CN101320625A - Solid electrolytic capacitor and method of processing the same - Google Patents
Solid electrolytic capacitor and method of processing the same Download PDFInfo
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- CN101320625A CN101320625A CN 200810023080 CN200810023080A CN101320625A CN 101320625 A CN101320625 A CN 101320625A CN 200810023080 CN200810023080 CN 200810023080 CN 200810023080 A CN200810023080 A CN 200810023080A CN 101320625 A CN101320625 A CN 101320625A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 59
- 239000007787 solid Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 7
- 239000010410 layer Substances 0.000 claims abstract description 23
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 5
- 239000005518 polymer electrolyte Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 28
- 239000000835 fiber Substances 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 13
- 239000007784 solid electrolyte Substances 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 9
- 229920001940 conductive polymer Polymers 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000005030 aluminium foil Substances 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229920000867 polyelectrolyte Polymers 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052785 arsenic Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 229920002955 Art silk Polymers 0.000 claims description 3
- 241000790917 Dioxys <bee> Species 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N n-Butanol Substances CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000012719 thermal polymerization Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 3
- 238000005868 electrolysis reaction Methods 0.000 abstract 2
- 239000002344 surface layer Substances 0.000 abstract 2
- 238000012856 packing Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000004744 fabric Substances 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 238000009941 weaving Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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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
- H01G9/02—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
- H01G9/028—Organic semiconducting electrolytes, e.g. TCNQ
-
- 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
-
- 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)
- Electrochemistry (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention provides a solid electrolysis capacitor with small impedance, large electric capacity, stronger thermal endurance and weathering resistance. The product may not be broken because of transportation for high yield and strong capability for bearing external force of the product. Thus, the invention further provides a process method of capacitors, comprising: an anode film, an anode, a cathode film, a cathode and a conductivity high polymer electrolyte layer between the anode film and the cathode film. Surface of the anode film covers an oxidation electric surface layer. Carrier of the conductivity high polymer electrolyte layer is a separation layer, characterized in that the separation layer is a film containing carbon fibres. Process method of capacitors comprises steps of: regarding etched conduction metal foil as the anode film, of which the surface is treated with anode oxidation to form the oxidation electric surface layer, the anode film leading a lead form an anode; manufacturing the cathode film by using the metal foil and leading the lead to form a cathode; winding the anode film, the cathode film and the separation layer between them into a cylinder shape to complete subassemblies of the capacitor; finally, packing subassemblies of the capacitor into a box, or covering with a protection layer to obtain the solid electrolysis capacitor.
Description
(1) technical field
The present invention relates to capacitor, be specially a kind of solid electrolytic capacitor and processing method thereof.
(2) background technology
As everyone knows, the basic role of capacitor is exactly charge and discharge, the effect that discharges and recharges that this is basic, the circuit phenomenon of deriving out many makes capacitor can be used in many different occasions, for example, in electro-motor, capacitors available produces phase shifts, and in the photoflash lamp of taking pictures, capacitors available is come energy-producing sparking; And in electronic circuit, capacitor also has many different purposes, and for example, in fact by-pass capacitor can be used as smoothing capacitor, also can be used as rectifier, yet, these many different purposes of capacitor, the basic role that discharges and recharges is for consistent.
Capacitor can be divided into electrochemical capacitor and non-electrolytic capacitor substantially according to its function.And electrolytic capacitor can be divided into aluminium matter and tantalum matter two big classes according to anodal material.Wherein with aluminum electrolytic capacitor for the most common, aluminum electrolytic capacitor can be divided into according to its assembly structure: 1. convoluted, 2. stack-up type.Kenel according to electrolyte is classified, and two kinds of liquid electrolytic capacitor and solid electrolytic capacitors are also arranged.Wherein, the former life-span is decided by the time that electrolyte is dry, thus if under 105 ℃ situation, can operate 1000 hours liquid electrolytic capacitor, 10 ℃ of the every declines of its operating temperature, the life-span can double.And the electrolyte of solid electrolytic capacitor because of being solid-state, does not promptly have the dry anxiety of electrolyte, so the tool life-span is long.
Therefore electrolytic capacitor can make the big capacitor of volume low capacity because the dielectric medium film can be done very thinly, is the major part of large value capacitor, but electrolytic capacitor has many shortcomings again, for example, its temperature characterisitic is poor, and leakage current and dielectric loss are big etc.In addition when electric polarity during by reversal connection, or the two poles of the earth institutes is when voltage exceeds specification in addition, its security feature is with destroyed, electrolyte will be by gasification and quick-fried slurry, cause the damage of electrolytic capacitor, and involve electronic circuit, cause the damage of electronic installations such as motherboard, this kind situation, especially with liquid electrolytic capacitor for very.
Present used conventional aluminum electrolytic capacitor, be with through overetched raffinal paper tinsel as anode film, its surface film for crossing through anodized is as dielectric substance layer.Between cathodic coating and anode film, then be with thin paper or the formed separator of cloth film, its electrolyte system is adsorbed by this thin paper or cloth film.And the separator of solid electrolytic capacitor preferably with various fibers as the non-weaving cloth of main material or the barrier paper of carbonization.Non-weaving cloth is to utilize fiber is carried out orientation or Boulez at random, form fiber weave structure, adopt machinery then, method is fixed forms for the glutinous or chemistry of heat etc., though it has the function of isolating anode film and cathodic coating, but, its for electrolytical adsorption capacity a little less than, the adhesion of anode film and cathodic coating is also relatively poor, causes gapped existence between itself and anode film and the cathodic coating, and impedance increases, and capacitance reduces.
Barrier paper is a porousness because of itself paper material then, and electrolyte is had preferable absorbability.Because this cause of barrier paper as non-conductive material, though preferable adsorption capacity is arranged, the big shortcoming of impedance is arranged, not good shortcomings such as thermal endurance, weatherability are also arranged, so cause the lost of life of electrolytic capacitor.Though with the insulation impedance of barrier paper carbonization with the reduction isolation, prolong the electrolytic capacitor life-span, still, very fragility and structural instability but become after the barrier paper carbonization, and be difficult to bear external force, do not cause electrolytic capacitor stability during fabrication good and cause yield low on the contrary.On the other hand, because the loosely organized instability of the sheathing paper of carbonization, the capacitor that also causes easily making suffers outside destroy and influences its electrical characteristic in the haulage process, and involves electronic circuit.
(3) summary of the invention
At the problems referred to above, the invention provides a kind of solid electrolytic capacitor, the impedance of capacitor is little, capacitance is big, has stronger thermal endurance, weatherability, the yield of products height, the ability of bearing external force is strong, can be because of carrying does not cause breakage, for this reason, the present invention also provides a kind of processing method of solid electrolytic capacitor.
A kind of solid electrolytic capacitor, it comprises the electroconductive polymer polyelectrolyte floor between anode film, anode, cathodic coating, negative electrode and anode film and the cathodic coating, described anode film surface coverage oxidation dielectric top layer, the carrier of described electroconductive polymer polyelectrolyte floor is a separator, it is characterized in that: described separator is the film that contains the carbon fibre.
It is further characterized in that: the base material of described anode film is an aluminium foil; The base material of separator contains carbonized polyacrylonitrile fibre, pitch-based carbon fiber or artificial silk based carbon fiber.
A kind of processing method of solid electrolytic capacitor, it is characterized in that: it may further comprise the steps, will be through overetched conductive metal foil as anode film, its surface is through anodized, and formation oxidation dielectric top layer, anode film is heat-treated under proper temperature, make the stability of characteristics on oxidation dielectric top layer, anode film is also drawn lead and is anode; And anode film is made with aluminium foil; Make cathodic coating and draw lead and become negative electrode with metal forming; Anode film, cathodic coating and the separator between anode film and cathodic coating are wound into cylindric, promptly finish capacitance component, and separator are a porous matter, are wherein adsorbing solid electrolyte, and are becoming the conductionization separator; Perhaps anode film, cathodic coating are clipped separator and reel impregnated in and comprise 3 of n-n-butanol, after plug fen of 4-second dioxy and p-p-methyl benzenesulfonic acid iron (III) the electrolyte mixed solution, give thermal polymerization, and between anode film, cathodic coating, form the electric conductive polymer layer, promptly finish capacitance component;
At last capacitance component is enclosed a box body, or the protective layer that is covered, solid electrolytic capacitor promptly finished.
It is further characterized in that: anode film, cathodic coating are clipped separator and reel impregnated in and comprise poly-plug fen system, poly-arsenic is pressed against after the electric conductive polymer electrolyte mixed solution, forms dielectric substrate, can also form the wrong salt solid electrolyte layer of TCNQ; And separator adsorbs solid electrolytes such as electroconductive polymer list amount body with coating method.
In the above-mentioned technology of the present invention, the carbon fibre has high temperature resistant, anti-ablation, thermal coefficient of expansion is little, conductivity is good and high-intensity characteristic, and the fibre diameter of carbon fibre is very fine, even little of the rice in how.To contain the non-weaving cloth of carbon fibre, paper etc. are as separator, the thickness of its separator is than general non-weaving cloth, paper etc. greatly reduce, simultaneously, fine and the non-weaving cloth synthetic fibers of carbon, between the paper fiber, formed the space that can hold electroconductive polymer list amount body solid electrolyte, promoted the adsorption capacity of separator greatly for electroconductive polymer list amount body solid electrolyte, in addition, the existence of carbon fibre makes the thermal endurance of separator and weatherability greatly improve, capacitor causes explosion because operate under the situation of high temperature, the damage electronic circuit, even the situation of electronic installation can be exempted.
And, the existence of carbon fibre, cause the thickness of separator greatly to reduce, gap between separator and anode film, the cathodic coating reduces, and capacitor can be made forr a short time, and impedance is lowered, capacitance promptly increases, owing to the high-strength characteristic of carbon fibre, separator promptly is unlikely one and is subjected to the i.e. damage of bump again, and yields can greatly improve during manufacturing.
(4) description of drawings
Fig. 1 is the schematic diagram of capacitance component of the present invention;
Fig. 2 is the generalized section of solid electrolytic capacitor of the present invention.
(5) embodiment
See Fig. 1, Fig. 2, the present invention includes and form the electroconductive polymer polyelectrolyte floor between anode film 4, anode 4a, cathodic coating 5, negative electrode 5a and anode film 4 and the cathodic coating 5, anode film 4 surface coverage oxidation dielectric top layers, the carrier of electroconductive polymer polyelectrolyte floor is a separator 6; The base material of separator 6 contains carbonized polyacrylonitrile fibre, pitch-based carbon fiber or artificial silk based carbon fiber.The base material of anode film 4 is an aluminium foil;
Below in conjunction with accompanying drawing processing method of the present invention is described:
Will be through overetched conductive metal foil as anode film 4, its surface is through anodized, and heat-treat anode film 4 on formation oxidation dielectric top layer under proper temperature (as 280 ℃), make the stability of characteristics on oxidation dielectric top layer, anode film 4 is drawn lead and is anode 4a; And, anode film 4 preferable for to make with aluminium foil; Make cathodic coating 5 and draw lead and become negative electrode 5a with metal forming; Anode film 4, cathodic coating 5 and the separator 6 between anode film 4 and cathodic coating 5 are wound into cylindric, promptly finish capacitance component 2, and separator 6 are a porous matter, are wherein adsorbing solid electrolyte, and are becoming conductionization separator 6; Perhaps anode film 4, cathodic coating 5 are clipped separator 6 and reel impregnated in and comprise 3 of n-n-butanol, after plug fen of 4-second dioxy and p-p-methyl benzenesulfonic acid iron (III) the electrolyte mixed solution, give thermal polymerization, and 5 of anode film 4, cathodic coatings, form the electric conductive polymer layer, promptly finish capacitance component 2.
At last capacitance component 2 is enclosed a box body 3, or the protective layer that is covered, solid electrolytic capacitor 1 promptly finished.
Can adopt poly-plug fen system among the present invention, poly-arsenic is pressed against electric conductive polymer, forms dielectric substrate, can also form the solid electrolyte layer of the wrong salt of TCNQ etc., replaces the electric conductive polymer layer.TCNQ is the electron acceptor CAS registration number of a kind of synthetic electron transfer (CT) material: 1518-16-7, molecular formula: C
12H
4N
4, molecular weight: 204.19.Above-mentioned solid electrolytic capacitor can be electroconductive polymer list amount body, and separator 6 can make solid electrolytes such as its absorption electroconductive polymer list amount body with coating.And electroconductive polymer list amount body is for poly-plug fen system, poly-arsenic are pressed against, polyaniline etc.
Claims (7)
1, a kind of solid electrolytic capacitor, it comprises the electroconductive polymer polyelectrolyte floor between anode film, anode, cathodic coating, negative electrode and anode film and the cathodic coating, described anode film surface coverage oxidation dielectric top layer, the carrier of described electroconductive polymer polyelectrolyte floor is a separator, it is characterized in that: described separator is the film that contains the carbon fibre.
2, according to the described a kind of solid electrolytic capacitor of claim 1, it is characterized in that: the base material of described anode film is an aluminium foil.
3, according to the described a kind of solid electrolytic capacitor of claim 1, it is characterized in that: the base material of described separator contains carbonized polyacrylonitrile fibre, pitch-based carbon fiber or artificial silk based carbon fiber.
4, a kind of processing method of solid electrolytic capacitor, it is characterized in that: it may further comprise the steps, will be through overetched conductive metal foil as anode film, its surface is through anodized, and formation oxidation dielectric top layer, anode film is heat-treated under proper temperature, make the stability of characteristics on oxidation dielectric top layer, anode film is also drawn lead and is anode; And what anode film was preferable makes with aluminium foil; Make cathodic coating and draw lead and become negative electrode with metal forming; Anode film, cathodic coating and the separator between anode film and cathodic coating are wound into cylindric, promptly finish capacitance component, and separator are a porous matter, are wherein adsorbing solid electrolyte, and are becoming the conductionization separator; Perhaps anode film, cathodic coating are clipped separator and reel impregnated in and comprise 3 of n-n-butanol, after plug fen of 4-second dioxy and p-p-methyl benzenesulfonic acid iron (III) the electrolyte mixed solution, give thermal polymerization, and between anode film, cathodic coating, form the electric conductive polymer layer, promptly finish capacitance component; At last capacitance component is enclosed a box body, or the protective layer that is covered, solid electrolytic capacitor promptly finished.
5, according to the processing method of the described a kind of solid electrolytic capacitor of claim 4, it is characterized in that: anode film, cathodic coating are clipped separator and reel impregnated in and comprise poly-plug fen system, poly-arsenic is pressed against after the electric conductive polymer electrolyte mixed solution, forms dielectric substrate.
6, according to the processing method of the described a kind of solid electrolytic capacitor of claim 4, it is characterized in that: described dielectric substrate is the wrong salt solid electrolyte layer of TCNQ.
7, according to the processing method of the described a kind of solid electrolytic capacitor of claim 4, it is characterized in that: described separator adsorbs solid electrolytes such as electroconductive polymer list amount body with coating method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810023080 CN101320625A (en) | 2008-07-14 | 2008-07-14 | Solid electrolytic capacitor and method of processing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810023080 CN101320625A (en) | 2008-07-14 | 2008-07-14 | Solid electrolytic capacitor and method of processing the same |
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| Publication Number | Publication Date |
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| CN101320625A true CN101320625A (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810023080 Pending CN101320625A (en) | 2008-07-14 | 2008-07-14 | Solid electrolytic capacitor and method of processing the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461295A (en) * | 2018-02-26 | 2018-08-28 | 深圳江浩电子有限公司 | High-energy solid-liquid mixed aluminum electrolytic capacitor and preparation method thereof |
-
2008
- 2008-07-14 CN CN 200810023080 patent/CN101320625A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461295A (en) * | 2018-02-26 | 2018-08-28 | 深圳江浩电子有限公司 | High-energy solid-liquid mixed aluminum electrolytic capacitor and preparation method thereof |
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