CN112908709B - Working electrolyte with high ripple current resistance for capacitor - Google Patents
Working electrolyte with high ripple current resistance for capacitor Download PDFInfo
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- CN112908709B CN112908709B CN202110158211.8A CN202110158211A CN112908709B CN 112908709 B CN112908709 B CN 112908709B CN 202110158211 A CN202110158211 A CN 202110158211A CN 112908709 B CN112908709 B CN 112908709B
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- 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
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
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- 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
- H01G9/145—Liquid electrolytic capacitors
Abstract
The invention relates to the field of capacitors, and provides a working electrolyte with high ripple current resistance for a capacitor, which is used for improving the ripple current resistance of an electrolytic capacitor. The invention provides a working electrolyte with high ripple current resistance for a capacitor, which comprises: 50-80 parts of main solvent, 2-20 parts of auxiliary solvent, 1-8 parts of main solute, 0.5-5 parts of auxiliary solute, 1-15 parts of flash fire voltage improver, 0.3-8 parts of hydrogen absorbent, 0.05-5 parts of formation improver, 0.5-6 parts of hydration-proof additive and 0.05-5 parts of retardant. The sparking voltage of the capacitor is obviously improved, and the voltage resistance of the electrolytic capacitor is improved, so that the voltage resistance of the electrolytic capacitor is improved, and the ripple current resistance of the electrolytic capacitor is improved.
Description
Technical Field
The invention relates to the field of capacitors, in particular to a working electrolyte with high ripple current resistance for a capacitor.
Background
Capacitors play an important role in circuits such as tuning, bypassing, coupling, filtering, etc. However, the requirement of the capacitor on performance is very high, the quality of working electrolyte determines the performance of the capacitor, such as stability, service life and electric leakage, the performance directly determines the quality of the capacitor, and the electrolyte belongs to the core technology of electrolytic capacitance.
There is a lack of miniaturized high ripple tolerant capacitors on the market today.
Disclosure of Invention
The technical problem solved by the invention is to improve the ripple current resistance of the electrolytic capacitor and provide the working electrolyte with high ripple current resistance for the capacitor.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a working electrolyte resistant to high ripple current values for capacitors, comprising:
50-80 parts of main solvent, 2-20 parts of auxiliary solvent, 1-8 parts of main solute, 0.5-5 parts of auxiliary solute, 1-15 parts of flash voltage improver, 0.3-8 parts of hydrogen absorbent, 0.05-5 parts of formation improver, 0.5-6 parts of hydration-proof additive and 0.05-5 parts of stopping agent.
Different proportions are adopted, and a sparking voltage improver is added, so that the sparking voltage of the capacitor can be effectively improved.
The sparking voltage of the capacitor is obviously improved, and the voltage resistance of the electrolytic capacitor is improved, so that the voltage resistance of the electrolytic capacitor is improved, and the ripple current resistance of the electrolytic capacitor is improved.
Preferably, 70-80 parts by mass of a main solvent, 10-20 parts by mass of an auxiliary solvent, 6-8 parts by mass of a main solute, 2-5 parts by mass of an auxiliary solute, 5-15 parts by mass of a flash voltage improver, 2-8 parts by mass of a hydrogen absorbent, 2-5 parts by mass of a formation improver, 2-6 parts by mass of a waterproof additive and 1-5 parts by mass of a retardant.
Preferably, 70 parts by mass of a main solvent, 10 parts by mass of an auxiliary solvent, 6 parts by mass of a main solute, 2 parts by mass of an auxiliary solute, 5 parts by mass of a flash voltage improver, 2 parts by mass of a hydrogen absorbing agent, 2 parts by mass of a formation improver, 2 parts by mass of a water-resistant additive and 1 part by mass of a retardant.
Preferably, the primary solvent is ethylene glycol; the auxiliary solvent is glycerol; the main solute is 2-butyl suberic acid, the auxiliary solute is sebacic acid, the auxiliary solvent is diethylene glycol, the hydrogen absorption agent is p-nitrotoluene alcohol, the hydration-resistant additive is mannitol, the formation promoting agent is monobutyl phosphate, and the stopping agent is lignosulfonate.
Preferably, the flash fire promoting agent is a modified silica sol.
