WO2004019355A1 - 電解液 - Google Patents
電解液 Download PDFInfo
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- WO2004019355A1 WO2004019355A1 PCT/JP2003/010475 JP0310475W WO2004019355A1 WO 2004019355 A1 WO2004019355 A1 WO 2004019355A1 JP 0310475 W JP0310475 W JP 0310475W WO 2004019355 A1 WO2004019355 A1 WO 2004019355A1
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- WIPO (PCT)
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- electrolytic solution
- carbon atoms
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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
Definitions
- the present invention relates to an electrolytic solution, and more particularly, to an electrolytic solution used for an electrolytic capacitor.
- An object of the present invention is to provide an electrolyte that generates a high spark voltage without lowering the specific conductivity.
- the spark voltage has a strong correlation with the van der Waals volume of the anion component in the electrolyte, and the larger the van der Waals volume, the higher the spark voltage.
- the specific conductivity tends to decrease as the van der volume of the anion component increases.
- the spark voltage may be different even with the same van der Waals volume and the same specific conductivity.
- the present invention relates to an electrolytic solution comprising an organic polar solvent (C), and a carboxylic acid (AO) and / or a carboxylate (B), wherein the carboxylic acid anion (A) comprises
- the energies of formation of the ion binder (D) in water are less than 250 kca 1 / mo 1 and more than 500 kca 1 / mo 1 when calculated by the MM 3 ZPM 3 method of the C AC he system. It is an electrolytic solution characterized by the above-mentioned.
- the dicarboxylic acid (A) derived from the carboxylic acid (AO) and Z or the carboxylate (B), which is a component of the electrolytic solution of the present invention, is a coordination bond (D) ) Is typically less than 250 kca 1 / mo 1, preferably less than 300 kca 1 / mo 1, when calculated by the MM 3 ZPM 3 method of the C AC he system, It is preferably at most 350 kca 1 / mo 1 or less, usually at least -500 kca 1 / mo 1 or more, preferably at -450 kca 1 / mo 1 or more.
- the effect of improving the spark voltage is small.
- the low energy of formation of the ionic compound (D) between the carboxylic acid anion (A) and the aluminum ion makes it possible to increase the spark voltage without increasing the van der Waals volume of the carboxylic acid anion.
- an electrolyte having a high specific conductivity and a high spark voltage is provided. The reason why the spark voltage is high is not clear This is presumed to be because the formation of (D) can suppress the diffusion of aluminum ions into the electrolytic solution, and efficiently repair the defective part of the adult skin.
- the generated energy can be calculated by inputting the structure of D using the software “CAClie 4.4” manufactured by Fujitsu Limited and selecting the calculation method of the MM 3 ZPM 3 method.
- the dicarboxylic acid (A) is preferred because it easily coordinates with the aluminum ion, which is a dicarboxylic acid, and the energy generated is reduced.
- the anion (A) used in the present invention is the energy generated in water calculated by the MM 3 / PM 3 method of the C AC he system for the ionic compound (D) that forms with aluminum ion. Is less than 250 kca 1 / mo 1.
- the aluminum ion refers to a trivalent cation A 13 + .
- the volume of van der Waals of anionic acid (A) can be in an appropriate range corresponding to the required spark voltage and specific conductivity, but medium-high pressure exceeding 100 V from the viewpoint of obtaining an electrolytic solution suitable for grade capacitor, preferably 1 9 0 a 3 or higher, 2 5 OA 3 or more, and also, 5 0 OA 3 or less rather preferably, 40 0 a 3 or less is more preferable.
- the van der Waals volume here can be calculated by the C AC he system, and by connecting points having the same probability of electron existence in three-dimensional space and energy of 18 kca 1 / mo 1 The volume of the formed solid.
- the absolute value of the difference between the solubility parameter (hereinafter abbreviated as SP value) of the sulfonic acid anion (A) calculated by the Fedors method and the SP value of the organic polar solvent (C) is the solvent solubility of the electrolyte.
- the number is preferably 4 or more, 9 or less, and more preferably 8 or less.
- the SP value of sulfonic acid anion (A) calculated by the Fedors method is the value calculated by the method described in Polymer Engineering and Science, Vol. 14, ⁇ .2, ⁇ 147-154 (1974) J It is. That is, the SP value ⁇ (25 ° C) is given by the following equation. 1/2 1/2
- ⁇ e, ⁇ V evaporation energy and molar volume of an atom or atomic group, respectively.
