CN108538590A - A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof - Google Patents
A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN108538590A CN108538590A CN201810310031.5A CN201810310031A CN108538590A CN 108538590 A CN108538590 A CN 108538590A CN 201810310031 A CN201810310031 A CN 201810310031A CN 108538590 A CN108538590 A CN 108538590A
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- electrolytic capacitor
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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
Abstract
Present invention is disclosed each components of a kind of electrolyte for aluminum electrolytic capacitor, including following weight percentage：Solute：15% ~ 20%, aoxidize membrane stabilizer：0.1% ~ 5%, flash over voltage elevator 1% ~ 10% inhales hydrogen agent 0.1% ~ 3%, surfactant：0.5% ~ 3%, fire retardant：5% ~ 10%, surplus is solvent.It is nonflammable after so that aluminium electrolutic capacitor is struck sparks by being added into fire retardant thickness in the electrolyte；In addition, by adding suitable flash over voltage enhancer in the electrolytic solution, oxidation membrane stabilizer, inhaling hydrogen agent, the flash over voltage of electrolyte is improved, and make the good characterisitic parameter of aluminium electrolutic capacitor stable for extended periods of time.
Description
Technical field
The present invention relates to a kind of electrolyte and preparation method thereof more particularly to a kind of electrolyte for aluminum electrolytic capacitor and its
Preparation method belongs to capacitor technology field.
Background technology
Aluminium electrolutic capacitor has the characteristics that function admirable, large capacity, cheap, easy to process, easy to use, therefore
It is widely used in the electronic system products such as information electronic device, instrument, electromechanics, household electrical appliances.As input filter in this kind of complete machine
Alminium electrolytic condenser is a kind of critical electronic element, is usually applied in combination with connection in series-parallel, thus to safety, reliability requirement
It is very high.
However, being commonly used as aluminium electricity since organic acid electrolyte is because oxidation efficiency is high and high-temperature stability is good at present
The Working electrolyte of electrolysis condenser.But this kind of electrolyte is of virtually strong flammability, it is easy to be ignited and one
It is ignited fiercely to burn incessantly.Especially in the electrolyte of high-pressure work, not only organic acid containing more amount etc. is inflammable
Product, and water content is severely limited, therefore aluminium electrolutic capacitor high-voltage working electrolyte is under conditions of comprehensive performance meets
More easy firing.
Aluminium electrolutic capacitor mostly uses greatly inflammable organic acid electrolyte and brings combustible problem.Wherein, high pressure
Large-scale aluminum electrolysis capacitor is because the electrolyte content that the electrostatic energy assembled when work is very high and possesses is also very much, so bring
The safety problems such as inflammable and explosive of bigger.Because the complete machine fire incident that aluminium electrolutic capacitor causes has accounted for very important ratio
Example.
In conclusion how a kind of electrolyte for aluminum electrolytic capacitor is provided, it is not only comprehensive under high-temperature and high-pressure conditions
Can be excellent and nonflammable, just become those skilled in the art's urgent problem to be solved.
Invention content
The purpose of the present invention is exactly to provide a kind of aluminium electrolutic capacitor to solve the above-mentioned problems in the prior art
With electrolyte, the electrolyte not only high temperature high voltage resistant, but also it is nonflammable.
Technical solution of the invention is：
A kind of electrolyte for aluminum electrolytic capacitor includes each component of following weight percentage：Solute：15%~
20%, aoxidize membrane stabilizer：0.1%~5%, flash over voltage elevator 1%~10% inhales hydrogen agent 0.1%~3%, and surface is lived
Property agent：0.5%~3%, fire retardant：5%~10%, surplus is solvent.
Preferably, the solute is boric acid, ammonium pentaborate, ammonium azelate, azelaic acid hydrogen ammonium, ammonium sebacate isosebacic acid
The mixing of one or more of ammonium, branched Long carbon chain ammonium carboxylate salt, azelaic acid hydrogen ammonia.
Preferably, the oxidation membrane stabilizer is one kind in phosphorous acid, ammonium phosphite, ortho phosphorous acid, ammonium hypophosphite
Or two or more mixing.
Preferably, the flash over voltage elevator be modified polyvinylalcohol or one kind in nano silicon dioxide dispersant or
Two or more mixing.
