CN103426654A - Electrolyte for double-layer capacitor and preparation method - Google Patents
Electrolyte for double-layer capacitor and preparation method Download PDFInfo
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- CN103426654A CN103426654A CN201210147548XA CN201210147548A CN103426654A CN 103426654 A CN103426654 A CN 103426654A CN 201210147548X A CN201210147548X A CN 201210147548XA CN 201210147548 A CN201210147548 A CN 201210147548A CN 103426654 A CN103426654 A CN 103426654A
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- piperidines
- layer capacitor
- ionic liquid
- electrolyte
- fatty acids
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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 discloses an electrolyte for a double-layer capacitor. The electrolyte for the double-layer capacitor contains piperidine ionic liquid and polyhydroxy alcohol fatty acid ester, wherein the mass ratio of the piperidine ionic liquid to the polyhydroxy alcohol fatty acid ester is 1:0.001 to 1:0.05. The invention further discloses a preparation method of the electrolyte for the double-layer capacitor. The injection time is short, and the equivalent internal resistance of the double-layer capacitor can be greatly reduced.
Description
Technical field
The present invention relates to a kind of electrolyte and preparation method thereof, relate in particular to electrolyte and preparation method thereof for a kind of double layer capacitor.
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 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 be comprised of ion fully under the condition of room temperature.As a kind of novel electrolyte, the appearance of ionic liquid, expanded the application of double electric layer capacitor greatly.The piperidines ionic liquid is because voltage window is wide, it is one of il electrolyte relatively had DEVELOPMENT PROSPECT, yet, the piperidines ionic liquid is because little with the compatibility of the diaphragm material commonly used such as PP, PE, makes that to make the equivalent internal resistance of double electric layer capacitor of electrolyte with pure piperidines ionic liquid bigger than normal.
Summary of the invention
Technical problem to be solved by this invention is to provide electrolyte and preparation method thereof for a kind of double layer capacitor, and its fluid injection time is short, can greatly reduce the internal resistance of double electric layer capacitor.
Solving the technical scheme that technical problem of the present invention adopts is: a kind of double layer capacitor electrolyte is provided, described double layer capacitor comprises piperidines ionic liquid and polyol esters of fatty acids with electrolyte, and the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.001 to 1: 0.05.
Preferably, the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.03 to 1: 0.05.
Preferably, described polyol esters of fatty acids be 11 fatty glycerides, ten triglycerides, 14 fatty glycerides, and 16 fatty glycerides in a kind of.
Preferably, described piperidines ionic liquid by piperidines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion, and the trifluoromethane sulfonic acid anion in any one anion form.
Preferably, described piperidines cation be Methylethyl piperidines cation, methyl-propyl piperidines cation, and methyl butyl piperidines cation in a kind of.
Solving another technical scheme that technical problem of the present invention adopts is: the preparation method of a kind of double layer capacitor with electrolyte is provided, and described preparation method comprises the steps:
Step 1, get piperidines ionic liquid and polyol esters of fatty acids that mass ratio is 1: 0.001 to 1: 0.05;
Step 2, in glove box, the piperidines ionic liquid in blend step one and polyol esters of fatty acids also stir 10 ~ 60 minutes, get final product to obtain described double layer capacitor electrolyte.
Preferably, in step 1, the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.03 to 1: 0.05.
Preferably, described polyol esters of fatty acids be 11 fatty glycerides, ten triglycerides, 14 fatty glycerides, and 16 fatty glycerides in a kind of.
Preferably, described piperidines ionic liquid by piperidines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion, and the trifluoromethane sulfonic acid anion in any one anion form.
Preferably, described piperidines cation be Methylethyl piperidines cation, methyl-propyl piperidines cation, and methyl butyl piperidines cation in a kind of.
With respect to prior art, the present invention has the following advantages: because the piperidines ionic liquid is large because of surface tension, little with the compatibility of the diaphragm materials such as PP, PE, make that to make the equivalent internal resistance of double electric layer capacitor of electrolyte with pure piperidines ionic liquid bigger than normal, add polyol esters of fatty acids in the piperidines ionic liquid after, because polyol esters of fatty acids is a kind of non-ionic surface active agent, it can increase the compatibility of piperidines ionic liquid and the capacitors such as PP, PE diaphragm material commonly used, thereby greatly reduces the equivalent internal resistance of double electric layer capacitor; And tension force of the present invention is little, in the fluid injection process, capillarity is few, can shorten the fluid injection time; Therefore, the fluid injection time of the present invention is short, and can greatly reduce the equivalent internal resistance of double electric layer capacitor.In addition, preparation method of the present invention is also very simple, easy operating.
The accompanying drawing explanation
Fig. 1 is the AC impedance curve of double layer capacitor of the present invention with the embodiment 1 of electrolyte.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
In the situation that in glove box (in anaerobic anhydrous and by inert gas shielding); the Methylethyl piperidines tetrafluoroborate that is 1: 0.04 by mass ratio and 11 fatty glycerides mix; stir after 60 minutes; 11 fatty glycerides are dispersed in Methylethyl piperidines tetrafluoroborate, obtain a kind of electrolyte solution for electric double layer capacitor.
The parameter of embodiment 2 to embodiment 20 is different from the parameter of embodiment 1, but preparation method's step and test condition are identical with embodiment 1, see the following form 1.
Table 1
Annotate: in table, 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 polyol esters of fatty acids reduces than the application recorded under equal conditions.