- ⁇ number of main chain skeleton atoms in the minimum repeating unit of the polymer.
- the dicarboxylic acid ( ⁇ ⁇ ) used in the present invention was calculated by the MM 3 / PM 3 method of the CAChe system from the viewpoint of stability against molecular cleavage during voltage application and thermal history (A)
- the maximum value of the highest occupied orbital electron density in the molecule is preferably 0 or more, more preferably 0.5 or less, and even more preferably 0.3 or less.
- dicarboxylic acid (A) is unlikely to undergo molecular breakage due to electrical and thermal energy.
- the dicarboxylic acid (A) can suppress the esterification reaction with the solvent and has a small decrease in the specific conductivity at a high temperature (100 ° C to 180 ° C). More preferably, it is a dianion. This is because a secondary dicarboxylic acid has a steric hindrance because it has a substituent at the ⁇ -position to the carboxyl group.
- the dicarboxylic acid anion ( ⁇ ) is a compound represented by the following general formula (1) (A1) or a compound represented by the following general formula (2) ( ⁇ 2); Among (II), dicarboxylic acid dianion having an ether bond, dicarboxylic acid dianion having a hydroxyl group, and dicarboxylic acid dianion having an asymmetric side chain are preferable.
- X is a linear or branched saturated or unsaturated divalent hydrocarbon group having 1 to 12 carbon atoms, and having 2 or more carbon atoms from the viewpoint of achieving both high specific conductivity and spark voltage. It is preferably 4 or more, more preferably 10 or less, and still more preferably 8 or less. X may have an ether bond.
- X is, for example, an ethylene group, a propylene group, an isopropylene group, a butylene group, an isobutylene group, a pentylene group, a hexylene group, a heptylene group, an octylene group, —O [CH 2 ] n-0- (n is 1 to A group represented by the formula: 10), a group represented by —OC 6 H 4 —O—, a polyoxyalkylene group (polymerization degree: 2 to 4, an alkylene group is an ethylene group or an iso-2-propylene group), and the like.
- a hexylene group, a heptylene group, an octylene group and a polyoxyalkylene group are particularly preferred.
- R 2 is a linear or branched saturated or unsaturated monovalent hydrocarbon group having 2 or more and 10 or less, wherein R or R 2 is different, or R is R 2 It is a monovalent hydrocarbon group having an ether bond of number 2 or more and 10 or less, and RR 2 may be the same or different.
- R 2 is, for example, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a 2-ethylhexyl group, a methylpolyoxyalkylene group ( Examples thereof include a degree of polymerization of 2 to 4, an alkylene group is an ethylene group or an isopropylene group, and a phenylpolyoxyalkylene group (a degree of polymerization of 2 to 4, an alkylene group is an ethylene group or an isopropyl group).
- Y is a linear or branched saturated or unsaturated divalent hydrocarbon group having 1 or more and 12 or less carbon atoms, and having 2 or more carbon atoms from the viewpoint of achieving both high specific conductivity and spark voltage. It is preferably 4 or more, more preferably 10 or less, even more preferably 8 or less, and may have an ether bond.
- Examples of Y include an ethylene group, a prolene group, an isopropylene group, a butylene group, an isobutylene group, a pentylene group, a hexylene group, a heptylene group, an octylene group, and one O [CH 2 CH 2 ] n-O- (where n is 1 to 5), a group represented by —0 [C 6 H 6 ] — 0—, a polyoxyalkylene group (polymerization degree: 2 to 4, an alkylene group being an ethylene group or an isopropylene group), and the like.
- particularly preferred are a hexylene group, a heptylene group, an octylene group and a polyoxyalkylene group.
- R 3 and R 4 are linear or branched saturated or unsaturated divalent hydrocarbon groups having 1 to 1 carbon atoms, and may have an ether bond.
- R 3 and R 4 may be the same or different.
- R 3 and R 4 are ethylene, propylene, isopropylene, butylene, isobutylene, pentylene, hexylene, heptylene, octylene, one [OCH 2 CH 2 ] n-(n Is a group represented by 1 to 4), a group represented by — [O CH 2 CH (CH 3 )] n-(n is ;! to 3), and the like.
- Particularly preferred are a hexylene group, a heptylene group and an octylene group.
- a 1 for example, a method described in The Journal of Organic Chemistry, 24, 54 (1959) can be used to obtain an ester of acrylic acid and hydrogen peroxide.
- a carboxylic acid ester having an ethylene oxide ring is reacted with a linear and / or branched saturated and Z or unsaturated diol having 1 to 10 carbon atoms which may have an ether bond.
- a method of obtaining by genogenization in a conventional manner, or by reacting P-toluenesulfonyl chloride with polyethylene glycol, and then reacting with 6 to 17 carbon atoms examples include a method of subjecting methyl polyethylene malonate methyl ester or ethyl ester to a nucleophilic addition reaction at a reaction temperature of 70 ° C. in the absence of a solvent, followed by saponification and decarboxylation in a conventional manner.
- 1,6-dichlorohexane is mixed with polyoxyethylene malonic acid methyl ester or ethyl ester having a polymerization degree of 1 to 4 at a reaction temperature of 70 ° C. And a nucleophilic addition reaction in the absence of a solvent, followed by saponification and decarboxylation by a conventional method.
- the carboxylic acid anion (A2) is prepared, for example, by reacting polyethylene glycol with P-toluenesulfonyl chloride, and then reacting the alkylmalonic acid methyl ester or ethyl ester having 6 to 17 carbon atoms with a reaction temperature of 70 ° C at a solvent-free temperature. It can also be obtained by a method involving nucleophilic substitution, saponification and decarboxylation in a conventional manner.
- Carboxylic acid (A O) is the corresponding protonated anion (A) with a proton added.
- Preferred as carboxylic acid (AO) are secondary dicarboxylic acids from the viewpoint of reactivity with solvent molecules and solvent solubility, and particularly preferred are secondary dicarboxylic acids having a hydrophilic group such as a hydroxyl group or an ether bond in the molecule. Dicarboxylic acid. Specifically, it is obtained by adding a proton to the compound represented by the general formula (1) (A1) and the compound represented by the general formula (2) (A2).
- Examples of the carboxylate (B) include an ammonium salt of a carboxylic acid (AO) and an amine salt.
- amines (bases) constituting amine salts include primary amines (methylamine, ethylamine, ethylenediamine, etc.), secondary amines (dimethylamine, getylamine, etc.), tertiary amines (trimethylamine, triethylamine, dimethylethylamine, Dimethylisopropylamine, 1,8-diazabicyclo (5,4,0) —pandene-17, etc.].
- preferred are ammonium salts and triethylamine salts, and particularly preferred are ammonium salts.
- the molar ratio of the carboxylate group (A) to the carboxylate (B) and the ammonium group is preferably (1: 2) to (1: 0.5), more preferably (1: 1.2) to (1: 0.8).
- organic polar solvent (C) used as the electrolytic solution for the electrolytic capacitor of the present invention one or two kinds of alcohols, ethers, amides, lactones, nitriles, carbonates and other organic polar solvents are used. The above is mentioned.
- organic polar solvent (C) examples include the following.
- Monohydric alcohol monohydric alcohol having 1 to 6 carbon atoms (methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, diacetone alcohol, furfuryl alcohol, etc.), monohydric alcohol having 7 or more carbon atoms (benzyl alcohol, Etc.),
- Dihydric alcohols dihydric alcohols having 1 to 6 carbon atoms (ethylene glycol, propylene glycol, diethylene glycol, hexylene glycol, etc.), dihydric alcohols having 7 or more carbon atoms (octylene glycol, etc.),
- Trihydric alcohols Trihydric alcohols having 1 to 6 carbon atoms (such as glycerin),
- Monoethers (Ethylene daricol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monophenyl ether, tetrahydrofuran, 3-methyltetrahydrofuran, etc.), diethers ( Ethylene glycol dimethyl ether, ethylene glycol dimethyl ether, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, etc.).
- Amides;-formamides N-methylformamide, N, N-dimethylformamide, N-ethylformamide, N, N-getylformamide, etc.
- acetoamides N-methylacetamide, N, N— Dimethylacetamide, N-ethylacetamide, N, N-getylacetamide, etc.
- propionamides N, N-dimethylpropionamide, hexamethylphosphorylamide, etc.
- oxazolidinones N-methyl) 2- (oxazolidinone, 3,5-dimethyl-2-oxazolidinone, etc.).
- dihydric alcohols having 1 to 6 carbon atoms ethylene glycol, propylene glycol, diethylene glycol, hexylene glycol, etc.
- ethylene glycol is even more preferred.
- the weight of the organic polar solvent (C) is preferably 5 to 95% by weight, more preferably 30 to 95% by weight, and more preferably 60 to 95% by weight, based on the total weight of the electrolytic solution. % Is most preferred.
- a non-polar solvent such as an aromatic solvent (C) may be added to the organic polar solvent (C).
- C aromatic solvent
- a paraffin solvent normal paraffin, isoparaffin or the like can be used in combination.
- the content of the nonpolar solvent is preferably 20% by weight or less based on the total weight of the electrolytic solution.
- the electrolytic solution for the electrolytic capacitor can contain water as required. Its content is 10% by weight or less based on the total weight of the electrolyte.
- ionic compound (D) of the dicarboxylic acid anion (A) and the aluminum ion those represented by the following general formulas (3) and (4) are particularly preferable.
- the ionic compound (D) is a virtual compound for calculating the energy of its formation in water.
- the carboxylic acid (AO) and / or carboxylate (B) dissolved in the organic polar solvent (C) reacts with aluminum in an electrolytic capacitor to form an ionic bond (D) with aluminum ions. It is considered that there is.
- the total weight of carboxylic acid (AO) and / or carboxylate (B) is It is preferably from 1 to 70% by weight, more preferably from 5 to 40% by weight, based on the total weight of the liquid.
- the additive examples include a phosphoric acid derivative (for example, phosphoric acid, a phosphate ester, etc.), a boric acid derivative (for example, boric acid, a complex compound of boric acid and a polysaccharide [mannite, sorbite, etc.], borate).
- a phosphoric acid derivative for example, phosphoric acid, a phosphate ester, etc.
- a boric acid derivative for example, boric acid, a complex compound of boric acid and a polysaccharide [mannite, sorbite, etc.], borate.
- Complex compounds of acids and polyhydric alcohols such as ethylene glycol and glycerin
- nitro compounds eg, o-nitrobenzoic acid, p-nitrobenzoic acid, m-nitrobenzoic acid, o-ditrophenol, p-) Nitrophenol).
- a small amount of a carboxylic acid having a primary propyloxyl group, a carboxylic acid having an aromatic lipoxyl group, or the like can be mixed for the purpose of improving the chemical conversion property and further improving the specific conductivity.
- Mixtures include adipic acid, azelineic acid, 1,6-decanedicarboxylic acid, 2-butylhexandioic acid, and benzoic acid.
- the total amount of the above additives is preferably 10% by weight or less based on the total weight of the carboxylic acid (A 2 O 3) and the carboxylate (B).
- the pH of the electrolytic solution of the present invention is preferably from 3 to 12, more preferably from 5 to 10.
- the pH of the electrolytic solution is an analytical value of the undiluted electrolytic solution at 25 ° C.
- the electrolytic solution according to the present invention is used for an electrolytic capacitor, and is preferably used for an electrolytic capacitor for medium and high pressure classes having a spark voltage of 100 V or more.
- Example 2 76 g of 1,3-propanediol was used in place of 1,6-hexanediol in Example 1, and the amount of ethylene oxide dropped was 13.5.9 (3.09 mo 1).
- the same procedure as in Example 1 was carried out except that the dropping time of tylene oxide was changed to 12 hours, to obtain 160.3 g of a dicarboxylic acid (A0-2) represented by the following formula. Dissolve the obtained (AO-2) 18.18 g (0.05mo 1) in 80 g of ethylene glycol, purge with ammonia gas, stop purging when neutral, and remove dicarboxylic acid. An acid ammonium salt solution (B_2) 100 g was obtained.
- A0-2 dicarboxylic acid
- a 3 L four-necked flask was charged with 93.2 g (lmol) of tetraethylene dalicol and 900 ml of dry pyridine, and the solution obtained by dissolving p-toluenesulfonyl chloride in 600 ml of dry toluene was stirred. The solution was added dropwise while maintaining the temperature of the contents of the flask at 10 ° C or lower, then reacted for 4 hours, and aged at room temperature for 12 hours.
- reaction product was extracted with toluene, and the extract was washed with 1N hydrochloric acid, then with 10% aqueous sodium hydroxide and an aqueous solution of lime, and then topped with toluene to give 300 g of the following formula (E-12). Got.
- the reaction product was extracted with ethyl ether, treated with 10 N potassium hydroxide and then with 6 N hydrochloric acid, and the ethyl ether was topped to obtain a tetracarboxylic acid.
- the obtained tetracarbonic acid was dissolved in pyridine, and decarboxylated under heating under reflux to obtain dicarponic acid (A 0-3) represented by the following formula.
- the obtained (AO-3) 18.33 g (0.05 mol) was dissolved in 80 g of ethylene glycol, purged with ammonia gas, and purged when neutrality was reached.
- An acid ammonium salt solution (B-3) 100 was obtained.
- the obtained tetracarboxylic acid was dissolved in pyridine and decarboxylated under heating and reflux to obtain dicarponic acid (A 0-5) represented by the following formula.
- the obtained (AO-5) 18.43 (0.05 mol) was dissolved in 80 g of ethylene glycol, and ammonia gas was purged. When the mixture became neutral, the purge was stopped and ammonium dicarboxylate was removed. Solution (B-5) ; 100 was obtained.
- Tosylation product of diethylene glycol monomethyl ether (E-3) [shown by the following formula (E-3)] was synthesized by insitu.
- E-3 diethylene glycol monomethyl ether
- heat and stir a mixture of 61.06 g of getyl malonate and 1500.2 g of a 20% sodium ethoxide ethanol solution, and add the toluene (E-3) to the mixture.
- the solution was added dropwise.
- the reaction was carried out for 9 hours under reflux with heating, the reaction product was extracted with ethyl acetate, and after removal of the solvent, a getyl malonate derivative (E-4) represented by the following formula was obtained.
- the obtained tetracarboxylic acid was dissolved in pyridine and decarboxylated under heating and refluxing to obtain a dicarboxylic acid (A0-6) represented by the following formula.
- the obtained (A0-6) 18.45 g ( 0.05mo 1) was dissolved in 80 g of ethylene glycol, and ammonia gas was purged. When the mixture became neutral, the purging was stopped to obtain 100 g of an ammonium dicarboxylate salt solution (B-6).
- A0-6 dicarboxylic acid represented by the following formula.
- the obtained (A0-6) 18.45 g ( 0.05mo 1) was dissolved in 80 g of ethylene glycol, and ammonia gas was purged. When the mixture became neutral, the purging was stopped to obtain 100 g of an ammonium dicarboxylate salt solution (B-6).
- B-6 ammonium dicarboxylate salt solution
- Tosylate (E-5) [shown by the following formula (E-5)] of diethylenedalicol monophenyl ether was synthesized in situ.
- a mixture of 60.6 g of getyl malonate and 1500.2 g of a 20% sodium ethoxide ethanol solution was heated and stirred, and the above mixture (E-5) was added to the mixture.
- the reaction was carried out for 9 hours under reflux with heating, the reaction product was extracted with ethyl acetate, and after removing the solvent, a getyl malonate derivative (E-6) represented by the following formula was obtained.
- the obtained tetracarboxylic acid was dissolved in pyridine and decarboxylated under heating and reflux to obtain dicarboxylic acid (A0-7) represented by the following formula in Example 7.
- the obtained (A 0—7) 18.87 (0.04 mo 1) was dissolved in 80 g of ethylene glycol, purged with ammonia gas, and stopped when neutralized. 100 g of ammonium dicarboxylate solution (B-7) was obtained.
- the obtained tetracarboxylic acid was dissolved in pyridine and decarboxylated under heating under reflux to obtain 2,9_dimethylsebacic acid (AO-9 ') represented by the following formula.
- the obtained 2,9-dimethylsebacic acid (AO-9 ') 17.42 (0.08mo1) was dissolved in 80g of ethylene glycol, and ammonia gas was purged to make it neutral. At this point, the purging was stopped, and 100 g of ammonium dicarboxylate (B-9 ′) solution was obtained.