Preferably, the suction hydrogen agent be nitrophenol, p nitrobenzyl alcohol, 3-nitroacetophenone, ortho-nitroanisole,
The mixing of one or more of dinitrobenzene or paranitrobenzoic acid ammonium.
Preferably, the surfactant is the mixed solution obtained after ammonium benzoate is reacted with polyethylene glycol 400.
Preferably, the fire retardant is any one in alkyl phosphate, triethyl phosphate, tributyl phosphate.
Preferably, for the solvent including being main solvent and secondary solvent, it is 50%~60% that main solvent, which is weight percentage,
Ethylene glycol and 20%~30% two kinds of diethylene glycol (DEG) mixed solution.
A kind of preparation method of electrolyte for aluminum electrolytic capacitor, includes the following steps：
S1：Weight percent is sufficiently mixed for 50%~60% ethylene glycol and 20%~30% diethylene glycol (DEG), and is added
Heat stirs while being added to flash over voltage elevator is added at 70 DEG C~80 DEG C, until completely dissolved, continues addition 15%
~20% solute is simultaneously continuously heating to 120 DEG C~130 DEG C, stirs until being completely dissolved；
S2：Mixed liquor in S1 is continued to be warming up to 135 DEG C~150 DEG C, then weight percent is 0.1%~5% oxygen
Change membrane stabilizer, 0.1%~3% suction hydrogen agent and 0.5%~3% surfactant to be added, be stirred continuously until completely molten
Solution；
S3：Mixed liquor in step S2 is cooled to 80 DEG C~85 DEG C, be added weight percent be 5%~10% it is fire-retardant
Agent, and naturally cool to room temperature.
The present invention provides a kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof, and advantage is mainly reflected in following
Two aspects：
(1) nonflammable；It is nonflammable after so that aluminium electrolutic capacitor is struck sparks by being added into fire retardant in the electrolytic solution.
(2) performance improves；By adding suitable flash over voltage enhancer in the electrolytic solution, oxidation membrane stabilizer, inhaling hydrogen
Agent, improves the flash over voltage of electrolyte, and makes the good characterisitic parameter of aluminium electrolutic capacitor stable for extended periods of time.
Just the embodiment of the present invention is described in further detail below, so that technical solution of the present invention is easier to manage
Solution is grasped.
Specific implementation mode
A kind of electrolyte for aluminum electrolytic capacitor includes each component of following weight percentage：Solute：15%~
20%, aoxidize membrane stabilizer：0.1%~5%, flash over voltage elevator 1%~10% inhales hydrogen agent 0.1%~3%, and surface is lived
Property agent：0.5%~3%, fire retardant：5%~10%, surplus is solvent.
Wherein, the solute be boric acid, ammonium pentaborate, ammonium azelate, azelaic acid hydrogen ammonium, ammonium sebacate isosebacic acid ammonium,
The mixing of one or more of branched Long carbon chain ammonium carboxylate salt, azelaic acid hydrogen ammonia.
Further, the oxidation membrane stabilizer is one in phosphorous acid, ammonium phosphite, ortho phosphorous acid, ammonium hypophosphite
Kind or two or more mixing.
Further, the flash over voltage elevator is one in modified polyvinylalcohol or nano silicon dioxide dispersant
Kind or two or more mixing.
Preferably, the suction hydrogen agent be nitrophenol, p nitrobenzyl alcohol, 3-nitroacetophenone, ortho-nitroanisole,
The mixing of one or more of dinitrobenzene or paranitrobenzoic acid ammonium.
In the present embodiment, the mixing that the surfactant obtains after being reacted with polyethylene glycol 400 for ammonium benzoate is molten
Liquid.
In the inventive solutions, the fire retardant is in alkyl phosphate, triethyl phosphate, tributyl phosphate
Any one.
In addition, the solvent includes being main solvent and secondary solvent, it is 50%~60% that main solvent, which is weight percentage,
Ethylene glycol and 20%~30% two kinds of diethylene glycol (DEG) mixed solution.
Present invention further teaches a kind of preparation methods of electrolyte for aluminum electrolytic capacitor, include the following steps：
S1：Weight percent is sufficiently mixed for 50%~60% ethylene glycol and 20%~30% diethylene glycol (DEG), and is added
Heat stirs while being added to flash over voltage elevator is added at 70 DEG C~80 DEG C, until completely dissolved, continues addition 15%
~20% solute is simultaneously continuously heating to 120 DEG C~130 DEG C, stirs until being completely dissolved；
S2：Mixed liquor in S1 is continued to be warming up to 135 DEG C~150 DEG C, then weight percent is 0.1%~5% oxygen
Change membrane stabilizer, 0.1%~3% suction hydrogen agent and 0.5%~3% surfactant to be added, be stirred continuously until completely molten
Solution；
S3：Mixed liquor in step S2 is cooled to 80 DEG C~85 DEG C, be added weight percent be 5%~10% it is fire-retardant
Agent, and naturally cool to room temperature.
In the inventive solutions, five realities are obtained according to the preparation method of above-mentioned electrolyte for aluminum electrolytic capacitor
Example is applied, specially：
Embodiment 1：A kind of electrolyte for aluminum electrolytic capacitor, including weight percent are 15% boric acid, 0.3% Asia
Phosphoric acid, 0.2% nitrophenol, 2.5% ammonium benzoate and polyethylene glycol 400 mixed liquor, 5% alkyl phosphate, 55%
Ethylene glycol and 22% diethylene glycol (DEG).
Embodiment 2：A kind of electrolyte for aluminum electrolytic capacitor, including weight percent are 15% boric acid, 0.3% Asia
Phosphoric acid, 2% modified polyvinylalcohol, 0.2% nitrophenol, 2.5% ammonium benzoate and polyethylene glycol 400 mixed liquor, 5%
Alkyl phosphate, 55% ethylene glycol and 20% diethylene glycol (DEG).
Embodiment 3：A kind of electrolyte for aluminum electrolytic capacitor, including weight percent are 15% boric acid, 0.3% Asia
Phosphoric acid, 1% modified polyvinylalcohol, 0.2% nitrophenol, 1% ammonium benzoate and polyethylene glycol 400 mixed liquor, 7.5%
Alkyl phosphate, 55% ethylene glycol and 20% diethylene glycol (DEG).
Embodiment 4：A kind of electrolyte for aluminum electrolytic capacitor, including weight percent are 17% boric acid, 0.3% Asia
Phosphoric acid, 2% modified polyvinylalcohol, 0.2% nitrophenol, 0.5% ammonium benzoate and polyethylene glycol 400 mixed liquor,
10% alkyl phosphate, 50% ethylene glycol and 20% diethylene glycol (DEG).
Embodiment 5：A kind of electrolyte for aluminum electrolytic capacitor, including weight percent be 20% ammonium pentaborate, 0.8%
Ammonium hypophosphite, 1.2% nano silicon dioxide dispersant, 0.5% p nitrobenzyl alcohol, 0.5% ammonium benzoate with
Polyethylene glycol 400 mixed liquor, 7% triethyl phosphate, 50% ethylene glycol and 20% diethylene glycol (DEG).
Above-described embodiment 1 and embodiment 2 conductivity and the measurement of flash over voltage are subjected to, as shown in table 1：
Table 1：Embodiment 1 is compared with conductivity in embodiment 2 and flash over voltage
| Embodiment | Conductivity (mS/cm) | Flash over voltage (V) |
| Embodiment 1 | 1.53 | 457 |
| Embodiment 2 | 1.5 | 482 |
As can be seen from Table 1, constant in Solute mass, modified polyvinylalcohol is added, conductivity declines 0.03mS/
Cm, and flash over voltage promotes 25V.
Above example 2, embodiment 3, embodiment 4 flame retardancy test is subjected to, the test method used includes such as
Lower step：
1. using 3 same fuses (a diameter of 12mm), and above-mentioned 3 same fuses are fully contained respectively and are immersed in reality
It applies in the electrolyte for aluminum electrolytic capacitor in example 2, embodiment 3, embodiment 4, and adsorbs the extra electrolyte in fuse surface layer.
2. the lead of fuse is fixed on the geometrical clamp of supporting rack, the flame of alcolhol burner is then placed in fuse off-chip
The place of 15cm keeps 10s, and records total ember time t of ember time t1 and 3 tested fuses.
3. after ember stopping, combustion testing 10s is repeated, alcolhol burner is withdrawn to the place of the sub- 15cm of off-chip, and is recorded
Ember time t2, while recording whether fuse has drippage that can ignite the particle being burning of cotton.
