CN110706927B - High-reliability solid-state aluminum electrolytic capacitor and preparation method thereof - Google Patents
High-reliability solid-state aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 44
- 239000003990 capacitor Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000011888 foil Substances 0.000 claims abstract description 34
- 239000003792 electrolyte Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 229920001940 conductive polymer Polymers 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 239000000080 wetting agent Substances 0.000 claims description 10
- 230000032683 aging Effects 0.000 claims description 9
- 239000004815 dispersion polymer Substances 0.000 claims description 9
- 229920000767 polyaniline Polymers 0.000 claims description 8
- 229920000128 polypyrrole Polymers 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 claims description 4
- 229940005642 polystyrene sulfonic acid Drugs 0.000 claims description 4
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001741 Ammonium adipate Substances 0.000 claims description 3
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- 235000019293 ammonium adipate Nutrition 0.000 claims description 3
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 3
- 229920005549 butyl rubber Polymers 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 235000011007 phosphoric acid Nutrition 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000005253 cladding Methods 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
- H01G9/008—Terminals
-
- 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
-
- 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
- H01G9/02—Diaphragms; Separators
-
- 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
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a high-reliability solid aluminum electrolytic capacitor and a preparation method thereof, wherein the high-reliability solid aluminum electrolytic capacitor comprises a core bag, an aluminum shell, a lead and a rubber cover, wherein the core bag is arranged in the aluminum shell, the lead is arranged in the rubber cover, and one end of the lead is in conductive connection with the core bag; the core package comprises an anode aluminum foil, electrolyte, electrolytic paper and a cathode carbon foil, wherein the electrolyte is filled in two sides of the electrolytic paper, the anode aluminum foil is wrapped outside one side of the whole core package, and the cathode carbon foil is wrapped outside the other side of the core package. The invention can enable the capacitor to bear high voltage requirements and simultaneously can meet the performance requirements of long-term charge and discharge and the like.
Description
Technical Field
The invention relates to a high-reliability solid aluminum electrolytic capacitor and a preparation method thereof.
Background
With the release of the USB-PD standard and the widespread use of TYPE-C, and the use of more network tools. More and more network power supplies are using higher output power. To meet this requirement, the output of the power supply adopts multi-band voltage output, which generally comprises 5.0V,9.0V,12V and 20V. To meet the electrical performance and life requirements of such power supplies, solid electrolytic capacitors with voltages above 16V are typically used.
However, the solid-state aluminum electrolytic capacitor using the dispersion as the electrolyte can satisfy the requirement of withstand voltage, but cannot withstand the circuit requirements such as repeated charging and discharging.
Disclosure of Invention
The invention aims to solve the technical problem of a high-reliability solid aluminum electrolytic capacitor and a preparation method thereof, which can meet the performance requirements of long-term charge and discharge and the like while enabling the capacitor to bear high voltage requirements, and effectively solve the defects in the prior art.
The invention is realized by the following technical scheme: a high-reliability solid aluminum electrolytic capacitor comprises a core cladding, an aluminum shell, a lead and a rubber cover, wherein the core cladding is arranged in the aluminum shell, the lead is arranged in the rubber cover, and one end of the lead is electrically connected with the core cladding;
the core package comprises an anode aluminum foil, electrolyte, electrolytic paper and a cathode carbon foil, wherein the electrolyte is filled in two sides of the electrolytic paper, the anode aluminum foil is wrapped outside one side of the whole core package, and the cathode carbon foil is wrapped outside the other side of the core package.
Preferably, the electrolytic paper is chemical fiber electrolytic paper.
As a preferable technical scheme, the electrolytic paper is composed of 100% of chemical fibers or 10-20% of hemp pulp and 80-90% of chemical fibers.
