CN116153668A - Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same - Google Patents
Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same Download PDFInfo
- Publication number
- CN116153668A CN116153668A CN202211502235.1A CN202211502235A CN116153668A CN 116153668 A CN116153668 A CN 116153668A CN 202211502235 A CN202211502235 A CN 202211502235A CN 116153668 A CN116153668 A CN 116153668A
- Authority
- CN
- China
- Prior art keywords
- parts
- acid
- electrolytic capacitor
- electrolyte
- ammonium salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003792 electrolyte Substances 0.000 title claims abstract description 149
- 239000003990 capacitor Substances 0.000 title claims abstract description 113
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 37
- -1 amine salt Chemical class 0.000 claims abstract description 37
- 239000003381 stabilizer Substances 0.000 claims abstract description 35
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 20
- 239000001257 hydrogen Substances 0.000 claims abstract description 20
- 230000002829 reductive effect Effects 0.000 claims abstract description 20
- 150000007524 organic acids Chemical class 0.000 claims abstract description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 17
- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 60
- 150000003863 ammonium salts Chemical class 0.000 claims description 55
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 51
- 239000011259 mixed solution Substances 0.000 claims description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 35
- 239000002202 Polyethylene glycol Substances 0.000 claims description 30
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 30
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 claims description 30
- 150000002148 esters Chemical class 0.000 claims description 30
- 229920001223 polyethylene glycol Polymers 0.000 claims description 30
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 30
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 27
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 19
- 150000001412 amines Chemical class 0.000 claims description 19
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 18
- 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 claims description 17
- 229930195725 Mannitol Natural products 0.000 claims description 17
- 239000000594 mannitol Substances 0.000 claims description 17
- 235000010355 mannitol Nutrition 0.000 claims description 17
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 16
- 239000004327 boric acid Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 16
- 239000005543 nano-size silicon particle Substances 0.000 claims description 15
- 235000012239 silicon dioxide Nutrition 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- BNUHAJGCKIQFGE-UHFFFAOYSA-N Nitroanisol Chemical compound COC1=CC=C([N+]([O-])=O)C=C1 BNUHAJGCKIQFGE-UHFFFAOYSA-N 0.000 claims description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 6
- OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 claims description 5
- SBLKVIQSIHEQOF-UPHRSURJSA-N Octadec-9-ene-1,18-dioic-acid Chemical compound OC(=O)CCCCCCC\C=C/CCCCCCCC(O)=O SBLKVIQSIHEQOF-UPHRSURJSA-N 0.000 claims description 5
- JZIWMKUVMWKKLP-UHFFFAOYSA-N azane;4-nitrobenzoic acid Chemical compound [NH4+].[O-]C(=O)C1=CC=C([N+]([O-])=O)C=C1 JZIWMKUVMWKKLP-UHFFFAOYSA-N 0.000 claims description 5
- 229940116918 octadecenedioic acid Drugs 0.000 claims description 5
- 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 claims description 5
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 5
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 claims description 4
- WXKSXVWSGPWLIA-UHFFFAOYSA-N azane 2-methylnonanedioic acid Chemical compound N.OC(=O)C(C)CCCCCCC(O)=O WXKSXVWSGPWLIA-UHFFFAOYSA-N 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229940068918 polyethylene glycol 400 Drugs 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229940067597 azelate Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000007112 amidation reaction Methods 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- AGLSQWBSHDEAHB-UHFFFAOYSA-N azane;boric acid Chemical compound N.OB(O)O AGLSQWBSHDEAHB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006053 organic reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
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
-
- 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
- H01G9/145—Liquid electrolytic capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention relates to an electrolyte for an electrolytic capacitor, a preparation method thereof and a capacitor using the same. The electrolyte for the electrolytic capacitor comprises the following components in parts by weight: 8-16 parts of organic acid and amine salt thereof, 1-8 parts of inorganic acid and amine salt thereof, 65-90 parts of organic solvent, 0.5-2.5 parts of hydrogen eliminating agent, 2-9 parts of high temperature stabilizer and 15-40 parts of voltage resistant lifting agent. According to the scheme, the voltage resistance performance can be effectively maintained while the conductivity is improved, the high-voltage capacitor is high in stability in a high-temperature and high-pressure environment, the service life is long, the equivalent series resistance ESR is effectively reduced when the high-voltage and high-ripple aluminum electrolytic capacitor is used in the high-voltage and high-ripple aluminum electrolytic capacitor, the volume of the capacitor is further reduced, the volume of a power supply is further reduced, the development process of the power supply in a small-volume direction is accelerated, the internal consumption of the power supply is reduced, the precision of the power supply is improved, and the output of current is more stable.
Description
Technical Field
The application relates to the technical field of electrolyte, in particular to electrolyte for an electrolytic capacitor, a preparation method of the electrolyte and a capacitor using the electrolyte.
Background
The capacitor is an irreplaceable basic element in various electronic products, is widely applied to electronic equipment comprising a power supply, a motherboard, a sound equipment, an uninterruptible power system and the like, and is used as a common device on an electronic circuit to play roles in filtering, bypass, coupling, decoupling, phase inversion and the like. With the rapid development of electronic component integration and high-speed processing technology in recent years, the global market has put higher demands on the performance of capacitance products, wherein an aluminum electrolytic capacitor is used as the most critical component in the capacitor, and the development trend of the aluminum electrolytic capacitor is that the aluminum electrolytic capacitor has small volume, long service life, high temperature resistance, high-frequency ripple current resistance and low impedance.
The high-voltage aluminum electrolytic capacitor is generally used at the power end of equipment and mainly has a filtering function, so that the current in a power bus is maintained relatively stable, and the stable operation of rear-end components is ensured. In a larger power source, the aluminum electrolytic capacitor occupies a larger position, and the larger the power source is, the more the capacitor occupies, which has a certain inhibiting effect on the miniaturization of the power source. Therefore, if miniaturization of the power supply is desired, the performance of the capacitor must be optimized.
Currently, many factors influencing the performance of the capacitor are important constraint factors except the manufacturing process level, the quality of the anode aluminum foil and the like, and the electrolyte in the capacitor is an important constraint factor. The electrolyte is an actual cathode of the capacitor, plays an important role in providing oxygen ions and repairing an anodic oxide film, and determines the working temperature range, rated voltage, loss factor, impedance, rated ripple current, working life and the like of the capacitor, so the electrolyte is generally required to have the characteristics of high oxidation efficiency, stable physicochemical property, small resistivity and the like, and has no corrosion effect on aluminum foils and sealing materials. In the related art, an electrolytic solution for an aluminum electrolytic capacitor is mainly composed of a main solvent, a main electrolyte, and an additive. The solvent determines the operating temperature range of the capacitor and plays a key role in ion solvation; the primary electrolyte functions to provide ions, making the electrolyte conductive and oxidizing. However, when the existing electrolyte is applied to a high-voltage large-ripple aluminum electrolytic capacitor, the conductivity (namely the conductivity) of the electrolyte is low, the ESR (equivalent series resistance) is high, the volume of the capacitor is not reduced, and the conductivity of the electrolyte is high, but the voltage resistance is low, the electrolyte is not suitable for a long-term high-voltage environment, the stability is poor, and the service life is short.
Therefore, there is a need for an electrolytic capacitor electrolyte that can effectively improve conductivity while maintaining voltage resistance, has high stability in a high temperature and high pressure environment, and has a long service life, and when used in a high voltage large ripple aluminum electrolytic capacitor, effectively reduces equivalent series resistance ESR, thereby reducing the volume of the capacitor.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides an electrolyte for an electrolytic capacitor, a preparation method thereof and a capacitor using the same, wherein the electrolyte for the electrolytic capacitor, the preparation method thereof and the capacitor using the same can effectively improve the conductivity and maintain the voltage resistance, and have the high stability in a high-temperature and high-pressure environment and long service life, and when the electrolyte is used in a high-pressure large-ripple aluminum electrolytic capacitor, the equivalent series resistance ESR is effectively reduced, so that the volume of the capacitor is reduced.
The first aspect of the application provides an electrolyte for an electrolytic capacitor, which comprises the following components in parts by mass: 8-16 parts of organic acid and amine salt thereof, 1-8 parts of inorganic acid and amine salt thereof, 65-90 parts of organic solvent, 0.5-2.5 parts of hydrogen eliminating agent, 2-9 parts of high temperature stabilizer, 12-32 parts of voltage resistant lifting agent and 3-8 parts of second pressure resistant agent.
In one embodiment, the organic acid and amine salts thereof include: at least one of sebacic acid and its ammonium salt, dodecanedioic acid and its ammonium salt, azelaic acid and its ammonium salt, stearic acid and its ammonium salt, octadecenedioic acid and its ammonium salt, 1, 7-sebacic acid and its ammonium salt, 2-methylazelaic acid ammonium and eicosadienedicarboxylic acid amine.
In one embodiment, the mineral acid and amine salts thereof include: at least one of boric acid and ammonium pentaborate.
In one embodiment, the organic solvent comprises: at least one of ethylene glycol, glycerol, butylene glycol, diethylene glycol, benzyl alcohol, oligomeric ethylene glycol and r-butyrolactone.
In one embodiment, the hydrogen scavenger comprises: at least one of p-nitrobenzoic acid, ammonium p-nitrobenzoate, p-nitroanisole and p-nitrobenzyl alcohol.
In one embodiment, the high temperature stabilizer comprises: a first stabilizer and a second stabilizer; the first stabilizer comprises: at least one of phosphoric acid, mannitol and citric acid; the second stabilizer comprises: at least one of phosphorous acid, hypophosphorous acid and butyl phosphate.
In one embodiment, the voltage withstand booster includes: a first pressure-resistant agent and a second pressure-resistant agent; the first pressure resistant agent comprises at least one of polyvinyl alcohol, high polyethylene glycol, polyvinyl alcohol ester, nano silicon dioxide and polyethylene glycol ester; the second pressure resistant agent includes nano silica.
In one embodiment, the organic acid and amine salts thereof include: 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof and 3-5 parts of eicosadienedicarboxylic acid amine; the inorganic acid and the amine salt thereof comprise 1-3 parts of boric acid; the organic solvent comprises 50-60 parts of ethylene glycol, 10-20 parts of propylene glycol and 5-10 parts of diethylene glycol; the hydrogen eliminating agent comprises 0.5-2.5 parts of p-nitrobenzyl alcohol; the high-temperature stabilizer comprises 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol and 0.5-2 parts of citric acid; the voltage-resistant lifting agent comprises 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 parts of polyethylene glycol ester and 3-8 parts of nano silicon dioxide.
The second aspect of the present application provides a method for preparing an electrolyte, specifically including the following steps:
heating and mixing an organic solvent and an inorganic acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
reducing the temperature of the first mixed solution to 140 ℃, adding organic acid and amine salt thereof, inorganic acid amine salt, a first stabilizer and a first pressure-resistant agent, and maintaining for 60min to obtain a second mixed solution;
cooling the second mixed solution to 105 ℃, adding a second stabilizer and a hydrogen eliminating agent, and maintaining for 30min to obtain a third mixed solution;
and (3) reducing the temperature of the third mixed solution to 95 ℃, adding a second pressure-resistant agent, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
A third aspect of the present invention provides a high-voltage large-ripple aluminum electrolytic capacitor using the electrolytic capacitor electrolyte described above.
Compared with the prior art, the technical scheme provided by the application can comprise the following beneficial effects:
(1) The conductivity of the electrolyte for the electrolytic capacitor is improved by about 45% compared with that of the electrolyte sold in the market; the sparking voltage (equivalent to the withstand voltage) is also above 490V, the conductivity is effectively improved, and meanwhile, the withstand voltage of the electrolyte is effectively maintained, namely, the withstand voltage of the electrolyte does not drop along with the rise of the conductivity, and the electrolyte is suitable for high-voltage large-ripple aluminum electrolytic capacitors.
(2) Compared with the commercial electrolyte, the electrolyte for the electrolytic capacitor has the advantages that the reduction speed of the conductivity change rate is far lower than that of the commercial electrolyte after long-time high-temperature storage, and the electrolyte has higher stability at high temperature.
(3) After the high-voltage, high-temperature and large-ripple current verification, the electrolyte for the electrolytic capacitor can basically achieve good results of all parameters of the electrolyte after 4000 hours of use, and has longer service life compared with the electrolyte sold in the market.
(4) The preparation method of the electrolyte is simple and is suitable for mass production and use.
(5) In the high-voltage large-ripple aluminum electrolytic capacitor adopting the electrolyte for the electrolytic capacitor, the performance of the capacitor is obviously improved, the loss angle can be reduced by more than 2 percent, the ESR of the capacitor is reduced by more than 30 percent, the ripple current bearing capacity reaches more than 1.5 times that of other aluminum electrolytic capacitors, the volume of a power supply is effectively reduced, the development process of the power supply in the small-volume direction is accelerated, the internal consumption of the power supply is reduced, the precision of the power supply is improved, the output of current is more stable, and the service life is longer.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic flow chart of a method for preparing an electrolyte shown in an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first message may also be referred to as a second message, and similarly, a second message may also be referred to as a first message, without departing from the scope of the present application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
However, when the existing electrolyte is applied to a high-voltage large-ripple aluminum electrolytic capacitor, the conductivity (namely the conductivity) of the electrolyte is low, the equivalent series resistance ESR is high, the volume of the capacitor is not reduced, and the conductivity of the electrolyte is high, but the voltage resistance is low, the electrolyte is not suitable for a long-term high-voltage environment, the stability is poor, and the service life is short.
In view of the above problems, the embodiment of the application provides an electrolyte for an electrolytic capacitor, which can effectively improve conductivity and maintain voltage resistance, has high stability in a high-temperature and high-pressure environment, has long service life, and can effectively reduce equivalent series resistance ESR when being used in a high-voltage large-ripple aluminum electrolytic capacitor, thereby reducing the volume of the capacitor.
The electrolyte for the electrolytic capacitor comprises the following components in parts by mass: 8-16 parts of organic acid and amine salt thereof, 1-8 parts of inorganic acid and amine salt thereof, 65-90 parts of organic solvent, 0.5-2.5 parts of hydrogen eliminating agent, 2-9 parts of high temperature stabilizer and 15-40 parts of voltage resistant lifting agent.
Wherein, in order to adapt the characteristics of high-voltage large ripple aluminium electrolytic capacitor, the electrolyte of this application mainly adopts organic acid and amine salt and inorganic acid and amine salt, specifically does:
the organic acid and amine salts thereof include: sebacic acid and its ammonium salt, dodecanedioic acid and its ammonium salt, azelaic acid and its ammonium salt, stearic acid and its ammonium salt, octadecenedioic acid and its ammonium salt, 1, 7-sebacic acid and its ammonium salt, 2-methyl azelaic acid ammonium (HS-02) and eicosadienedicarboxylic acid amine (HS-04), wherein the eicosadienedicarboxylic acid has the chemical formula
The inorganic acids and amine salts thereof include: at least one of boric acid and ammonium pentaborate, wherein the boric acid is an inorganic acid, and the ammonium pentaborate is an inorganic acid amine salt; preferably, the following components are prepared according to parts by weightThe organic acid and the amine salt thereof comprise 1-3 parts of dodecanedioic acid and the ammonium salt thereof, 3-5 parts of azelaic acid and the ammonium salt thereof and 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), and the inorganic acid and the amine salt thereof comprise 1-3 parts of boric acid and 1-3 parts of pentaboric acid amine according to mass parts; more preferably, the organic acid and its amine salt comprise 3-5 parts by mass of sebacic acid and its ammonium salt, 1-3 parts by mass of dodecanedioic acid and its ammonium salt, 1-3 parts by mass of 1, 7-sebacic acid and its ammonium salt, and 3-5 parts by mass of eicosadienedicarboxylic acid amine (HS-04), and the inorganic acid and its amine salt comprise 1-3 parts by mass of boric acid. Through the mutual synergistic effect of the organic acid and the amine salt thereof and the inorganic acid and the amine salt thereof, the conductivity of the electrolyte can be improved, so that the electrolyte has the characteristics of high voltage resistance, higher solubility, better high temperature and low temperature resistance, good stability and long service life.
Because boiling point of water is low, the vapor pressure is high, when the temperature exceeds 100 ℃, the capacitor air pressure is easy to be caused to be big and invalid, in addition, the water and the aluminum foil are easy to be hydrated, so that the aluminum foil loses the original performance, when the temperature is higher, the voltage is higher, the water content is higher, the hydration phenomenon of the water and the aluminum foil is more obvious, and in order to adapt to the characteristics of the high-voltage large ripple aluminum electrolytic capacitor, the application gives up the excellent solvent of water, and adopts the organic solvent, specifically: the organic solvent includes: at least one of ethylene glycol, glycerol, butylene glycol, diethylene glycol, benzyl alcohol, oligomeric ethylene glycol and r-butyrolactone; because the electrolyte is mostly organic acid with long carbon chain or branched chain and salts thereof, the solubility of the electrolyte in a single organic solvent is smaller, and the effects obtained by different compatibility are different; preferably, therefore, the organic solvent comprises, by mass, 50-60 parts of ethylene glycol, 5-10 parts of benzyl alcohol, 5-10 parts of butanediol, and 5-10 parts of polyethylene glycol 400; because the solubility of the single ethylene glycol is smaller when the electrolyte is dissolved, the solubility of the electrolyte is obviously increased when the polyhydroxy alcohol (such as glycerol and diglycol) is added, more preferably, the organic solvent comprises 50-60 parts by weight of ethylene glycol, 10-20 parts by weight of glycerol and 5-10 parts by weight of diglycol, and the solubility of the electrolyte can be effectively improved through the combination of a plurality of organic solvents, so that the conductivity of the electrolyte and the service life of the electrolyte are improved.
Because the condenser can take place the reaction under the effect of electric current between inside electrolyte and the aluminium foil in the use, this in-process can produce hydrogen, and hydrogen element can't be utilized in the condenser, if not eliminate, will produce hydrogen, seriously increase the condenser internal pressure, arouse the condenser drum end and explode and become invalid even, in order to eliminate hydrogen element, this application has adopted the increase hydrogen eliminator, hydrogen eliminator includes: at least one of p-nitrobenzoic acid, ammonium p-nitrobenzoate, p-nitroanisole and p-nitrobenzyl alcohol; preferably, the hydrogen eliminator is p-nitroanisole; more preferably, the hydrogen scavenger is p-nitrobenzyl alcohol.
The high temperature stabilizer provided herein includes: a first stabilizer and a second stabilizer; the first stabilizer comprises: at least one of phosphoric acid, mannitol and citric acid; the second stabilizer comprises: at least one of phosphorous acid, hypophosphorous acid and butyl phosphate; although the high-temperature stabilizer is more, the effect of single use is not good, and the effects obtained by different compatibility are different, preferably, the high-temperature stabilizer comprises the following components in parts by weight: 1-5 parts of mannitol, 0.5-2 parts of citric acid and 0.5-2 parts of hypophosphorous acid; more preferably, the high temperature stabilizer comprises the following components in parts by weight: 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol and 0.5-2 parts of citric acid.
In order to improve the withstand voltage capability of the electrolyte, the withstand voltage improving agent comprises: a first pressure-resistant agent and a second pressure-resistant agent, wherein the first pressure-resistant agent comprises at least one of polyvinyl alcohol, high polyethylene glycol, polyvinyl alcohol ester, nano silicon dioxide and polyethylene glycol ester; the second pressure resistant agent comprises nano silicon dioxide, and conductivity can be effectively improved by adopting the nano silicon dioxide.
Because the preparation method of the electrolyte is also very critical, the stability and ultralow temperature performance of the electrolyte are greatly influenced, and in order to ensure that the electrolyte for the electrolytic capacitor has the effect of the application, the application also provides the preparation method of the electrolyte, which specifically comprises the following steps:
s1, heating and mixing an organic solvent and an inorganic acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding organic acid and amine salt, inorganic acid amine salt, a first stabilizer and a first pressure-resistant agent, and maintaining for 60min to obtain a second mixed solution;
s3, reducing the temperature of the second mixed solution to 105 ℃, adding a second stabilizer and a hydrogen eliminating agent, and maintaining for 30min to obtain a third mixed solution;
and S4, reducing the temperature of the third mixed solution to 95 ℃, adding a second pressure-resistant agent, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
First, since the electrolyte, the solvent, the hydrogen eliminator, the high temperature stabilizer and the withstand voltage improving agent are all basically organic matters, the organic reaction has the following characteristics: 1. when the organic chemical reaction is carried out, side reactions often occur, namely, in various substances, due to the complexity of chemical bonds and functional groups, side reactions such as polycondensation reaction, esterification reaction, amidation reaction, etherification reaction, decomposition reaction, addition reaction and the like can occur, and the occurrence of the side reactions can influence the forward reaction, further influence the performance parameters (mainly comprising the difference of conductivity, PH value, sparking voltage and the like) of the electrolyte and directly influence the service life of the capacitor, so that the setting of proper component compatibility and reaction conditions has extremely important influence on the performance of the electrolyte; 2. the condition control requirement of the organic chemical reaction is very strict, even if reactants are the same, but under different reaction conditions (such as different temperatures, time and solvents), products can be completely different.
Secondly, since the high temperature bearing capacity of the first stabilizer and the second stabilizer in the high temperature stabilizer is different, the high temperature bearing capacities of the first pressure resistant agent and the second pressure resistant agent in the pressure resistant improving agent are also different, and the first pressure resistant agent and the second pressure resistant agent need to be added separately to prevent the high temperature stabilizer from deteriorating due to the excessively high temperature.
Finally, the preparation method of the electrolyte is simpler and is suitable for mass production and use.
The following describes the technical scheme of the embodiments of the present application in detail with reference to the accompanying drawings.
Example 1
The electrolyte for the electrolytic capacitor comprises the following components in parts by mass: 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 1-3 parts of boric acid, 50-60 parts of ethylene glycol, 10-20 parts of glycerol, 5-10 parts of diethylene glycol, 0.5-2.5 parts of p-nitrobenzyl alcohol, 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 polyethylene glycol ester and 3-8 parts of nano silicon dioxide.
The preparation method of the electrolyte provided by the application specifically comprises the following steps:
s1, heating and mixing 50-60 parts of ethylene glycol, 10-20 parts of glycerol and 5-10 parts of diethylene glycol with 1-3 parts of boric acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester and 3-8 polyethylene glycol ester, and maintaining for 60 minutes to obtain a second mixed solution;
s3, reducing the temperature of the second mixed solution to 105 ℃, adding 0.5-2.5 parts of p-nitrobenzyl alcohol, and maintaining for 30min to obtain a third mixed solution;
s4, cooling the third mixed solution to 95 ℃, adding 3-8 parts of nano silicon dioxide, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
Example two
The electrolyte for the electrolytic capacitor comprises the following components in parts by mass: 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of azelaic acid and ammonium salt thereof, 1-3 parts of octadecenedioic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 1-3 parts of boric acid, 50-60 parts of ethylene glycol, 5-10 parts of diethylene glycol, 10-20 parts of butanediol, 0.5-2.5 parts of p-nitrobenzoic acid, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 0.5-2 parts of phosphorous acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 polyethylene glycol ester and 3-8 parts of nano silicon dioxide.
The preparation method of the electrolyte provided by the application specifically comprises the following steps:
s1, 50-60 parts of ethylene glycol, 5-10 parts of diethylene glycol and 10-20 parts of butanediol are heated and mixed with 1-3 parts of boric acid, and the mixture is heated to 160 ℃ and maintained for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of azelaic acid and ammonium salt thereof, 1-3 parts of octadecenedioic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 parts of polyethylene glycol ester and maintaining for 60 minutes to obtain a second mixed solution;
s3, cooling the second mixed solution to 105 ℃, adding 0.5-2.5 parts of p-nitrobenzoic acid and 0.5-2 parts of phosphorous acid, and maintaining for 30min to obtain a third mixed solution;
s4, cooling the third mixed solution to 95 ℃, adding 3-8 parts of nano silicon dioxide, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
Example III
The electrolyte for the electrolytic capacitor comprises the following components in parts by mass: 1-3 parts of dodecanedioic acid and ammonium salt thereof, 3-5 parts of azelaic acid and ammonium salt thereof, 1-3 parts of pentaborate amine, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 1-3 parts of boric acid, 50-60 parts of ethylene glycol, 5-10 parts of benzyl alcohol, 5-10 parts of butanediol, 5-10 parts of polyethylene glycol 400, 0.5-2.5 parts of paranitroanisole, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 0.5-2 parts of hypophosphorous acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 polyethylene glycol ester and 3-8 parts of nano silica.
The preparation method of the electrolyte provided by the application specifically comprises the following steps:
s1, heating and mixing 50-60 parts of ethylene glycol, 5-10 parts of benzyl alcohol, 5-10 parts of butanediol, 5-10 parts of polyethylene glycol 400 and 1-3 parts of boric acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding 1-3 parts of dodecanedioic acid and ammonium salt thereof, 3-5 parts of azelaic acid and ammonium salt thereof, 1-3 parts of pentaboric acid amine, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 1-5 parts of mannitol, 0.5-2 parts of citric acid and 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester and 3-8 polyethylene glycol ester, and maintaining for 60 minutes to obtain a second mixed solution;
s3, reducing the temperature of the second mixed solution to 105 ℃, adding 0.5-2 parts of hypophosphorous acid and 0.5-2.5 parts of paranitroanisole, and maintaining for 30min to obtain a third mixed solution;
s4, cooling the third mixed solution to 95 ℃, adding 3-8 parts of nano silicon dioxide, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
Example IV
The electrolyte for the electrolytic capacitor comprises the following components in parts by mass: 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of 2-methyl ammonium azelate (HS-02), 3-5 parts of amine pentaborate, 1-3 parts of boric acid, 50-60 parts of ethylene glycol, 5-10 parts of benzyl alcohol, 5-10 parts of polyethylene glycol 400, 5-10 parts of r-butyrolactone, 0.5-2.5 parts of ammonium p-nitrobenzoate, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 0.5-2 parts of butyl phosphate, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 polyethylene glycol ester and 3-8 parts of nano silica.
The preparation method of the electrolyte provided by the application specifically comprises the following steps:
s1, heating and mixing 5-10 parts of benzyl alcohol, 5-10 parts of polyethylene glycol 400 and 5-10 parts of r-butyrolactone with 1-3 parts of boric acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of 2-methyl ammonium azelate (HS-02), 3-5 parts of amine borate, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester and 3-8 polyethylene glycol ester, and maintaining for 60 minutes to obtain a second mixed solution;
s3, reducing the temperature of the second mixed solution to 105 ℃, adding 0.5-2 parts of butyl phosphate and 0.5-2.5 parts of ammonium p-nitrobenzoate, and maintaining for 30min to obtain a third mixed solution;
s4, cooling the third mixed solution to 95 ℃, adding 3-8 parts of nano silicon dioxide, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
Comparative example 1
The electrolyte for the electrolytic capacitor of comparative example 1 comprises the following components in parts by mass: 3-5 parts of sebacic acid and ammonium salt thereof, 2-6 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 50-60 parts of ethylene glycol, 10-20 parts of glycerol, 5-10 parts of diethylene glycol, 0.5-2.5 parts of p-nitrobenzyl alcohol, 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 polyethylene glycol ester and 3-8 parts of nano silicon dioxide.
The preparation method of the electrolyte provided in comparative example 1 specifically comprises the following steps:
s1, heating and mixing 50-60 parts of ethylene glycol, 10-20 parts of glycerol and 5-10 parts of diethylene glycol, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
s2, reducing the temperature of the first mixed solution to 140 ℃, adding 3-5 parts of sebacic acid and ammonium salt thereof, 2-6 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof, 3-5 parts of eicosadienedicarboxylic acid amine (HS-04), 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol, 0.5-2 parts of citric acid, 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester and 3-8 polyethylene glycol ester, and maintaining for 60 minutes to obtain a second mixed solution;
s3, reducing the temperature of the second mixed solution to 105 ℃, adding 0.5-2.5 parts of p-nitrobenzyl alcohol, and maintaining for 30min to obtain a third mixed solution;
s4, cooling the third mixed solution to 95 ℃, adding 3-8 parts of nano silicon dioxide, maintaining for 20min, and cooling to obtain the electrolyte for the electrolytic capacitor.
Comparative example 2
Commercially available electrolyte for aluminum electrolytic capacitors, such as GBL electrolyte for aluminum electrolytic capacitors manufactured by the company of Changzhou Co., ltd.
The electrolyte in the above examples one to four and comparative example 1 has the following composition in parts by weight:
test results
(1) Testing of initial Performance of electrolyte
The electrolytic capacitor electrolytes of examples one to four and comparative example 1 were tested for conductivity, PH and sparking voltage with commercially available aluminum electrolytic capacitor electrolytes, and the specific results were as follows:
as shown in the above table, the electrolytes provided in examples one to three of the present application have conductivities of 2.0±0.3, 1.5±0.3, and 1.5±0.3, respectively; the conductivity of the electrolyte in comparative example 2 is 1.4±0.3, and it is known that the electrolyte provided in the present application has a conductivity greatly improved compared with the commercially available electrolyte, and in particular, the electrolyte provided in example one has a conductivity improved to 45%; as can be seen from the first embodiment and the comparative example 1, compared with the case of using only organic acid and its amine salt as the electrolyte, the electrolyte in the present application can greatly improve the conductivity when using both organic acid and its amine salt and inorganic acid and its amine salt; meanwhile, as the conductivity and withstand voltage of the electrolyte are in negative correlation characteristics, the higher the conductivity is, the lower the withstand voltage is, but the sparking voltage (equivalent to the withstand voltage) of the electrolyte in each embodiment in the application is also above 490V, the conductivity is effectively improved, and meanwhile, the withstand voltage of the electrolyte is effectively maintained, namely, the withstand voltage of the electrolyte is not reduced along with the rise of the conductivity, so that the electrolyte is suitable for being used in a high-voltage large-ripple aluminum electrolytic capacitor.
(2) Testing of high temperature stability of electrolyte
The electrolytes for electrolytic capacitors in examples one to four and the commercially available electrolytes for aluminum electrolytic capacitors were stored at 125℃for 1000 hours, and the respective electrolyte parameters were changed as shown in the following table:
from the above table, the conductivity change rate of the electrolyte in comparative example 2 was decreased by 31.21%, the conductivity change rate of the electrolyte of example one was decreased by 6.83%, and the conductivity change rate of the electrolyte of example two was decreased by 13.82%; the conductivity change rate of the electrolyte of the third embodiment is reduced by 6.63%; the conductivity change rate of the electrolyte of the fourth embodiment is reduced by 9.63%; it can be seen that: the rate of decrease of the conductivity change rate of the electrolyte provided in the first to fourth embodiments is far lower than that of the electrolyte in the comparative example 2, which indicates that the electrolyte provided in the first to fourth embodiments has better high-temperature stability, wherein the electrolyte provided in the first and third embodiments has smaller conductivity change rate under long-term load of 125 ℃, which indicates that the electrolyte in the first and third embodiments has optimal high-temperature stability, and the compatibility and content of each component in the electrolyte have the best effect of the high-temperature stability under the coordination effect.
(3) Testing of the service life of an electrolyte
The aluminum electrolytic capacitor produced by the same material (except electrolyte), namely the only variable is electrolyte, and the same manufacturing process is adopted, and the production specification and main bill of materials are as follows:
specification of: 450V1000 μf, size 35 x 60, the main materials of the capacitor are as follows:
the parameters of the aluminum electrolytic capacitor are compared and measured under the same conditions, wherein the same conditions are that the constant temperature box is at 105 ℃, the ripple current is 4A/voltage of 450V (direct current voltage+alternating current voltage peak generated by ripple current is not more than 450V of rated voltage), the parameters are measured every 1000 hours after 4000 hours of test, and the specific data are shown in the following table:
as shown in the table above, through the comparison and verification of high voltage, high temperature, large ripple current and long service life test, the electrolyte for the electrolytic capacitor provided in the embodiment one to the embodiment four of the present application can reach the target requirement of 2000 hours, but the electrolyte in the embodiment 2 has the phenomenon of small capacitance loss and large loss in 2000 hours, and cannot realize longer service life, which means that the electrolyte in the embodiment 2 has unstable performance, but the electrolyte provided in the embodiment one of the present application has the minimum change rate of capacitance, and secondly, the electrolyte provided in the embodiment three of the present application has good parameter results after 4000 hours of ripple life, compared with the electrolyte in the embodiment 2, the electrolyte for the electrolytic capacitor provided in the present application can effectively improve the service life, and the electrolyte provided in the embodiment four of the present application has higher stability in the environment of high voltage, high temperature and large ripple current, and cannot reach 4000 hours, which means that the electrolyte provided in the present application has the same upper components and content, but the specific components and the content of the specific components have the same specific components and the specific compatible effects on the performance of the electrolyte.
It should be noted that: during the ripple resistance test, the leakage current was stable and decreased, and the capacity and loss angle measurement frequency was 120Hz, which will not be described in detail here.
In summary, according to the above test, the electrolyte for an electrolytic capacitor in the first embodiment has the best performance in each aspect, and the electrolyte for an electrolytic capacitor in the third embodiment has the inferior performance in each aspect compared with the electrolytes for an electrolytic capacitor in the first to third embodiments, which means that although the components and the contents of the components are the same, the compatibility of specific components and the contents of the components have different effects on the performance of the electrolyte, and that the specific components need proper compatibility and specific contents of the components to achieve the effects.
Example five
The application also provides a high-voltage large-ripple aluminum electrolytic capacitor, which uses the electrolyte for the electrolytic capacitor.
The details of the electrolyte for electrolytic capacitor and the preparation method thereof are described in the above embodiments, and are not repeated here.
In the embodiment of the application, in the high-voltage large-ripple aluminum electrolytic capacitor adopting the electrolyte for the electrolytic capacitor, the performance of the capacitor is obviously improved, the loss angle can be reduced by more than 2 percent, the ESR of the capacitor is reduced by more than 30 percent, and the ripple current bearing capacity is more than 1.5 times that of other aluminum electrolytic capacitors, namely, the aluminum electrolytic capacitor adopting the electrolyte for the electrolytic capacitor provided by the application has the capacity of only two thirds or less of the original capacity under the condition of the power source with the same ripple current requirement, so that the power source space is saved, the volume of the power source is effectively reduced, and the development process of the power source towards the small volume direction is accelerated; meanwhile, the aluminum electrolytic capacitor adopting the electrolyte for the electrolytic capacitor provided by the application is used on a filtering power supply, so that the internal consumption of the power supply can be effectively reduced, the precision of the power supply is improved, the output of current is more stable, and the service life is longer.
The specific manner in which the respective modules perform the operations in the apparatus of the above embodiments has been described in detail in the embodiments related to the method, and will not be described in detail herein.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. Those skilled in the art will also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined and pruned according to actual needs, and the modules in the apparatus of the embodiment of the present application may be combined, divided and pruned according to actual needs.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. An electrolyte for an electrolytic capacitor, characterized in that: the composite material comprises the following components in parts by mass: 8-16 parts of organic acid and amine salt thereof, 1-8 parts of inorganic acid and amine salt thereof, 65-90 parts of organic solvent, 0.5-2.5 parts of hydrogen eliminating agent, 2-9 parts of high temperature stabilizer and 15-40 parts of voltage resistant lifting agent.
2. The electrolytic capacitor electrolyte according to claim 1, wherein:
the organic acid and amine salts thereof include: at least one of sebacic acid and its ammonium salt, dodecanedioic acid and its ammonium salt, azelaic acid and its ammonium salt, stearic acid and its ammonium salt, octadecenedioic acid and its ammonium salt, 1, 7-sebacic acid and its ammonium salt, 2-methylazelaic acid ammonium and eicosadienedicarboxylic acid amine.
3. The electrolytic capacitor electrolyte according to claim 1, wherein:
the inorganic acids and amine salts thereof include: at least one of boric acid and ammonium pentaborate.
4. The electrolytic capacitor electrolyte according to claim 1, wherein:
the organic solvent includes: at least one of ethylene glycol, glycerol, butylene glycol, diethylene glycol, benzyl alcohol, oligomeric ethylene glycol and r-butyrolactone.
5. The electrolytic capacitor electrolyte according to claim 1, wherein:
the hydrogen eliminator comprises: at least one of p-nitrobenzoic acid, ammonium p-nitrobenzoate, p-nitroanisole and p-nitrobenzyl alcohol.
6. The electrolytic capacitor electrolyte according to claim 1, wherein:
the high temperature stabilizer comprises: a first stabilizer and a second stabilizer;
the first stabilizer comprises: at least one of phosphoric acid, mannitol and citric acid;
the second stabilizer comprises: at least one of phosphorous acid, hypophosphorous acid and butyl phosphate.
7. The electrolytic capacitor electrolyte according to claim 1, wherein:
the withstand voltage improving agent includes: a first pressure-resistant agent and a second pressure-resistant agent;
the first pressure resistant agent comprises at least one of polyvinyl alcohol, high polyethylene glycol, polyvinyl alcohol ester, nano silicon dioxide and polyethylene glycol ester;
the second pressure resistant agent includes nano silica.
8. The electrolytic capacitor electrolyte according to claim 1, wherein:
the organic acid and amine salts thereof include: 3-5 parts of sebacic acid and ammonium salt thereof, 1-3 parts of dodecanedioic acid and ammonium salt thereof, 1-3 parts of 1, 7-sebacic acid and ammonium salt thereof and 3-5 parts of eicosadienedicarboxylic acid amine;
the inorganic acid and the amine salt thereof comprise 1-3 parts of boric acid;
the organic solvent comprises 50-60 parts of ethylene glycol, 10-20 parts of propylene glycol and 5-10 parts of diethylene glycol;
the hydrogen eliminating agent comprises 0.5-2.5 parts of p-nitrobenzyl alcohol;
the high-temperature stabilizer comprises 0.5-2 parts of phosphoric acid, 1-5 parts of mannitol and 0.5-2 parts of citric acid;
the voltage-resistant lifting agent comprises 3-8 parts of polyvinyl alcohol, 3-8 parts of polyethylene glycol 2000, 3-8 parts of polyvinyl alcohol ester, 3-8 parts of polyethylene glycol ester and 3-8 parts of nano silicon dioxide.
9. A preparation method of electrolyte is characterized in that: the method specifically comprises the following steps:
heating and mixing an organic solvent and an inorganic acid, heating to 160 ℃, and maintaining for 120min to obtain a first mixed solution;
reducing the temperature of the first mixed solution to 140 ℃, adding organic acid and amine salt thereof, inorganic acid amine salt, a first stabilizer and a withstand voltage lifting agent, and maintaining for 60min to obtain a second mixed solution;
cooling the second mixed solution to 105 ℃, adding a second stabilizer and a hydrogen eliminating agent, and maintaining for 30min to obtain a third mixed solution;
the temperature of the third mixed solution is reduced to 95 ℃, the second pressure-resistant agent is added, and after the third mixed solution is maintained for 20 minutes, the electrolyte for the electrolytic capacitor is obtained by cooling.
10. A high-voltage large ripple aluminum electrolytic capacitor is characterized in that: the electrolytic capacitor using the electrolytic capacitor electrolyte according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211502235.1A CN116153668A (en) | 2022-11-28 | 2022-11-28 | Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211502235.1A CN116153668A (en) | 2022-11-28 | 2022-11-28 | Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116153668A true CN116153668A (en) | 2023-05-23 |
Family
ID=86359048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211502235.1A Pending CN116153668A (en) | 2022-11-28 | 2022-11-28 | Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116153668A (en) |
-
2022
- 2022-11-28 CN CN202211502235.1A patent/CN116153668A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110692115B (en) | Hybrid aluminum electrolytic capacitor and manufacturing method thereof | |
| CN110730994B (en) | Hybrid aluminum electrolytic capacitor and manufacturing method thereof | |
| CN105405661A (en) | Manufacturing method of solid-state electrolytic capacitor | |
| CN101916671B (en) | Preparation method of solid electrolytic capacitor capable of reducing ESR and enhancing electrostatic capacitance | |
| KR20170138913A (en) | Electrolyte for aluminum electrolytic capacitor and aluminum electrolytic capacitor using same | |
| CN112951606B (en) | Electrolyte for high-voltage bolt capacitor and preparation method thereof | |
| CN112582180B (en) | Electrolyte for high-hydration-resistance medium-high voltage aluminum electrolytic capacitor and preparation method | |
| CN104681278A (en) | High-voltage aluminium electrolysis capacitor | |
| CN116153668A (en) | Electrolyte for electrolytic capacitor, preparation method thereof and capacitor using same | |
| CN112582181B (en) | Electrolyte for low-voltage aluminum electrolytic capacitor with high hydration resistance and preparation method | |
| CN110931256A (en) | Electrolyte for high-voltage-resistant aluminum electrolytic capacitor and preparation method thereof | |
| CN110246697B (en) | Special electrolyte for mixed electrolyte and preparation method thereof | |
| JP2009182275A (en) | Electrolytic solution for driving electrolytic capacitor, and electrolytic capacitor | |
| CN114284072A (en) | Electrolyte for capacitor with wide temperature range, preparation method of electrolyte and capacitor | |
| JP2007184303A (en) | Electrolytic capacitor, and electrolyte for driving same | |
| CN107887164B (en) | Working electrolyte of 130 ℃ high-voltage aluminum electrolytic capacitor and preparation method | |
| CN113539688B (en) | Electrolyte for aluminum electrolytic capacitor with working voltage of 300-500V and aluminum electrolytic capacitor | |
| CN114068184B (en) | Aluminum electrolytic capacitor and preparation method thereof | |
| JPS63175412A (en) | Electrolyte for electrolytic capacitor | |
| CN116364437A (en) | Working electrolyte for medium-high voltage aluminum electrolytic capacitor and preparation method thereof | |
| JP4158412B2 (en) | Electrolytic solution for electrochemical capacitor and electrochemical capacitor using the same | |
| JP5012377B2 (en) | Electrolytic capacitor | |
| JP2007194311A (en) | Electric double-layer capacitor | |
| CN113517140A (en) | Working electrolyte for improving hydration resistance of low-voltage aluminum electrolytic capacitor and preparation method thereof | |
| CN104681279A (en) | Capacitor electrolyte and capacitor using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |