CN115188596A - Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition - Google Patents

Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition Download PDF

Info

Publication number
CN115188596A
CN115188596A CN202211049355.0A CN202211049355A CN115188596A CN 115188596 A CN115188596 A CN 115188596A CN 202211049355 A CN202211049355 A CN 202211049355A CN 115188596 A CN115188596 A CN 115188596A
Authority
CN
China
Prior art keywords
aluminum foil
aluminum
foil
electrodeposition
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211049355.0A
Other languages
Chinese (zh)
Inventor
陈志斌
白光珠
史瑞科
王立强
田宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Rare Metal Materials Research Institute Co Ltd
Original Assignee
Xian Rare Metal Materials Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Rare Metal Materials Research Institute Co Ltd filed Critical Xian Rare Metal Materials Research Institute Co Ltd
Priority to CN202211049355.0A priority Critical patent/CN115188596A/en
Publication of CN115188596A publication Critical patent/CN115188596A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052—Sintered electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors

Abstract

The invention discloses a method for preparing an aluminum electrolytic capacitor anode foil based on electrodeposition, which comprises the following steps: 1. preparing slurry; 2. coating the slurry; 3. sintering; 4. boiling in water and drying; 5. heat treatment; 6. cleaning and drying after electrodeposition; 7. heat treatment; 8. and cleaning and drying after the formation treatment to obtain the aluminum electrolytic capacitor anode foil. The invention makes the spherical aluminum powder or/and spherical aluminum alloy powder into slurry to be coated on the surface of the aluminum foil substrate and sintered to form a porous layer, so that the aluminum foil has higher specific surface area and larger pores, and TiO is formed by combining electrodeposition and heat treatment 2 Forming an oxide film on the surface of the aluminum foil by chemical conversion to form Al with a dielectric constant ratio 2 O 3 Al having higher film dielectric constant 2 O 3 ‑TiO 2 Composite oxide film, improved electrolysisThe specific capacity of the anode foil of the capacitor meets the use requirements of medium and high voltage environments.