A method for manufacturing a high-voltage solid-state aluminum electrolytic capacitor comprises the following specific steps:
step one, core package is obtained
Winding the positive aluminum foil, the carbonization-free electrolytic paper and the lead negative carbon foil to form a core package;
two-step formation repair
Electrifying and repairing the core package in an aluminum foil repairing liquid, wherein the aluminum foil repairing liquid can be composed of one or more of ammonium adipate, ammonium dihydrogen phosphate, phosphoric acid, tartaric acid and the like, and the electrified voltage is not less than the withstand voltage of the anode aluminum foil;
step three impregnation wetting agent
Wetting the formed core package in a prepared wetting agent, wherein the wetting agent can adopt a surfactant with high temperature resistance of not less than 150 ℃, a general fluorocarbon surfactant can be adopted, and the concentration of the surfactant is controlled to be 0.1-1.0%;
drying the core package impregnated with the wetting agent, wherein the drying temperature can be controlled between 105 ℃ and 200 ℃ and is lower than the decomposition temperature of the surfactant;
step four electrolyte formation
Impregnating a conductive polymer dispersion liquid with the particle size of 20-50nm in a vacuum and pressurization alternate circulation environment, wherein the dispersion liquid can be one or more of poly (tri, tetraethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT/PSS), polypyrrole (PPy), polyaniline (PAn) or derivatives thereof, and then drying to form a bottom layer electrolyte;
impregnating a conductive polymer dispersion with a particle size of 50-100nm in a vacuum and pressurized alternating cycle environment, wherein the dispersion can be one or more of poly (tri, tetraethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT/PSS), polypyrrole (PPy), polyaniline (PAn) or derivatives thereof, and then drying to form an upper electrolyte;
the double-layer electrolyte is combined to form a high-molecular conductive electrolyte with both conductivity and current impact resistance;
step five assembled capacitor
Assembling the formed electrolyte core package into an aluminum shell and a rubber cover, wherein the assembly is required to be carried out in a dry and clean environment to avoid mixing of moisture and other impurities, and the rubber cover is made of butyl rubber;
six-step aging capacitor
And (3) carrying out voltage addition aging repair on the capacitor at the temperature of 85-135 ℃, preferably adopting an aging temperature of 105 ℃, wherein the final voltage of aging is not lower than 1.2 times of the rated voltage of the capacitor.
The invention has the beneficial effects that: (1) chemical fiber electrolytic paper is used as the isolation paper, and the electrolytic paper does not need to be carbonized during formation repair. The mechanical strength of the electrolytic paper is ensured, and the risk of short circuit failure of the capacitor can be reduced;
(2) the core cladding is treated by the wetting agent, so that the surface tension of the anode aluminum foil, the cathode carbon foil and the electrolytic paper is reduced, the difficulty of impregnating the capacitor with electrolyte is reduced, the capacity of the capacitor is improved, the ESR (equivalent series impedance) is reduced, and the consistency of the performance of the capacitor in batch manufacturing is improved;
(3) the double-layer conductive polymer dispersion liquid with different particle diameters is adopted, so that the initial electrical property of the capacitor is improved, the capacity is improved, the ESR (equivalent series impedance) is reduced, and the charge and discharge performance of the capacitor is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device 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 "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the aluminum-clad core package comprises a core package 1, an aluminum shell 2, a lead 3 and a rubber cover 4, wherein the core package is installed in the aluminum shell, the lead is arranged in the rubber cover, and one end of the lead is electrically connected with the core package;
as shown in fig. 2, the core package 1 includes a positive aluminum foil 1-1, an electrolyte 1-2, an electrolytic paper 1-3, and a negative carbon foil 1-4, the electrolyte is filled on both sides of the electrolytic paper, the positive aluminum foil is wrapped outside one side of the whole core package, and the negative carbon foil is wrapped outside the other side of the core package.
In the implementation, the electrolytic paper is chemical fiber electrolytic paper, the chemical fiber electrolytic paper can be 100% in composition, and can also be composed of 10-20% of hemp pulp and 80-90% of chemical fiber, the electrolytic paper is adopted to replace the traditional carbonized type electrolytic paper, and the traditional carbonized type electrolytic paper is composed of 100% of plant fiber.
Example 1
(1) Chemical fiber electrolytic paper with a thickness of 40 μm and a density of 0.35g/cm is used3Cutting, nailing and winding the anode aluminum foil, the cathode carbon foil and the lead to form a 25V470 muF core package;
(2) welding the core package, and electrifying to form a repair liquid, wherein the formed repair liquid adopts a mixed liquid of ammonium adipate and ammonium dihydrogen phosphate, and the formed voltage is the rated voltage of the anode aluminum foil;
(3) and drying the repaired core package. Adopting fluorocarbon surfactant to dissolve at 80-90 deg.C, the concentration is 0.5-1.0% by mass ratio. Impregnating the dried core package with a surfactant aqueous solution, and then drying at the temperature of 150-170 ℃;
(4) impregnating conductive polymer dispersion liquid with the particle size of 20-50nm in an environment of alternating vacuum and 2 atmospheric pressure pressurization, wherein the conductive polymer adopts poly tri, tetraethylene dioxythiophene-polyvinyl sulfonic acid (PEDOT/PSS). Drying, impregnating conductive polymer dispersion liquid with the grain diameter of 50-100nm in an environment of alternately pressurizing in vacuum and 2 atmospheric pressures, wherein the conductive polymer adopts poly-tri, tetraethylene dioxythiophene-polyvinyl sulfonic acid (PEDOT/PSS), and then drying to form electrolyte;
(5) sealing and assembling the core bag in a dry and clean environment by adopting a PU coated aluminum shell and a butyl rubber cover;
(6) in an aging machine at 105 ℃, voltage is applied to carry out aging repair treatment on the capacitor.
Comparative example 1
Under the same conditions of other steps and materials as in example 1, a 25V470 μ F capacitor was fabricated, with the following differences:
(1) in the step (1), electrolysis of plant fibers is usedThe thickness of the paper and the electrolytic paper is 40 μm, and the density is 0.4g/cm3。
(2) In the step (2), the anode aluminum foil is repaired and the electrolytic paper is carbonized in a mode of circular operation of electrification formation and high-temperature carbonization. Wherein the carbonization temperature is 200-250 ℃;
(3) the process of step (3) is not carried out;
(4) in the step (4), conducting impregnation by adopting a conductive polymer dispersion liquid with the grain diameter of 50-100nm to form an electrolyte;
(5) and (4) aging and repairing at 125 ℃ in the step (6).
The capacitor manufactured by the method is subjected to a charge-discharge test, wherein the charge-discharge mode adopts a method of national standard GB/T6346.26-2018, and the charge-discharge cycle number is 10000. The results were as follows:
the invention has the beneficial effects that: (1) chemical fiber electrolytic paper is used as the isolation paper, and the electrolytic paper does not need to be carbonized during formation repair. The mechanical strength of the electrolytic paper is ensured, and the risk of short circuit failure of the capacitor can be reduced;
(2) the core cladding is treated by the wetting agent, so that the surface tension of the anode aluminum foil, the cathode carbon foil and the electrolytic paper is reduced, the difficulty of impregnating the capacitor with electrolyte is reduced, the capacity of the capacitor is improved, the ESR (equivalent series impedance) is reduced, and the consistency of the performance of the capacitor in batch manufacturing is improved;
(3) the double-layer conductive polymer dispersion liquid with different particle diameters is adopted, so that the initial electrical property of the capacitor is improved, the capacity is improved, the ESR (equivalent series impedance) is reduced, and the charge and discharge performance of the capacitor is effectively improved.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (3)
1. A high-reliability solid-state aluminum electrolytic capacitor is characterized in that: the core bag is characterized by comprising a core bag (1), an aluminum shell (2), a lead (3) and a rubber cover (4), wherein the core bag (1) is installed in the aluminum shell (2), the lead (3) is arranged in the rubber cover (4), and one end of the lead is in conductive connection with the core bag (1);