Preferably, the preparation method of the modified silica sol comprises the following steps:
taking 0.5-1 part by mass of polyvinyl alcohol, 0.5-1 part by mass of polyethylene glycol, 1-5 parts by mass of ethyl orthosilicate, 0.02-0.04 part by mass of nitric acid, 0.05-0.1 part by mass of glutaraldehyde, 10-15 parts by mass of olive oil and 10-12 parts by mass of ultrapure water;
dissolving polyvinyl alcohol into ultrapure water, adding ethyl orthosilicate and nitric acid at room temperature, fully stirring, and continuing stirring at 70-80 ℃ for 48 hours to obtain a first solution;
adding the first solution into olive oil, performing ultrasonic treatment for 30min, adding glutaraldehyde, stirring for 24h, adding polyethylene glycol, fully stirring, drying, washing with acetone and water for 2-3 times, and drying to obtain modified nano silicon dioxide;
dispersing the modified nano-silica into the silica sol to obtain the modified silica sol.
Preferably, the preparation method of the silica sol comprises the following steps:
taking 17-20 parts by mass of ultrapure water, 1-4 parts by mass of N, N-dimethylformamide, 1-4 parts by mass of isopropanol and 5-7 parts by mass of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are uniformly mixed, tetraethoxysilane is added, and the mixture is stirred for 1 to 2 hours at the speed of 600 to 800r/min, so that silica sol is obtained.
Preferably, 0.6 to 1 part by mass of polyvinyl alcohol, 0.6 to 1 part by mass of polyethylene glycol, 3 to 5 parts by mass of ethyl orthosilicate, 0.03 to 0.04 part by mass of nitric acid, 0.06 to 0.1 part by mass of glutaraldehyde, 12 to 15 parts by mass of olive oil and 11 to 12 parts by mass of ultrapure water are taken.
Preferably, 0.6 part by mass of polyvinyl alcohol, 0.6 part by mass of polyethylene glycol, 3 parts by mass of ethyl orthosilicate, 0.03 part by mass of nitric acid, 0.06 part by mass of glutaraldehyde, 12 parts by mass of olive oil, and 11 parts by mass of ultrapure water are taken.
Preferably, the preparation method comprises:
the main solvent and the auxiliary solvent are uniformly mixed,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
cooling to 70-90 deg.c, adding flash voltage promoter, hydrogen absorbing agent, formation promoter, water-proofing additive and inhibitor.
Compared with the prior art, the invention has the beneficial effects that: the sparking voltage of the capacitor is obviously improved, and the voltage resistance of the electrolytic capacitor is improved, so that the voltage resistance of the electrolytic capacitor is improved, and the ripple current resistance of the electrolytic capacitor is improved.
Based on a large number of experiments, the inventor finds that the traditional silica sol, polyvinyl alcohol, polyethylene glycol and the like are used together or singly, so that the sparking voltage of the electrolyte is difficult to further increase.
Occasionally, the inventors have found that the sparking voltage of the capacitor can be further increased by modifying the nanosilica and then adding it to the silica sol.
Detailed Description
The following examples are further illustrative of the present invention and are not intended to be limiting thereof.
Example 1
A working electrolyte resistant to high ripple current values for capacitors, comprising:
70g of ethylene glycol, 10g of glycerol, 6g of 2-butyl suberic acid, 2g of sebacic acid, 5g of a flash voltage improver, 2g of p-nitrotoluene alcohol, 2g of monobutyl phosphate, 2g of mannitol and 1g of lignosulfonate. The flash fire promoting agent is modified silica sol.
The preparation method of the modified silica sol comprises the following steps:
0.6g of polyvinyl alcohol, 0.6g of polyethylene glycol, 3g of ethyl orthosilicate, 0.03g of nitric acid, 0.06g of glutaraldehyde, 12g of olive oil and 11g of ultrapure water are taken. (ii) a
Dissolving polyvinyl alcohol into ultrapure water, adding ethyl orthosilicate and nitric acid at room temperature, fully stirring, and continuing stirring at 70-80 ℃ for 48 hours to obtain a first solution;
adding the first solution into olive oil, performing ultrasonic treatment for 30min, adding glutaraldehyde, stirring for 24h, adding polyethylene glycol, fully stirring, drying, washing with acetone and water for 2-3 times, and drying to obtain modified nano silicon dioxide;
dispersing the modified nano-silica into the silica sol to obtain the modified silica sol.
The preparation method of the silica sol comprises the following steps:
taking 18g of ultrapure water, 2g of N, N-dimethylformamide, 2g of isopropanol and 6g of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are uniformly mixed, tetraethoxysilane is added, and the mixture is stirred for 1 to 2 hours at the speed of 600 to 800r/min, so that silica sol is obtained.
