CN102760578A - Electrolyte for capacitor and capacitor using electrolyte - Google Patents
Electrolyte for capacitor and capacitor using electrolyte Download PDFInfo
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- CN102760578A CN102760578A CN2011101075834A CN201110107583A CN102760578A CN 102760578 A CN102760578 A CN 102760578A CN 2011101075834 A CN2011101075834 A CN 2011101075834A CN 201110107583 A CN201110107583 A CN 201110107583A CN 102760578 A CN102760578 A CN 102760578A
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- 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
Abstract
The invention belongs to the field of electrochemistry and discloses an electrolyte for a capacitor and the capacitor using the electrolyte. The electrolyte comprises ionic liquid and nano-silver particles in a mass ratio of (1:0.001)-(1:0.01). The electrolyte has the following beneficial effects that the electrolyte is prepared through the mixture and reaction of the ionic liquid and the nano-silver particles; and after the ionic liquid and the nano-silver particles are mixed, the internal resistance of the electrolyte is reduced in the presence of silver ions, and the silver ions are partially reduced to silver simple substances in the charge-discharge process and the silver simple substances are relatively stable and can uniformly attach to the gaps of electrode materials to reduce the internal resistance of the electrode materials, thus greatly reducing the equivalent internal resistance of the electrical double layer capacitor.
Description
Technical field
The present invention relates to electrochemical field, relate in particular to a kind of capacitor electrolyte.This invention also relates to a kind of capacitor that uses this electrolyte.
Background technology
Double electric layer capacitor is a kind of novel energy storage device, has advantages such as high power density, high cycle life, fast charging and discharging performance be good, is widely used in the AC-battery power source of military field, device for mobile communication, computer and electric automobile etc.As the important component part of double electric layer capacitor, electrolyte has very big influence to the accumulate performance of double electric layer capacitor, is determining the operating voltage range of capacitor, accumulate capacity and working temperature and operational environment.
Ionic liquid is in room temperature or the organic liquid material of being made up of ion fully under near the condition of room temperature.As a kind of novel electrolyte, the application of double electric layer capacitor has been expanded in ion liquid appearance greatly.It has advantages such as conductivity height, electrochemical window are wide, non-volatile, not flammable, Heat stability is good.Ionic liquid has bright development prospect as the electrolyte of double electric layer capacitor, yet pure ionic liquid capacitance at ambient temperature is not high.Adopt the way of adding organic solvent (acetonitrile, propene carbonate, 1 one butyrolactone) to reach the purpose that improves capacitance, but make capacitor in use increase inflammable and explosive danger coefficient.
Summary of the invention
The object of the present invention is to provide a kind of safe and reliable, cost is low, and can improve the electrolyte of capacitor specific capacity.
Technical scheme of the present invention is following:
A kind of electrolyte for capacitor, it is mixed by ionic liquid and nano-Ag particles, and mixes and stir 10～60min reaction and form, and the mass ratio of ionic liquid and nano-Ag particles is 1: 0.001～1: 0.01; The mass ratio of preferred ion liquid and nano-Ag particles is preferably 1: 0.005～and 1: 0.01.
Wherein, described ionic liquid is made up of any one anion in glyoxaline cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions; And described glyoxaline cation is a kind of in 1-butyl-3-methylimidazole cation, 1-propyl group-3-methylimidazole cation, the 1-ethyl-3-methylimidazole cation.
Wherein, described ionic liquid is made up of any one anion in pyrroles's cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions; And described pyrroles's cation is a kind of in butyl methyl pyrroles cation, propyl group methylpyrrole cation, the ethyl-methyl pyrroles cation.
Wherein, ionic liquid is 1-butyl-3-methyl imidazolium tetrafluoroborate or butyl methyl pyrroles tetrafluoroborate.
Another object of the present invention is to provide a kind of capacitor that uses above-mentioned electrolyte, this capacitor is a double electric layer capacitor.
Electrolyte for capacitor provided by the invention, it is formed by ionic liquid and silver nano-grain hybrid reaction, and the mass ratio of ionic liquid and silver nano-grain is 1: 0.001 to 1: 0.01; After ionic liquid and silver nano-grain mixed, silver nano-grain was because the organo-functional group on surface is dissolved in the ionic liquid, and wherein part surface becomes silver ion because of the courtyard; On the one hand, the existence of silver ion will reduce the internal resistance of electrolyte, on the other hand; Silver ion is reduced into silver-colored simple substance with some in charge and discharge process; Silver simple substance is relatively stable, can be uniformly attached to reducing the internal resistance of electrode material in the space of electrode material, thereby reduce the equivalent internal resistance of double electric layer capacitor greatly; And silver nano-grain is non-volatile, can not increase inflammable and explosive danger coefficient as organic additive; Therefore, safety of the present invention, and can reduce the equivalent internal resistance of double electric layer capacitor greatly.
Description of drawings
The ac impedance spectroscopy of the capacitor that Fig. 1 makes for the electrolyte that adopts among the embodiment 1.
Embodiment
A kind of electrolyte for capacitor, it is mixed by ionic liquid and nano-Ag particles and stirs 10～60min reaction and forms, and the mass ratio of ionic liquid and nano-Ag particles is 1: 0.001～1: 0.01; The mass ratio of preferred ion liquid and nano-Ag particles is preferably 1: 0.005～and 1: 0.01.
Wherein, described ionic liquid is made up of any one anion in glyoxaline cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions; And described glyoxaline cation is a kind of in 1-butyl-3-methylimidazole cation, 1-propyl group-3-methylimidazole cation, the 1-ethyl-3-methylimidazole cation.
Wherein, described ionic liquid is made up of any one anion in pyrroles's cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions; And described pyrroles's cation is a kind of in butyl methyl pyrroles cation, propyl group methylpyrrole cation, the ethyl-methyl pyrroles cation.
Wherein, ionic liquid is 1-butyl-3-methyl imidazolium tetrafluoroborate or butyl methyl pyrroles tetrafluoroborate.
Another object of the present invention is to provide a kind of capacitor that uses above-mentioned electrolyte, this capacitor is a double electric layer capacitor.
Electrolyte for capacitor provided by the invention, it is formed by ionic liquid and silver nano-grain hybrid reaction, and the mass ratio of ionic liquid and silver nano-grain is 1: 0.001～1: 0.01; After ionic liquid and silver nano-grain mixed, silver nano-grain was because the organo-functional group on surface is dissolved in the ionic liquid, and wherein part surface becomes silver ion because of the courtyard; On the one hand, the existence of silver ion will reduce the internal resistance of electrolyte, on the other hand; Silver ion is reduced into silver-colored simple substance with some in charge and discharge process; Silver simple substance is relatively stable, can be uniformly attached to reducing the internal resistance of electrode material in the space of electrode material, thereby reduce the equivalent internal resistance of double electric layer capacitor greatly; And silver nano-grain is non-volatile, can not increase inflammable and explosive danger coefficient as organic additive; Therefore, safety of the present invention, and can reduce the equivalent internal resistance of double electric layer capacitor greatly.
Among the present invention, the test of equivalent internal resistance: with the Graphene is electrode material, is electrolyte with each embodiment, is assembled into button cell, utilizes the CHI660A electrochemical workstation that it is carried out ac impedance measurement, and its equivalent internal resistance is directly read by section from ac impedance spectroscopy.
Below in conjunction with accompanying drawing, further explain is done in preferred embodiment of the present invention.
In glove box, be 1-butyl-3-methyl imidazolium tetrafluoroborate and the silver nano-grain mixing of 1:0.01 with mass ratio.10min after stirring a period of time, silver nano-grain is dissolved in 1-butyl-3-methyl imidazolium tetrafluoroborate, obtains a kind of electrolyte solution for electric double layer capacitor.
It is 28 Ω that test draws the equivalent internal resistance of using the double electric layer capacitor of electrolyte in the present embodiment; Than the application of pure ionic liquid that records under the equal conditions, promptly 1-butyl-3-methyl imidazolium tetrafluoroborate is made the equivalent internal resistance low 72.5% of the double electric layer capacitor of electrolyte.
The ac impedance spectroscopy of the capacitor that Fig. 1 makes for the electrolyte that adopts among the embodiment 1; Wherein, abscissa is an imaginary part, and ordinate is a real part; Equivalent internal resistance as can be seen from the figure of the present invention is 28 Ω; And pure ion liquid equivalent internal resistance is 102 Ω, and equivalent internal resistance of the present invention is than the equivalent internal resistance low 72.5% of the pure ionic liquid 1-butyl-3-methyl imidazolium tetrafluoroborate electrolyte that records under the equal conditions.
Embodiment 2～56 states list as follows:
Annotate: in the table,
1, A representes ionic liquid, and B representes nano-Ag particles;
2, to reduce ratio be among the corresponding embodiment to equivalent internal resistance, uses the percentage that the equivalent internal resistance of the double electric layer capacitor of corresponding embodiment electrolyte reduces than the equivalent internal resistance of the application of pure ionic liquid double electric layer capacitor that records under the equal conditions;
3, among the embodiment 2～56, various preparation technology's flow processs are identical with embodiment 1 with test condition.
Should be understood that above-mentioned statement to preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with accompanying claims.
Claims (9)
1. a capacitor electrolyte is characterized in that, this electrolyte comprises ionic liquid and nano-Ag particles, and the mass ratio of said ionic liquid and nano-Ag particles is 1: 0.001～1: 0.01.
2. capacitor electrolyte according to claim 1 is characterized in that, the mass ratio of said ionic liquid and nano-Ag particles is 1: 0.005～1: 0.01.
3. capacitor electrolyte according to claim 1; It is characterized in that said ionic liquid is the ionic liquid that any one anion in glyoxaline cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions is formed.
4. capacitor electrolyte according to claim 3 is characterized in that, said glyoxaline cation is any in 1-butyl-3-methylimidazole cation, 1-propyl group-3-methylimidazole cation or 1-ethyl-3-methylimidazole cation.
5. capacitor electrolyte according to claim 1; It is characterized in that said ionic liquid is the ionic liquid that any one anion in pyrroles's cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trifluoromethyl sulphonyl) imines anion, acetate anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or the trifluoroacetyl fluoroform sulfonamide anions is formed.
6. capacitor electrolyte according to claim 5 is characterized in that, said pyrroles's cation is any in butyl methyl pyrroles cation, propyl group methylpyrrole cation or the ethyl-methyl pyrroles cation.
7. capacitor electrolyte according to claim 1 is characterized in that, said ionic liquid is 1-butyl-3-methyl imidazolium tetrafluoroborate.
8. capacitor electrolyte according to claim 1 is characterized in that, said ionic liquid is a butyl methyl pyrroles tetrafluoroborate.
9. a capacitor is characterized in that, this capacitor comprises the arbitrary described electrolyte of claim 1 to 8.
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| CN201110107583.4A CN102760578B (en) | 2011-04-27 | 2011-04-27 | A kind of capacitor electrolyte and use the capacitor of this electrolyte |
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| CN201110107583.4A CN102760578B (en) | 2011-04-27 | 2011-04-27 | A kind of capacitor electrolyte and use the capacitor of this electrolyte |
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| CN102760578B CN102760578B (en) | 2016-05-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103258655A (en) * | 2013-05-10 | 2013-08-21 | 渤海大学 | Method for preparing electric field activation type super capacitors |
| CN103833621A (en) * | 2012-11-26 | 2014-06-04 | 海洋王照明科技股份有限公司 | Pyrrole ionic liquid, and preparation method and application thereof |
| CN109036872A (en) * | 2018-07-20 | 2018-12-18 | 安徽旭峰电容器有限公司 | A kind of capacitor electrolyte of low internal resistance |
| CN111540608A (en) * | 2020-05-20 | 2020-08-14 | 湖南城市学院 | Filter capacitor for new energy automobile |
| CN116404256A (en) * | 2023-05-31 | 2023-07-07 | 宁德时代新能源科技股份有限公司 | Electrolyte, battery monomer, battery and electric equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN101131887A (en) * | 2007-07-17 | 2008-02-27 | 中国科学院山西煤炭化学研究所 | Ionic liquid containing cupric salt and method for preparing the same |
| CN101228602A (en) * | 2005-07-29 | 2008-07-23 | 广荣化学工业株式会社 | Electrochemical device |
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| CN101228602A (en) * | 2005-07-29 | 2008-07-23 | 广荣化学工业株式会社 | Electrochemical device |
| CN101131887A (en) * | 2007-07-17 | 2008-02-27 | 中国科学院山西煤炭化学研究所 | Ionic liquid containing cupric salt and method for preparing the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833621A (en) * | 2012-11-26 | 2014-06-04 | 海洋王照明科技股份有限公司 | Pyrrole ionic liquid, and preparation method and application thereof |
| CN103833621B (en) * | 2012-11-26 | 2016-08-03 | 海洋王照明科技股份有限公司 | Pyrrole ionic liquid and its preparation method and application |
| CN103258655A (en) * | 2013-05-10 | 2013-08-21 | 渤海大学 | Method for preparing electric field activation type super capacitors |
| CN103258655B (en) * | 2013-05-10 | 2016-02-24 | 渤海大学 | A kind of preparation method of electric field activated form ultracapacitor |
| CN109036872A (en) * | 2018-07-20 | 2018-12-18 | 安徽旭峰电容器有限公司 | A kind of capacitor electrolyte of low internal resistance |
| CN111540608A (en) * | 2020-05-20 | 2020-08-14 | 湖南城市学院 | Filter capacitor for new energy automobile |
| CN116404256A (en) * | 2023-05-31 | 2023-07-07 | 宁德时代新能源科技股份有限公司 | Electrolyte, battery monomer, battery and electric equipment |
| CN116404256B (en) * | 2023-05-31 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Electrolyte, battery monomer, battery and electric equipment |
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| CN102760578B (en) | 2016-05-18 |
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