Description

Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition
Technical Field
The invention belongs to the technical field of aluminum electrolytic capacitors, and particularly relates to a method for preparing an aluminum electrolytic capacitor anode foil based on electrodeposition.
Background
The aluminum electrolytic capacitor has the advantages of high specific capacitance, low cost, small size and the like, and is widely applied to the fields of industrial control, household appliances, automobile electronics and the like. With the rapid development of the electronic industry, the requirements of large capacity and small volume of the aluminum electrolytic capacitor are increasingly urgent, and the capacity of the aluminum electrolytic capacitor is mainly determined by the anode foil, so that the requirement of higher specific capacity is provided for the anode foil. At present, anode foils of aluminum electrolytic capacitors mainly adopt corrosion foils, the technology of improving the specific surface area of aluminum foils and then improving the specific capacity of the anode foils by corrosion hole forming and hole expanding technologies is difficult to obtain a larger breakthrough, and waste acid generated in the corrosion process has larger environmental protection pressure.
In recent years, a method of sintering a porous layer on the surface of an aluminum foil substrate instead of etching a corrosion foil has been developed. For example, chinese patents CN 102714098B, CN 102804302A, CN 103688327A, CN 104409215A, CN 104919552B, CN 110993347B, CN 110993348a and CN 111146005B both mention sintering a porous aluminum or aluminum alloy powder layer on an aluminum foil substrate to increase the specific surface area of the aluminum foil, thereby increasing the specific capacity of the aluminum foil. However, in these patents, aluminum and aluminum alloy powders used for aluminum foils having high specific capacities are small powders having an average particle size of 10 μm or less, and the cost of the powder raw material is high. Compared with the powder with small particle size of less than 10 microns, the powder with large particle size of 10 microns to 20 microns is easier to prepare and lower in manufacturing cost, but the specific surface area of the powder with large particle size is smaller than that of the powder with small particle size; for aluminum foils with the same thickness, the specific capacity of the large-particle-size powder porous layer with a certain thickness sintered on the surface is smaller than that of the small-particle-size powder porous layer with the same thickness sintered on the surface. Therefore, there is a need to find a method which can utilize aluminum or aluminum alloy powder having a large particle size (average particle size of 10 μm to 20 μm) which is less expensive to manufacture and can provide a porous layer sintered on the surface of an aluminum foil substrate with a high specific capacity.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for preparing an aluminum electrolytic capacitor anode foil based on electrodeposition, which is used for solving the defects of the prior artA method. The method comprises the steps of coating raw material slurry on the surface of an aluminum foil substrate and sintering to form a porous layer, so that the aluminum foil has a higher specific surface area and larger pores, and forming TiO by combining electrodeposition and heat treatment 2 Forming an oxide film on the surface of the aluminum foil by chemical conversion to form Al with a dielectric constant ratio 2 O 3 Al having higher film dielectric constant 2 O 3 -TiO 2 The composite oxide film improves the specific capacity of the electrolytic capacitor anode foil, expands the average particle size of the raw material powder to 10-20 mu m, and solves the problem that the cost and the specific capacity of the preparation raw material are difficult to obtain simultaneously.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for preparing anode foil of an aluminum electrolytic capacitor based on electrodeposition is characterized by comprising the following steps:
step one, mixing and stirring spherical aluminum powder or/and spherical aluminum alloy powder with a solvent, a binder and a dispersant uniformly to obtain slurry;
coating the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate, and then carrying out vacuum drying;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1);
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1);
step eight, forming TiO on the surface obtained in the step seven 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode of the aluminum electrolytic capacitorA foil.
The invention firstly prepares spherical aluminum powder or/and spherical aluminum alloy powder into slurry to be coated on the surface of an aluminum foil substrate, the slurry forms a porous layer on the surface of the aluminum foil substrate after drying and sintering, so that the aluminum foil has higher specific surface area and larger pores, the aluminum foil with aluminum oxide on the surface is obtained by boiling and heat treatment, and then TiO is formed on the surface of the aluminum foil with aluminum oxide on the surface by electrodeposition and heat treatment 2 Forming an oxide film on the surface of the aluminum foil after chemical conversion treatment to form Al with a dielectric constant ratio 2 O 3 Al with higher film dielectric constant 2 O 3 -TiO 2 The aluminum electrolytic capacitor anode foil is obtained by compounding the oxide film, the specific capacity of the aluminum electrolytic capacitor anode foil is improved, and the aluminum electrolytic capacitor anode foil meeting the use requirements of medium and high voltage environments is obtained.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in that in the first step, the average grain diameters of the spherical aluminum powder and the spherical aluminum alloy powder are both 10-20 microns, and the mass purity is not lower than 99.95%; the solvent is at least one of absolute ethyl alcohol, glycerol, terpineol and glycol, the binder is at least one of polymethacrylate, polyvinyl alcohol, ethyl cellulose and carboxymethyl cellulose, and the dispersant is at least one of lecithin, oleic acid, polyethylene glycol and triethanolamine. According to the invention, the particle size of the raw material powder is controlled to provide a higher specific surface area and larger pores for the porous layer formed after the surface of the aluminum foil substrate is sintered, and impurities are prevented from being introduced by controlling the quality and purity of the raw material powder, so that the performance of the porous layer is ensured; by controlling the type of the solvent, the dissolution of the binder and the dispersant in the solvent is promoted, so that the slurry is easy to dry and has no residue after sintering; by controlling the type of the binder, the viscosity of the slurry is suitable for coating, the aluminum foil substrate does not lose powder after being coated and dried, and no residue is left after sintering; by controlling the type of the dispersing agent, the raw material powder is uniformly dispersed in the slurry, the slurry is not easy to layer, and no residue is left after sintering.