CN1692459A - Electrolyte for electrolytic capacitor and electrolytic capacitor containing the same - Google Patents
Electrolyte for electrolytic capacitor and electrolytic capacitor containing the same Download PDFInfo
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- CN1692459A CN1692459A CN200380100729.6A CN200380100729A CN1692459A CN 1692459 A CN1692459 A CN 1692459A CN 200380100729 A CN200380100729 A CN 200380100729A CN 1692459 A CN1692459 A CN 1692459A
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Abstract
Electrolyte solution and an electrolytic capacitor using it having a low impedance characteristic, having a high withstand voltage characteristic of 100 V class, and a high temperature life characteristic is provided. The electrolyte solution containing an aluminum tetrafluoride salt, and a solvent with high boilling point, such as sulfolane, 3-methyl sulfolane, and 2,4-dimethyl sulfolane, and the like are used. The electrolytic capacitor of the present invention has the low impedance characteristic, the high withstand voltage characteristic, and the excellent high temperature life characteristic.
Description
Technical field
The electrolytic capacitor that the present invention relates to electrolyte for electrolytic capacitor and adopted it especially has the electrolyte for electrolytic capacitor of low impedance characteristic and high withstand voltage characteristic and the electrolytic capacitor that has adopted it.
Technical background
Electrolytic capacitor generally is anode electrode paper tinsel and cathode electrode foil to be clipped the separator that is made of Manila paper roll, form capacitor element, wherein, highly purified aluminium foil to band shape carries out chemistry or electrochemical etch process, aluminium foil surface is enlarged, and in chemical conversion liquid such as ammonium borate aqueous solution, this aluminium foil is carried out chemical conversion and handle, make the surface form the oxide skin rete, as the anode electrode paper tinsel; Highly purified aluminium foil is only carried out etch processes, as cathode electrode foil.And this capacitor element is placed in the outer dress box body that bottom tube-like is arranged that is made of aluminium etc. after the dipping electrolytic capacitor drives the electrolyte of usefulness.Adorn the peristome of box body outside the seal body that is made of elastic caoutchouc is installed, outer dress box body is sealed by deep-draw processing.
Herein, the electrolyte as the electrolytic capacitor driving usefulness with high conductivity of flooding in the capacitor element uses following material: be main solvent with γ-Ding lactones; As solute, the ring-type amidine compound is carried out the cation of level Four gained, be that imidazoline cation and glyoxaline cation are as cation constituent, the conjugate base of acid as anion component, is made the material (opening flat 08-321440 communique and the flat 08-321441 communique of Te Kai with reference to the spy) after the salt that obtains like this dissolves.
Yet in recent years, electronic message unit was moving towards digitlization, and the heart portion of these electronic message units, and promptly the driving frequency of microprocessor is being moved towards high speed.The consumed power of the electronic component of peripheral circuit constantly increases, and the increase of the pulsating current of following therewith becomes significantly, and the electrolytic capacitor of using in this circuit is just required low impedance characteristic.
Also have, particularly in automotive field,, very high to the requirement of aforesaid low impedance characteristic along with the high performance of automotive performance.The driving voltage of vehicle mounted circuit is 14V, and but, along with the increase of consumed power, to 42V development, for corresponding with this driving voltage, the voltage-resistent characteristic of electrolytic capacitor needs 28V, more than the 84V.And the requirement that has high temperature to use in this field requires life characteristics at high temperature to electrolytic capacitor.
Yet above-mentioned electrolyte for electrolytic capacitor can not corresponding this low impedance characteristic, also have, though proof voltage on be limited to 30V can corresponding 28V, can not satisfy the requirement of the high withstand voltage more than the 84V.
Summary of the invention
Therefore, the object of the invention is to provide-kind have low impedance characteristic, also have the high withstand voltage characteristic of 100V level, electrolyte for electrolytic capacitor that life characteristics at high temperature is also good and the electrolytic capacitor that has adopted it.
Electrolyte for electrolytic capacitor of the present invention is characterised in that, contains tetrafluoro aluminium salt and high boiling solvent.
Also have,, be characterised in that, adopted sulfolane, 3-methyl sulfolane, 2, the 4-dimethylsulfolane as above-mentioned high boiling solvent.
So electrolytic capacitor of the present invention is characterised in that, adopted above-mentioned electrolyte for electrolytic capacitor.
Embodiment
Electrolyte for electrolytic capacitor of the present invention contains tetrafluoro aluminium salt and high boiling solvent, and the sparking voltage height has the low-resistivity characteristic.And high-temperature stability is also good.
