CN103515118A - Electrolyte for double-electric-layer capacitor - Google Patents
Electrolyte for double-electric-layer capacitor Download PDFInfo
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- CN103515118A CN103515118A CN201210218411.9A CN201210218411A CN103515118A CN 103515118 A CN103515118 A CN 103515118A CN 201210218411 A CN201210218411 A CN 201210218411A CN 103515118 A CN103515118 A CN 103515118A
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- layer capacitor
- ionic liquid
- trimethyl silane
- alkyl trimethyl
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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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- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention belongs to the field of electrochemistry, and discloses an electrolyte for a double-electric-layer capacitor. The electrolyte for the double-electric-layer capacitor comprises pyridines ionic liquid and alkyl trimethyl silane, and the molar ratio of the pyridines ionic liquid and the alkyl trimethyl silane is 1:0.001-1:0.05. According to the electrolyte for the double-electric-layer capacitor, the affinity of the pyridines ionic liquid and diaphragm materials such as PP and PE is small due to high viscosity and large surface tension of the pyridines ionic liquid, so that the equivalent internal resistance of the double-electric-layer capacitor with the pure pyridines ionic liquid being used as the electrolyte is large, after the alkyl trimethyl silane is added in the pyridines ionic liquid, due to the fact that the alkyl trimethyl silane is a nonionic surface active agent, the alkyl trimethyl silane can increase the affinity of the pyridines ionic liquid and the diaphragm materials such as the PP and the PE commonly used for capacitors, and the equivalent internal resistance of the double-electric-layer capacitor is greatly lowered. Therefore, the equivalent internal resistance of the double-electric-layer capacitor is greatly lowered.
Description
Technical field
The present invention relates to electrochemical field, relate in particular to a kind of electrolyte solution for electric double layer capacitor.
Background technology
Double electric 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 electric layer capacitor, electrolyte has a significant impact the accumulate performance of double electric layer capacitor, is determining the equivalent internal resistance of capacitor, operating voltage range, accumulate capacity and working temperature and operational environment.
Ionic liquid is in room temperature or approaches the organic liquid material being comprised 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 electric layer capacitor greatly.Pyridines ionic liquid is one of il electrolyte of recent development, yet, pyridines viscosity of il is high, with PP(polypropylene), PE(polyethylene) etc. compatibility little, the equivalent internal resistance of double electric layer capacitor that makes to do with pure pyridine class ionic liquid electrolyte is bigger than normal.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of electrolyte solution for electric double layer capacitor.
Technical scheme of the present invention is as follows:
, comprise pyridines ionic liquid and alkyl trimethyl silane; The mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.001 ~ 1:0.05.
Described electrolyte solution for electric double layer capacitor, preferably, the mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.005 ~ 1:0.05; Or further preferred, the mol ratio of pyridines ionic liquid and alkyl trimethyl silane is 1:0.005 ~ 1:0.05; Or further preferred, the mol ratio of pyridines ionic liquid and alkyl trimethyl silane is 1:0.03 ~ 1:0.05; Or most preferably, the mol ratio of pyridines ionic liquid and alkyl trimethyl silane is 1:0.04.
When described pyridines ionic liquid and alkyl trimethyl silane mixture, need to constantly stir, mixing time is 10 ~ 60 minutes, preferably, and mixing time 30 minutes.
Described electrolyte solution for electric double layer capacitor, wherein, described pyridines ionic liquid any one anion in pyridines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion and trifluoromethane sulfonic acid anion forms.
Described electrolyte solution for electric double layer capacitor, wherein, described pyridines cation is propyl group pyridylium, butyl-pyridinium cation or pentyl pyridine cation.
Described electrolyte solution for electric double layer capacitor, wherein, described alkyl trimethyl silane is tridecyl trimethyl silane, dodecyl triethyl silicane, pentadecyl trimethyl silane or cetyl trimethyl silane.
Pyridines ionic liquid kind comprises as follows:
1, propyl group pyridinium tetrafluoroborate salt, propyl group pyridine hexafluorophosphate, propyl group pyridine two (trimethyl fluoride sulfonyl) inferior amine salt, propyl group pyridine trifluoroacetate, propyl group pyridine trifluoromethyl sulfonic acid;
2, butyl-pyridinium tetrafluoroborate, butyl-pyridinium hexafluorophosphate, butyl-pyridinium two (trimethyl fluoride sulfonyl) inferior amine salt, butyl-pyridinium trifluoroacetate, butyl-pyridinium trifluoromethyl sulfonic acid;
3, pentyl pyridine tetrafluoroborate, pentyl pyridine hexafluorophosphate, pentyl pyridine two (trimethyl fluoride sulfonyl) inferior amine salt, pentyl pyridine trifluoroacetate, pentyl pyridine trifluoromethyl sulfonic acid.
The invention provides a kind of electrolyte solution for electric double layer capacitor, it is formed by pyridines ionic liquid and alkyl trimethyl silane mixture, pyridines ionic liquid is because viscosity is high, surface tension is large, with PP, the compatibility of the diaphragm materials such as PE is little, the equivalent internal resistance of double electric layer capacitor that makes to do with pure pyridine class ionic liquid electrolyte is bigger than normal, add alkyl trimethyl silane in pyridines ionic liquid after, because alkyl trimethyl silane is a kind of non-ionic surface active agent, it can increase pyridines ionic liquid and PP, the compatibility of the conventional diaphragm material of the capacitors such as PE, thereby greatly reduce the equivalent internal resistance of double electric layer capacitor, thereby greatly reduce the equivalent internal resistance of double electric layer capacitor.
Accompanying drawing explanation
Fig. 1 is for adopting the electrolyte solution for electric double layer capacitor double electric layer capacitor that is electrolyte and the ac impedance spectroscopy that adopts the double electric layer capacitor that pure ionic liquid propyl group pyridinium tetrafluoroborate salt is electrolyte making in embodiment 1; Wherein, abscissa is real part, and ordinate is imaginary part (it is the plural number that processing draws through Mathematical Modeling that AC impedance is measured the data of coming, and ac impedance spectroscopy is complex number plane figure, and real part and imaginary part be real part and the imaginary part of corresponding Mathematical Modeling respectively).
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
In following each embodiment, the test of equivalent internal resistance: take Graphene as electrode material, the electrolyte solution for electric double layer capacitor that each embodiment makes of take is electrolyte, is assembled into capacitor, be button cell, utilize CHI660A electrochemical workstation to carry out ac impedance measurement to it.
Embodiment 1
In glove box, by mol ratio, be 1:0.04, be propyl group pyridinium tetrafluoroborate salt and the mixing of tridecyl trimethyl silane that molal quantity is respectively 5mol and 0.2mol, stir after 30 minutes, tridecyl trimethyl silane is dispersed in propyl group pyridinium tetrafluoroborate salt, obtains electrolyte solution for electric double layer capacitor.
Fig. 1 is for adopting the electrolyte solution for electric double layer capacitor double electric layer capacitor (barrier film of this capacitor adopts PP material) that is electrolyte and the ac impedance spectroscopy that adopts the double electric layer capacitor that pure ionic liquid propyl group pyridinium tetrafluoroborate salt is electrolyte making in embodiment 1; Wherein, abscissa is real part, and ordinate is imaginary part (it is the plural number that processing draws through Mathematical Modeling that AC impedance is measured the data of coming, and ac impedance spectroscopy is complex number plane figure, and real part and imaginary part be real part and the imaginary part of corresponding Mathematical Modeling respectively).
As can be seen from Figure 1, the double electric layer capacitor that the electrolyte solution for electric double layer capacitor that the embodiment 1 of take makes is electrolyte, its equivalent internal resistance is 106 Ω, and the double electric layer capacitor that propyl group pyridinium tetrafluoroborate salt is electrolyte, its equivalent internal resistance is 134 Ω; Therefore, the equivalent internal resistance of embodiment 1 is lower by 20.9% than the equivalent internal resistance of the pure ionic liquid propyl group pyridinium tetrafluoroborate salt electrolyte recording under equal conditions.
Embodiment 2-20 is shown in following list:
Note: in table,
1, A represents ionic liquid, and B represents alkyl trimethyl silane; A:B Table A and B molal quantity separately, as, A:B is 2:0.08, represents that the molal quantity of A is 2mol, the molal quantity of B is 0.08mol;
2, the ratio that equivalent internal resistance reduces is in corresponding embodiment, and the equivalent internal resistance of the double electric layer capacitor of application the present embodiment electrolyte does not add the percentage that the equivalent internal resistance of the ionic liquid double electric layer capacitor of alkyl trimethyl silane reduces than the application recording under equal conditions;
3,, in embodiment 2 ~ 20, 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 (8)
1. an electrolyte solution for electric double layer capacitor, is characterized in that, comprises pyridines ionic liquid and alkyl trimethyl silane; The mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.001 ~ 1:0.05.
2. electrolyte solution for electric double layer capacitor according to claim 1, is characterized in that, the mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.005 ~ 1:0.05.
3. electrolyte solution for electric double layer capacitor according to claim 2, is characterized in that, the mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.01 ~ 1:0.05.
4. electrolyte solution for electric double layer capacitor according to claim 3, is characterized in that, the mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.03 ~ 1:0.05.
5. electrolyte solution for electric double layer capacitor according to claim 4, is characterized in that, the mol ratio of described pyridines ionic liquid and alkyl trimethyl silane is 1:0.04.
6. according to the arbitrary described electrolyte solution for electric double layer capacitor of claim 1 to 5, it is characterized in that, described pyridines ionic liquid any one anion in pyridines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion and trifluoromethane sulfonic acid anion forms.
7. electrolyte solution for electric double layer capacitor according to claim 6, is characterized in that, described pyridines cation is propyl group pyridylium, butyl-pyridinium cation or pentyl pyridine cation.
8. according to the arbitrary described electrolyte solution for electric double layer capacitor of claim 1 to 5, it is characterized in that, described alkyl trimethyl silane is tridecyl trimethyl silane, dodecyl triethyl silicane, pentadecyl trimethyl silane or cetyl trimethyl silane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218411.9A CN103515118A (en) | 2012-06-28 | 2012-06-28 | Electrolyte for double-electric-layer capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218411.9A CN103515118A (en) | 2012-06-28 | 2012-06-28 | Electrolyte for double-electric-layer capacitor |
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| CN103515118A true CN103515118A (en) | 2014-01-15 |
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| CN201210218411.9A Pending CN103515118A (en) | 2012-06-28 | 2012-06-28 | Electrolyte for double-electric-layer capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761946A (en) * | 2014-12-19 | 2016-07-13 | 中国科学院福建物质结构研究所 | Super capacitor and manufacturing method thereof |
| CN107209146A (en) * | 2015-02-20 | 2017-09-26 | 德尔格安全股份两合公司 | Electrochemical gas sensor and the electrolyte for electrochemical gas sensor |
-
2012
- 2012-06-28 CN CN201210218411.9A patent/CN103515118A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761946A (en) * | 2014-12-19 | 2016-07-13 | 中国科学院福建物质结构研究所 | Super capacitor and manufacturing method thereof |
| CN107209146A (en) * | 2015-02-20 | 2017-09-26 | 德尔格安全股份两合公司 | Electrochemical gas sensor and the electrolyte for electrochemical gas sensor |
| US10732144B2 (en) | 2015-02-20 | 2020-08-04 | Dräger Safety AG & Co. KGaA | Electrochemical gas sensor and electrolyte for an electrochemical gas sensor |
| CN107209146B (en) * | 2015-02-20 | 2024-03-12 | 德尔格安全股份两合公司 | Electrochemical gas sensor and electrolyte for electrochemical gas sensor |
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Application publication date: 20140115 |