The preparation method comprises the following steps:
the main solvent and the auxiliary solvent are mixed evenly,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
when the temperature is cooled to 70-90 ℃, a flash voltage improver, a hydrogen absorbing agent, a formation improver, a waterproof additive and a stopping agent are added.
Different proportions are adopted, and a sparking voltage improver is added, so that the sparking voltage of the capacitor can be effectively improved.
The sparking voltage of the capacitor is obviously improved, the voltage resistance of the electrolytic capacitor is improved, and the electrolyte spark voltage is improved, so that the voltage resistance of the electrolytic capacitor is improved, and the ripple current resistance of the electrolytic capacitor is improved.
Example 2
A working electrolyte resistant to high ripple current values for capacitors, comprising:
70g of ethylene glycol, 10g of glycerol, 6g of 2-butyl suberic acid, 2g of sebacic acid, 5g of a flash voltage improver, 2g of p-nitrotoluene alcohol, 2g of monobutyl phosphate, 2g of mannitol and 1g of lignosulfonate. The flash fire promoting agent is modified silica sol.
The preparation method of the modified silica sol comprises the following steps:
0.6g of polyvinyl alcohol, 3g of tetraethoxysilane, 0.03g of nitric acid, 0.06g of glutaraldehyde, 12g of olive oil and 11.6g of ultrapure water are taken. (ii) a
Dissolving polyvinyl alcohol into ultrapure water, adding ethyl orthosilicate and nitric acid at room temperature, fully stirring, and continuing stirring at 70-80 ℃ for 48 hours to obtain a first solution;
adding the first solution into olive oil, performing ultrasonic treatment for 30min, adding glutaraldehyde, stirring for 24h, fully stirring, drying, washing with acetone and water for 2-3 times, and drying to obtain modified nano-silicon dioxide;
dispersing the modified nano-silica into the silica sol to obtain the modified silica sol.
The preparation method of the silica sol comprises the following steps:
taking 18g of ultrapure water, 2g of N, N-dimethylformamide, 2g of isopropanol and 6g of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are mixed evenly, tetraethoxysilane is added and stirred for 1-2 hours at 600-800 r/min, thus obtaining the silica sol.
The preparation method comprises the following steps:
the main solvent and the auxiliary solvent are mixed evenly,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
cooling to 70-90 deg.c, adding flash voltage promoter, hydrogen absorbing agent, formation promoter, water-proofing additive and inhibitor.
Example 3
A working electrolyte resistant to high ripple current values for capacitors, comprising:
70g of ethylene glycol, 10g of glycerol, 6g of 2-butyl suberic acid, 2g of sebacic acid, 5g of a flash voltage improver, 2g of p-nitrotoluene alcohol, 2g of monobutyl phosphate, 2g of mannitol and 1g of lignosulfonate. The flash fire promoting agent is silica sol.
The preparation method of the silica sol comprises the following steps:
taking 18g of ultrapure water, 2g of N, N-dimethylformamide, 2g of isopropanol and 6g of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are uniformly mixed, tetraethoxysilane is added, and the mixture is stirred for 1 to 2 hours at the speed of 600 to 800r/min, so that silica sol is obtained.
The preparation method comprises the following steps:
the main solvent and the auxiliary solvent are uniformly mixed,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
cooling to 70-90 deg.c, adding flash voltage promoter, hydrogen absorbing agent, formation promoter, water-proofing additive and inhibitor.
Example 4
A working electrolyte with high ripple current resistance for capacitors comprises:
70g of ethylene glycol, 10g of glycerol, 6g of 2-butyl suberic acid, 2g of sebacic acid, 5g of flash voltage improver, 2g of p-nitrotoluol, 2g of monobutyl phosphate, 2g of mannitol and 1g of lignosulfonate. The flash fire promoting agent comprises 3.8g of modified silica sol, 0.6g of polyethylene glycol and 0.6g of polyvinyl alcohol.
The preparation method of the silica sol comprises the following steps:
taking 18g of ultrapure water, 2g of N, N-dimethylformamide, 2g of isopropanol and 6g of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are uniformly mixed, tetraethoxysilane is added, and the mixture is stirred for 1 to 2 hours at the speed of 600 to 800r/min, so that silica sol is obtained.