Tetrafluoro aluminium salt is to be the salt of anion component with tetrafluoro aluminium, as this salt, can adopt ammonium salt, amine salt, 4 grades of ammonium salts or is the salt of cation constituent with level Four ring-type amidine [ア ミ ジ ニ ウ system] ion.As the amine that constitutes amine salt, can enumerate: primary amine (methylamine, ethamine, propylamine, butylamine, ethylenediamine hydrate, monoethanolamine etc.), secondary amine (dimethylamine, diethylamine, di-n-propylamine, ethylmethylamine, diphenylamines, diethanol amine etc.), tertiary amine (trimethylamine, triethylamine, tri-n-butylamine, triethanolamine etc.).Also have, as the 4th grade of ammonium that constitutes the 4th grade of ammonium salt, can enumerate tetraalkyl quaternary ammonium (tetramethylammonium, etamon, tetrapropylammonium, tetrabutylammonium, methyl three second ammoniums, dimethyl diethyl ammonium etc.), pyridium (1-picoline nurse, 1-ethylpyridine nurse, 1,3-parvoline nurse etc.).
And, in the salt of level Four ring-type amidine as cation constituent, the level Four ring-type amidine that constitutes cation constituent is having N, N, the cyclic compound of N '-displacement amidino groups has carried out the cation of level Four gained, as having N, N, the cyclic compound of N '-displacement amidino groups, can enumerate following compound: imidazoles monocyclic compound (1-methylimidazole, the 1-phenylimidazole, 1, the 2-methylimidazole, 1-ethyl-glyoxal ethyline, 2-ethyl-1-methylimidazole, 1,2-diethyl imidazoles, 1,2, the similar bodies of imidazoles such as 4-tri-methylimidazolium, 1-methyl-2-hydroxymethyl imidazoles [1-メ チ Le-2-オ キ シ メ チ Le イ ミ グ ゾ-Le], 1-methyl-hydroxyl alkali redundant organisms such as 2-hydroxyethyl imidazoles, nitro redundant organisms such as 1-methyl-4 (5)-nitroimidazole, 1, amino redundant organisms such as 2-dimethyl 5 (4)-aminooimidazoles etc.), benzimidazole compound (1-tolimidazole, 1-methyl-2-benzyl benzimidazole, 1-methyl-5 (6)-nitrobenzimidazole etc.), compound (1-methylimidazole quinoline with 2-imidazoline ring, 1,2-methylimidazole quinoline, 1,2,4-tri-methylimidazolium quinoline, 1-methyl-2-benzylimidazoline, 1-ethyl-glyoxal ethyline quinoline, 1,4-dimethyl-2-ethyl imidazol(e) quinoline, 1-methyl-2-ethoxyl methyl imidazoline etc.), compound (1-methyl isophthalic acid, 4,5 with tetrahydropyrimidine ring, the 6-tetrahydropyrimidine, 1,2-dimethyl-1,4,5, the 6-tetrahydropyrimidine, 1,8-diazabicylo (5,4,0) endecatylene-7,1,5-diazabicylo (4,3,0) nonene-5 etc.) etc.
And,, can enumerate following solvent as the used high boiling solvent of the present invention.That is sulfolane class: sulfolane, 3-methyl sulfolane, 2,4-dimethylsulfolane etc., 1,3-diethyl-2-imidazolidinone, 1,3-dipropyl 2-imidazolidinone, 1-methyl-3-ethyl-2-imidazolidinone etc., 1,3,4-three bases-2-imidazolidinone: 1,3,4-trimethyl-2-imidazolidinone etc., 1,3,4,5-four bases-2-imidazolidinone: 1,3,4,5-tetramethyl-2-imidazolidinone etc., 3-ethyl-1,3-oxazolidine-2-ketone etc., carbonic ether: ethene carbonic ether, propylene carbonate etc.Among them, with sulfolane, 3-methyl sulfolane, 2,4-dimethylsulfolane, anti-leakage characteristic is good, thereby is preferred.Promptly, usually, cathode current flows on the cathode wire, generate hydroxyl ion, basicity will rise, but, even because these solvents pH does not decompose more than 7 yet, thereby the leakage state that the decomposition because of solvent causes can not appear under the situation that has adopted quarternary ammonium salt, level Four ring-type amidine salt yet.
