CN115116751B - Aluminum electrolytic capacitor electrolyte, preparation method thereof and aluminum electrolytic capacitor - Google Patents
Aluminum electrolytic capacitor electrolyte, preparation method thereof and aluminum electrolytic capacitor Download PDFInfo
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Abstract
The invention discloses an electrolyte of an aluminum electrolytic capacitor, which comprises the following components in parts by weight: 40-60 parts of main solvent, 8-20 parts of auxiliary solvent, 15-25 parts of main solute, 5-10 parts of auxiliary solute and 1-4 parts of additive; the preparation method of the electrolyte specifically comprises the following steps: heating the main solvent to 80-90 ℃, adding the auxiliary solvent, mixing, heating to 130-140 ℃, adding the main solute and the auxiliary solute, stirring while keeping the temperature, then cooling to 120-125 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring while keeping the temperature, cooling to 100-105 ℃, finally adding the hydrogen scavenger, stirring while keeping the temperature, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor; the main solute is the binary hydroxyl dicarboxylic ammonium salt containing symmetrical hydroxyl groups, so that the solubility of the binary hydroxyl dicarboxylic ammonium salt in a solvent is greatly improved, the solute cannot be separated out from the prepared electrolyte at low temperature, the low-temperature working requirement of an electrolytic capacitor can be met, and the prepared aluminum electrolytic capacitor can have a wider application temperature range.
Description
Technical Field
The invention belongs to the technical field of capacitors, relates to an electrolyte, and particularly relates to an aluminum electrolytic capacitor electrolyte, a preparation method thereof and an aluminum electrolytic capacitor.
Background
The physical and chemical properties of the aluminum electrolytic capacitor determine the basic functions of the electrolytic capacitor. The anode foil of the electrolytic capacitor is a main electron storage material, and under the insulation protection of the oxide film dielectric layer, the movement speed of ions carrying electrons in the cathode electrolyte determines the physical parameters of the electrolytic capacitor; the aluminum electrolytic capacitor is characterized in that a layer of extremely thin oxidation film medium is formed on the surface of an anode foil in an electrolytic mode, the extremely thin oxidation film medium, non-conductive electrolytic paper and a cathode foil are sequentially wound to form a core package, organic electrolyte is impregnated, an outer aluminum shell is arranged, an aluminum lead is arranged at the upper end of a shell cover plate, and finally packaging and sleeving are carried out to form the capacitor.
The electrolyte of the aluminum electrolytic capacitor provides oxygen anions and electrons in the electrolytic capacitor, and is used for repairing an anode foil oxide film and conducting electrons in the capacitor. The electrolyte of the aluminum electrolytic capacitor mainly comprises a solvent, an organic solute and an additive; the solvent is used as the main part of the electrolyte and is mainly used for dissolving electrolyte solutes, additives and other substances. The electrolyte requires the solvent mainly because the melting point and the boiling point of the solvent have a certain temperature range, and particularly in the high-temperature condition, the solvent has larger fluidity and smaller vapor pressure. The solute is used as the core part of the electrolyte and mainly plays a role in improving the conductivity of the electrolyte, and the electrolyte is generally a binary or polybasic carboxylic acid containing carboxyl or hydroxyl or an ammonium carboxylate. The main reason for selecting ammonium salt is that the pH of the electrolyte is generally required to be neutral or slightly acidic, sodium salt and potassium salt have strong oxidizability and belong to strong alkalis, and on the other hand, sodium salt and potassium salt ions are small and are easy to chemically react with holes of an anode foil to reduce the chemical stability of an anode oxide film, so ammonia gas is the main pH adjusting gas. The additive is a property modifier for the electrolyte. The electrolyte composed of the solvent and the solute meets the requirement of electrolyte testing parameters. However, in the actual use process, the requirements of the capacitor such as the sparking voltage value of the electrolyte, the oxidation efficiency, the consistency with the anode foil and the like are far from being met. The electrolyte additive comprises a sparking voltage improver, a preservative, a hydrogen scavenger, a stabilizer and the like.
Disclosure of Invention
The invention aims to provide an aluminum electrolytic capacitor electrolyte, a preparation method thereof and an aluminum electrolytic capacitor.
The purpose of the invention can be realized by the following technical scheme:
the electrolyte of the aluminum electrolytic capacitor comprises the following components in parts by weight: 40-60 parts of main solvent, 8-20 parts of auxiliary solvent, 15-25 parts of main solute, 5-10 parts of auxiliary solute and 1-4 parts of additive; the main solute is dibasic hydroxyl dicarboxylic acid ammonium salt, and the structural formula is as follows:
further, the main solvent is ethylene glycol.
Further, the auxiliary solvent is one or a combination of glycerol, gamma-butyrolactone and DMF.
Furthermore, the auxiliary solute is one or a combination of ammonium hydrogen azelate and ammonium sebacate.
Further, the additives comprise a flash voltage enhancer, a hydrogen scavenger and a hydration-resistant aid.
Further, the sparking voltage enhancer is one or a combination of boric acid, tartaric acid, citric acid and ammonium phosphite; the hydrogen eliminating agent is one of p-nitrobenzoic acid, p-nitrophenol, p-nitrobenzyl alcohol and m-nitroacetophenone; the waterproof auxiliary agent is one or a combination of more of phosphoric acid, hypophosphorous acid, mannitol and polypropylene glycol;
the sparking voltage improver accounts for 70-95% of the total weight of the additive;
the hydrogen eliminating agent accounts for 0.5 to 5 percent of the total weight of the additive;
the waterproof auxiliary agent accounts for 0.5-5% of the total weight of the additive.
Further, the preparation method of the binary hydroxyl dicarboxylic acid ammonium salt specifically comprises the following steps:
the first step is as follows: preparation of dihydroxy dicarboxylic acids
Weighing 0.30g of 2, 6-diphenylmethylene cyclohexanone, 0.40g of DL-4-hydroxy-2-ketoglutarate, 70-100mg of catalyst 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazole bromide and 50mg of phase transfer catalyst methyl trioctyl ammonium chloride, adding the mixture into a three-neck flask containing a nitrogen device and a reflux device, then adding 300-500ml of organic solvent 1, 4-dioxane and 50-60ml of triethylamine, introducing nitrogen to replace air in the flask, heating to 90-95 ℃ while stirring, carrying out a Stetter reaction for 6-8h, separating out a water phase after the reaction is finished, adjusting the pH of the water phase to 2.5-3.0 by adopting a 10-15% sulfuric acid aqueous solution, standing for 15-20min, adding 100-150ml of ethyl acetate for extraction, removing the solvent by rotary evaporation of an extraction liquid, and drying the product in a vacuum drying oven at 45-50 ℃ for 8-10h to obtain the binary hydroxy dicarboxylic acid; the catalyst 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazolium bromide has the following structural formula:
the second step is that: weighing 0.1g of the binary hydroxy dicarboxylic acid prepared in the first step, adding the binary hydroxy dicarboxylic acid into 40-50ml of absolute ethyl alcohol, stirring and dissolving completely, introducing ammonia gas, monitoring the change of the pH value of the solution in real time, stopping introducing the ammonia gas when the pH value keeps alkalescence within 5min, placing the solution in a refrigerator overnight, filtering, and drying in a vacuum drying oven at 45-50 ℃ for 8-10h to obtain the binary hydroxy dicarboxylic acid ammonium salt.
Further, the alkalescence is that the pH value is 7.2-8.0.
A preparation method of an aluminum electrolytic capacitor electrolyte comprises the steps of heating a main solvent to 80-90 ℃, adding an auxiliary solvent, mixing, heating to 130-140 ℃, adding a main solute and an auxiliary solute, stirring for 30-45min under heat preservation, then cooling to 120-125 ℃, adding a flash fire voltage improver and a waterproof auxiliary agent, stirring for 30-45min under heat preservation, cooling to 100-105 ℃, finally adding a hydrogen scavenger, stirring for 30-45min under heat preservation, and naturally cooling to room temperature to obtain the aluminum electrolytic capacitor electrolyte.
An aluminum electrolytic capacitor comprises an aluminum electrolytic capacitor electrolyte, and the aluminum electrolytic capacitor electrolyte is prepared by the preparation method.
The invention has the beneficial effects that:
the electrolyte of the aluminum electrolytic capacitor prepared by the invention has higher sparking voltage and better temperature stability, the prepared binary hydroxy dicarboxylic acid ammonium salt has good solubility in a main solvent, and is difficult to separate out at low temperature.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a mass spectrum of a dibasic hydroxy dicarboxylic acid of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the binary hydroxyl dicarboxylic acid ammonium salt comprises the following steps:
the first step is as follows: preparation of dihydroxy dicarboxylic acids
0.30g of 2, 6-diphenylmethylene cyclohexanone, 0.40g of DL-4-hydroxy-2-ketoglutarate, 100mg of catalyst 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazolium bromide (structural formula of catalyst is as follows:
) 50mg of methyltrioctylammonium chloride as a phase transfer catalyst were introduced into a three-necked flask containing a nitrogen apparatus and a reflux apparatus, followed by 400ml of a solution containingIntroducing nitrogen to replace air in a flask, heating to 90 ℃ while stirring, carrying out Stetter reaction for 8 hours, separating out a water phase after the reaction is finished, adjusting the pH of the water phase to 2.5-3.0 by adopting a 15% sulfuric acid aqueous solution, standing for 15 minutes, adding 150ml ethyl acetate for extraction, removing the solvent from an extract through rotary evaporation, and drying the product in a vacuum drying oven at 50 ℃ for 10 hours to obtain the binary hydroxy dicarboxylic acid; shown in FIG. 1 is a mass spectrum of the dihydroxy dicarboxylic acid, MS (C28H 30O 9): m/z =510.12380.
The second step is that: weighing 0.1g of the binary hydroxy dicarboxylic acid prepared in the first step, adding the binary hydroxy dicarboxylic acid into 50ml of absolute ethyl alcohol, stirring and dissolving completely, introducing ammonia gas, monitoring the change of the pH value of the solution in real time, stopping introducing the ammonia gas when the pH value is kept between 7.2 and 8.0 within 5min, placing the solution in a refrigerator overnight, filtering, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the binary hydroxy dicarboxylic acid ammonium salt.
Solubility test of ammonium salt of dibasic hydroxy dicarboxylic acid: at room temperature, dissolving binary hydroxyl dicarboxylic acid ammonium salt in 100ml of glycol solution until solute can not be completely dissolved, wherein the concentration is the upper limit of dissolution; the maximum dissolved ethylene glycol concentration of the dibasic hydroxy dicarboxylic acid ammonium salt was measured to be 42.6% (mass concentration).
Example 2
Electrolyte of the aluminum electrolytic capacitor: 50g of ethylene glycol as the main solvent, 10g of gamma-butyrolactone and 5g of DMF as the auxiliary solvent, 18g of the dibasic ammonium hydroxy dicarboxylate salt as the main solute (prepared in example 1), 6g of the ammonium sebacate as the auxiliary solute, and additives (3 g of boric acid, 0.6g of citric acid, 0.1g of p-nitrobenzoic acid, 0.02g of phosphoric acid, 0.02g of hypophosphorous acid, 0.03g of mannitol);
heating the main solvent to 90 ℃, adding the auxiliary solvent, heating to 140 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 30min under heat preservation, then cooling to 120 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 30min under heat preservation, cooling to 100 ℃, finally adding the hydrogen scavenger, stirring for 30min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai Lei magnetic DDSJ-308F desk type conductivity meter is 2.28ms/cm, and the average flashover voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 491V.
Example 3 electrolyte for aluminum electrolytic capacitor: 55g of ethylene glycol as a main solvent, 8g of glycerol and 5g of DMF as an auxiliary solvent, 20g of ammonium dihydroxydicarboxylate (prepared in example 1) as a main solute, 10g of ammonium azelate as an auxiliary solute, and additives (3.5 g of boric acid, 0.7g of citric acid, 0.2g of p-nitrophenol, 0.04g of phosphoric acid, 0.1g of hypophosphorous acid, 0.03g of polyallylic alcohol);
heating the main solvent to 85 ℃, adding the auxiliary solvent, heating to 135 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 30min under heat preservation, then cooling to 125 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 30min under heat preservation, cooling to 105 ℃, finally adding the hydrogen scavenger, stirring for 45min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai Lei magnetic DDSJ-308F desk type conductivity meter is 2.24ms/cm, and the average flashover voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 498V.
Example 4
Electrolyte of the aluminum electrolytic capacitor: 60g of ethylene glycol as a main solvent, 10g of glycerol and 5g of DMF as an auxiliary solvent, 25g of ammonium dihydroxydicarboxylate (prepared in example 1) as a main solute, 8g of ammonium hydrogenazelate as an auxiliary solute, 0.1g of boric acid, 0.1g of tartaric acid, 0.1g of ammonium phosphite, 0.15g of m-nitroacetophenone, 0.06g of phosphoric acid, 0.03g of mannitol, 0.05g of polypropylene glycol;
heating the main solvent to 90 ℃, adding the auxiliary solvent, heating to 140 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 45min under heat preservation, then cooling to 125 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 30min under heat preservation, cooling to 100 ℃, finally adding the hydrogen scavenger, stirring for 30min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai thunder magnetic DDSJ-308F desk type conductivity meter is 2.28ms/cm, and the average sparking voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 495V.
Example 5
Electrolyte of the aluminum electrolytic capacitor: 40g of ethylene glycol as a main solvent, 15g of glycerol and 5g of DMF as an auxiliary solvent, 20g of ammonium dihydroxydicarboxylate (prepared in example 1) as a main solute, 3g of ammonium hydrogen azelate and 3g of ammonium sebacate as an auxiliary solute, and additives (2.7 g of boric acid, 0.8g of citric acid, 0.8g of ammonium phosphite, 0.18g of p-nitrobenzyl alcohol, 0.06g of phosphoric acid, 0.04g of phosphorous acid, 0.06g of polypropylene glycol);
heating the main solvent to 85 ℃, adding the auxiliary solvent, heating to 130 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 45min under heat preservation, then cooling to 120 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 45min under heat preservation, cooling to 105 ℃, finally adding the hydrogen scavenger, stirring for 40min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai Lei magnetic DDSJ-308F desk type conductivity meter is 2.26ms/cm, and the average flashover voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 496V.
Comparative example 1
Electrolyte of the aluminum electrolytic capacitor: 40g of ethylene glycol as a main solvent, 15g of glycerol and 5g of DMF as an auxiliary solvent, 10g of ammonium salt of dibasic hydroxydicarboxylic acid as a main solute (prepared in example 1), 10g of ammonium hydrogen azelate and 10g of ammonium sebacate as auxiliary solutes, and additives (2.7 g of boric acid, 0.8g of citric acid, 0.8g of ammonium phosphite, 0.18g of p-nitrobenzyl alcohol, 0.06g of phosphoric acid, 0.04g of phosphorous acid, 0.06g of polypropylene glycol);
heating the main solvent to 85 ℃, adding the auxiliary solvent, heating to 130 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 45min under heat preservation, then cooling to 120 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 45min under heat preservation, cooling to 105 ℃, finally adding the hydrogen scavenger, stirring for 40min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai Lei magnetic DDSJ-308F desk type conductivity meter is 2.08ms/cm, and the average flashover voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 485V.
Comparative example 2
Electrolyte of the aluminum electrolytic capacitor: 40g of ethylene glycol as a main solvent, 15g of glycerol and 5g of DMF as an auxiliary solvent, 20g of ammonium dihydroxy dicarboxylate (prepared in example 1) as a main solute, 10g of ammonium sebacate as an auxiliary solute, additives (2.7 g of boric acid, 0.8g of citric acid, 0.8g of ammonium phosphite, 0.18g of p-nitrobenzyl alcohol, 0.06g of phosphoric acid, 0.04g of phosphorous acid, 0.06g of polyallylamine);
heating the main solvent to 85 ℃, adding the auxiliary solvent, heating to 130 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 45min under heat preservation, then cooling to 120 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 45min under heat preservation, cooling to 105 ℃, finally adding the hydrogen scavenger, stirring for 40min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor. The conductivity of the prepared electrolyte measured by a Shanghai Lei magnetic DDSJ-308F desk type conductivity meter is 1.85ms/cm, and the average flashover voltage value of the prepared electrolyte measured by a Yangzhou Baohou TV-1CH type intelligent TV tester is 457V.
Low temperature resistance test
The electrolytes prepared in examples 2 to 5 and comparative examples 1 to 2 were each placed in an environment at a temperature of-25 ℃ and left to stand for 24 hours, and then the state of each electrolyte was observed.
As can be seen from the table above, the electrolyte prepared by the method has good low-temperature resistance, can meet the low-temperature working requirement of the electrolytic capacitor, and can be prepared into the aluminum electrolytic capacitor with a wider use temperature range.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (10)
1. The electrolyte of the aluminum electrolytic capacitor is characterized by comprising the following components in parts by weight: 40-60 parts of main solvent, 8-20 parts of auxiliary solvent, 15-25 parts of main solute, 5-10 parts of auxiliary solute and 1-4 parts of additive; the main solute is binary hydroxyl dicarboxylic acid ammonium salt, and the structural formula is as follows:
2. the electrolyte for aluminum electrolytic capacitors as recited in claim 1, wherein the primary solvent is ethylene glycol.
3. The aluminum electrolytic capacitor electrolyte as recited in claim 1, wherein the auxiliary solvent is one or more of glycerol, γ -butyrolactone, and DMF.
4. The electrolyte of claim 1, wherein the auxiliary solute is one or more selected from the group consisting of ammonium hydrogen azelate and ammonium sebacate.
5. The aluminum electrolytic capacitor electrolyte of claim 1, wherein the additives comprise a sparking voltage enhancer, a hydrogen scavenger and a water proofing additive.
6. The electrolyte of an aluminum electrolytic capacitor according to claim 5, wherein the sparking voltage enhancer is one or more of boric acid, tartaric acid, citric acid, ammonium phosphite; the hydrogen eliminating agent is one of p-nitrobenzoic acid, p-nitrophenol, p-nitrobenzyl alcohol and m-nitroacetophenone; the waterproof co-agent is one or a combination of more of phosphoric acid, hypophosphorous acid, mannitol and polypropylene glycol;
the sparking voltage improver accounts for 70-95% of the total weight of the additive;
the hydrogen eliminating agent accounts for 0.5 to 5 percent of the total weight of the additive;
the waterproof auxiliary agent accounts for 0.5-5% of the total weight of the additive.
7. The electrolyte for the aluminum electrolytic capacitor according to claim 1, wherein the preparation method of the binary hydroxy dicarboxylic acid ammonium salt specifically comprises the following steps:
the first step is as follows: preparation of dihydroxy dicarboxylic acids
Weighing 0.27-0.30g of 2, 6-diphenylmethylene cyclohexanone, 0.38-0.42g of DL-4-hydroxy-2-ketoglutarate, 70-100mg of catalyst 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazole bromide and 50-60mg of phase transfer catalyst methyl trioctyl ammonium chloride, adding the mixture into a three-neck flask containing a nitrogen device and a reflux device, adding 300-500ml of organic solvent 1, 4-dioxane and 50-60ml of triethylamine, introducing nitrogen to replace air in the flask, heating to 90-95 ℃ while stirring, carrying out Stetter reaction for 6-8h, separating out an aqueous phase after the reaction is finished, adjusting the pH of the aqueous phase to 2.5-3.0 by adopting 10-15% sulfuric acid aqueous solution, standing for 15-20min, adding 100-150ml of ethyl acetate for extraction, removing the solvent from an extract through rotary evaporation, drying the product in a vacuum drying box at 45-50 ℃ for 8-10h to obtain the binary hydroxy dicarboxylic acid;
the catalyst 3-ethyl-5- (2-hydroxyethyl) -4-methylthiazolium bromide has the following structural formula:
；
the second step is that: weighing 0.1g of the binary hydroxy dicarboxylic acid prepared in the first step, adding the binary hydroxy dicarboxylic acid into 40-50ml of absolute ethyl alcohol, stirring and dissolving completely, introducing ammonia gas, monitoring the change of the pH value of the solution in real time, stopping introducing the ammonia gas when the pH value keeps alkalescence within 5min, placing the solution in a refrigerator overnight, filtering, and drying in a vacuum drying oven at 45-50 ℃ for 8-10h to obtain the binary hydroxy dicarboxylic acid ammonium salt.
8. The electrolyte for aluminum electrolytic capacitors as claimed in claim 7, wherein the weak alkalinity is a pH of 7.2 to 8.0.
9. The method for preparing the electrolyte of the aluminum electrolytic capacitor according to any one of claims 1 to 8, comprising the following steps: heating the main solvent to 80-90 ℃, adding the auxiliary solvent, heating to 130-140 ℃ after mixing, adding the main solute and the auxiliary solute, stirring for 30-45min under heat preservation, then cooling to 120-125 ℃, adding the flash voltage improver and the waterproof auxiliary agent, stirring for 30-45min under heat preservation, cooling to 100-105 ℃, finally adding the hydrogen scavenger, stirring for 30-45min under heat preservation, and naturally cooling to room temperature to obtain the electrolyte of the aluminum electrolytic capacitor.
10. An aluminum electrolytic capacitor comprising an aluminum electrolytic capacitor electrolyte prepared by the method of claim 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2041646A (en) * | 1979-02-02 | 1980-09-10 | Pye Ltd | Electrolytic capacitors |
| CN101206955A (en) * | 2007-12-14 | 2008-06-25 | 广州市二轻工业科学技术研究所 | Branched chain polybasic carboxylic acid ammonium salt mixture as well as preparation method and application thereof |
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| JP2002043182A (en) * | 2001-06-26 | 2002-02-08 | Mitsubishi Chemicals Corp | Electrolyte for electrolytic capacitor, and electrolytic capacitor using the same |
| JP2004221557A (en) * | 2002-12-25 | 2004-08-05 | Sanyo Chem Ind Ltd | Electrolyte |
| CN106384671B (en) * | 2016-10-21 | 2018-09-21 | 新疆众和股份有限公司 | A kind of mixed acid electrolyte |
| CN112837939A (en) * | 2021-01-07 | 2021-05-25 | 深圳中元电子有限公司 | High-temperature-resistant high-voltage electrolyte and aluminum electrolytic capacitor using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2041646A (en) * | 1979-02-02 | 1980-09-10 | Pye Ltd | Electrolytic capacitors |
| CN101206955A (en) * | 2007-12-14 | 2008-06-25 | 广州市二轻工业科学技术研究所 | Branched chain polybasic carboxylic acid ammonium salt mixture as well as preparation method and application thereof |
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