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in that in the second step, the thickness of the aluminum foil substrate is 20-60 mu m, the two sides of the slurry are symmetrically coated on the upper surface and the lower surface of the aluminum foil substrate, the vacuum drying temperature is 80-150 ℃, and the thickness of the aluminum foil after being coated with the slurry and being subjected to vacuum drying is 120-180 mu m. The invention ensures that the aluminum foil has certain mechanical strength by controlling the thickness of the aluminum foil matrix; usually, a scraper is adopted for coating so as to easily control the thickness of the slurry coated on the surface of the aluminum foil substrate, and the surface of the aluminum foil is smooth after the slurry is dried; by controlling the two sides of the slurry to be symmetrically coated, the thickness difference of the slurry coated on the two sides of the aluminum foil substrate is reduced, the surface of the aluminum foil is ensured to be kept flat after sintering, and the subsequent boiling treatment and the electrodeposition treatment are facilitated; by controlling the thickness of the aluminum foil substrate which is coated with the slurry and then dried in vacuum, the slurry after sintering forms a porous layer with proper thickness on the surface of the aluminum foil substrate, so that the anode foil of the aluminum electrolytic capacitor has higher specific capacity, the reduction of the specific capacity of the aluminum foil after the water boiling treatment, the electro-deposition treatment and the formation treatment caused by too small thickness of the porous layer is avoided, and the aluminum foil after the water boiling treatment, the electro-deposition treatment and the formation treatment caused by too large thickness of the porous layer is also avoided to have higher hardness and be easy to break; according to the invention, by controlling the drying atmosphere and the drying temperature, impurities are prevented from being introduced, the volatilization of the solvent is promoted, and the powder layer formed after the slurry is dried is well combined with the aluminum foil substrate.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on electrodeposition is characterized in that the sintering process in the third step is as follows: heating from room temperature to 400-500 ℃ at a heating rate of 2-5 ℃/min, preserving heat for 4-8 h, then heating to 600-650 ℃ at a heating rate of 5-10 ℃/min, preserving heat for 6-12h, and then cooling along with a furnace; the atmosphere in the furnace in the sintering process is nitrogen, argon or vacuum. The invention adopts two-stage heating for sintering, the solvent, the binder and the dispersant which are remained in the powder layer on the surface of the aluminum foil substrate are removed in the first stage, the aluminum or aluminum alloy powder on the surface of the aluminum foil substrate is sintered into the porous layer in the second stage, and the porous layer and the aluminum foil substrate form the sintered aluminum foil with a sandwich structure.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in that the water boiling treatment in the fourth step is carried out by using deionized water at 100 ℃, and the water boiling time is 10min to 20min; the temperature of the vacuum drying is 100 ℃. According to the invention, the deionized water is adopted for boiling to prevent impurities from being introduced, and the hydrated alumina with proper thickness is formed on the surface of the aluminum foil by controlling the boiling time, so that the subsequent formation treatment is facilitated.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on electrodeposition is characterized in that in the fifth step, the temperature of the heat treatment is 480-520 ℃, and the time is 5-15min. The invention converts hydrated alumina into alumina by controlling the temperature and time of heat treatment, which is beneficial to the subsequent electrodeposition treatment.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in that in the sixth step, the electrodeposition process adopts titanium foil as the anode, aluminum foil with aluminum oxide on the surface as the cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.2 g/L-1 g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electrodeposition treatment is from 20V to 35V, and the electrodeposition time is from 5min to 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃. The invention controls I in the electrolyte 2 The electrolyte has good conductivity, and the aluminum foil surface with aluminum oxide on the cathode surface generates less gas in the electrodeposition process, so that the oxide film is prevented from cracking; by controlling the voltage of the electrodeposition so that the voltage is in a safe voltage range, the deposited TiO (OH) is effectively regulated 2 In combination with controlling the time of electrodeposition, on the deposited TiO (OH) 2 Adjusting the thickness of the film; and the introduction of impurities is avoided by adopting deionized water cleaning and vacuum drying. Generally, two titanium foil anodes are used and symmetrically placed on both sides of an aluminum foil cathode having alumina on the surface thereof, so that TiO (OH) is simultaneously deposited on both sides of the aluminum foil during electrodeposition 2 The deposition rate is improved.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in thatAnd seventhly, performing heat treatment at the temperature of 600-630 ℃ for 30min-60min. The invention enables TiO (OH) deposited on the surface of the aluminum foil to be controlled by controlling the temperature and the heat preservation time of the heat treatment 2 All converted to TiO 2 And the aluminum foil does not melt.
The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition is characterized in that boric acid solution with the mass concentration of 10% -20% is adopted in the formation treatment in the eighth step, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃. According to the invention, the composite oxide film with the dielectric constant higher than that of the alumina film is obtained on the surface of the aluminum foil through the formation treatment of the process parameters, so that the specific capacity of the anode foil is improved; deionized water cleaning and vacuum drying are adopted, so that impurities are prevented from being introduced.
Compared with the prior art, the invention has the following advantages:
1. the invention makes the spherical aluminum powder or/and spherical aluminum alloy powder into slurry to be coated on the surface of the aluminum foil substrate and to be sintered to form a porous layer, so that the aluminum foil has higher specific surface area and larger pores, and TiO is formed by combining electrodeposition and heat treatment 2 Forming an oxide film on the surface of the aluminum foil by chemical conversion treatment to form Al with dielectric constant ratio 2 O 3 Al with higher film dielectric constant 2 O 3 -TiO 2 The composite oxide film improves the specific capacity of the electrolytic capacitor anode foil and meets the use requirements of medium and high voltage environments.
2. The invention forms Al with dielectric constant ratio on the surface of the aluminum foil 2 O 3 Al having higher film dielectric constant 2 O 3 -TiO 2 The composite oxide film improves the specific capacity of the anode foil of the aluminum electrolytic capacitor, so that the average particle size of the raw material powder, namely aluminum and aluminum alloy powder, is enlarged to 10-20 mu m, and the cost of the preparation raw material is greatly reduced.
3. The invention adopts titanium foil as a titanium source in the electrodeposition process, has simple and easily obtained raw materials, and adopts two titanium foil anodes which are symmetrically arranged at two sides of an aluminum foil cathode with aluminum oxide on the surface, thereby TiO (OH) can be simultaneously deposited at two sides of the aluminum foil in the electrodeposition process 2 The deposition rate is improved.
4. The invention realizes the controllability of the electrodeposition rate and the electrodeposition thickness by controlling the voltage and the time of the electrodeposition, has safe operation, and carries out the thermal treatment on TiO (OH) 2 Conversion to TiO 2 The method has simple process and reduces the preparation difficulty.
The technical solution of the present invention is further described in detail by examples below.
Detailed Description
Example 1
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent of glycol, absolute ethyl alcohol, terpineol, a binder of ethyl cellulose and a dispersant of polyethylene glycol according to a mass ratio of 55; the average grain diameter of the spherical aluminum powder is 10 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 20 micrometers, the vacuum drying temperature is 80 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 120 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 400 ℃ at the heating rate of 2 ℃/min, preserving heat for 8 hours, then heating to 640 ℃ at the heating rate of 5 ℃/min, preserving heat for 6 hours, and then cooling along with the furnace; in the sintering process, the furnace atmosphere is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 10min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with the hydrated alumina on the surface obtained in the step four to obtain the aluminum foil with the alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, step fivePerforming electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface, cleaning, and drying in vacuum to obtain the aluminum foil with TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature by using titanium foil as anode, aluminum foil with aluminum oxide on surface as cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.6g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 20V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 600 ℃, and the time is 50min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.81 mu F/cm 2 。
The solvent in this embodiment may be at least one of absolute ethanol other than ethylene glycol, absolute ethanol, terpineol, glycerol, terpineol, and ethylene glycol, the binder may be at least one of polymethacrylate other than ethylcellulose, polyvinyl alcohol, ethylcellulose, and carboxymethyl cellulose, and the dispersant may be at least one of lecithin other than ethylene glycol, oleic acid, polyethylene glycol, and triethanolamine.
Comparative example 1
This comparative example comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent of glycol, absolute ethyl alcohol, terpineol, a binder of ethyl cellulose and a dispersant of polyethylene glycol according to a mass ratio of 55; the average grain diameter of the spherical aluminum powder is 10 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 20 micrometers, the vacuum drying temperature is 80 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 120 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 400 ℃ at the heating rate of 2 ℃/min, preserving heat for 8 hours, then heating to 640 ℃ at the heating rate of 5 ℃/min, preserving heat for 6 hours, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 10min; the temperature of the vacuum drying is 100 ℃;
fifthly, carrying out formation treatment on the aluminum foil with hydrated alumina on the surface obtained in the fourth step, and then cleaning and vacuum drying to obtain an aluminum electrolytic capacitor anode foil; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the comparative example reaches 0.56 mu F/cm 2 。
Comparing example 1 of the present invention with comparative example 1, it can be seen that the present invention forms Al having a dielectric constant ratio on the surface of the aluminum foil 2 O 3 Al having higher film dielectric constant 2 O 3 -TiO 2 The specific capacity of the electrolytic capacitor anode foil is improved by compounding the oxide film.
Example 2
The embodiment comprises the following steps:
uniformly mixing and stirring spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, terpineol, binder polymethacrylate, ethyl cellulose and dispersant polyethylene glycol according to a mass ratio of 55; the average grain diameter of the spherical 6061 aluminum alloy powder is 15 mu m, and the mass purity is 99.95 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 30 micrometers, the vacuum drying temperature is 110 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 130 micrometers;
thirdly, sintering the aluminum foil dried in the vacuum in the second step to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 430 ℃ at the heating rate of 5 ℃/min and preserving heat for 5h, then heating to 640 ℃ at the heating rate of 10 ℃/min and preserving heat for 7h, and then cooling along with the furnace; the atmosphere in the furnace is vacuum in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 480 ℃, and the time is 15min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.2g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 35V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the vacuum drying temperature is 100 ℃;
step seven,The surface obtained in the sixth step has TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (2); the temperature of the heat treatment is 630 ℃, and the time is 30min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.86 mu F/cm 2 。
Example 3
The embodiment comprises the following steps:
step one, uniformly mixing and stirring spherical aluminum powder, spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, terpineol, binder polyvinyl alcohol, ethyl cellulose, dispersant oleic acid and polyethylene glycol according to a mass ratio of 20; the average grain diameter of the spherical aluminum powder and the spherical 6061 aluminum alloy powder is 20 mu m, and the mass purity is 99.99 percent;
step two, symmetrically coating the two surfaces of the slurry obtained in the step one on the upper surface and the lower surface of an aluminum foil matrix by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 40 micrometers, the vacuum drying temperature is 90 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 150 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 450 ℃ at a heating rate of 5 ℃/min, preserving heat for 6 hours, heating to 650 ℃ at a heating rate of 10 ℃/min, preserving heat for 7 hours, and cooling along with the furnace; the atmosphere in the furnace is nitrogen in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 20min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with the hydrated alumina on the surface obtained in the step four to obtain the aluminum foil with the alumina on the surface; the temperature of the heat treatment is 520 ℃, and the time is 5min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature by using titanium foil as anode, aluminum foil with aluminum oxide on surface as cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.5g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 30V, and the electro-deposition time is 5min; deionized water is adopted in the cleaning process, and the vacuum drying temperature is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 620 ℃, and the time is 50min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 1.05 mu F/cm 2 。
Example 4
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, terpineol as a solvent, glycerol, carboxymethyl cellulose as a binder, ethyl cellulose, lecithin as a dispersant and polyethylene glycol according to a mass ratio of 60; the average grain diameter of the spherical aluminum powder is 20 mu m, and the mass purity is 99.95%;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 40 micrometers, the vacuum drying temperature is 150 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 180 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 500 ℃ at the heating rate of 2 ℃/min, preserving heat for 4h, then heating to 640 ℃ at the heating rate of 5 ℃/min, preserving heat for 10h, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 20min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 1g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 25V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 630 ℃, and the time is 60min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts a boric acid solution with the mass concentration of 20%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 1.18 mu F/cm 2 。
Example 5
The embodiment comprises the following steps:
step one, mixing and stirring spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, ethylene glycol, glycerol, binder polymethacrylate, ethyl cellulose, dispersant lecithin and polyethylene glycol uniformly according to a mass ratio of 60; the average grain diameter of the spherical 6061 aluminum alloy aluminum powder is 20 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 50 micrometers, the vacuum drying temperature is 120 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 160 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 450 ℃ at the heating rate of 5 ℃/min, preserving heat for 4h, then heating to 620 ℃ at the heating rate of 10 ℃/min, preserving heat for 9h, and then cooling along with the furnace; the atmosphere in the furnace is vacuum in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 480 ℃, and the time is 15min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature by using titanium foil as anode, aluminum foil with aluminum oxide on surface as cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.8g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 20V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the vacuum drying temperature is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 Heat treating the aluminum foil to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 630 ℃, and the time is 50min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 1.09 mu F/cm 2 。
Example 6
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent, namely absolute ethyl alcohol, glycerol, a binder, namely polymethacrylate, polyvinyl alcohol, a dispersant, namely lecithin and oleic acid according to a mass ratio of 65; the average grain diameter of the spherical aluminum powder is 10 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 60 micrometers, the vacuum drying temperature is 130 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 150 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 400 ℃ at a heating rate of 5 ℃/min, preserving heat for 7 hours, heating to 600 ℃ at a heating rate of 10 ℃/min, preserving heat for 11 hours, and cooling along with the furnace; the furnace atmosphere in the sintering process is nitrogen;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 10min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with the hydrated alumina on the surface obtained in the step four to obtain the aluminum foil with the alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 1g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 35V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the vacuum drying temperature is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 600 ℃, and the time is 30min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and vacuum-dried to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; the cleaning process adopts deionized water, and the vacuum drying is carried outThe temperature of (2) is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.83 mu F/cm 2 。
Example 7
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent of ethylene glycol, glycerol, a binder of polymethacrylate, polyvinyl alcohol and a dispersant of triethanolamine according to a mass ratio of 60; the average grain diameter of the spherical aluminum powder is 10 mu m, and the mass purity is 99.95%;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 40 micrometers, the vacuum drying temperature is 140 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 150 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 450 ℃ at the heating rate of 2 ℃/min, preserving heat for 5h, then heating to 630 ℃ at the heating rate of 5 ℃/min, preserving heat for 12h, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 480 ℃, and the time is 15min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature by using titanium foil as anode, aluminum foil with aluminum oxide on surface as cathode, and aluminum foilI 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 1g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 30V, and the electro-deposition time is 8min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 620 ℃, and the time is 55min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 15%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.93 mu F/cm 2 。
Example 8
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent, namely ethylene glycol, glycerol, a binder, namely carboxymethyl cellulose, and a dispersant, namely polyethylene glycol, according to the mass ratio of 55; the average grain diameter of the spherical aluminum powder is 15 mu m, and the mass purity is 99.99 percent;
step two, symmetrically coating the two surfaces of the slurry obtained in the step one on the upper surface and the lower surface of an aluminum foil matrix by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 30 micrometers, the vacuum drying temperature is 120 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 140 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 480 ℃ at the heating rate of 5 ℃/min and preserving heat for 6h, then heating to 640 ℃ at the heating rate of 10 ℃/min and preserving heat for 10h, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of (2) is 0.2g/L, and the mass ratio of acetone to deionized water is 100; the voltage of the electro-deposition treatment is 20V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 600 ℃, and the time is 60min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.89 mu F/cm 2 。
Example 9
The embodiment comprises the following steps:
uniformly mixing and stirring spherical 6061 aluminum alloy powder, a solvent of ethylene glycol, terpineol, glycerol, a binder of ethyl cellulose, a dispersant of triethanolamine and polyethylene glycol according to a mass ratio of 55; the average grain diameter of the spherical 6061 aluminum alloy powder is 20 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 50 micrometers, the vacuum drying temperature is 140 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 180 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 500 ℃ at the heating rate of 2 ℃/min, preserving heat for 8h, then heating to 650 ℃ at the heating rate of 5 ℃/min, preserving heat for 10h, and then cooling along with the furnace; the atmosphere in the furnace is vacuum in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 20min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with the hydrated alumina on the surface obtained in the step four to obtain the aluminum foil with the alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (2); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.5g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 35V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 Heat treating the aluminum foil to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (2); the temperature of the heat treatment is 630 ℃, and the time is 40min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts a boric acid solution with the mass concentration of 20%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 1.12 mu F/cm 2 。
Example 10
The embodiment comprises the following steps:
step one, uniformly mixing and stirring spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, terpineol, binder polyvinyl alcohol, ethyl cellulose, dispersant triethanolamine and oleic acid according to a mass ratio of 60; the average grain diameter of the spherical 6061 aluminum alloy powder is 10 mu m, and the mass purity is 99.95%;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 30 micrometers, the vacuum drying temperature is 100 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 140 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 450 ℃ at the heating rate of 2 ℃/min, preserving heat for 5 hours, then heating to 640 ℃ at the heating rate of 10 ℃/min, preserving heat for 8 hours, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 520 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (2); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 1g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 25V, and the electro-deposition time is 5min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 610 ℃, and the time is 50min;
step eight, forming TiO on the surface obtained in the step seven 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.85 mu F/cm 2 。
Example 11
The embodiment comprises the following steps:
step one, uniformly mixing and stirring spherical aluminum powder, a solvent of ethylene glycol, glycerol, a binder of carboxymethyl cellulose and a dispersant of polyethylene glycol according to the mass ratio of 50; the average grain diameter of the spherical aluminum powder is 15 mu m, and the mass purity is 99.99 percent;
step two, symmetrically coating the two surfaces of the slurry obtained in the step one on the upper surface and the lower surface of an aluminum foil matrix by adopting scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 20 micrometers, the vacuum drying temperature is 90 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 140 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 420 ℃ at the heating rate of 2 ℃/min and preserving heat for 7h, then heating to 650 ℃ at the heating rate of 5 ℃/min and preserving heat for 8h, and then cooling along with the furnace; the atmosphere in the furnace is vacuum in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 10min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 520 ℃, and the time is 5min;
step six, performing electrodeposition treatment on the aluminum foil with the surface being provided with the aluminum oxide obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the surface being provided with TiO (OH) 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as an electrolyte, wherein I in the electrolyte 2 The concentration of (2) is 0.2g/L, and the mass ratio of acetone to deionized water is 100; the voltage of the electro-deposition treatment is 35V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (2); the temperature of the heat treatment is 620 ℃, and the time is 55min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil of (a) is subjected to chemical conversion treatment,then cleaning and vacuum drying are carried out to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.88 mu F/cm 2 。
Example 12
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, terpineol as a solvent, glycerol, carboxymethyl cellulose as a binder, ethyl cellulose, lecithin as a dispersant and polyethylene glycol according to a mass ratio of 60; the average grain diameter of the spherical aluminum powder is 15 mu m, and the mass purity is 99.95%;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting a scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 30 micrometers, the vacuum drying temperature is 130 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 150 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 440 ℃ at the heating rate of 5 ℃/min and preserving heat for 6h, then heating to 640 ℃ at the heating rate of 5 ℃/min and preserving heat for 6h, and then cooling along with the furnace; the atmosphere in the furnace is vacuum in the sintering process;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with the hydrated alumina on the surface obtained in the step four to obtain the aluminum foil with the alumina on the surface; the temperature of the heat treatment is 480 ℃, and the time is 15min;
step six, performing electrodeposition on the aluminum foil with the aluminum oxide on the surface obtained in the step fiveCleaning, vacuum drying to obtain the product with TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.5g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 30V, and the electro-deposition time is 8min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 600 ℃, and the time is 60min;
step eight, forming TiO on the surface obtained in the step seven 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 15%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.96 mu F/cm 2 。
Example 13
The embodiment comprises the following steps:
step one, uniformly mixing and stirring spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, terpineol, binder polyvinyl alcohol, ethyl cellulose, dispersant triethanolamine and oleic acid according to the mass ratio of 55; the average grain diameter of the spherical 6061 aluminum alloy powder is 20 mu m, and the mass purity is 99.95%;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting a scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 60 micrometers, the vacuum drying temperature is 120 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 180 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 480 ℃ at a heating rate of 5 ℃/min, preserving heat for 5 hours, heating to 610 ℃ at a heating rate of 10 ℃/min, preserving heat for 10 hours, and cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 20min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the surface being provided with the aluminum oxide obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the surface being provided with TiO (OH) 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 1g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electrodeposition treatment is 20V, and the electrodeposition time is 10min; deionized water is adopted in the cleaning process, and the vacuum drying temperature is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 630 ℃, and the time is 40min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
After inspection, this example was madeThe static specific capacity of the prepared aluminum electrolytic capacitor anode foil reaches 1.02 mu F/cm 2 。
Example 14
The embodiment comprises the following steps:
uniformly mixing and stirring spherical aluminum powder, a solvent of glycol, absolute ethyl alcohol, terpineol, a binder of ethyl cellulose and a dispersant of polyethylene glycol according to a mass ratio of 50; the average grain diameter of the spherical aluminum powder is 20 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting a scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 50 micrometers, the vacuum drying temperature is 110 ℃, and the thickness of the aluminum foil after being coated with the slurry and being dried in vacuum is 150 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 460 ℃ at the heating rate of 2 ℃/min, preserving heat for 5h, then heating to 600 ℃ at the heating rate of 5 ℃/min, preserving heat for 12h, and then cooling along with the furnace; the furnace atmosphere in the sintering process is nitrogen;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 15min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 520 ℃, and the time is 10min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as electrolyte, and I in the electrolyte 2 The concentration of the acetone is 0.8g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electrodeposition treatment is 30V, and the electrodeposition time is 8min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 620 ℃, and the time is 50min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts a boric acid solution with the mass concentration of 20%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.92 mu F/cm 2 。
Example 15
The embodiment comprises the following steps:
step one, mixing spherical aluminum powder, spherical 6061 aluminum alloy powder, solvent absolute ethyl alcohol, terpineol, binder polyvinyl alcohol, ethyl cellulose, dispersant triethanolamine and oleic acid according to the weight ratio of 30:20, mixing and stirring uniformly according to the mass ratio of; the average grain diameter of the spherical aluminum powder and the spherical 6061 aluminum alloy powder is 20 mu m, and the mass purity is 99.99 percent;
step two, coating the two sides of the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate symmetrically by adopting a scraper coating, and then carrying out vacuum drying; the thickness of the aluminum foil substrate is 40 micrometers, the vacuum drying temperature is 140 ℃, and the thickness of the aluminum foil after vacuum drying after coating the slurry is 140 micrometers;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil; the sintering process comprises the following steps: heating from room temperature to 500 ℃ at the heating rate of 4 ℃/min and preserving heat for 4h, then heating to 610 ℃ at the heating rate of 10 ℃/min and preserving heat for 10h, and then cooling along with the furnace; the furnace atmosphere in the sintering process is argon;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface; the water boiling treatment is carried out by using deionized water at 100 ℃, and the water boiling time is 10min; the temperature of the vacuum drying is 100 ℃;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface; the temperature of the heat treatment is 500 ℃, and the time is 15min;
step six, performing electrodeposition treatment on the aluminum foil with the aluminum oxide on the surface obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the TiO (OH) on the surface 2 The aluminum foil of (1); the electrodeposition process is carried out at room temperature, titanium foil is used as an anode, aluminum foil with aluminum oxide on the surface is used as a cathode, and I 2 A solution prepared from acetone and deionized water is used as an electrolyte, wherein I in the electrolyte 2 The concentration of the acetone is 0.6g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electro-deposition treatment is 25V, and the electro-deposition time is 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃;
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1); the temperature of the heat treatment is 630 ℃, and the time is 30min;
step eight, the surface obtained in the step seven is provided with TiO 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor; the formation treatment adopts boric acid solution with the mass concentration of 10%, and the formation voltage is 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
Through detection, the static specific capacity of the anode foil of the aluminum electrolytic capacitor prepared by the embodiment reaches 0.89 mu F/cm 2 。
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.

Claims (9)

1. A method for preparing anode foil of an aluminum electrolytic capacitor based on electrodeposition is characterized by comprising the following steps:
step one, mixing and stirring spherical aluminum powder or/and spherical aluminum alloy powder with a solvent, a binder and a dispersant uniformly to obtain slurry;
coating the slurry obtained in the step one on the upper surface and the lower surface of the aluminum foil substrate, and then carrying out vacuum drying;
step three, sintering the aluminum foil subjected to vacuum drying in the step two to obtain a sintered aluminum foil;
step four, carrying out water boiling treatment on the sintered aluminum foil obtained in the step three, and drying in vacuum to obtain an aluminum foil with hydrated alumina on the surface;
step five, carrying out heat treatment on the aluminum foil with hydrated alumina on the surface obtained in the step four to obtain an aluminum foil with alumina on the surface;
step six, performing electrodeposition treatment on the aluminum foil with the surface being provided with the aluminum oxide obtained in the step five, then cleaning and drying in vacuum to obtain the aluminum foil with the surface being provided with TiO (OH) 2 The aluminum foil of (1);
step seven, the surface obtained in the step six is provided with TiO (OH) 2 The aluminum foil is subjected to heat treatment to obtain the aluminum foil with TiO on the surface 2 The aluminum foil of (1);
step eight, forming TiO on the surface obtained in the step seven 2 The aluminum foil is subjected to formation treatment, and then is cleaned and dried in vacuum to obtain the anode foil of the aluminum electrolytic capacitor.
2. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein in the first step, the average particle diameter of the spherical aluminum powder and the average particle diameter of the spherical aluminum alloy powder are both 10 μm to 20 μm, and the mass purity is not lower than 99.95%; the solvent is at least one of absolute ethyl alcohol, glycerol, terpineol and glycol, the binder is at least one of polymethacrylate, polyvinyl alcohol, ethyl cellulose and carboxymethyl cellulose, and the dispersant is at least one of lecithin, oleic acid, polyethylene glycol and triethanolamine.
3. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the thickness of the aluminum foil substrate in the second step is 20 μm to 60 μm, the slurry is symmetrically coated on both sides of the upper surface and the lower surface of the aluminum foil substrate, the vacuum drying temperature is 80 ℃ to 150 ℃, and the thickness of the aluminum foil after the slurry is coated and vacuum dried is 120 μm to 180 μm.
4. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the sintering process in step three is as follows: heating from room temperature to 400-500 ℃ at a heating rate of 2-5 ℃/min, preserving heat for 4-8 h, heating to 600-650 ℃ at a heating rate of 5-10 ℃/min, preserving heat for 6-12h, and cooling along with a furnace; the atmosphere in the furnace in the sintering process is nitrogen, argon or vacuum.
5. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the water boiling treatment in the fourth step is performed with deionized water at 100 ℃ for 10min to 20min; the temperature of the vacuum drying is 100 ℃.
6. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the temperature of the heat treatment in the fifth step is 480 ℃ to 520 ℃ and the time is 5min to 15min.
7. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the electrodeposition treatment in the sixth step is carried out by using a titanium foil as the anode, using an aluminum foil with aluminum oxide on the surface as the cathode, and using I 2 Acetone andusing solution prepared by deionized water as electrolyte, wherein I in the electrolyte 2 The concentration of the acetone is 0.2 g/L-1 g/L, and the mass ratio of the acetone to the deionized water is 100; the voltage of the electrodeposition treatment is from 20V to 35V, and the electrodeposition time is from 5min to 10min; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
8. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition as claimed in claim 1, wherein the temperature of the heat treatment in the seventh step is 600 ℃ to 630 ℃ and the time is 30min to 60min.
9. The method for preparing the anode foil of the aluminum electrolytic capacitor based on the electrodeposition according to claim 1, wherein the formation treatment in the eighth step is performed by using a boric acid solution with a mass concentration of 10-20% and a formation voltage of 520V; deionized water is adopted in the cleaning process, and the temperature of vacuum drying is 100 ℃.
CN202211049355.0A 2022-08-30 2022-08-30 Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition Pending CN115188596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211049355.0A CN115188596A (en) 2022-08-30 2022-08-30 Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211049355.0A CN115188596A (en) 2022-08-30 2022-08-30 Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition

Publications (1)

Publication Number Publication Date
CN115188596A true CN115188596A (en) 2022-10-14

Family

ID=83523317

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211049355.0A Pending CN115188596A (en) 2022-08-30 2022-08-30 Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition

Country Status (1)

Country Link
CN (1) CN115188596A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117524736A (en) * 2024-01-08 2024-02-06 西安稀有金属材料研究院有限公司 Method for producing electrode
CN117594358A (en) * 2024-01-17 2024-02-23 西安稀有金属材料研究院有限公司 Preparation method of anode foil based on aqueous slurry and aluminum electrolytic capacitor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117524736A (en) * 2024-01-08 2024-02-06 西安稀有金属材料研究院有限公司 Method for producing electrode
CN117524736B (en) * 2024-01-08 2024-04-05 西安稀有金属材料研究院有限公司 Method for producing electrode
CN117594358A (en) * 2024-01-17 2024-02-23 西安稀有金属材料研究院有限公司 Preparation method of anode foil based on aqueous slurry and aluminum electrolytic capacitor

Similar Documents

Publication Publication Date Title
CN115188596A (en) Method for preparing aluminum electrolytic capacitor anode foil based on electrodeposition
CN115172060A (en) Method for preparing aluminum electrolytic capacitor anode foil based on electrophoretic deposition
CN111463016B (en) Preparation method of porous anode aluminum foil for electrolytic capacitor
EP3089181B1 (en) Electrode foil for aluminum electrolytic capacitor and production method for same
CN113458143B (en) Method for preparing aluminum electrolytic capacitor anode foil by using cold rolling mill
CN113593911A (en) Preparation method of sintered anode material with high specific surface area and high specific volume
KR20150036806A (en) Electrode material for aluminum electrolytic capacitor and method for manufacturing the material
KR20070084572A (en) Capacitors having a high energy density
WO2011070915A1 (en) Electrode material for aluminum electrolytic capacitor and production method therefor
CN115188597A (en) Preparation method of sintered anode material based on multi-particle size matching
CN114512345A (en) High specific volume porous electrode foil and preparation method thereof
CN113634753B (en) Low-cost low-pollution aluminum electrolytic capacitor anode foil and preparation method thereof
CN109036852B (en) Three-dimensional porous aluminum electrode foil and preparation method thereof
CN113161150A (en) Preparation method of anode foil composite film of aluminum electrolytic capacitor
WO2024027122A1 (en) Preparation method for high-dielectric composite powder sintered foil
CN113643900A (en) Material containing giant dielectric powder for aluminum electrolytic capacitor and preparation method thereof
CN115106534B (en) Preparation method of sintered anode foil with uniformly dispersed multiple powders
WO2013118818A1 (en) Method for manufacturing electrode material for aluminum electrolytic capacitor
CN111364016A (en) Method for preparing porous anode aluminum foil by aid of ALD (atomic layer deposition) assisted nitrogen-doped micro-nano aluminum powder
CN114843108B (en) Electrode foil and preparation method and application thereof
CN115116752B (en) Electrode foil with composite oxide film, preparation method thereof and aluminum electrolytic capacitor
CN115188598A (en) Aluminum electrolytic capacitor sintered foil coated with nano dielectric powder and preparation method thereof
CN107731530A (en) A kind of electric aluminum foil complex media production technology
CN109741950B (en) Preparation method of porous aluminum anode material
CN109848405B (en) Powder surface treating agent, titanium or titanium alloy powder surface treating method and composite powder

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination