CN102760578B - A kind of capacitor electrolyte and use the capacitor of this electrolyte - Google Patents
A kind of capacitor electrolyte and use the capacitor of this electrolyte Download PDFInfo
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- CN102760578B CN102760578B CN201110107583.4A CN201110107583A CN102760578B CN 102760578 B CN102760578 B CN 102760578B CN 201110107583 A CN201110107583 A CN 201110107583A CN 102760578 B CN102760578 B CN 102760578B
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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
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Abstract
The invention belongs to electrochemical field, the capacitor that it discloses a kind of capacitor electrolyte and has used this electrolyte; Wherein, capacitor electrolyte comprises that mass ratio is ionic liquid and the nano-Ag particles of 1: 0.001～1: 0.01. Electrolyte for capacitor provided by the invention; it is formed by ionic liquid and silver nano-grain hybrid reaction; after ionic liquid and silver nano-grain mix; the existence of silver ion will reduce the internal resistance of electrolyte; and silver ion is reduced into some silver-colored simple substance in charge and discharge process; silver simple substance is relatively stable, can be attached to uniformly in the space of electrode material and reduce the internal resistance of electrode material, thereby greatly reduce the equivalent internal resistance of 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 layer capacitor is a kind of novel energy storage device, has the 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 layer capacitor, electrolyte has a significant impact the accumulate performance of double layer capacitor, is determining the operating voltage range of capacitor, accumulate capacity and operating temperature and working environment.
Ionic liquid is in room temperature or approaches the organic liquid material being made up of ion completely under the condition of room temperature. As a kind of novel electrolyte, the appearance of ionic liquid, has expanded the application of double layer capacitor greatly. The advantages such as it has that electrical conductivity is high, electrochemical window is wide, non-volatile, non-combustible, Heat stability is good. Ionic liquid has good development prospect as the electrolyte of double layer capacitor, but pure ionic liquid capacitance is at ambient temperature not high. Adopt the way of adding organic solvent (acetonitrile, propene carbonate, 1 one butyrolactone) to reach the object 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 as follows:
A kind of electrolyte for capacitor, it is mixed by ionic liquid and nano-Ag particles, and mixes and stir 10～60min and react 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 1:0.005～1:0.01.
Wherein, described ionic liquid is made up of any one anion in glyoxaline cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, acetic acid anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or trifluoroacetyl fluoroform sulfonamide anions; And described glyoxaline cation is the one in 1-butyl-3-methylimidazole cation, 1-propyl group-3-methylimidazole cation, 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 (trimethyl fluoride sulfonyl) imines anion, acetic acid anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or trifluoroacetyl fluoroform sulfonamide anions; And described pyrroles's cation is the one in butyl methyl pyrroles cation, propyl group methylpyrrole cation, 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 double 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 that 1:0.001 is to 1:0.01; After ionic liquid and silver nano-grain mix, silver nano-grain is because surperficial organo-functional group is dissolved in ionic liquid, wherein the silver atoms of part surface becomes silver ion, 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 some silver-colored simple substance in charge and discharge process, silver simple substance is relatively stable, can be attached to uniformly in the space of electrode material and reduce the internal resistance of electrode material, thereby greatly reduce the equivalent internal resistance of double layer capacitor; And silver nano-grain is non-volatile, can as organic additive, not increase inflammable and explosive danger coefficient; Therefore, safety of the present invention, and can greatly reduce the equivalent internal resistance of double layer capacitor.
Brief description of the drawings
Fig. 1 is the ac impedance spectroscopy that adopts the capacitor that the electrolyte in embodiment 1 makes.
Detailed description of the invention
A kind of electrolyte for capacitor, it is mixed by ionic liquid and nano-Ag particles and stirs 10～60min and react 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 1:0.005～1:0.01.
Wherein, described ionic liquid is made up of any one anion in glyoxaline cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, acetic acid anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or trifluoroacetyl fluoroform sulfonamide anions; And described glyoxaline cation is the one in 1-butyl-3-methylimidazole cation, 1-propyl group-3-methylimidazole cation, 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 (trimethyl fluoride sulfonyl) imines anion, acetic acid anion, methylsulfuric acid ester anion, trifluoroacetic acid anion, trifluoromethane sulfonic acid anion, dicyanogen methyl isophorone amine anion or trifluoroacetyl fluoroform sulfonamide anions; And described pyrroles's cation is the one in butyl methyl pyrroles cation, propyl group methylpyrrole cation, 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 double 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 mix, silver nano-grain is because surperficial organo-functional group is dissolved in ionic liquid, wherein the silver atoms of part surface becomes silver ion, 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 some silver-colored simple substance in charge and discharge process, silver simple substance is relatively stable, can be attached to uniformly in the space of electrode material and reduce the internal resistance of electrode material, thereby greatly reduce the equivalent internal resistance of double layer capacitor; And silver nano-grain is non-volatile, can as organic additive, not increase inflammable and explosive danger coefficient; Therefore, safety of the present invention, and can greatly reduce the equivalent internal resistance of double layer capacitor.
In the present invention, the test of equivalent internal resistance: taking Graphene as electrode material, taking each embodiment as electrolyte, be assembled into button cell, utilize CHI660A electrochemical workstation to carry out ac impedance measurement to it, can directly read its equivalent internal resistance from ac impedance spectroscopy.
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
Embodiment 1
In glove box, the 1-butyl-3-methyl imidazolium tetrafluoroborate that is 1:0.01 by mass ratio and silver nano-grain mix. 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.
Test show that the equivalent internal resistance of the double layer capacitor of electrolyte in application the present embodiment is 28 Ω, than the application of pure ionic liquid recording under equal conditions, to make the equivalent internal resistance of double layer capacitor of electrolyte low by 72.5% for 1-butyl-3-methyl imidazolium tetrafluoroborate.
Fig. 1 is the ac impedance spectroscopy that adopts the capacitor that the electrolyte in embodiment 1 makes; Wherein, abscissa is imaginary part, and ordinate is real part; As can be seen from the figure equivalent internal resistance of the present invention is 28 Ω, and the equivalent internal resistance of pure ionic liquid is 102 Ω, equivalent internal resistance of the present invention is lower by 72.5% than the equivalent internal resistance of the pure ionic liquid 1-butyl-3-methyl imidazolium tetrafluoro boric acid salt electrolyte recording under equal conditions.
Embodiment 2～56 is shown in following list:
Note: in table,
1, A represents ionic liquid, and B represents nano-Ag particles;
2, to reduce ratio be in corresponding embodiment to equivalent internal resistance, applies the percentage that the equivalent internal resistance of the double layer capacitor of corresponding embodiment electrolyte reduces than the equivalent internal resistance of the application of pure ionic liquid double layer capacitor recording under equal conditions;
3,, in embodiment 2～56, various preparation technology's flow processs and test condition are identical with embodiment 1.
Should be understood that, the above-mentioned statement for preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, and scope of patent protection of the present invention should be as the criterion with claims.
Claims (2)
1. a capacitor electrolyte, is characterized in that, this electrolyte comprises ionic liquid and Nano SilverParticle, the mass ratio of described ionic liquid and nano-Ag particles is 1:0.01;
Described ionic liquid is 1-propyl group-3-N-Methylimidazoleacetic salt.
2. a capacitor, is characterized in that, this capacitor comprises electrolyte claimed in claim 1.
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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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| CN102760578A CN102760578A (en) | 2012-10-31 |
| CN102760578B true CN102760578B (en) | 2016-05-18 |
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Cited By (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 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103258655B (en) * | 2013-05-10 | 2016-02-24 | 渤海大学 | A kind of preparation method of electric field activated form ultracapacitor |
| CN109036872B (en) * | 2018-07-20 | 2021-06-01 | 安徽旭峰电容器有限公司 | Capacitor electrolyte with low internal resistance |
| CN111540608A (en) * | 2020-05-20 | 2020-08-14 | 湖南城市学院 | Filter capacitor for new energy automobile |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Non-Patent Citations (2)
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| F-L Chen 等.CuC nanoparticles dispersed RTILs used in the DSSC electrolyte.《Nuclear Instruments and Methods in Physics Research A》.2010,第619卷(第1-3期),第112-114页. * |
| 含Cu2+离子液体电解液电化学电容器的电化学性能研究;孙国华等;《第八届全国新型炭材料学术研讨会论文集》;20080901;第665-670页 * |
Cited By (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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