CN102074364A - Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof - Google Patents
Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN102074364A CN102074364A CN2010106159973A CN201010615997A CN102074364A CN 102074364 A CN102074364 A CN 102074364A CN 2010106159973 A CN2010106159973 A CN 2010106159973A CN 201010615997 A CN201010615997 A CN 201010615997A CN 102074364 A CN102074364 A CN 102074364A
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Abstract
The invention provides a method for preparing an electrolyte for a chip aluminum electrolytic capacitor. The method comprises the following steps of: (1) weighing: weighing raw materials; (2) dissolving: adding ethylene glycol into a container with a stirrer and a thermometer, raising the temperature to 60 DEG C by using a closed electric heater, sequentially adding polyethylene glycol, 1,7-ammonium-sebacate, ammonium sebacate, 1,7-dimethyl-ammonium-sebacate, mannitol, ammonium hypophosphite, paranitrobenzoic acid or para-nitrophenyl methanol, and oxirane and epoxypropane copolyether, heating to 130 DEG C, and stirring to totally dissolve the components; and (3) cooling: standing and cooling to room temperature to obtain the electrolyte. The technology is simple, the condition is easy to control, and the preparation method is suitable for scale production. The invention also provides an electrolyte which has the characteristics of high temperature resistance, high spark voltage and long service life, and is applicable for making the chip aluminum electrolytic capacitor.
Description
Technical field
The present invention relates to technical field of electrochemistry, relate to preparation method and the electrolyte of a kind of sheet type aluminum electrolytic capacitor especially with electrolyte.
Background technology
Aluminium electrolytic capacitor has the incomparable superiority of other capacitor.Its capacity is big, low production cost, good reliability, is widely used in multiple electrical equipment such as TV.Although it is had the capacitor of various function admirables on market, to sell at present, still in the ascendant to research novel, high performance capacitor.Sheet type aluminum electrolytic capacitor belongs to the expensive goods in the electrolytic capacitor, and it is electrolyte with the high molecular polymer, adopts surface mounting technology mount components (electronic element) during application often, and this just has very high requirement to the heat-resisting quantity of electrolyte.Some factors can cause that electrochemical capacitor lost efficacy, as extremely low temperature, and electric capacity temperature rise (welding temperature, ambient temperature, AC ripple), too high voltage, instantaneous voltage, very high frequency(VHF) or reverse bias; Wherein temperature rise is the factor that electrochemical capacitor working life (Lop) is had the greatest impact.Circuit board adds heat request electrolyte in reflow ovens can bear the highest 250 ℃ of short time test, and can not cause the outward appearance distortion, and performance degradation is especially avoided outer casing rupture and leakage.The technical barrier of aluminium electrolytic capacitor chip type: electrolyte will stand up to high temperature more than 125 ℃.
Summary of the invention
The object of the present invention is to provide a kind of preparation method and electrolyte of high temperature resistant, long-life aluminum electrolytic capacitor electrolyte.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of sheet type aluminum electrolytic capacitor preparation method of electrolyte comprises following processing step:
(1) weighing: raw materials weighing;
(2) dissolving: main solvent is joined in the container that has blender and thermometer, heat up, add secondary solvent, auxiliary solute, main solute, methanol auxiliary agent, flash over voltage improving agent more successively, be heated to 130 ℃, be stirred to molten entirely with the sealing electric heater;
(3) cooling: place and be cooled to room temperature, get electrolyte.
Described step (2) also comprises: will ethylene glycol be warmed up to 60 ℃ with the sealing electric heater, and add other raw material components again.
Described methanol auxiliary agent addition sequence is: sweet mellow wine, ammonium hypophosphite, paranitrobenzoic acid or p-nitrophenyl methyl alcohol.
With the electrolyte that the preparation method of electrolyte makes, comprise that following parts by weight of raw materials forms by above-mentioned sheet type aluminum electrolytic capacitor:
Solvent 60-70
Secondary solvent 2-10
Main solute 9-15
Auxiliary solute 1-5
Hydrogen agent 1-6 disappears
Methanol auxiliary agent 0-4
Flash over voltage improving agent 0-2
Described solvent comprises the polyethylene glycol that occupies 60-70 weight portion ethylene glycol and 2-10 weight portion.
Described main solute is a side chain dicarboxylic acids ammonium.
Described side chain dicarboxylic acids is 1,7-dimethyl-ammonium sebacate.
Described auxiliary solute is any one or two kinds of of 1,7 ammonium sebacate, ammonium sebacate.
Described methanol auxiliary agent comprises: any one or more of p-nitrophenyl methyl alcohol, sweet mellow wine, ammonium hypophosphite.
Described flash over voltage improving agent is an oxirane expoxy propane copolyether.
The beneficial effect of the invention
Electrolyte of the present invention has good electrochemical properties, has high temperature resistantly, and high flash over voltage, leakage current are low.
The present invention adopts the side chain dicarboxylic acids as solute: have higher solubility, low resistance, low-temperature electrolyte and be difficult for crystallization.
The present invention adopts sweet mellow wine, and the hydroxyl of sweet mellow wine is very strong to the attraction of hydrone, can suppress and eliminate the capacitor internal pressure rising that moisture causes.
The present invention adopts the hydrogen agent-aromatic nitro compound that disappears, because groups such as nitro and aromatic rings have the inductive effect and the conjugation of stronger attract electrons ability, cloud density on the nitro is increased,, following reaction promptly takes place eliminate hydrogen in case there is hydrogen ion to occur:
The methanol auxiliary agent ammonium hypophosphite that the present invention adopts is the stronger inorganic compound of a kind of reproducibility, in case during the dielectric oxide film damage, under effect of electric field, H
2PO
2 -Anode moves, and generates PO in anodic oxidation
4 3-, and Al direct and that anodic solution gets off
3+Be combined to AlPO
4Be attached on the deielectric-coating, prevent that aquation from further producing, and H
2PO
2 -Volume is little, and the small pit that can be deep into anode is internalized into AlPO
4, deielectric-coating is repaired rapidly, leakage current is reduced, thereby improved the formation ability and the flash over voltage of electrolyte.
Below in conjunction with embodiment, the present invention is further described.
Embodiment
Embodiment 1
A kind of sheet type aluminum electrolytic capacitor preparation method of electrolyte may further comprise the steps:
(1) weighing: according to following prescription raw materials weighing;
Table 1
Composition weight (g)
Ethylene glycol 69
Polyethylene glycol 10
1,7-dimethyl-ammonium sebacate 9
1,7 ammonium sebacate: 3
Ammonium sebacate: 2
Aromatic nitro compound 2
P-nitrophenyl methyl alcohol 2
Sweet mellow wine 1
Ammonium hypophosphite 1
Oxirane expoxy propane copolyether 1
(2) dissolving: ethylene glycol is joined in the container that has blender and thermometer, be warmed up to 60 ℃ with the sealing electric heater, add polyethylene glycol, 1 successively, 7 ammonium sebacates, ammonium sebacate, 1,7-dimethyl-ammonium sebacate, sweet mellow wine, ammonium hypophosphite, paranitrobenzoic acid or p-nitrophenyl methyl alcohol, oxirane expoxy propane copolyether, be heated to 130 ℃, be stirred to molten entirely;
(3) cooling: place and be cooled to room temperature, get electrolyte.
Embodiment 2, implement 3 substantially the same manner as Example 1ly, its difference is that raw material forms differently, sees Table 2.
Table 2
The foregoing description electrolyte is prepared 400V respectively, 450V, 5 of the sheet type aluminum electrolytic capacitors of 470V, test capacitors performance, result: all can bear 125 ℃, load delivery more than 2000 hours.
The present invention is not limited to above-mentioned execution mode, and every all execution modes that are equal to that can realize the object of the invention are all within protection scope of the present invention.
Claims (10)
1. the preparation method of a sheet type aluminum electrolytic capacitor usefulness electrolyte is characterized in that, comprises following processing step:
(1) weighing: raw materials weighing;
(2) dissolving: main solvent is joined in the container that has blender and thermometer, heat up, add secondary solvent, auxiliary solute, main solute, methanol auxiliary agent, flash over voltage improving agent more successively, be heated to 130 ℃, be stirred to molten entirely with the sealing electric heater;
(3) cooling: place and be cooled to room temperature, get electrolyte.
2. sheet type aluminum electrolytic capacitor according to claim 1 is characterized in that described step (2) also comprises: will ethylene glycol be warmed up to 60 ℃ with the sealing electric heater, and add other raw material components again with the preparation method of electrolyte.
3. sheet type aluminum electrolytic capacitor according to claim 1 is characterized in that with the preparation method of electrolyte described methanol auxiliary agent addition sequence is: sweet mellow wine, ammonium hypophosphite, paranitrobenzoic acid or p-nitrophenyl methyl alcohol.
One kind by the described sheet type aluminum electrolytic capacitor of claim 1 with the electrolyte that the preparation method of electrolyte makes, it is characterized in that, comprise that following parts by weight of raw materials forms:
Solvent 60-70
Secondary solvent 2-10
Main solute 9-15
Auxiliary solute 1-5
Hydrogen agent 1-6 disappears
Methanol auxiliary agent 0-4
Flash over voltage improving agent 0-2
5. electrolyte according to claim 4 is characterized in that, described solvent comprises the polyethylene glycol that occupies 60-70 weight portion ethylene glycol and 2-10 weight portion.
6. electrolyte according to claim 4 is characterized in that, described main solute is a side chain dicarboxylic acids ammonium.
7. electrolyte according to claim 6 is characterized in that, described side chain dicarboxylic acids is 1,7-dimethyl-ammonium sebacate.
8. electrolyte according to claim 4 is characterized in that, described auxiliary solute is any one or two kinds of of 1,7 ammonium sebacate, ammonium sebacate.
9. electrolyte according to claim 4 is characterized in that, described methanol auxiliary agent comprises: any one or more of p-nitrophenyl methyl alcohol, sweet mellow wine, ammonium hypophosphite.
10. electrolyte according to claim 4 is characterized in that, described flash over voltage improving agent is an oxirane expoxy propane copolyether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106159973A CN102074364A (en) | 2010-12-27 | 2010-12-27 | Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106159973A CN102074364A (en) | 2010-12-27 | 2010-12-27 | Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof |
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| CN102074364A true CN102074364A (en) | 2011-05-25 |
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| CN2010106159973A Pending CN102074364A (en) | 2010-12-27 | 2010-12-27 | Electrolyte for chip aluminum electrolytic capacitor and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723203A (en) * | 2012-07-11 | 2012-10-10 | 湖南飞翔电子有限责任公司 | Preparation method of electrolyte for aluminum electrolytic capacitor |
| CN104282439A (en) * | 2014-10-29 | 2015-01-14 | 福建云星电子有限公司 | Boric-acid-system-free electrolyte and preparation method thereof |
| CN104538182A (en) * | 2014-12-10 | 2015-04-22 | 南通瑞达电子材料有限公司 | Electrolyte for medium and low voltage of electrolytic capacitor and preparation method of electrolyte |
| CN106449113A (en) * | 2016-08-31 | 2017-02-22 | 湖南艾华集团股份有限公司 | Thermo-cured gel-state electrolytic solution for aluminium electrolytic capacitor and preparation method for thermo-cured gel-state electrolytic solution |
| CN109003834A (en) * | 2018-07-20 | 2018-12-14 | 安徽旭峰电容器有限公司 | A kind of supercapacitor high-voltage electrolyte |
| CN109216032A (en) * | 2018-09-18 | 2019-01-15 | 益阳市锦汇电子有限公司 | A kind of low-corrosiveness electrolyte for electrolytic capacitor and preparation method thereof |
| CN111091972A (en) * | 2019-12-02 | 2020-05-01 | 湖南艾华集团股份有限公司 | Manufacturing method of charge-discharge-resistant solid-state aluminum electrolytic capacitor |
| CN111247612A (en) * | 2017-10-31 | 2020-06-05 | 松下知识产权经营株式会社 | Electrolytic capacitor |
-
2010
- 2010-12-27 CN CN2010106159973A patent/CN102074364A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723203A (en) * | 2012-07-11 | 2012-10-10 | 湖南飞翔电子有限责任公司 | Preparation method of electrolyte for aluminum electrolytic capacitor |
| CN104282439A (en) * | 2014-10-29 | 2015-01-14 | 福建云星电子有限公司 | Boric-acid-system-free electrolyte and preparation method thereof |
| CN104538182A (en) * | 2014-12-10 | 2015-04-22 | 南通瑞达电子材料有限公司 | Electrolyte for medium and low voltage of electrolytic capacitor and preparation method of electrolyte |
| CN106449113A (en) * | 2016-08-31 | 2017-02-22 | 湖南艾华集团股份有限公司 | Thermo-cured gel-state electrolytic solution for aluminium electrolytic capacitor and preparation method for thermo-cured gel-state electrolytic solution |
| CN111247612A (en) * | 2017-10-31 | 2020-06-05 | 松下知识产权经营株式会社 | Electrolytic capacitor |
| CN109003834A (en) * | 2018-07-20 | 2018-12-14 | 安徽旭峰电容器有限公司 | A kind of supercapacitor high-voltage electrolyte |
| CN109216032A (en) * | 2018-09-18 | 2019-01-15 | 益阳市锦汇电子有限公司 | A kind of low-corrosiveness electrolyte for electrolytic capacitor and preparation method thereof |
| CN111091972A (en) * | 2019-12-02 | 2020-05-01 | 湖南艾华集团股份有限公司 | Manufacturing method of charge-discharge-resistant solid-state aluminum electrolytic capacitor |
| CN111091972B (en) * | 2019-12-02 | 2022-03-01 | 湖南艾华集团股份有限公司 | Manufacturing method of charge-discharge-resistant solid-state aluminum electrolytic capacitor |
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Application publication date: 20110525 |