CN102930990A - Working electrolyte formula - Google Patents
Working electrolyte formula Download PDFInfo
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- CN102930990A CN102930990A CN 201110226430 CN201110226430A CN102930990A CN 102930990 A CN102930990 A CN 102930990A CN 201110226430 CN201110226430 CN 201110226430 CN 201110226430 A CN201110226430 A CN 201110226430A CN 102930990 A CN102930990 A CN 102930990A
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- working electrolyte
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Abstract
The invention provides a working electrolyte formula. The working electrolyte formula is characterized in that the solubility of 2-methyl azelate and the solubility of the salt of the 2-methyl azelate in ethylene glycol are high, and the 2-methyl azelate and the salt thereof are liquid at normal temperature, the conductivity of the 2-methyl azelate and the conductivity of the salt of the 2-methyl azelate can still be kept even if an ethylene glycol solvent in electrolyte is volatilized at high temperature, and the service life of a capacitor is prolonged.
Description
Technical field
The present invention relates to electrolyte for electrolytic capacitor, i.e. the driving electrolytic solution of electrolytic capacitor particularly relates to and can be advantageously used for mesohigh with the electrolyte composition of the driving electrolytic solution of aluminium electrolytic capacitor, relates generally to a kind of Working electrolyte prescription.
Background technology
Former electrolytic capacitor driving electrolytic solution, particularly as substantially making spent glycol as solvent in the mesohigh electrolyte, boric acid or boric acid ammonium salt are used as electrolytical additive, such electrolyte produces the crystallization water from boric acid, and between ethylene glycol and the boric acid because esterification generates a large amount of condensation water, cause the moisture of electrolyte system inside to raise, when its result uses this electrolyte under surpassing 100 ℃ serviceability temperature condition, water in the electrolyte will become steam and evaporate, voltage rise is high in the assembly of electrochemical capacitor thereupon, produces unavoidably so-called destruction problem.
In order to improve this shortcoming, can adopt straight chain type saturated dicarboxylic acid such as containing azelaic acid, decanedioic acid, dodecanedioic acid or its salt as electrolyte solution.But, this straight chain type saturated dicarboxylic acid is lower for solvent dissolubilities such as ethylene glycol, and along with volatilizing under the ethylene glycol solvent high temperature in the use electrolyte of capacitor, the straight chain type saturated dicarboxylic acid is easily as crystallization, thereby the generation super-high-current, can not avoid the capacitor hot properties deteriorated.
Chinese patent CN1511326A discloses a kind of 2-butyl suberic acid and salt thereof as the electrolyte of solute, because 2-butyl suberic acid makes moderate progress for the solubility of the ethylene glycol solvent solubility than aforementioned linear type saturated dicarboxylic acid or its salt, thereby tells on.
Summary of the invention
The invention provides a kind of new Working electrolyte prescription, it utilizes 2-methyl azelaic acid and salt thereof solubility in ethylene glycol large, and namely present at normal temperatures liquid characteristic, therefore, even volatilize under the ethylene glycol solvent high temperature in the electrolyte, 2-methyl azelaic acid and salt thereof still can keep its conductivity, prolong the useful life of capacitor.
It is solvent that the present invention adopts ethylene glycol, take 2-methyl azelaic acid and salt thereof as main solute, add various additives and be mixed with electrolytic capacitor driving high-voltage working electrolyte, it is characterized in that the various additives that add are grouped into by the one-tenth of following weight proportioning: main electrolyte: 1%-10%, assisted electrolysis matter: 2%-5%, solvent: 64.5%-80%, flash over voltage elevator: 10%-20%, waterproof mixture: 0.1%-1%, hydrogen agent: 0.1%-1% disappears.
Use this working electrolyte of electrolytic capacitor can reach following index: flash over voltage 450-460V, 40 ℃ of lower conductivity (2.0～2.4) * 10
-3S/cm, the high temperature resistance and long life-span is more than 125 ℃ of life test 2000h.
Embodiment
The invention provides a kind of Working electrolyte prescription, it adopts ethylene glycol is solvent, take 2-methyl azelaic acid and salt thereof as main solute, add various additives and be mixed with electrolytic capacitor and drive and use the electrochemical capacitor Working electrolyte, it is characterized in that it is grouped into by the one-tenth of following weight proportioning:
Main electrolyte: 1%-10%,
Assisted electrolysis matter: 2%-5%,
Solvent: 64.5%-80%,
Flash over voltage elevator: 10%-20%,
Waterproof mixture: 0.1%-1%,
Hydrogen agent: 0.1%-1% disappears.
Wherein main electrolyte is 2-methyl azelaic acid and salt thereof; Assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof; Solvent is one or more organic solvents in alcohols or the ethers, preferred ethylene glycol; The flash over voltage elevator is the ethylene glycol solution that contains 12% polyvinyl alcohol; Described waterproof mixture is phosphorus-containing compound; The described hydrogen agent that disappears is nitro compound, comprises in p-nitrophenol, o-nitrophenol, meta-dinitro-benzent, paranitroanisole or the p-nitrophenyl methyl alcohol one or more.
Embodiment:
Configure electrolyte by following weight ratio:
| Composition | Content |
| Ethylene glycol | 60％ |
| Cetomacrogol 1000 | 4％ |
| The ethylene glycol solution that contains 2-methyl ammonium azelate 20% | 20％ |
| Ammonium sebacate | 3％ |
| Ammonium hypophosphite | 0.5％ |
| P-nitrophenyl methyl alcohol | 0.5％ |
| The ethylene glycol solution that contains 12% polyvinyl alcohol | 12％ |
Institute's electrolyte performance index are as follows according to the above ratio:
| Project | Technical indicator |
| Sparking voltage | 460V |
| Conductivity M/S 40℃ | 2.2±0.2ms/cm |
| The pH value | 6.5-6.8 |
| Arrive voltage | 480V |
| 125 ℃ of life tests | 2000h |
Claims (7)
1. Working electrolyte prescription, it is take ethylene glycol as solvent, take 2-methyl azelaic acid and salt thereof as main solute, add various additives and be mixed with electrolytic capacitor and drive and to use high-voltage working electrolyte, it is characterized in that: various additives are grouped into by the one-tenth of following weight proportioning: main electrolyte: 1%-10%, assisted electrolysis matter: 2%-5%, solvent: 64.5%-80%, flash over voltage elevator: 10%-20%, waterproof mixture: 0.1%-1%, hydrogen agent: 0.1%-1% disappears.
2. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: main electrolyte is 2-methyl azelaic acid and salt thereof.
3. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof.
4. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: solvent is one or more organic solvents in alcohols or the ethers, preferred ethylene glycol.
5. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: the flash over voltage elevator is the ethylene glycol solution that contains 12% polyvinyl alcohol.
6. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: the waterproof mixture is phosphorus-containing compound.
7. a kind of Working electrolyte prescription according to claim 1, it is characterized in that: the hydrogen agent that disappears is nitro compound, comprises in p-nitrophenol, o-nitrophenol, meta-dinitro-benzent, paranitroanisole or the p-nitrophenyl methyl alcohol one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226430 CN102930990A (en) | 2011-08-09 | 2011-08-09 | Working electrolyte formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226430 CN102930990A (en) | 2011-08-09 | 2011-08-09 | Working electrolyte formula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102930990A true CN102930990A (en) | 2013-02-13 |
Family
ID=47645767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110226430 Pending CN102930990A (en) | 2011-08-09 | 2011-08-09 | Working electrolyte formula |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102930990A (en) |
-
2011
- 2011-08-09 CN CN 201110226430 patent/CN102930990A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |