CN109326447A - A kind of electrolytic capacitor - Google Patents
A kind of electrolytic capacitor Download PDFInfo
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- CN109326447A CN109326447A CN201811320623.1A CN201811320623A CN109326447A CN 109326447 A CN109326447 A CN 109326447A CN 201811320623 A CN201811320623 A CN 201811320623A CN 109326447 A CN109326447 A CN 109326447A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 53
- 239000003792 electrolyte Substances 0.000 claims abstract description 39
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 239000005030 aluminium foil Substances 0.000 claims abstract description 14
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 10
- IUZSEJJESGRFMH-UHFFFAOYSA-N azane;decanedioic acid Chemical compound N.OC(=O)CCCCCCCCC(O)=O IUZSEJJESGRFMH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 10
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 70
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 70
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 68
- 239000000243 solution Substances 0.000 claims description 49
- 239000000377 silicon dioxide Substances 0.000 claims description 33
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 18
- 239000000908 ammonium hydroxide Substances 0.000 claims description 18
- 235000012239 silicon dioxide Nutrition 0.000 claims description 17
- 229960004756 ethanol Drugs 0.000 claims description 16
- 150000001298 alcohols Chemical class 0.000 claims description 15
- 239000012065 filter cake Substances 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 239000003643 water by type Substances 0.000 claims description 6
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 229960001866 silicon dioxide Drugs 0.000 claims 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 229910003978 SiClx Inorganic materials 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- JXJTWJYTKGINRZ-UHFFFAOYSA-J silicon(4+);tetraacetate Chemical compound [Si+4].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O JXJTWJYTKGINRZ-UHFFFAOYSA-J 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- 238000004090 dissolution Methods 0.000 abstract description 4
- 235000019441 ethanol Nutrition 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000001291 vacuum drying Methods 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910000077 silane Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- -1 anode Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- JKGITWJSGDFJKO-UHFFFAOYSA-N ethoxy(trihydroxy)silane Chemical compound CCO[Si](O)(O)O JKGITWJSGDFJKO-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009435 amidation Effects 0.000 description 1
- 238000007112 amidation reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005406 washing Methods 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
- H01G9/145—Liquid electrolytic capacitors
-
- 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
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Silicon Compounds (AREA)
Abstract
The present invention relates to capacitor areas, provide a kind of electrolytic capacitor, for improving the service life of capacitor.A kind of electrolytic capacitor provided by the invention, including anode, aluminium foil cathode, spacer and the electrolyte that there is the aluminium foil of alumina coating to constitute on surface, in the electrolyte of the spacer arrangement between the anode and cathode；It include: 65 ~ 70 mass parts of ethylene glycol, 1 ~ 6 mass parts of modifying agent, 8 ~ 10 mass parts of sebacic acid ammonium, 1 ~ 2 mass parts of dodecandioic acid ammonium, 5 ~ 8 mass parts of polyethylene glycol, 2 ~ 4 mass parts of auxiliary agent in the electrolyte.Anode or cathode that aluminium foil is constituted can significantly inhibit the dissolution of aluminium, reduce the impedance of capacitor and longer life expectancy；The service life of capacitor can be further improved with electrolyte combination.
Description
Technical field
The present invention relates to capacitor areas, and in particular to a kind of electrolytic capacitor.
Background technique
Electrolytic capacitor is one kind of capacitor, and metal foil is positive (aluminium or tantalum), and the oxidation film (oxidation of metal is close to anode
Aluminium or tantalum pentoxide) it is dielectric, cathode is by conductive material, electrolyte (electrolyte can be liquid or solid) and other materials
Material collectively constitutes, and because electrolyte is the major part of cathode, therefore electrolytic capacitor is gained the name.
Currently, the existing dedicated aluminium electrolutic capacitor of frequency converter since the Working electrolyte system of use is relatively simple, works
Electrolyte high temperature physical and chemical performance is unstable, and flash over voltage is relatively low, the reaction such as thermal decomposition, amidation and esterification easily occurs, simultaneously
Since it uses conventional design, capacitor stability is not high, and resistance to ripple current ability is poor, and easily decomposed under pyroreaction etc.,
Cause product during aging is charged in production, interiors of products fever height just occur, temperature rise changes phenomenon greatly.In addition, it produces
The miniaturization of product, the reduction of inner space, temperature rise change phenomenon greatly and directly result in interiors of products repetition sparking burn, microexplosion
Fried, the bad products appearance is without obvious failure characteristics, and the phenomenon can repeat when recharge aging, tests the mistake with sorting
It can not be rejected completely in journey, which will lead to short circuit in use, and phenomenon of opening a way, there are serious quality is hidden
Suffer from.
Summary of the invention
Present invention solves the technical problem that providing a kind of electrolytic capacitor to improve the service life of capacitor.
In order to solve the above technical problem, the present invention provides technical solution are as follows:
A kind of electrolytic capacitor, anode, aluminium foil cathode, spacer and the electricity that including surface there is the aluminium foil of alumina coating to constitute
Liquid is solved, in the electrolyte of the spacer arrangement between the anode and cathode；Include: in the electrolyte ethylene glycol 65 ~
70 mass parts, 1 ~ 6 mass parts of modifying agent, 8 ~ 10 mass parts of sebacic acid ammonium, 1 ~ 2 mass parts of dodecandioic acid ammonium, 5 ~ 8 matter of polyethylene glycol
Measure part, 2 ~ 4 mass parts of auxiliary agent.
Anode or cathode that aluminium foil is constituted can significantly inhibit the dissolution of aluminium, reduce the impedance of capacitor and service life more
It is long；The service life of capacitor can be further improved with electrolyte combination.
The anode and cathode of aluminium foil cladding decline the impedance of capacitor, and the service life of product has obtained significantly mentioning
It is high.
Preferably, the electrolyte include: 66 ~ 70 mass parts of ethylene glycol, 5 ~ 6 mass parts of modifying agent, sebacic acid ammonium 9 ~
10 mass parts, 1.5 ~ 2 mass parts of dodecandioic acid ammonium, 7.5 ~ 8 mass parts of polyethylene glycol, 3 ~ 4 mass parts of auxiliary agent.Match within this range
The electrolyte of system can be further improved the service life of capacitor.
Preferably, the electrolyte include: 66 mass parts of ethylene glycol, 5 mass parts of modifying agent, 9 mass parts of sebacic acid ammonium,
1.5 mass parts of dodecandioic acid ammonium, 7.5 mass parts of polyethylene glycol, 3 mass parts of auxiliary agent.It can be more by the electrolyte of this proportion configuration
The further service life for improving capacitor.
Preferably, the modifying agent is modified manometer silicon dioxide.The sudden strain of a muscle with higher of modifying agent nano silica
Thermoelectricity pressure and oxidation efficiency, the thermal stability of electrolyte can be turned up, while there is certain anticorrosive property, can with high temperature resistant,
Physical life is long.
Preferably, the modified manometer silicon dioxide the preparation method comprises the following steps: taking 39 ~ 53 parts of dehydrated alcohols and 7.5 ~ 8.5
Part deionized water obtains ethanol solution after mixing for use；Take 29 ~ 51 part of 25% ammonium hydroxide；Take 4.3 ~ 8.7 parts of positive silicon
Acetoacetic ester and 39 ~ 41 parts of dehydrated alcohol are uniformly mixed, obtain teos solution；By configured ethanol solution
It is heated under stiring with ammonium hydroxide, speed of agitator 150r/min, temperature is 60 DEG C, is condensed back reaction 8h, is raised to 40 in temperature
After DEG C, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h, 1.4 ~ 3.6 parts of silane is taken
Coupling agent KH570 and 29 ~ 31 parts of dehydrated alcohols, are placed in a beaker uniformly mixed, and mixed solution is added with the speed of 1 part/min
In first reaction system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；It is anti-by second
System 1 ~ 3h of ultrasonic water bath is answered, bath temperature is 50 ~ 80 DEG C, and supersonic frequency is 80 ~ 100KHz；Dehydrated alcohol 100 ~ 200 is added
Mass parts filter after 3 ~ 6min of agitator treating, take filter cake and dehydrated alcohol to be mixed and made into solution, obtain third reaction system；?
It is filtered after 200 mass parts of deionized water stirring 5min is added in third reaction system, takes filtration cakes torrefaction；Grinding obtains after drying
Modified manometer silicon dioxide powder granule.The nanometer titanium dioxide obtained after condensing reflux, ultrasonic disperse, vacuum drying and grinding
Silicon has the characteristics that regular appearance, uniform particle sizes, well dispersed, and is added in electrolyte and can significantly improve the resistance to of capacitor
The effect of high temperature further increases the service life of capacitor.
Preferably, the modified manometer silicon dioxide the preparation method comprises the following steps: taking 45 ~ 53 parts of dehydrated alcohols and 8 ~ 8.5 parts
Deionized water obtains ethanol solution after mixing for use；Take 45 ~ 51 part of 25% ammonium hydroxide；Take 6.9 ~ 8.7 parts of positive silicic acid
Ethyl ester and 40 ~ 41 parts of dehydrated alcohol are uniformly mixed, obtain teos solution；By configured ethanol solution and
Ammonium hydroxide heats under stiring, speed of agitator 150r/min, and temperature is 60 DEG C, is condensed back reaction 8h, is raised to 40 DEG C in temperature
Afterwards, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h, 2 ~ 3.6 parts silane coupled is taken
Agent KH570 and 30 ~ 31 parts of dehydrated alcohols, are placed in a beaker uniformly mixed, and mixed solution is added first with the speed of 1 part/min
In reaction system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；By the second reactant
It is 2 ~ 3h of ultrasonic water bath, bath temperature is 60 ~ 80 DEG C, and supersonic frequency is 90 ~ 100KHz；150 ~ 200 mass of dehydrated alcohol is added
Part, it is filtered after 5 ~ 6min of agitator treating, takes filter cake and dehydrated alcohol to be mixed and made into solution, obtain third reaction system；In third
It is filtered after 200 mass parts of deionized water stirring 5min is added in reaction system, takes filtration cakes torrefaction；Grinding is modified after drying
Nano silica powder particle.Being added in electrolyte by nano silica made of this proportion can be further improved electricity
The feature of the high temperature resistant of appearance and service life length.
Preferably, the modified manometer silicon dioxide the preparation method comprises the following steps: taking 45 parts of dehydrated alcohols and 8 parts of deionizations
Water obtains ethanol solution after mixing for use；Take 45 part of 25% ammonium hydroxide；Take 6.9 parts ethyl orthosilicate and 40 parts
Dehydrated alcohol is uniformly mixed, obtains teos solution；Configured ethanol solution and ammonium hydroxide are added under stiring
Heat, speed of agitator 150r/min, temperature are 60 DEG C, are condensed back reaction 8h and positive silicic acid second is added after temperature is raised to 40 DEG C
Ester solution obtains the first reaction system；Be condensed back reaction 8h after, take 2.6 parts silane coupling agent KH570 and 30 parts it is anhydrous
Ethyl alcohol, is placed in a beaker uniformly mixed, and mixed solution is added in the first reaction system with the speed of 1 part/min, will stirring speed
Rate is increased to 250r/min, reacts 15min, obtains the second reaction system；By the second reaction system ultrasonic water bath 2h, water-bath temperature
Degree is 60 DEG C, supersonic frequency 90KHz；150 mass parts of dehydrated alcohol are added, is filtered after agitator treating 5min, takes filter cake and nothing
Water-ethanol is mixed and made into solution, obtains third reaction system；200 mass parts of deionized water are added in third reaction system to stir
It is filtered after mixing 5min, takes filtration cakes torrefaction；Grinding obtains modified manometer silicon dioxide powder granule after drying.By this proportion preparation
Nano silica be added to and can be further improved capacitor high temperature resistant and service life long performance in electrolyte.
Preferably, during the condensing reflux, during heating when temperature reaches 40 DEG C, with 0.5 part/min's
Teos solution is added in speed.Being gradually added into teos solution can be improved the dispersion effect of nano silica.
Preferably, the third reaction system takes filter cake to be dried after filtering, and the mode of the drying is vacuum
It is dry, 80 DEG C of drying temperature, vacuum degree 0.1MPa, drying time 1h.Vacuum drying can effectively improve nano silica
It is added to the high temperature resistance that can be further improved capacitor in electrolyte.
Preferably, sieve used in the sieving is 300 ~ 500 meshes.The lesser modified manometer silicon dioxide pair of partial size
The promotion effect of capacitive property is larger.
Compared with prior art, the device have the advantages that are as follows: aluminium foil constitute anode or cathode can be significant
Inhibition aluminium dissolution, reduce the impedance of capacitor and longer life expectancy；Capacitor can be further improved with electrolyte combination
Service life；Modifying agent nano silica flash over voltage with higher and oxidation efficiency, can be turned up the thermal stability of electrolyte,
There is certain anticorrosive property simultaneously, can be with high temperature resistant, physical life is long.
Specific embodiment
Following implementation column is to further explanation of the invention, is not limitation of the present invention.
Embodiment 1
A kind of electrolytic capacitor, anode, aluminium foil cathode, spacer and the electricity that including surface there is the aluminium foil of alumina coating to constitute
Liquid is solved, in the electrolyte of the spacer arrangement between the anode and cathode；The electrolyte includes: 66 mass of ethylene glycol
Part, 5 mass parts of modifying agent, 9 mass parts of sebacic acid ammonium, 1.5 mass parts of dodecandioic acid ammonium, 7.5 mass parts of polyethylene glycol, auxiliary agent 3
Mass parts.The modifying agent is modified manometer silicon dioxide.The modified manometer silicon dioxide the preparation method comprises the following steps: taking
45 parts of dehydrated alcohols and 8 parts of deionized waters obtain ethanol solution after mixing for use；Take 45 part of 25% ammonium hydroxide；Take 6.9
The ethyl orthosilicate and 40 parts of dehydrated alcohol of part are uniformly mixed, obtain teos solution；By configured anhydrous second
Alcoholic solution and ammonium hydroxide heat under stiring, speed of agitator 150r/min, and temperature is 60 DEG C, reaction 8h are condensed back, in temperature
After being raised to 40 DEG C, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h, 2.6 parts of silicon is taken
Alkane coupling agent KH570 and 30 parts of dehydrated alcohols, are placed in a beaker uniformly mixed, and mixed solution is added with the speed of 1 part/min
In first reaction system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；It is anti-by second
System ultrasonic water bath 2h is answered, bath temperature is 60 DEG C, supersonic frequency 90KHz；150 mass parts of dehydrated alcohol are added, stirring is washed
It is filtered after washing 5min, takes filter cake and dehydrated alcohol to be mixed and made into solution, obtain third reaction system；In third reaction system
It is filtered after 200 mass parts of deionized water stirring 5min is added, takes filtration cakes torrefaction；Grinding obtains modified nano-silica after drying
Silicon powder particle.During the condensing reflux, during heating when temperature reaches 40 DEG C, with the speed of 0.5 part/min
Teos solution is added.The third reaction system takes filter cake to be dried after filtering, and the mode of the drying is
Vacuum drying, 80 DEG C of drying temperature, vacuum degree 0.1MPa, drying time 1h.Sieve used in the sieving is 400 meshes.
The auxiliary agent is passivator.
Anode or cathode that aluminium foil is constituted can significantly inhibit the dissolution of aluminium, reduce the impedance of capacitor and service life more
It is long；The service life of capacitor can be further improved with electrolyte combination.
The anode and cathode of aluminium foil cladding decline the impedance of capacitor, and the service life of product has obtained significantly mentioning
It is high.Modifying agent nano silica flash over voltage with higher and oxidation efficiency, can be turned up the thermal stability of electrolyte, together
When with certain anticorrosive property, can be with high temperature resistant, physical life is long.Through condensing reflux, ultrasonic disperse, vacuum drying and grind
Nano silica obtained has the characteristics that regular appearance, uniform particle sizes, well dispersed afterwards, and being added in electrolyte can be with
The significant effect resistant to high temperature for improving capacitor, further increases the service life of capacitor.It is gradually added into teos solution
The dispersion effect of nano silica can be improved.Vacuum drying can effectively improve nano silica and be added to electrolyte
In can be further improved the high temperature resistance of capacitor.The lesser modified manometer silicon dioxide of partial size imitates the promotion of capacitive property
Fruit is larger.
Embodiment 2
Embodiment 2 with embodiment 1 the difference is that, include: 65 mass parts of ethylene glycol, 1 matter of modifying agent in the electrolyte
Measure part, 8 mass parts of sebacic acid ammonium, 1 mass parts of dodecandioic acid ammonium, 5 mass parts of polyethylene glycol, 2 mass parts of auxiliary agent.
Embodiment 3
Embodiment 3 with embodiment 1 the difference is that, include: 70 mass parts of ethylene glycol, 6 matter of modifying agent in the electrolyte
Measure part, 10 mass parts of sebacic acid ammonium, 2 mass parts of dodecandioic acid ammonium, 8 mass parts of polyethylene glycol, 4 mass parts of auxiliary agent.
Embodiment 4
Embodiment 4 with embodiment 1 the difference is that, the modified manometer silicon dioxide the preparation method comprises the following steps: taking 39 parts of nothings
Water-ethanol and 7.5 parts of deionized waters obtain ethanol solution after mixing for use；Take 29 part of 25% ammonium hydroxide；Take 4.3 parts
Ethyl orthosilicate and 39 parts of dehydrated alcohol are uniformly mixed, obtain teos solution；Configured dehydrated alcohol is molten
Liquid and ammonium hydroxide heat under stiring, speed of agitator 150r/min, and temperature is 60 DEG C, are condensed back reaction 8h, are raised in temperature
After 40 DEG C, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h, take 1.4 parts of silane even
Join agent KH570 and 29 parts of dehydrated alcohols, be placed in a beaker uniformly mixed, mixed solution is added first with the speed of 1 part/min
In reaction system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；By the second reactant
It is ultrasonic water bath 1h, bath temperature is 50 DEG C, supersonic frequency 80KHz；100 mass parts of dehydrated alcohol, agitator treating is added
It is filtered after 3min, takes filter cake and dehydrated alcohol to be mixed and made into solution, obtain third reaction system；Add in third reaction system
It is filtered after entering 200 mass parts of deionized water stirring 5min, takes filtration cakes torrefaction；Grinding obtains modified manometer silicon dioxide after drying
Powder granule.
Embodiment 5
Embodiment 5 with embodiment 1 the difference is that, the modified manometer silicon dioxide the preparation method comprises the following steps: taking 53 parts of nothings
Water-ethanol and 8.5 parts of deionized waters obtain ethanol solution after mixing for use；Take 51 part of 25% ammonium hydroxide；Take 8.7 parts
Ethyl orthosilicate and 41 parts of water-ethanol are uniformly mixed, obtain teos solution；By configured ethanol solution
It is heated under stiring with ammonium hydroxide, speed of agitator 150r/min, temperature is 60 DEG C, is condensed back reaction 8h, is raised to 40 in temperature
After DEG C, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h, 3.6 parts silane coupled is taken
Agent KH570 and 31 parts of dehydrated alcohols, are placed in a beaker uniformly mixed, and it is anti-that mixed solution with the speed of 1 part/min is added first
It answers in system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；By the second reaction system
Ultrasonic water bath 3h, bath temperature are 80 DEG C, supersonic frequency 100KHz；200 mass parts of dehydrated alcohol, agitator treating 6min is added
After filter, take filter cake and dehydrated alcohol be mixed and made into solution, obtain third reaction system；It is added and goes in third reaction system
It is filtered after 200 mass parts of ionized water stirring 5min, takes filtration cakes torrefaction；Grinding obtains modified manometer silicon dioxide powder after drying
Particle.
Embodiment 6
Embodiment 6 with embodiment 1 the difference is that, the modifying agent be nano silica.
Embodiment 7
Embodiment 7 with embodiment 1 the difference is that, during the condensing reflux, after temperature is raised to 40 DEG C, disposably
Whole ethyl orthosilicates is added.
Embodiment 8
Embodiment 8 with embodiment 1 the difference is that, will third reaction system filter after obtain filter cake and be put into baking oven to dry.
Comparative example 1
Comparative example 1 with embodiment 1 the difference is that, in the electrolyte be free of modifying agent.
Comparative example 2
Comparative example 2 with embodiment 1 the difference is that, the uncoated aluminium film of the anode and cathode.
Comparative example 3
Comparative example 3 with embodiment 1 the difference is that, second reaction system is without ultrasonic disperse.
Experimental example
The flash over voltage of the electrolyte of electrolytic capacitor made of difference testing example 1 ~ 9 and comparative example 1 ~ 2, and it is small through 1000
When endurance test after capacity；Resistance to ripple test is separately carried out, the temperature inside capacitor is measured.
As can be known from the above table, the performance of the capacitor in embodiment 1 ~ 5 is significantly better than comparative example, the capacity loss of comparative example compared with
Greatly, it is seen that joined modifying agent or can effectively improve the service life of capacitor using protection foil electrode.
For embodiment 1 ~ 5 compared with comparative example 1, the capacity loss of capacitor is smaller, shows that modified manometer silicon dioxide exists
The service life of capacitor is improved to a certain extent.
The capacity loss minimum of embodiment 1, flash over voltage highest, internal temperature are lower, are preferably embodiments.
The capacity loss of embodiment 1 ~ 3 is better than embodiment 4 ~ 5, shows the production of the nano silica in embodiment 1 ~ 3
Method and formula are more optimal solutions.
Embodiment 6 uses unmodified nano silica as modifying agent, and effect is poor, shows nano silica
Modified necessity；The performance of capacitor in embodiment 7 is poor, shows the ethyl orthosilicate in nano silica preparation process
Adding manner have a certain impact to electrolyte quality；The drying mode of filter cake in embodiment 8 has certain with embodiment 1
Difference shows that each technical process in the application more closely links together, it is necessary to use corresponding processing step
Preferable effect could be generated.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and above embodiments are not to limit this
The scope of the patents of invention, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (10)
1. a kind of electrolytic capacitor, which is characterized in that anode, the aluminium foil yin that including surface there is the aluminium foil of alumina coating to constitute
Pole, spacer and electrolyte, in the electrolyte of the spacer arrangement between the anode and cathode；In the electrolyte
It include: 65 ~ 70 mass parts of ethylene glycol, 1 ~ 6 mass parts of modifying agent, 8 ~ 10 mass parts of sebacic acid ammonium, 1 ~ 2 mass of dodecandioic acid ammonium
Part, 5 ~ 8 mass parts of polyethylene glycol, 2 ~ 4 mass parts of auxiliary agent.
2. a kind of electrolytic capacitor according to claim 1, which is characterized in that the electrolyte include: ethylene glycol 66 ~
70 mass parts, 5 ~ 6 mass parts of modifying agent, 9 ~ 10 mass parts of sebacic acid ammonium, 1.5 ~ 2 mass parts of dodecandioic acid ammonium, polyethylene glycol 7.5
~ 8 mass parts, 3 ~ 4 mass parts of auxiliary agent.
3. according to claim 1 or a kind of electrolytic capacitor as claimed in claim 2, which is characterized in that the electrolyte packet
It includes: 66 mass parts of ethylene glycol, 5 mass parts of modifying agent, 9 mass parts of sebacic acid ammonium, 1.5 mass parts of dodecandioic acid ammonium, polyethylene glycol
7.5 mass parts, 3 mass parts of auxiliary agent.
4. a kind of electrolytic capacitor according to claim 2, which is characterized in that the modifying agent is modified nano-silica
SiClx.
5. a kind of electrolytic capacitor according to claim 1, which is characterized in that the system of the modified manometer silicon dioxide
Preparation Method are as follows: take 39 ~ 53 parts of dehydrated alcohols and 7.5 ~ 8.5 parts of deionized waters that it is molten to obtain dehydrated alcohol after mixing for use
Liquid；Take 29 ~ 51 part of 25% ammonium hydroxide；4.3 ~ 8.7 parts of ethyl orthosilicate and 39 ~ 41 parts of dehydrated alcohol are taken, is uniformly mixed, obtains
Teos solution；Configured ethanol solution and ammonium hydroxide are heated under stiring, speed of agitator 150r/min,
Temperature is 60 DEG C, is condensed back reaction 8h, after temperature is raised to 40 DEG C, teos solution is added, obtains the first reactant
System；After being condensed back reaction 8h, 1.4 ~ 3.6 parts of silane coupling agent KH570 and 29 ~ 31 parts of dehydrated alcohols are taken, is placed in a beaker
It is uniformly mixed, mixed solution is added in the first reaction system with the speed of 1 part/min, stirring rate is increased to 250r/
Min reacts 15min, obtains the second reaction system；By second reaction system 1 ~ 3h of ultrasonic water bath, bath temperature is 50 ~ 80 DEG C,
Supersonic frequency is 80 ~ 100KHz；100 ~ 200 mass parts of dehydrated alcohol are added, is filtered after 3 ~ 6min of agitator treating, takes filter cake and nothing
Water-ethanol is mixed and made into solution, obtains third reaction system；200 mass parts of deionized water are added in third reaction system to stir
It is filtered after mixing 5min, takes filtration cakes torrefaction；Grinding obtains modified manometer silicon dioxide powder granule after drying.
6. a kind of electrolytic capacitor according to claim 1, which is characterized in that the system of the modified manometer silicon dioxide
Preparation Method are as follows: 45 ~ 53 parts of dehydrated alcohols and 8 ~ 8.5 parts of deionized waters is taken to obtain ethanol solution after mixing for use；
Take 45 ~ 51 part of 25% ammonium hydroxide；6.9 ~ 8.7 parts of ethyl orthosilicate and 40 ~ 41 parts of dehydrated alcohol are taken, is uniformly mixed, obtains positive silicon
Acetate solution；Configured ethanol solution and ammonium hydroxide are heated under stiring, speed of agitator 150r/min, temperature
It is 60 DEG C, is condensed back reaction 8h, after temperature is raised to 40 DEG C, teos solution is added, obtains the first reaction system；
After being condensed back reaction 8h, 2 ~ 3.6 parts of silane coupling agent KH570 and 30 ~ 31 parts of dehydrated alcohols are taken, it is equal to be placed in a beaker mixing
It is even, mixed solution is added in the first reaction system with the speed of 1 part/min, stirring rate is increased to 250r/min, is reacted
15min obtains the second reaction system；By second reaction system 2 ~ 3h of ultrasonic water bath, bath temperature is 60 ~ 80 DEG C, supersonic frequency
For 90 ~ 100KHz；150 ~ 200 mass parts of dehydrated alcohol are added, are filtered after 5 ~ 6min of agitator treating, take filter cake and dehydrated alcohol mixed
Solution is made in conjunction, obtains third reaction system；After 200 mass parts of deionized water stirring 5min is added in third reaction system
It filters, takes filtration cakes torrefaction；Grinding obtains modified manometer silicon dioxide powder granule after drying.
7. a kind of electrolytic capacitor according to claim 1, which is characterized in that the system of the modified manometer silicon dioxide
Preparation Method are as follows: 45 parts of dehydrated alcohols and 8 parts of deionized waters is taken to obtain ethanol solution after mixing for use；Take 45 parts
25% ammonium hydroxide；6.9 parts of ethyl orthosilicate and 40 parts of dehydrated alcohol are taken, is uniformly mixed, obtains teos solution；It will match
The ethanol solution and ammonium hydroxide set heat under stiring, speed of agitator 150r/min, and temperature is 60 DEG C, are condensed back anti-
8h is answered, after temperature is raised to 40 DEG C, teos solution is added, obtains the first reaction system；After being condensed back reaction 8h,
The silane coupling agent KH570 and 30 parts of dehydrated alcohols for taking 2.6 parts, be placed in a beaker it is uniformly mixed, by mixed solution with 1 part/min
Speed be added in the first reaction system, stirring rate is increased to 250r/min, 15min is reacted, obtains the second reaction system；
By the second reaction system ultrasonic water bath 2h, bath temperature is 60 DEG C, supersonic frequency 90KHz；150 mass of dehydrated alcohol is added
Part, it is filtered after agitator treating 5min, takes filter cake and dehydrated alcohol to be mixed and made into solution, obtain third reaction system；It is anti-in third
It answers and is filtered after 200 mass parts of deionized water stirring 5min is added in system, take filtration cakes torrefaction；Grinding obtains modified receive after drying
Rice silicon-dioxide powdery particle.
8. a kind of electrolytic capacitor according to claim 1, which is characterized in that during the condensing reflux, rising
During temperature when temperature reaches 40 DEG C, teos solution is added with the speed of 0.5 part/min.
9. a kind of electrolytic capacitor according to claim 1, which is characterized in that the third reaction system takes after filtering
Filter cake is dried, and the mode of the drying is to be dried in vacuo, and 80 DEG C of drying temperature, vacuum degree 0.1MPa, drying time 1h.
10. a kind of electrolytic capacitor according to claim 1, which is characterized in that sieve used in the sieving is 300
~ 500 meshes.
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| CN111640577A (en) * | 2020-05-26 | 2020-09-08 | 广州金立电子有限公司 | Ultrahigh-voltage electrolyte |
| CN112863878A (en) * | 2021-01-06 | 2021-05-28 | 广州金立电子有限公司 | Low-leakage aluminum electrolytic capacitor working electrolyte |
| CN112908708A (en) * | 2021-02-05 | 2021-06-04 | 广州金立电子有限公司 | Working electrolyte of ultrahigh-voltage aluminum electrolytic capacitor |
| CN112908707A (en) * | 2021-02-04 | 2021-06-04 | 广州金立电子有限公司 | High-temperature-resistant capacitor and preparation method thereof |
| CN112908704A (en) * | 2021-02-04 | 2021-06-04 | 广州金立电子有限公司 | Electrolyte of high-temperature-resistant capacitor and capacitor |
| CN112908709A (en) * | 2021-02-05 | 2021-06-04 | 广州金立电子有限公司 | Working electrolyte with high ripple current resistance for capacitor |
| CN112908706A (en) * | 2021-02-04 | 2021-06-04 | 广州金立电子有限公司 | High-reliability capacitor and preparation method thereof |
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Application publication date: 20190212 |