-pyrrolidone solution per gram of the polyanilinium powder is at least 3 mL;
soaking the core processed in the step 2) into the impregnation solution;
4) after drying, the core bag is impregnated with polyglycerol;
6) assembling, cleaning and aging.
5. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof according to claim 4, wherein: multiple impregnation is adopted when the impregnation liquid is impregnated, and the multiple impregnation comprises first impregnation and second impregnation; the first impregnation time is 2 minutes, and the temperature is normal temperature; directly drying at the temperature of 120-180 ℃ for 20-40 minutes after the first impregnation is finished; the second impregnation is performed in the same way as the first impregnation.
6. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof according to claim 5, wherein: after the first impregnation and the second impregnation are finished, standing for 30-120 minutes at normal temperature to enable the core bag to naturally absorb the impregnation liquid; and then dried.
7. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof according to claim 4, wherein: the pretreatment agent in the step 2 is a silane coupling agent, and the impregnation time in the step 2 is 1-5 minutes, the temperature is 45-200 ℃, and the time is 1-3 hours.
8. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof according to claim 4, wherein: electrolyte is also impregnated between the step 3) and the step 4); the electrolyte comprises a solvent and a solute, and the solvent comprises ethylene glycol; the solute comprises one or more of ammonium pelargonate, boric acid, ammonium azelate, ammonium pentaborate, mannitol and ammonium alkyl pelargonate; the additive comprises one or more of ammonium p-nitrophenylate, ammonium hypophosphite and graphite.
9. The solid-state aluminum electrolytic capacitor based on doped polyaniline and the preparation method thereof according to claim 4, wherein: the preparation method of the polyanilinium comprises the following steps:
1) adding sulfuric acid into an ethanol solution, wherein the concentration of the sulfuric acid is 0.5mol/L, and then adding aniline to form a mixed solution; the volume ratio of the aniline to the ethanol is 1: 25;
2) mechanically stirring the mixed solution at 5-15 deg.C;
3) slowly adding an oxidant into the mixed solution obtained in the step 2), and stirring for more than 4 hours; the oxidant is ammonium persulfate solution, and the concentration of the ammonium persulfate solution is 1-4mol/mL to obtain the polyaniline in emerald salt oxidation state;
4) filtering the polyaniline obtained in the step 3), and washing with acetone; then stirring the mixture in 0.1mol/L ammonia water solution for more than 12 hours to obtain the poly-aniline in the emerald alkali oxidation state;
5) fully washing the product obtained in the step 4) with distilled water, filtering, and drying in an oven at 50-80 ℃ for more than 24 hours.
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| CN113436892A (en) * | 2021-06-08 | 2021-09-24 | 湖南艾华集团股份有限公司 | Based on MoS2-PANI solid aluminum electrolytic capacitor and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113436892A (en) * | 2021-06-08 | 2021-09-24 | 湖南艾华集团股份有限公司 | Based on MoS2-PANI solid aluminum electrolytic capacitor and preparation method thereof |
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