The test of equivalent internal resistance: take Graphene as electrode material, take each embodiment as electrolyte, be assembled into button cell diaphragm materials commonly used such as () diaphragm material are PP/PE, utilize the CHI660A electrochemical workstation to carry out ac impedance measurement to it.
The AC impedance curve of the capacitor that Fig. 1 makes for the electrolyte adopted 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 the AC impedance curve chart 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 equivalent internal resistance of the embodiment of the present invention 1 is that (curve a) for 92 Ω, and the equivalent internal resistance of pure ionic liquid is 117 Ω (curve b), the equivalent internal resistance of the embodiment of the present invention 1 is than the equivalent internal resistance of the pure ionic liquid Methylethyl piperidines tetrafluoro boric acid salt electrolyte recorded under equal conditions low 21.4%.
In a kind of electrolyte solution for electric double layer capacitor provided by the invention, because the piperidines ionic liquid is large because of surface tension, little with the compatibility of the diaphragm materials such as PP, PE, make that to make the equivalent internal resistance of double electric layer capacitor of electrolyte with pure piperidines ionic liquid bigger than normal, add polyol esters of fatty acids in the piperidines ionic liquid after, because polyol esters of fatty acids is a kind of non-ionic surface active agent, it can increase the compatibility of piperidines ionic liquid and the capacitors such as PP, PE diaphragm material commonly used, thereby greatly reduces the equivalent internal resistance of double electric layer capacitor; And tension force of the present invention is little, in the fluid injection process, capillarity is few, can shorten the fluid injection time; Therefore, the fluid injection time of the present invention is short, and can greatly reduce the equivalent internal resistance of double electric layer capacitor.In addition, preparation method of the present invention is also very simple, easy operating.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a double layer capacitor electrolyte, is characterized in that, described double layer capacitor comprises piperidines ionic liquid and polyol esters of fatty acids with electrolyte, and the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.001 to 1: 0.05.
2. double layer capacitor electrolyte according to claim 1, is characterized in that, the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.03 to 1: 0.05.
3. double layer capacitor electrolyte according to claim 1, is characterized in that, described polyol esters of fatty acids be 11 fatty glycerides, ten triglycerides, 14 fatty glycerides, and 16 fatty glycerides in a kind of.
4. double layer capacitor electrolyte according to claim 1, it is characterized in that, described piperidines ionic liquid by piperidines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion, and the trifluoromethane sulfonic acid anion in any one anion form.
5. double layer capacitor electrolyte according to claim 4, is characterized in that, described piperidines cation be Methylethyl piperidines cation, methyl-propyl piperidines cation, and methyl butyl piperidines cation in a kind of.
6. the preparation method of a double layer capacitor use electrolyte, is characterized in that, described preparation method comprises the steps:
Step 1, get piperidines ionic liquid and polyol esters of fatty acids that mass ratio is 1: 0.001 to 1: 0.05;
Step 2, in glove box, the piperidines ionic liquid in blend step one and polyol esters of fatty acids also stir 10 ~ 60 minutes, get final product to obtain described double layer capacitor electrolyte.
7. preparation method according to claim 6, is characterized in that, the mass ratio of described piperidines ionic liquid and polyol esters of fatty acids is 1: 0.03 to 1: 0.05.
8. preparation method according to claim 6, is characterized in that, described polyol esters of fatty acids be 11 fatty glycerides, ten triglycerides, 14 fatty glycerides, and 16 fatty glycerides in a kind of.
9. preparation method according to claim 6, it is characterized in that, described piperidines ionic liquid by piperidines cation and tetrafluoro boric acid anion, hexafluorophosphoric acid anion, two (trimethyl fluoride sulfonyl) imines anion, trifluoroacetic acid anion, and the trifluoromethane sulfonic acid anion in any one anion form.
10. preparation method according to claim 9, is characterized in that, described piperidines cation be Methylethyl piperidines cation, methyl-propyl piperidines cation, and methyl butyl piperidines cation in a kind of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210147548XA CN103426654A (en) | 2012-05-14 | 2012-05-14 | Electrolyte for double-layer capacitor and preparation method |
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| CN201210147548XA CN103426654A (en) | 2012-05-14 | 2012-05-14 | Electrolyte for double-layer capacitor and preparation method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004093110A1 (en) * | 2003-04-11 | 2004-10-28 | Bridgestone Corporation | Nonaqueous electrolyte and electric double-layer capacitor provided with it |
| CN102089924A (en) * | 2008-07-11 | 2011-06-08 | 法国原子能及替代能源委员会 | Ionic liquid electrolytes that include an anionic surfactant and electrochemical devices such as storage batteries comprising them |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004093110A1 (en) * | 2003-04-11 | 2004-10-28 | Bridgestone Corporation | Nonaqueous electrolyte and electric double-layer capacitor provided with it |
| JP2004349273A (en) * | 2003-04-11 | 2004-12-09 | Bridgestone Corp | Nonaqueous electrolyte and electric double layer capacitor provided with it |
| CN102089924A (en) * | 2008-07-11 | 2011-06-08 | 法国原子能及替代能源委员会 | Ionic liquid electrolytes that include an anionic surfactant and electrochemical devices such as storage batteries comprising them |
Non-Patent Citations (1)
| Title |
|---|
| 戴志飞: "《仿生膜材料与技术》", 30 April 2010, 科学出版社 * |
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Application publication date: 20131204 |