Electrolyte of the present invention contains high boiling solvent, but, except these solvents, can adopt following solvent.That is, can adopt protic polar solvent, non-protonic solvent and their mixture.As the protic polar solvent, can enumerate monovalence alcohols (ethanol, propyl alcohol, butanols, amylalcohol, hexanol, cyclobutanol, cyclopentanol, cyclohexanol, phenmethylol etc.), multivalence alcohols and contain oxygen alcoholic compound class (ethylene glycol, propylene glycol, glycerine, methyl match fine jade Suo Fu, ethyl match fine jade Suo Fu, MPEG, dimethoxy propyl alcohol etc.) etc.Also have, polar solvent as non-proton property, can enumerate amide-type (N-methylformamide, N as representative, dinethylformamide, N-ethyl-formamide, N, N-diethylformamide, N-methylacetamide, N, N-dimethylacetylamide, N-ethyl acetamide, N, N-diethyl acetamide, hexamethyl phosphoric acid acetamide etc.), interior lipid (γ-Ding lactones, γ-penta lactones, δ-penta lactones etc.), cyclic amide (N-N-methyl-2-2-pyrrolidone N-etc.), nitrile (methane cyanide acetonitrile etc.), sulfoxide class (dimethyl sulfoxide (DMSO) etc.) etc.
And the content in the solvent of high boiling solvent should be discontented with 25wt%, preferably 1～20%, and 3～15wt% more preferably.The words resistivity that surpasses this scope will rise, and more than the lower limit of this scope, high-temperature stability will improve.
Above electrolyte for electrolytic capacitor of the present invention has the low-resistivity characteristic, sparking voltage is also high, high-temperature stability is also good, thereby has used the electrolytic capacitor of this electrolyte for electrolytic capacitor to have the high withstand voltage characteristic of low impedance characteristic and 100V level, and life characteristics at high temperature is also good.
And, in the present invention,, use and carried out the electrode foil that phosphoric acid is handled as electrode foil.Only with in anode electrode paper tinsel, the cathode electrode foil-kind also have effect of the present invention, but, the words that the both uses just can suppress the deterioration of two electrode foils, thereby common both's usefulness.Common highly purified aluminium foil is carried out chemistry or electrochemical etch process, as etched foil, but, as electrode foil of the present invention, carry out the etched foil of aqueous phosphatic impregnation process gained in the etched pre-treatment of the interchange of employing in this etching work procedure, intermediate treatment or the reprocessing, with it as cathode electrode foil.And, to this etched foil, or do not carry out the etched foil that phosphoric acid handles and carry out phosphoric acid chemistry conversion process, perhaps before chemical conversion, in the middle or reprocessing, carry out phosphate impregnation and handle, the electrode foil of gained as the anode electrode paper tinsel.
Also have, add phosphorus compound in above-mentioned electrolyte for electrolytic capacitor, effect of the present invention will improve.As this phosphorus compound, can enumerate following material.Orthophosphoric acid, phosphorous acid, ortho phosphorous acid and their salt as their salt, have ammonium salt, aluminium salt, sodium salt, calcium salt, sylvite.Can also enumerate phosphate cpds such as phosphoric acid second fat, p diethylaminobenzoic acid fat, phosphoric acid fourth fat, phosphoric acid dibutylester, 1-hydroxy ethylidene-1, phosphinic acid compounds such as 1-di 2 ethylhexyl phosphonic acid, Amino Trimethylene Phosphonic Acid, phenyl-phosphonic acid etc.Can also enumerate hypophosphorous acid formicester, hypophosphorous acid fourth fat grade phosphate cpd.
Can also enumerate following condensed phosphoric acid or their salt.Straight chain shape condensed phosphoric acids such as pyrophosphoric acid, tripolyphosphate, four polyphosphoric acids, cyclic condensation phosphoric acid such as metaphosphoric acid, hexa metaphosphoric acid, or the material of this chain, cyclic condensation phosphoric acid be combined into.And,, can adopt ammonium salt, aluminium salt, sodium salt, calcium salt, sylvite etc. as the salt of these condensed phosphoric acids.
Addition is 0.05～3wt%, preferably 0.1～2wt%.
Above electrolytic capacitor of the present invention has the high withstand voltage characteristic of low impedance characteristic and 100V level, and life characteristics at high temperature is better.Promptly, adopt tetrafluoro aluminium salt, carried out experiment of high-temperature load, the result is because the moisture in the electrolyte, it is big that the reactivity of electrolyte and electrode foil becomes, characteristic has been brought influence, but, because above electrolytic capacitor has adopted the electrode foil of handling through phosphoric acid, thereby the reaction of electrolyte and electrode foil is suppressed, and life characteristics at high temperature is more stable.
Also have, among the present invention, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide, form the partial cross-linked buttress rubber of peroxide as crosslinking agent, with it as seal body.As the vulcanizing agent that peroxide vulcanization is used, can enumerate ketone peroxide class, ketal peroxide class, hydrogen peroxide class, dialkyl peroxide, diazine peroxide, peroxy dicarbonate lipid, peroxide lipid etc.Specifically can enumerate 1,1-pair-t-butylperoxy-3,3,5-trimethyl cyclohexane [1,1-PVC ス-t-Block チ Le パ one オ キ シ-3,3,5-ト リ メ チ Le シ Network ロ ヘ キ サ Application], n-butyl-4,4-two-t-butylperoxy bromination penta ethamine fat [n-Block チ Le-4,4-PVC ス-t-Block チ Le パ one オ キ シ バ レ レ one ト], two trimethyl peroxidating benzoic acids [ジ Network ミ Le パ one オ キ サ イ De], benzoyl hydroperoxide uncle fourth fat [t one Block チ Le パ one オ キ シ ベ Application ゾ エ one ト], two-peroxide uncle fourth fat [ジ-t-Block チ Le パ one オ キ サ イ De], benzoyl peroxide [ベ Application ゾ イ Le パ-オ キ サ イ De], 1, two (t-butylperoxy-different third) benzene [1 of 3-, 3-PVC ス (t-Block チ Le パ one オ キ シ-イ ソ プ ロ ピ Le) ベ Application ゼ Application], 2,5-dimethyl-2,5-two-t-butyl peroxy ethyl-acetylene-3[2,5-ジ メ チ Le-2,5-ジ-t-Block チ Le パ-オ キ シ Le ヘ キ シ Application-3], t-butylperoxy cumene [t-Block チ Le パ-オ キ シ Network メ Application], α, α '-two (t-butylperoxy) diisopropyl benzene [α, α '-PVC ス (t-Block チ Le パ one オ キ シ) ジ イ ソ プ ロ ピ Le ベ Application ゼ Application] etc.
As mentioned above, electrolytic capacitor of the present invention, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide as crosslinking agent, form the partial cross-linked buttress rubber of peroxide, with it as seal body, adopted the electrolyte that contains tetrafluoro aluminium salt, thereby has a high withstand voltage characteristic of low impedance characteristic and 100V level, because the good high-temperature characteristic that seal body that uses among the present invention and electrolyte have, thereby life characteristics at high temperature further improves.
Also have, in the former level Four ring-type amidine compound, near the reaction of the hydroxyl ion that produces the negative electrode ejector can cause the leakage tendency, but in the present invention, can think and have good sealing property between the through hole of seal body and the lead, and electrolyte that uses among the present invention and hydroxyl ion is reactive low, and their synergism can prevent the leakage state.
Embodiment
Secondly, with embodiment the present invention is described.Capacitor element clips separator to anode electrode paper tinsel and cathode electrode foil and rolls and form.Antianode electrode foil, cathode electrode foil connect anode respectively and draw the lead that the lead of usefulness, negative electrode are drawn usefulness again.
These leads are by the connecting portion that joins with this electrode foil, constitute with integrally formed round bar part of this connecting portion and the external connecting that is fixed on the front end of round bar part.Also have, connecting portion and round bar part are made of 99% aluminium, and external connecting is made of copper coated iron wire (hereinafter referred to as the CP line).On the surface of round bar part at least of this lead, handle through the chemical conversion of ammonium phosphate solution, form the anodic oxide coating that constitutes by aluminium oxide.This lead adopts respectively at connecting portion and sews on or method such as ultrasonic bonding and be electrically connected on the two poles of the earth electrode foil.
The anode electrode paper tinsel adopts following paper tinsel: the aluminium foil of purity 99.9% is carried out chemistry or chemical etching in acid solution, carry out carrying out chemical conversion and handle in the ammonium adipate aqueous solution after the processing of expansion face, form the anodic scale rete on its surface.
And, the capacitor that has flooded electrolyte is placed in the outer dress box body that bottom tube-like is arranged that is made of aluminium, adorn the peristome of box body outside seal body is installed, and the end of externally adorning box body carries out deep-draw processing, seal adorning box body outward.Seal body has the through hole of deriving lead respectively.
(table 1) expression electrolyte for electrolytic capacitor used herein.In addition, as a comparative example, electrolyte γ-Ding lactones 90wt%, anhydride phthalic acid hydrogen 1-ethyl-2 before having used, 3-methylimidazole quinoline [the plain 1-エ of Off Le sour water チ Le-2,3-ジ メ チ Le イ ミ グ ゾ リ ニ ウ system] 10wt%.Sparking voltage is 105V, and resistivity is 142 Ω cm.
The specification of the electrolytic capacitor of Gou Chenging is 100WV-33 μ F in a manner described, and the characteristic of these electrolytic capacitors is estimated.Experimental condition is under 125 ℃, loaded 1000 hours.(table 2) represents this result.
(table 1)
| ????GBL | ????SL | ????A | Sparking voltage (V) | Resistivity (Ω cm) | |
| Embodiment 1 | ????85 | ????5 | ????10 | ????210 | ????77 |
| Embodiment 2 | ????80 | ????10 | ????10 | ????207 | ????80 |
| Embodiment 3 | ????75 | ????15 | ????10 | ????211 | ????84 |
| Embodiment 4 | ????70 | ????20 | ????10 | ????204 | ????88 |
| Comparative example | ????90 | ????- | ????10 | ????205 | ????73 |
GBL: γ-Ding lactones
SL: sulfolane
A: tetrafluoro aluminic acid 1-ethyl-2,3-methylimidazole quinoline
(table 2)
| The initial stage characteristic | 125 ℃-1000 hours | |||
| ??Cap(μF) | ????tanδ | ???ΔCap(％) | ????tanδ | |
| Embodiment 1 | ????33.6 | ????0.014 | ????-2.2 | ????0.019 |
| Embodiment 2 | ????33.5 | ????0.014 | ????-2.2 | ????0.019 |
| Embodiment 3 | ????33.6 | ????0.015 | ????-2.1 | ????0.018 |
| Embodiment 4 | ????33.5 | ????0.015 | ????-2.0 | ????0.017 |
| Comparative example | ????33.5 | ????0.014 | ????-2.0 | ????0.023 |
Cap: capacitor; Tan δ: the tangent of induced electricity loss; Δ Cap: electrostatic capacitance change rate.
By (table 1) as can be seen, the sparking voltage of the electrolyte for electrolytic capacitor of embodiment is than comparative example height, and resistivity is also low.And, by (table 2) as can be seen, used the tan δ of electrolytic capacitor of 100WV of this electrolyte low, life characteristics at high temperature is also good than comparative example.Also have, with the sulfolane exchange, with 1,3-diethyl imidazolidinone also can obtain same result.
And, as anode electrode paper tinsel or cathode electrode foil, implemented the electrode foil that phosphoric acid is handled if adopt, life characteristics at high temperature will further improve, and adds phosphorus compound again in electrolyte, and life characteristics at high temperature also can improve.Also have, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide, form the partial cross-linked buttress rubber of peroxide, as seal body, just improved the leakage characteristic with it as crosslinking agent.
Industrial applicibility
According to the present invention owing to adopted the electrolyte for electrolytic capacitor that contains tetrafluoro aluminium salt and high boiling solvent, thereby can provide have low impedance characteristic, the high withstand voltage characteristic, life characteristics at high temperature is good electrolytic capacitor also.
Claims (5)
1. an electrolyte for electrolytic capacitor contains tetrafluoro aluminium salt and high boiling solvent.
2. electrolyte for electrolytic capacitor as claimed in claim 1, wherein, described high boiling solvent is sulfolane, 3-methyl sulfolane, 2, the 4-dimethylsulfolane.
3. an electrolytic capacitor has adopted claim 1 or 2 described electrolyte for electrolytic capacitor.
4. electrolytic capacitor as claimed in claim 3 wherein, as anode electrode paper tinsel or cathode electrode foil, adopts and has implemented the electrode foil that phosphoric acid is handled.
5. electrolytic capacitor as claimed in claim 3, wherein, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide as crosslinking agent, form the partial cross-linked buttress rubber of peroxide, with it as seal body.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002326019A JP2004165209A (en) | 2002-11-08 | 2002-11-08 | Electrolytic capacitor |
| JP326019/2002 | 2002-11-08 | ||
| JP2002326028A JP2004165213A (en) | 2002-11-08 | 2002-11-08 | Electrolytic capacitor |
| JP326028/2002 | 2002-11-08 | ||
| JP2002326723A JP2004165263A (en) | 2002-11-11 | 2002-11-11 | Electrolyte for electrolytic capacitor and electrolytic capacitor using it |
| JP326723/2002 | 2002-11-11 | ||
| PCT/JP2003/014218 WO2004042759A1 (en) | 2002-11-08 | 2003-11-07 | Electrolyte for electrolytic capacitor and electrolytic capacitor containing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1692459A true CN1692459A (en) | 2005-11-02 |
| CN1692459B CN1692459B (en) | 2010-05-12 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801029134A Expired - Fee Related CN100452258C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor manufacturing method |
| CNB2003801029098A Expired - Fee Related CN100550239C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor |
| CN200380100729.6A Expired - Fee Related CN1692459B (en) | 2002-11-08 | 2003-11-07 | Electrolyte for electrolytic capacitor and electrolytic capacitor containing the same |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801029134A Expired - Fee Related CN100452258C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor manufacturing method |
| CNB2003801029098A Expired - Fee Related CN100550239C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004165209A (en) |
| CN (3) | CN100452258C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111133543A (en) * | 2017-09-28 | 2020-05-08 | 日本贵弥功株式会社 | Gel electrolytic capacitor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009072476A1 (en) * | 2007-12-05 | 2009-06-11 | Nagaoka University Of Technology | Terpolymer composed of isobutene, isoprene and styrylisoprene, process for production thereof, and sealing member for electrolytic capacitor |
| CN105814652A (en) * | 2014-09-03 | 2016-07-27 | 株式会社Tbk | Retarder electromagnetic coil |
| JP7206758B2 (en) * | 2018-09-28 | 2023-01-18 | 日本ケミコン株式会社 | Method for estimating lifetime of capacitor, program for estimating lifetime thereof, information processing device, and capacitor |
| CN112582176B (en) * | 2020-11-10 | 2021-09-07 | 西安交通大学 | Method for improving specific volume and hydration resistance of low-voltage anodized formed foil of aluminum electrolytic capacitor |
| CN112582177B (en) * | 2020-11-10 | 2021-11-19 | 西安交通大学 | Method for improving specific volume and hydration resistance of high-voltage anodized formed foil in aluminum electrolytic capacitor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0684620B1 (en) * | 1993-12-03 | 2003-06-04 | Sanyo Chemical Industries, Ltd. | Electrolytic solution and electrochemical element prepared therefrom |
| JP2907718B2 (en) * | 1993-12-29 | 1999-06-21 | 昭和アルミニウム株式会社 | Etching method of aluminum foil for electrolytic capacitor electrode |
| JP3220620B2 (en) * | 1995-05-26 | 2001-10-22 | 松下電器産業株式会社 | Aluminum electrolytic capacitor |
| CN101261900B (en) * | 2001-05-11 | 2011-02-02 | 三菱化学株式会社 | Electrolyte for electrolytic capacitor and electrolytic capacitor using the same |
-
2002
- 2002-11-08 JP JP2002326019A patent/JP2004165209A/en active Pending
-
2003
- 2003-11-07 CN CNB2003801029134A patent/CN100452258C/en not_active Expired - Fee Related
- 2003-11-07 CN CNB2003801029098A patent/CN100550239C/en not_active Expired - Fee Related
- 2003-11-07 CN CN200380100729.6A patent/CN1692459B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111133543A (en) * | 2017-09-28 | 2020-05-08 | 日本贵弥功株式会社 | Gel electrolytic capacitor |
| US11139116B2 (en) | 2017-09-28 | 2021-10-05 | Nippon Chemi-Con Corporation | Gel electrolytic capacitor |
| CN111133543B (en) * | 2017-09-28 | 2021-11-19 | 日本贵弥功株式会社 | Gel electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1711617A (en) | 2005-12-21 |
| CN1711615A (en) | 2005-12-21 |
| CN1692459B (en) | 2010-05-12 |
| JP2004165209A (en) | 2004-06-10 |
| CN100452258C (en) | 2009-01-14 |
| CN100550239C (en) | 2009-10-14 |
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Address after: Tokyo, Japan Co-patentee after: MITSUBISHI CHEMICAL Corp. Patentee after: NIPPON CHEMI-CON Corp. Address before: Tokyo, Japan Co-patentee before: MITSUBISHI RAYON Co.,Ltd. Patentee before: NIPPON CHEMI-CON Corp. |
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