the core package (1) comprises a positive aluminum foil (1-1), an electrolyte (1-2), electrolytic paper (1-3) and a negative carbon foil (1-4), wherein the electrolyte (1-2) is filled at two sides of the electrolytic paper (1-3), the positive aluminum foil (1-1) is wrapped outside one side of the whole core package (1), and the negative carbon foil (1-4) is wrapped outside the other side of the core package (1);
the manufacturing method comprises the following steps:
step one, core package is obtained
Winding the positive aluminum foil, the carbonization-free electrolytic paper and the lead negative carbon foil to form a core package;
step two formation repair
Electrifying and repairing the core package in an aluminum foil repairing liquid, wherein the aluminum foil repairing liquid consists of one or more of ammonium adipate, ammonium dihydrogen phosphate, phosphoric acid and tartaric acid, and the electrified voltage is not less than the withstand voltage of the anode aluminum foil;
step three impregnation wetting agent
Wetting the formed core package in a prepared wetting agent, wherein the wetting agent adopts a surfactant with high temperature resistance not less than 150 ℃, the surfactant adopts a fluorocarbon surfactant, and the concentration of the surfactant is controlled to be 0.1-1.0%;
drying the core package impregnated with the wetting agent, wherein the drying temperature is controlled to be between 105 ℃ and 200 ℃ and is lower than the decomposition temperature of the surfactant;
step four electrolyte formation
Impregnating a conductive polymer dispersion liquid with the particle size of 20-50nm in a vacuum and pressurization alternate circulation environment, wherein the dispersion liquid is one or more of poly (tri, tetraethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT/PSS), polypyrrole (PPy), polyaniline (PAn) or derivatives thereof, and then drying to form a bottom layer electrolyte;
impregnating conductive polymer dispersion liquid with the grain diameter of 50-100nm in a vacuum and pressurization alternate circulation environment, wherein the dispersion liquid is one or more of poly (tri, tetraethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT/PSS), polypyrrole (PPy), polyaniline (PAn) or derivatives thereof, and then drying to form an upper layer electrolyte;
the double-layer electrolyte is combined to form a high-molecular conductive electrolyte with good conductivity and current impact resistance;
step five assembled capacitor
Assembling the formed electrolyte core package into an aluminum shell and a rubber cover, wherein the assembly must be carried out in a dry and clean environment to avoid mixing of moisture and other impurities, and the rubber cover is made of butyl rubber;
six-step aging capacitor
And (3) carrying out voltage addition, aging and repairing on the capacitor at the temperature of 105 ℃, wherein the final aged voltage is not lower than 1.2 times of the rated voltage of the capacitor.
2. The highly reliable solid state aluminum electrolytic capacitor of claim 1 wherein: the electrolytic paper (1-3) is chemical fiber electrolytic paper.
3. The highly reliable solid state aluminum electrolytic capacitor of claim 1 wherein: the electrolytic paper (1-3) is composed of 100% of chemical fiber or 10-20% of hemp pulp and 80-90% of chemical fiber.
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| CN205050704U (en) * | 2015-06-16 | 2016-02-24 | 北京七一八友益电子有限责任公司 | High voltage piece formula conductive polymer tantalum electrolytic capacitor |
| CN106356193A (en) * | 2016-10-25 | 2017-01-25 | 益阳市和天电子有限公司 | Capacitor taking conductive carbon foil/ceramic foil as negative electrode |
| CN106683912A (en) * | 2016-12-14 | 2017-05-17 | 益阳艾华富贤电子有限公司 | Method for producing low leakage winding type solid electrolytic capacitor |
| CN107887167A (en) * | 2017-11-09 | 2018-04-06 | 益阳市万京源电子有限公司 | A kind of preparation method of Non-carbonized solid capacitor |
| CN109686568A (en) * | 2019-01-14 | 2019-04-26 | 珠海格力新元电子有限公司 | Capacitor and preparation method thereof |
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