Test result is as shown in table 2：
Table 2：Embodiment 2, embodiment 3, the anti-flammability of embodiment 4 compare
In the present invention, the formula of electrolyte for aluminum electrolytic capacitor in embodiment 5 is applied into above-mentioned preparation method, including
Following steps：
S1：Weight percent is sufficiently mixed for 50% ethylene glycol and 20% diethylene glycol (DEG), and is heated to 70 DEG C~80
DEG C when be added weight percent be 1.2% nano silicon dioxide dispersant, stirred while being added, until completely dissolved,
Continue to add the ammonium pentaborate that weight percent is 20% and be continuously heating to 120 DEG C~130 DEG C, stirring until be completely dissolved for
Only；
S2：Mixed liquor in S1 is continued to be warming up to 135 DEG C~150 DEG C, then the secondary phosphorous for being 0.8% weight percent
Sour ammonium, 0.5% p nitrobenzyl alcohol, 0.5% ammonium benzoate and polyethylene glycol 400 mixed liquor are added, be stirred continuously until
It is completely dissolved；
S3：Mixed liquor in step S2 is cooled to 80 DEG C~85 DEG C, the triethyl phosphate that weight percent is 7% is added
Fire retardant, and naturally cool to room temperature.
A kind of electrolyte for aluminum electrolytic capacitor provided by the invention and preparation method thereof, by being added into fire retardant thickness,
It is nonflammable after so that aluminium electrolutic capacitor is struck sparks；In addition, by adding suitable flash over voltage enhancer, oxidation in the electrolytic solution
Membrane stabilizer inhales hydrogen agent, improves the flash over voltage of electrolyte, and make the good characteristic of aluminium electrolutic capacitor stable for extended periods of time
Parameter.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and this
Field technology personnel can design alternative embodiment without departing from the scope of the appended claims.
Claims (9)
1. a kind of electrolyte for aluminum electrolytic capacitor, it is characterised in that：Each component including following weight percentage：It is molten
Matter：15% ~ 20%, aoxidize membrane stabilizer：0.1% ~ 5%, flash over voltage elevator 1% ~ 10% inhales hydrogen agent 0.1% ~ 3%, surface-active
Agent：0.5% ~ 3%, fire retardant：5% ~ 10%, surplus is solvent.
2. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The solute be boric acid,
Ammonium pentaborate, ammonium azelate, azelaic acid hydrogen ammonium, ammonium sebacate isosebacic acid ammonium, branched Long carbon chain ammonium carboxylate salt, azelaic acid
The mixing of one or more of hydrogen ammonia.
3. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The oxidation membrane stabilizer
For the mixing of one or more of phosphorous acid, ammonium phosphite, ortho phosphorous acid, ammonium hypophosphite.
4. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The flash over voltage is promoted
Agent is the mixing of one or more of modified polyvinylalcohol or nano silicon dioxide dispersant.
5. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The suction hydrogen agent is nitro
One in phenol, p nitrobenzyl alcohol, 3-nitroacetophenone, ortho-nitroanisole, m-dinitrobenzene or paranitrobenzoic acid ammonium
Kind or two or more mixing.
6. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The surfactant is
The mixed solution that ammonium benzoate obtains after being reacted with polyethylene glycol 400.
7. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：The fire retardant is alkyl
Any one in phosphate, triethyl phosphate, tributyl phosphate.
8. a kind of electrolyte for aluminum electrolytic capacitor according to claim 1, it is characterised in that：Based on the solvent includes
Solvent and secondary solvent, main solvent are weight percentage the mixing for 50% ~ 60% ethylene glycol and 20% ~ 30% two kinds of diethylene glycol (DEG)
Solution.
9. a kind of preparation method of electrolyte for aluminum electrolytic capacitor, which is characterized in that include the following steps：
S1：Weight percent is sufficiently mixed for 50% ~ 60% ethylene glycol and 20% ~ 30% diethylene glycol (DEG), and is heated to 70 DEG C ~ 80
DEG C when be added flash over voltage elevator, stirred while being added, until completely dissolved, continue the solute of addition 15% ~ 20% simultaneously
120 DEG C ~ 130 DEG C are continuously heating to, is stirred until being completely dissolved；
S2：Mixed liquor in S1 is continued to be warming up to 135 DEG C ~ 150 DEG C, then weight percent is stablized for 0.1% ~ 5% oxidation film
Agent, 0.1% ~ 3% suction hydrogen agent and 0.5% ~ 3% surfactant are added, and are stirred continuously until being completely dissolved；
S3：Mixed liquor in step S2 is cooled to 80 DEG C ~ 85 DEG C, the fire retardant that weight percent is 5% ~ 10% is added, and certainly
So it is cooled to room temperature.
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| CN201810310031.5A CN108538590A (en) | 2018-04-09 | 2018-04-09 | A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof |
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| CN201810310031.5A CN108538590A (en) | 2018-04-09 | 2018-04-09 | A kind of electrolyte for aluminum electrolytic capacitor and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364360A (en) * | 2019-06-21 | 2019-10-22 | 无锡泰威电子有限公司 | Super-pressure flame-retardant electrolyte and preparation method thereof |
| CN110415979A (en) * | 2019-06-21 | 2019-11-05 | 无锡泰威电子有限公司 | Superhigh temperature LED light capacitor Working electrolyte and preparation method thereof |
| CN110415980A (en) * | 2019-06-21 | 2019-11-05 | 无锡泰威电子有限公司 | 8000V anti-lightning capacitor Working electrolyte and preparation method thereof |
| CN111524709A (en) * | 2020-04-27 | 2020-08-11 | 广东联盈控电子科技有限公司 | Working electrolyte for flame-retardant high-voltage aluminum electrolytic capacitor and preparation method thereof |
| CN112382508A (en) * | 2020-11-23 | 2021-02-19 | 深圳市智胜新电子技术有限公司 | Electrolyte of aluminum electrolytic capacitor, preparation method thereof and aluminum electrolytic capacitor |
| CN112951606A (en) * | 2021-01-26 | 2021-06-11 | 珠海格力新元电子有限公司 | Electrolyte for high-voltage bolt capacitor and preparation method thereof |
| CN113517138A (en) * | 2021-06-29 | 2021-10-19 | 西安交通大学 | Method for reducing working internal pressure of aluminum electrolytic capacitor by using hydrogen storage alloy |
| CN113517139A (en) * | 2021-06-29 | 2021-10-19 | 西安交通大学 | Method for reducing working internal pressure of aluminum electrolytic capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364360A (en) * | 2019-06-21 | 2019-10-22 | 无锡泰威电子有限公司 | Super-pressure flame-retardant electrolyte and preparation method thereof |
| CN110415979A (en) * | 2019-06-21 | 2019-11-05 | 无锡泰威电子有限公司 | Superhigh temperature LED light capacitor Working electrolyte and preparation method thereof |
| CN110415980A (en) * | 2019-06-21 | 2019-11-05 | 无锡泰威电子有限公司 | 8000V anti-lightning capacitor Working electrolyte and preparation method thereof |
| CN111524709A (en) * | 2020-04-27 | 2020-08-11 | 广东联盈控电子科技有限公司 | Working electrolyte for flame-retardant high-voltage aluminum electrolytic capacitor and preparation method thereof |
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| CN112951606A (en) * | 2021-01-26 | 2021-06-11 | 珠海格力新元电子有限公司 | Electrolyte for high-voltage bolt capacitor and preparation method thereof |
| CN112951606B (en) * | 2021-01-26 | 2022-07-29 | 珠海格力新元电子有限公司 | Electrolyte for high-voltage bolt capacitor and preparation method thereof |
| CN113517138A (en) * | 2021-06-29 | 2021-10-19 | 西安交通大学 | Method for reducing working internal pressure of aluminum electrolytic capacitor by using hydrogen storage alloy |
| CN113517139A (en) * | 2021-06-29 | 2021-10-19 | 西安交通大学 | Method for reducing working internal pressure of aluminum electrolytic capacitor |
| CN114350366A (en) * | 2021-12-09 | 2022-04-15 | 湖北兴福电子材料有限公司 | Silicon nitride and P-type polycrystalline silicon constant-speed etching solution |
| CN114350366B (en) * | 2021-12-09 | 2023-04-18 | 湖北兴福电子材料股份有限公司 | Silicon nitride and P-type polycrystalline silicon constant-speed etching solution |
| CN115732235A (en) * | 2022-10-26 | 2023-03-03 | 江苏瑞友康电子科技有限公司 | Electrolyte for capacitor with long service life and preparation method thereof |
| CN115732235B (en) * | 2022-10-26 | 2023-12-22 | 江苏瑞友康电子科技有限公司 | Electrolyte for long-life capacitor and preparation method thereof |
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Application publication date: 20180914 |
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