The preparation method comprises the following steps:
the main solvent and the auxiliary solvent are uniformly mixed,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
cooling to 70-90 deg.c, adding flash voltage promoter, hydrogen absorbing agent, formation promoter, water-proofing additive and inhibitor.
Comparative example 1
A working electrolyte resistant to high ripple current values for capacitors, comprising:
70g of ethylene glycol, 10g of glycerol, 6g of 2-butyl suberic acid, 2g of sebacic acid, 2g of p-nitrotoluene alcohol, 2g of monobutyl phosphate, 2g of mannitol and 1g of lignosulfonate.
Examples of the experiments
The electrolytes of examples 1 to 4 and comparative example were used to fabricate a small-sized aluminum electrolytic capacitor.
The sparking voltage of the capacitors produced in the examples is shown in the following table.
| Sparking voltage | |
| Example 1 | 851V |
| Example 2 | 706V |
| Example 3 | 677V |
| Example 4 | 724V |
| Comparative example 1 | 496V |
As can be seen from the above table, the modified nano-silica is added to the silica sol in example 1, and the nano-silica is loaded with the polyethylene glycol and the polyvinyl alcohol, so that the sparking voltage is significantly increased, and the ripple current resistance of the capacitor is further improved to a certain extent.
In the embodiment 2, the nano-silica loaded polyethylene glycol is not adopted, and the nano-silica loaded polyvinyl alcohol is only adopted, so that the sparking voltage is low; in example 3, only silica sol is used, and the sparking voltage is also low, which shows that the sparking voltage can be further improved only by dispersing polyethylene glycol and polyvinyl alcohol modified nano-silica into the silica sol.
Example 4 also shows that the effect of silica sol, polyethylene glycol and polyvinyl alcohol is weaker than that of example 1, and the combination or single use of the traditional silica sol or polyethylene glycol is difficult to further increase the flash fire voltage.
The electrolyte of comparative example 1 was not charged with the sparking voltage booster and the sparking voltage was lower.
The above detailed description is specific to possible embodiments of the present invention, and the above embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included in the present claims.
Claims (7)
1. The utility model provides a working electrolyte of resistant high ripple current value for condenser which characterized in that includes:
50-80 parts of main solvent, 2-20 parts of auxiliary solvent, 1-8 parts of main solute, 0.5-5 parts of auxiliary solute, 1-15 parts of flash voltage improver, 0.3-8 parts of hydrogen absorbent, 0.05-5 parts of formation improver, 0.5-6 parts of hydration-proof additive and 0.05-5 parts of stopping agent;
the sparking voltage improver is modified silica sol;
the preparation method of the modified silica sol comprises the following steps:
taking 0.5-1 part by mass of polyvinyl alcohol, 0.5-1 part by mass of polyethylene glycol, 1-5 parts by mass of ethyl orthosilicate, 0.02-0.04 part by mass of nitric acid, 0.05-0.1 part by mass of glutaraldehyde, 10-15 parts by mass of olive oil and 10-12 parts by mass of ultrapure water;
dissolving polyvinyl alcohol into ultrapure water, adding ethyl orthosilicate and nitric acid at room temperature, fully stirring, and continuing stirring at 70-80 ℃ for 48 hours to obtain a first solution;
adding the first solution into olive oil, performing ultrasonic treatment for 30min, adding glutaraldehyde, stirring for 24h, adding polyethylene glycol, fully stirring, drying, washing with acetone and water for 2-3 times, and drying to obtain modified nano silicon dioxide;
dispersing the modified nano-silica into silica sol to obtain modified silica sol;
the preparation method of the silica sol comprises the following steps:
taking 17-20 parts by mass of ultrapure water, 1-4 parts by mass of N, N-dimethylformamide, 1-4 parts by mass of isopropanol and 5-7 parts by mass of tetraethoxysilane;
after ultrapure water, N-dimethylformamide and isopropanol are uniformly mixed, tetraethoxysilane is added, and the mixture is stirred for 1 to 2 hours at the speed of 600 to 800r/min, so that silica sol is obtained.
2. The working electrolyte with high ripple current resistance for capacitors as claimed in claim 1, wherein the working electrolyte comprises 70 to 80 parts by mass of a main solvent, 10 to 20 parts by mass of an auxiliary solvent, 6 to 8 parts by mass of a main solute, 2 to 5 parts by mass of an auxiliary solute, 5 to 15 parts by mass of a spark voltage raising agent, 2 to 8 parts by mass of a hydrogen absorbing agent, 2 to 5 parts by mass of a formation raising agent, 2 to 6 parts by mass of a hydration preventing additive, and 1 to 5 parts by mass of a stopping agent.
3. The working electrolyte solution with high ripple current resistance for capacitors according to claim 1, wherein the working electrolyte solution comprises 70 parts by mass of a main solvent, 10 parts by mass of an auxiliary solvent, 6 parts by mass of a main solute, 2 parts by mass of an auxiliary solute, 5 parts by mass of a sparking voltage raising agent, 2 parts by mass of a hydrogen absorbing agent, 2 parts by mass of a formation raising agent, 2 parts by mass of a hydration preventing additive, and 1 part by mass of a stopping agent.
4. The working electrolyte with high ripple current resistance for capacitors according to claim 2, wherein the main solvent is ethylene glycol; the auxiliary solvent is glycerol; the main solute is 2-butyl suberic acid, the auxiliary solute is sebacic acid, the auxiliary solvent is diethylene glycol, the hydrogen absorption agent is p-nitrotoluene alcohol, the hydration-resistant additive is mannitol, the formation promoting agent is monobutyl phosphate, and the stopping agent is lignosulfonate.
5. The working electrolyte solution with high ripple current resistance for capacitors as claimed in claim 1, wherein the working electrolyte solution comprises 0.6 to 1 part by mass of polyvinyl alcohol, 0.6 to 1 part by mass of polyethylene glycol, 3 to 5 parts by mass of ethyl orthosilicate, 0.03 to 0.04 part by mass of nitric acid, 0.06 to 0.1 part by mass of glutaraldehyde, 12 to 15 parts by mass of olive oil, and 11 to 12 parts by mass of ultrapure water.
6. The working electrolyte solution with high ripple current resistance for capacitors as claimed in claim 5, wherein the working electrolyte solution comprises 0.6 parts by mass of polyvinyl alcohol, 0.6 parts by mass of polyethylene glycol, 3 parts by mass of ethyl orthosilicate, 0.03 parts by mass of nitric acid, 0.06 parts by mass of glutaraldehyde, 12 parts by mass of olive oil, and 11 parts by mass of ultrapure water.
7. The working electrolyte with high ripple current resistance for capacitors according to claim 1, wherein the preparation method comprises:
the main solvent and the auxiliary solvent are mixed evenly,
adding main solute and auxiliary solute under the condition of 100-115 ℃, stirring and heating to 130-135 ℃, keeping the temperature and stirring for reaction for 10-40 min,
when the temperature is cooled to 70-90 ℃, a flash voltage improver, a hydrogen absorbing agent, a formation improver, a waterproof additive and a stopping agent are added.
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| CN102643072A (en) * | 2012-04-27 | 2012-08-22 | 江门市安诺特炊具制造有限公司 | Nanometer inorganic non-sticking water-based paint and preparation method thereof |
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| CN102418548A (en) * | 2011-09-28 | 2012-04-18 | 韩林华 | Mortar suspending agent capable of preventing spontaneous combustion of coal dust |
| CN104087086B (en) * | 2014-06-16 | 2016-03-02 | 华南理工大学 | Hydrophilic aluminium foil of a kind of organic inorganic hybridized paint and its preparation method and application |
| CN108257786B (en) * | 2016-12-29 | 2019-09-10 | 深圳新宙邦科技股份有限公司 | A kind of resistance to big ripple electrolyte for capacitor of contracting body |
| CN106811179B (en) * | 2017-01-03 | 2019-11-08 | 温州大学 | The preparation method of polyethylene glycol/silicon dioxide composite phase-change energy storage material |
| CN109326447A (en) * | 2018-11-07 | 2019-02-12 | 广州金立电子有限公司 | A kind of electrolytic capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102616766A (en) * | 2012-01-19 | 2012-08-01 | 中国科学院山西煤炭化学研究所 | Preparation method for heteratom-containing ordered mesoporous carbon with high specific capacitance |
| CN102643072A (en) * | 2012-04-27 | 2012-08-22 | 江门市安诺特炊具制造有限公司 | Nanometer inorganic non-sticking water-based paint and preparation method thereof |
| CN108484055A (en) * | 2018-05-30 | 2018-09-04 | 周晓东 | A kind of cement-based waterproof thermal insulation board |
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