CN112420393B - High-voltage-resistant electrolyte and aluminum electrolytic capacitor - Google Patents
High-voltage-resistant electrolyte and aluminum electrolytic capacitor Download PDFInfo
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- CN112420393B CN112420393B CN202011283139.3A CN202011283139A CN112420393B CN 112420393 B CN112420393 B CN 112420393B CN 202011283139 A CN202011283139 A CN 202011283139A CN 112420393 B CN112420393 B CN 112420393B
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- electrolyte
- electrolytic capacitor
- aluminum electrolytic
- pressure resistant
- resistant electrolyte
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 46
- 239000003990 capacitor Substances 0.000 title claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 21
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 31
- -1 polyoxy Polymers 0.000 claims abstract description 20
- 229920001515 polyalkylene glycol Polymers 0.000 claims abstract description 16
- 229920000223 polyglycerol Polymers 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 9
- 125000002947 alkylene group Chemical group 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 150000002170 ethers Chemical class 0.000 claims abstract 2
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 6
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 6
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims description 5
- DOKHEARVIDLSFF-UHFFFAOYSA-N prop-1-en-1-ol Chemical group CC=CO DOKHEARVIDLSFF-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011888 foil Substances 0.000 description 5
- BQNDPALRJDCXOY-UHFFFAOYSA-N 2,3-dibutylbutanedioic acid Chemical compound CCCCC(C(O)=O)C(C(O)=O)CCCC BQNDPALRJDCXOY-UHFFFAOYSA-N 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- 239000004327 boric acid Substances 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- AGNTUZCMJBTHOG-UHFFFAOYSA-N 3-[3-(2,3-dihydroxypropoxy)-2-hydroxypropoxy]propane-1,2-diol Chemical compound OCC(O)COCC(O)COCC(O)CO AGNTUZCMJBTHOG-UHFFFAOYSA-N 0.000 description 1
- WOKDXPHSIQRTJF-UHFFFAOYSA-N 3-[3-[3-[3-[3-[3-[3-[3-[3-(2,3-dihydroxypropoxy)-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]-2-hydroxypropoxy]propane-1,2-diol Chemical compound OCC(O)COCC(O)COCC(O)COCC(O)COCC(O)COCC(O)COCC(O)COCC(O)COCC(O)COCC(O)CO WOKDXPHSIQRTJF-UHFFFAOYSA-N 0.000 description 1
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940105990 diglycerin Drugs 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- JYKSTGLAIMQDRA-UHFFFAOYSA-N tetraglycerol Chemical compound OCC(O)CO.OCC(O)CO.OCC(O)CO.OCC(O)CO JYKSTGLAIMQDRA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A high-voltage resistant electrolyte and an aluminum electrolytic capacitor. A high pressure resistant electrolyte includes a solvent, a solute and a performance additive; the performance additives include polyoxyalkylene polyglyceryl ethers. In the invention, the electrolyte is added with the polyoxy alkylene polyglycerol ether, the withstand voltage of the aluminum electrolytic capacitor is increased, and the addition of the polyalkylene glycol can reduce the leakage current of the aluminum electrolytic capacitor.
Description
Technical Field
The invention relates to an aluminum electrolytic capacitor, in particular to electrolyte of a high-voltage-resistant aluminum electrolytic capacitor.
Background
An anode foil of an aluminum electrolytic capacitor has an insulating dielectric, that is, an oxide film of the anode foil formed on the surface thereof. The anode foil, the electrolytic paper and the cathode foil are wound together to form a core package, then the core package is impregnated with electrolyte and placed into a shell for packaging to form the aluminum electrolytic capacitor.
It is known that the properties of the electrolyte have a great influence on the properties of the capacitor. In general, an electrolytic solution for medium-high voltage aluminum electrolytic capacitors is prepared by dissolving boric acid or its ammonium salt and a polyvalent alcohol such as mannitol in an organic solvent of ethylene glycol; in addition, although a sufficient amount of polyvinyl alcohol may be added to the electrolyte in order to increase the withstand voltage of the electrolyte, the solubility in the electrolyte is low, and the electrolyte needs to be heated for a long time. The electrolyte for the medium-high voltage aluminum electrolytic capacitor has high viscosity, which causes difficulty in impregnating the core cladding with the electrolyte,
conventionally, in order to improve the withstand voltage of an aluminum electrolytic capacitor, an oxide film is formed on the surface of an anode foil during the use of the capacitor; this requires that the electrolyte have particularly high performance requirements. However, the solvent of the existing electrolyte is generally a compound such as ethylene glycol, but the solute is difficult to dissolve by adopting the solvent; the repair capability of the oxide film is easily reduced; therefore, the electrolyte solution containing the ethylene glycol electrode solution is not very significant in the effect of reducing the leakage current.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the electrolyte of the high-voltage-resistant aluminum electrolytic capacitor, and the capacitor using the electrolyte has low leakage current.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a high-pressure resistant electrolyte comprises a solvent, a solute and a performance additive; the performance additive includes a polyoxyalkylene polyglyceryl ether.
In the above high-pressure resistant electrolyte, it is preferable that the polymerization degree of polyglycerol in the polyoxyalkylene polyglyceryl ether is 2 to 10; the molar ratio of ethylene oxide to propylene oxide is 61:39-80:20.
Preferably, the polyoxyalkylenepolyglyceryl ether accounts for 0.5-50% of the total weight of the electrolyte.
In the above high-pressure-resistant electrolyte, preferably, the polyoxyalkylenepolyglyceryl ether accounts for 5% to 30% of the total weight of the electrolyte.
In the above electrolyte with high pressure resistance, preferably, the performance additive further comprises polyalkylene glycol; the polyalkylene glycol is a mixture of polyhydroxyethylene and polyhydroxypropylene, and/or a hydroxyethylene-hydroxypropylene copolymer.
In the high-pressure-resistant electrolyte solution, the molar ratio of the hydroxyethylene unit to the hydroxypropylene unit is preferably greater than 1.
In the above electrolyte with high pressure resistance, preferably, the molecular weight of the polyhydroxyethylene is 100-10000; the molecular weight of the polyhydroxypropene is 100-10000.
An aluminum electrolytic capacitor comprises a core package, wherein the core package is impregnated with the high-pressure resistant electrolyte.
Compared with the prior art, the invention has the advantages that: in the invention, when the polyoxoalkylene polyglycerol ether is added into the electrolyte, the withstand voltage of the aluminum electrolytic capacitor is increased, and the addition of the polyalkylene glycol can reduce the leakage current of the aluminum electrolytic capacitor.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Examples
The high-pressure resistant electrolyte contains polyoxy alkylene polyglycerol ether and polyalkylene glycol; other organic solvents, solutes and additives are of course included. Wherein the organic solvent includes, but is not limited to, ethylene glycol, glycerol, and the like; as the solute, an organic acid, an inorganic acid, or a salt thereof can be used. Wherein the organic acid or its salt can be oxalic acid, malonic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, 5,6-decanedicarboxylic acid, etc., and ammonium salt and amine salt thereof. Examples of the inorganic acid or a salt thereof include carbonic acid, hypophosphorous acid, phosphorous acid, phosphoric acid, boric acid, and perhydrochloric acid, and ammonium salts and amine salts thereof. The additive may be nitro compound such as p-nitrobenzoic acid and p-nitrophenol.
In the present invention, polyvinyl alcohol may be added to improve the withstand voltage of the electrolyte, and the content is preferably 3% or less, more preferably 1% or less, based on the total weight of the electrolyte. Wherein, the content of the polyvinyl alcohol exceeds 3 percent, the viscosity of the electrolyte is increased, and the difficulty of the core package for impregnating the electrolyte is increased.
In the present invention, the degree of polymerization of the polyglycerin is 2 to 10. Specific examples thereof include diglycerin, triglycerol, tetraglycerol, hexaglycerol, decaglycerol, and the like. The polymerization degree of the polyglycerol is less than 2, so that the voltage resistance effect of the aluminum electrolytic capacitor is reduced; on the other hand, when the average polymerization degree exceeds 10, the viscosity of the polyglycerol increases, which affects impregnation of the core pack into the electrolyte and also affects performance of the aluminum electrolytic capacitor at low temperatures.
In the present example, the molar ratio of ethylene oxide to propylene oxide was 61:39-80:20. In the present invention, the total number of moles of ethylene oxide and propylene oxide added is 1 to 15mol based on 1 hydroxyl value of the polyglycerin.
The polyoxy alkylene polyglycerol ether accounts for 5 to 30 percent of the total weight of the electrolyte. The content of the polyalkylene glycol is 5-30% of the total weight of the electrolyte. The polyalkylene glycol is a mixture of polyhydroxyethylene and polyhydroxypropylene, and/or a hydroxyethylene-hydroxypropylene copolymer; the molar ratio of the hydroxyethylene units to the hydroxypropylene units is greater than 1 and finally less than 5.
Example 1
In this example, the solvent used was ethylene glycol, the solute used was 5,6-decanedicarboxylic acid, and polyoxyalkylenepolyglyceryl ether and polyalkylene glycol were added. Wherein the weight of each component is 60 percent of ethylene glycol, 5 percent of 5,6-decanedicarboxylic acid, 25 percent of polyoxy alkylene polyglyceryl ether and 10 percent of polyalkylene glycol. In example 1, the polymerization degree of polyglycerol was 3, the number of moles of propylene oxide added was 10, and the number of moles of ethylene oxide added was 25; the molar ratio of the hydroxyethylene units to the hydroxypropylene units in the polyalkylene glycol was 1.5.
Example 2
In this example, the degree of polymerization of polyglycerol was 3, the number of moles of propylene oxide added was 15, and the number of moles of ethylene oxide added was 35; the molar ratio of the hydroxyethylene units to the hydroxypropylene units in the polyalkylene glycol was 1.5. The rest is the same as in example 1.
Comparative example 1
In comparative example 3 no polyoxyalkylenepolyglyceryl ether was added and the weight of the polyoxyalkylenepolyglyceryl ether was replaced with ethylene glycol.
Comparative example 2
In comparative example 3, no polyalkylene glycol was added and the weight of polyalkylene glycol was replaced with ethylene glycol.
Comparative example 3
In comparative example 5, polyoxyalkylenepolyglyceryl ether and polyalkylene glycol were not added; but 1 percent of polyvinyl alcohol, 2 percent of boric acid and 0.05 percent of p-nitrobenzoic acid are added; 5,6-decanedicarboxylic acid 5%; the alkyl group is ethylene glycol.
The same core wrap was used to impregnate the electrolytes of examples 1, 2, 1, 2 and 3; and is packaged to form an aluminum electrolytic capacitor at 0.6/cm 2 Under the current density condition of (2), the withstand voltage of the aluminum electrolytic capacitor was measured.
The sample was left at 120 ℃ or lower for 2000 hours, and after left, a voltage of 35V was applied between the anode lead and the cathode lead, and after 120 seconds, the leakage current was measured and measured 10 times to find the average value.
| Serial number | Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Voltage resistance | 486 | 486 | 472 | 485 | 474 |
| LC mean value μ A | 4.5 | 3.8 | 5.1 | 25.9 | 27.2 |
As shown in the table above, the withstand voltage of example 1 and example 2 is high, and the leakage current is small.
Claims (7)
1. A high-pressure resistant electrolyte is characterized in that: including solvents, solutes, and performance additives; the performance additives include polyoxyalkylenepolyglyceryl ethers and polyalkylene glycols; the polymerization degree of polyglycerol in the polyoxy alkylene polyglycerol ether is 2-10;
the polyalkylene glycol is a mixture of polyhydroxyethylene and polyhydroxypropylene, and/or a hydroxyethylene-hydroxypropylene copolymer; the polyhydroxyethylene accounts for less than 3% of the total weight of the electrolyte.
2. The high-pressure resistant electrolyte as claimed in claim 1, characterized in that: the molar ratio of ethylene oxide to propylene oxide was 61:39-80:20.
3. The high-pressure resistant electrolyte as claimed in claim 1, characterized in that: the polyoxy alkylene polyglycerol ether accounts for 0.5-50% of the total weight of the electrolyte.
4. The high pressure resistant electrolyte of claim 3, wherein: the polyoxy alkylene polyglycerol ether accounts for 5-30% of the total weight of the electrolyte.
5. The high-voltage tolerant electrolyte of claim 1, wherein: the molar ratio of the hydroxy ethylene units to the hydroxy propylene units is greater than 1.
6. The high-pressure resistant electrolyte as claimed in claim 1, characterized in that: the molecular weight of the polyhydroxyethylene is 100-10000; the molecular weight of the polyhydroxypropene is 100-10000.
7. An aluminum electrolytic capacitor, characterized in that: comprising a core pack impregnated with the high pressure resistant electrolyte of any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011283139.3A CN112420393B (en) | 2020-11-17 | 2020-11-17 | High-voltage-resistant electrolyte and aluminum electrolytic capacitor |
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| CN202011283139.3A CN112420393B (en) | 2020-11-17 | 2020-11-17 | High-voltage-resistant electrolyte and aluminum electrolytic capacitor |
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| CN112420393B true CN112420393B (en) | 2022-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665695A (en) * | 2009-11-16 | 2012-09-12 | 赢创罗姆有限公司 | A process for converting a solid (meth)acrylate copolymer into a dispersed form by means of a dispersing agent |
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| DE19835615A1 (en) * | 1998-08-06 | 2000-02-10 | Basf Ag | Compositions suitable for electrochemical cells |
| JP2006165001A (en) * | 2004-12-02 | 2006-06-22 | Nichicon Corp | Aluminum electrolytic capacitor |
| WO2011064939A1 (en) * | 2009-11-26 | 2011-06-03 | パナソニック株式会社 | Electrolytic solution for aluminum electrolytic capacitor, and aluminum electrolytic capacitor using same |
| JP7112837B2 (en) * | 2017-07-31 | 2022-08-04 | 阪本薬品工業株式会社 | Electrolyte for aluminum electrolytic capacitor and aluminum electrolytic capacitor using the same |
| CN111247612B (en) * | 2017-10-31 | 2022-04-15 | 松下知识产权经营株式会社 | Electrolytic capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102665695A (en) * | 2009-11-16 | 2012-09-12 | 赢创罗姆有限公司 | A process for converting a solid (meth)acrylate copolymer into a dispersed form by means of a dispersing agent |
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