- Soluble parameters of carboxylic acid anion (A) calculated by the Fedors method Table 1 shows the solubility parameters of the organic solvent and the organic polar solvent (C), and the absolute values of the differences between them.
- Table 1 shows the maximum value of the highest occupied orbital electron density in the molecule of the sulfonic acid anion (A) calculated by the MM 3 ZF M 3 method of the CA Che system.
- Table 1 shows the formation energies of the ionic compound (D) between the carboxylic acid anion (A) and the aluminum ion, calculated by the MM 3 ZPM 3 method of the CAChe system.
- Specific conductivity Specific conductivity at 30 ° C was measured using a conductivity meter CM-40S manufactured by Toa Denpa Kogyo Co., Ltd.
- Example 1 230.6.12.8 17.25.0 0.16 -393.Example 2 193.5 13.5 17.8 4.3 0.17 -434.Example 3 278.2 10.0 17.8 7.80. 32 -273.Example 4 264.9 9.6 17.8 8.2 0.08 -262.Example 5 286.8 11.7 17.8 6.10.13 -302.Example 6 274 6 10. 0 17. 8 7. 8 0. 16 -264. Example 7 262. 8 10. 6 17. 8 7.2 0. 16 -305. Comparative Example 1 228. 9 10. 1 17.8 7.70.11 -216.Comparative Example 2154.5 10.5 17.8 7.30.04 -184.
- the electrolytic solution for an electrolytic capacitor of the present invention generates a higher spark voltage without lowering the specific conductivity. Since it can save space and increase the reliability of capacitors, it has great industrial value.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/525,237 US20060003231A1 (en) | 2002-08-22 | 2003-08-19 | Electrolytic solution |
EP03792722A EP1544877A1 (en) | 2002-08-22 | 2003-08-19 | Electrolytic solution |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2002241288 | 2002-08-22 | ||
JP2002-241288 | 2002-08-22 | ||
JP2003-199716 | 2003-07-22 | ||
JP2003199716 | 2003-07-22 |
Publications (1)
Publication Number | Publication Date |
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WO2004019355A1 true WO2004019355A1 (ja) | 2004-03-04 |
Family
ID=31949558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/010475 WO2004019355A1 (ja) | 2002-08-22 | 2003-08-19 | 電解液 |
Country Status (3)
Country | Link |
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US (1) | US20060003231A1 (ja) |
EP (1) | EP1544877A1 (ja) |
WO (1) | WO2004019355A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01103821A (ja) * | 1987-07-10 | 1989-04-20 | Matsushita Electric Ind Co Ltd | 電解コンデンサ駆動用電解液 |
JPH0684705A (ja) * | 1992-09-03 | 1994-03-25 | Sanyo Chem Ind Ltd | 電解コンデンサ駆動用電解液およびそれを用いた電解コンデンサ |
JPH06302475A (ja) * | 1993-04-09 | 1994-10-28 | Sanyo Chem Ind Ltd | 電解コンデンサ駆動用電解液 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5071521A (en) * | 1989-09-06 | 1991-12-10 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing a solid electrolytic capacitor |
KR19980702606A (ko) * | 1995-03-06 | 1998-08-05 | 무네유키 가코우 | 비수성 이차전지 |
US5853794A (en) * | 1997-10-31 | 1998-12-29 | Kemet Electronics Corp. | Doped polyaniline solutions |
-
2003
- 2003-08-19 US US10/525,237 patent/US20060003231A1/en not_active Abandoned
- 2003-08-19 EP EP03792722A patent/EP1544877A1/en not_active Withdrawn
- 2003-08-19 WO PCT/JP2003/010475 patent/WO2004019355A1/ja not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01103821A (ja) * | 1987-07-10 | 1989-04-20 | Matsushita Electric Ind Co Ltd | 電解コンデンサ駆動用電解液 |
JPH0684705A (ja) * | 1992-09-03 | 1994-03-25 | Sanyo Chem Ind Ltd | 電解コンデンサ駆動用電解液およびそれを用いた電解コンデンサ |
JPH06302475A (ja) * | 1993-04-09 | 1994-10-28 | Sanyo Chem Ind Ltd | 電解コンデンサ駆動用電解液 |
Also Published As
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EP1544877A1 (en) | 2005-06-22 |
US20060003231A1 (en) | 2006-01-05 |
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