CN110676056A - Preparation method of Al/C composite foil for aluminum electrolytic capacitor - Google Patents
Preparation method of Al/C composite foil for aluminum electrolytic capacitor Download PDFInfo
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- CN110676056A CN110676056A CN201910748164.5A CN201910748164A CN110676056A CN 110676056 A CN110676056 A CN 110676056A CN 201910748164 A CN201910748164 A CN 201910748164A CN 110676056 A CN110676056 A CN 110676056A
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- CN
- China
- Prior art keywords
- composite foil
- foil
- electrolytic capacitor
- aluminum electrolytic
- aluminum
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- Pending
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- 239000011888 foil Substances 0.000 title claims abstract description 77
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 63
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000003990 capacitor Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 238000007650 screen-printing Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000007639 printing Methods 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- 229910052786 argon Inorganic materials 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
- 239000006229 carbon black Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- PHYFQTYBJUILEZ-UHFFFAOYSA-N Trioleoylglycerol Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC(OC(=O)CCCCCCCC=CCCCCCCCC)COC(=O)CCCCCCCC=CCCCCCCCC PHYFQTYBJUILEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000001361 adipic acid Substances 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- PHYFQTYBJUILEZ-IUPFWZBJSA-N triolein Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CCCCCCCC)COC(=O)CCCCCCC\C=C/CCCCCCCC PHYFQTYBJUILEZ-IUPFWZBJSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 7
- 229940117972 triolein Drugs 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 11
- 239000007787 solid Substances 0.000 description 10
- 229920001940 conductive polymer Polymers 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- BAECOWNUKCLBPZ-HIUWNOOHSA-N Triolein Natural products O([C@H](OCC(=O)CCCCCCC/C=C\CCCCCCCC)COC(=O)CCCCCCC/C=C\CCCCCCCC)C(=O)CCCCCCC/C=C\CCCCCCCC BAECOWNUKCLBPZ-HIUWNOOHSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research 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
-
- 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
- H01G9/0425—Electrodes or formation of dielectric layers thereon characterised by the material specially adapted for cathode
-
- 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
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
Abstract
The invention discloses a preparation method of an Al/C composite foil for an aluminum electrolytic capacitor, which comprises the following steps: adding the crystalline flake graphite, a dispersing agent, an organic binder, organic resin and a surfactant into absolute ethyl alcohol according to the weight ratio of 70-90: 5-25: 8-28: 1-2, uniformly stirring, and dispersing by using ultrasonic waves to obtain carbon slurry; printing the carbon slurry on the surface of the pretreated aluminum foil through a screen printing method to obtain an Al/C composite foil prefabricated product; and winding the Al/C composite foil prefabricated product together for heat treatment, wherein the heating rate is 4 ℃/min, the heat treatment temperature is 400 ℃ and 600 ℃, and the time is 2-12h, so as to obtain the Al/C composite foil. The method has the advantages of simple process, safe and environment-friendly preparation process, low cost and high specific capacitance of the prepared Al/C composite foil for the solid-state aluminum electrolytic capacitor.
Description
Technical Field
The invention relates to the field of aluminum electrolytic capacitors, in particular to a preparation method of an Al/C composite foil for an aluminum electrolytic capacitor.
Background
The traditional aluminum electrolytic capacitor has great obstacles in low resistance and chip formation and application in high frequency and high and low temperature regions due to the use of liquid electrolyte, and is difficult to meet the requirements of electronic technology on capacitor miniaturization and chip formation, so that the industry of the traditional aluminum electrolytic capacitor is stressed. The solid polymer aluminum electrolytic capacitor using the conductive polymer as the actual cathode well overcomes the defects, and the solid polymer aluminum electrolytic capacitor not only has all the characteristics of the liquid aluminum electrolytic capacitor, but also overcomes a plurality of inherent defects of the liquid aluminum electrolytic capacitor due to the fact that the conductive polymer material with high conductivity and good thermal stability is used as the electrolyte, has the characteristics of good reliability, long service life, low impedance at high frequency, extreme large ripple current resistance and the like, and gradually replaces the liquid aluminum electrolytic capacitor from the development trend in recent years.
The aluminum foil is an electrode material of an aluminum electrolytic capacitor, is also an important material of a current collector of an energy storage device such as a super capacitor and a lithium ion battery, has important influence on the performance of the device, and is an important way for improving the performance of the device by coating modification. The solid-state aluminum electrolytic capacitor has the advantages that the temperature characteristic, the internal resistance, the loss factor, the frequency characteristic, the service life and other properties of the solid-state aluminum electrolytic capacitor are obviously superior to those of the traditional aluminum electrolytic capacitor, and the solid-state aluminum electrolytic capacitor is an important development direction of the aluminum electrolytic capacitor. In recent years, researches show that the A1/C composite foil formed by the aluminum surface composite carbon layer can effectively reduce the interface resistance of aluminum and active materials, improve the affinity and the surface area and greatly improve the performance of devices. In particular, Al/C composite foil becomes an indispensable key material of the solid polymer aluminum electrolytic capacitor, and has great significance for the development of the solid polymer aluminum electrolytic capacitor industry. The prior art adopts a chemical vapor deposition process to form a carbon layer on an aluminum foil, but the process has the problems of complex equipment, high cost and the like.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, an object of the present invention is to provide a method for preparing an Al/C composite foil for an aluminum electrolytic capacitor, which employs relatively simple processing equipment and reduces the cost.
The technical scheme is as follows:
a preparation method of Al/C composite foil for an aluminum electrolytic capacitor comprises the following steps:
adding the crystalline flake graphite, a dispersing agent, an organic binder, organic resin and a surfactant into absolute ethyl alcohol according to the weight ratio of 70-90: 5-25: 8-28: 1-2, uniformly stirring, and dispersing by using ultrasonic waves to obtain carbon slurry;
printing the carbon slurry on the surface of the pretreated aluminum foil through a screen printing method to obtain an Al/C composite foil prefabricated product;
winding the Al/C composite foil prefabricated product together for heat treatment, wherein the heating rate is 4 ℃/min, the heat treatment temperature is 400 ℃ and 600 ℃, and the time is 2-12h, so as to obtain the Al/C composite foil;
activating the Al/C composite foil in the air or steam atmosphere at the temperature of 300-500 ℃ for 2-8h to obtain an activated Al/C composite foil;
and carrying out formation treatment on the activated Al/C composite foil in a formation electrolyte, wherein the formation electrolyte comprises one or more of boric acid, phosphoric acid and adipic acid, and the Al/C composite foil for the aluminum electrolytic capacitor is obtained.
Preferably, the pretreatment is to soak the aluminum foil in a 12% NaOH solution at 10-20 ℃ for 10-300 seconds, wash the aluminum foil with clear water, dehydrate the aluminum foil with absolute ethyl alcohol or acetone, and blow the aluminum foil with cold air.
Preferably, the flake graphite, the dispersing agent, the organic binder, the organic resin and the surface are preferably selected, and the stirring speed of the active agent added into absolute ethyl alcohol is 600 r/min.
Preferably, the organic binder is one of polyvinyl alcohol, polyvinyl butyral, epoxy resin, phenolic resin, acrylic resin, polyurethane and paraffin.
Preferably, the dispersant is one of a dispersant for carbon black, glycerol trioleate and a potassium salt dispersant.
Preferably, the time for ultrasonic dispersion is 40-50 min.
Preferably, the tools used in the screen printing method are a manual wire mesh frame and a rubber scraper.
Preferably, the protective atmosphere for the heat treatment is argon.
Has the advantages that: compared with the prior art, the method has the advantages that in the process of preparing the Al/C composite foil for the aluminum electrolytic capacitor, the process is simple, the preparation process is safe and environment-friendly, the cost is low, and the specific capacitance of the prepared carbon/aluminum composite cathode foil for the solid aluminum electrolytic capacitor is high. Compared with the traditional corrosion aluminum foil, the A1/C composite foil plays a role in reducing the internal resistance and the loss factor of the solid polymer aluminum electrolytic capacitor. The A1/C composite foil replaces corrosion aluminum foil as cathode foil to optimize the performance of the solid polymer aluminum electrolytic capacitor, and the A1/C composite foil is derived from the improvement effect of a carbon layer on the state of a polymer conductive polymer layer polymerized on the cathode foil. The prepared solid polymer aluminum electrolytic capacitor still keeps excellent electrical property when the life test time reaches 250h at 145 ℃, and proves that the developed A1/C composite foil has excellent stability over time. The A1/C composite foil has too low bending resistance times, so that cracks are seriously expanded after riveting, the foil breaking phenomenon is serious during winding, and the yield is reduced.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
A preparation method of an Al/C composite foil for an aluminum electrolytic capacitor specifically comprises the following steps:
adding the crystalline flake graphite, a dispersing agent, an organic binder, organic resin and a surfactant into absolute ethyl alcohol according to the weight ratio of 80: 18: 15: 1.5, uniformly stirring, and dispersing by using ultrasonic waves to obtain carbon slurry; printing the carbon slurry on the surface of the pretreated aluminum foil through a screen printing method to obtain an Al/C composite foil prefabricated product; coiling the Al/C composite foil prefabricated product together for heat treatment, wherein the heating rate is 4 ℃/min, the heat treatment temperature is 500 ℃, and the time is 8h, so as to obtain the Al/C composite foil; activating the Al/C composite foil for 5 hours at 400 ℃ in air or water vapor atmosphere to obtain an activated Al/C composite foil; and carrying out formation treatment on the activated Al/C composite foil in a formation electrolyte, wherein the formation electrolyte comprises boric acid, and the Al/C composite foil for the aluminum electrolytic capacitor is obtained. The pretreatment is to soak the aluminum foil in 12 percent NaOH solution for 200 seconds at 15 ℃, to be washed by clean water, to be dehydrated by absolute ethyl alcohol or acetone, and to be dried by cold air. Adding the crystalline flake graphite, a dispersing agent, an organic binder, organic resin and a surfactant into absolute ethyl alcohol, and stirring at the speed of 600 r/min. The organic binder is polyvinyl alcohol, and the dispersant is dispersant for carbon black. The ultrasonic dispersion time is 40-50 min. The tools used in the screen printing method are a manual silk screen frame and a rubber scraper. The protective atmosphere for the heat treatment was argon.
The A1/C composite foil replaces corrosion aluminum foil as cathode foil to optimize the performance of the solid polymer aluminum electrolytic capacitor, and the A1/C composite foil is derived from the improvement effect of a carbon layer on the state of a polymer conductive polymer layer polymerized on the cathode foil. The prepared solid polymer aluminum electrolytic capacitor still keeps excellent electrical property when the life test time reaches 250h at 145 ℃, and proves that the developed A1/C composite foil has excellent stability over time. The A1/C composite foil has too low bending resistance times, so that cracks are seriously expanded after riveting, the foil breaking phenomenon is serious during winding, and the yield is reduced.
Claims (8)
1. A preparation method of Al/C composite foil for an aluminum electrolytic capacitor is characterized by comprising the following steps:
adding the crystalline flake graphite, a dispersing agent, an organic binder, organic resin and a surfactant into absolute ethyl alcohol according to the weight ratio of 70-90: 5-25: 8-28: 1-2, uniformly stirring, and dispersing by using ultrasonic waves to obtain carbon slurry;
printing the carbon slurry on the surface of the pretreated aluminum foil through a screen printing method to obtain an Al/C composite foil prefabricated product;
winding the Al/C composite foil prefabricated product together for heat treatment, wherein the heating rate is 4 ℃/min, the heat treatment temperature is 400 ℃ and 600 ℃, and the time is 2-12h, so as to obtain the Al/C composite foil;
activating the Al/C composite foil in the air or steam atmosphere at the temperature of 300-500 ℃ for 2-8h to obtain an activated Al/C composite foil;
and carrying out formation treatment on the activated Al/C composite foil in a formation electrolyte, wherein the formation electrolyte comprises one or more of boric acid, phosphoric acid and adipic acid, and the Al/C composite foil for the aluminum electrolytic capacitor is obtained.
2. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the pretreatment is to soak the aluminum foil in a 12% NaOH solution at 10-20 ℃ for 10-300 seconds, wash the aluminum foil with clear water, dehydrate the aluminum foil with absolute ethyl alcohol or acetone, and blow the aluminum foil with cold air.
3. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the speed of adding the crystalline flake graphite, the dispersing agent, the organic binder, the organic resin and the surfactant into absolute ethyl alcohol and stirring is 600 r/min.
4. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the organic binder is one of polyvinyl alcohol, polyvinyl butyral, epoxy resin, phenolic resin, acrylic resin, polyurethane and paraffin.
5. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the dispersant is one of a dispersant for carbon black, glyceryl trioleate and a potassium salt dispersant.
6. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the ultrasonic dispersion time is 40-50 min.
7. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the tools adopted by the screen printing method are a manual silk screen frame and a rubber scraper.
8. The method for producing an Al/C composite foil for an aluminum electrolytic capacitor according to claim 1, characterized in that: the protective atmosphere of the heat treatment is argon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748164.5A CN110676056A (en) | 2019-08-14 | 2019-08-14 | Preparation method of Al/C composite foil for aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748164.5A CN110676056A (en) | 2019-08-14 | 2019-08-14 | Preparation method of Al/C composite foil for aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110676056A true CN110676056A (en) | 2020-01-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910748164.5A Pending CN110676056A (en) | 2019-08-14 | 2019-08-14 | Preparation method of Al/C composite foil for aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
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| CN (1) | CN110676056A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03165508A (en) * | 1989-11-24 | 1991-07-17 | Showa Alum Corp | Aluminum alloy for cathode foil of electrolytic capacitor |
| CN101923961A (en) * | 2010-07-27 | 2010-12-22 | 武汉科技大学 | Carbon/aluminum composite cathode foil for solid aluminum electrolytic capacitor and preparation method thereof |
| CN108666139A (en) * | 2018-03-30 | 2018-10-16 | 益阳艾华富贤电子有限公司 | Anode foils and aluminium electrolutic capacitor production method |
| CN109786137A (en) * | 2019-01-31 | 2019-05-21 | 深圳新宙邦科技股份有限公司 | A kind of solid-state capacitor preparation method |
-
2019
- 2019-08-14 CN CN201910748164.5A patent/CN110676056A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03165508A (en) * | 1989-11-24 | 1991-07-17 | Showa Alum Corp | Aluminum alloy for cathode foil of electrolytic capacitor |
| CN101923961A (en) * | 2010-07-27 | 2010-12-22 | 武汉科技大学 | Carbon/aluminum composite cathode foil for solid aluminum electrolytic capacitor and preparation method thereof |
| CN108666139A (en) * | 2018-03-30 | 2018-10-16 | 益阳艾华富贤电子有限公司 | Anode foils and aluminium electrolutic capacitor production method |
| CN109786137A (en) * | 2019-01-31 | 2019-05-21 | 深圳新宙邦科技股份有限公司 | A kind of solid-state capacitor preparation method |
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Application publication date: 20200110 |