CN102426921A - Super capacitor and preparation method of electrolyte of capacitor - Google Patents
Super capacitor and preparation method of electrolyte of capacitor Download PDFInfo
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- CN102426921A CN102426921A CN2011104576897A CN201110457689A CN102426921A CN 102426921 A CN102426921 A CN 102426921A CN 2011104576897 A CN2011104576897 A CN 2011104576897A CN 201110457689 A CN201110457689 A CN 201110457689A CN 102426921 A CN102426921 A CN 102426921A
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- super capacitor
- ultracapacitor
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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 provides a super capacitor and a preparation method of an electrolyte of the capacitor and belongs to the technical field of chemical power sources. The super capacitor and method provided by the invention can be used for solving the problem that the internal resistance of the traditional organic system electrolyte is higher. At the same time, the super capacitor has higher energy density and power density and shows good cycle characteristic. The super capacitor comprises an anode, an electrolyte, a diaphragm, an electrolyte and a cathode. Graphene in different masses is added into the electrolyte to form a compound electrolyte. The preparation method of the compound electrolyte of the super capacitor comprises the following steps: 1. taking tetraethylammonium tetrafluoroborate, lithium tetrafluoroborate or lithium perchlorate as a solute and propylene carbonate or acetonitrile as a solvent to prepare a 0.5-1.5mol/L precursor solution; 2. adding the graphene into the precursor solution to prepare a 0.1-1mg/ml mixed solution; and 3. putting the mixed solution prepared in the step 2 into a vacuum drying oven and standing for 12-24 hours under the condition that the vacuum degree is 100-1000Pa, thus preparing the compound electrolyte of the super capacitor.
Description
Technical field
The invention belongs to technical field of chemical power, be specially the preparation method of a kind of ultracapacitor and electrolyte thereof.
Background technology
Ultracapacitor is compared with battery as a kind of green energy-storing device, has very high power density, characteristics such as the cycle-index of overlength.But himself lower energy density has limited its further application.
Its electrolyte of ultracapacitor commonly used at present is divided into two kinds, water system and organic system.Aqueous super capacitor is more higher than electric capacity at present, and internal resistance is lower, and cycle performance is better, but receives the restriction of the decomposition voltage of water own, causes its operating voltage lower, is generally about 1V.Organic system ultracapacitor operating voltage is higher, generally is higher than more than the 2.5V, but owing to itself adopt organic substance as the electrolyte solute, causes its internal resistance very high, has reduced it than electric capacity, and then has influenced its whole performance.
Graphene has the physicochemical characteristics of a lot of excellences as a kind of novel material with carbon element.Wherein the specific area of super large, splendid electric conductivity make it be hopeful very much to be applied to the green energy-storing field.
Summary of the invention
Technical problem to be solved by this invention is that present its electrolyte internal resistance of organic system ultracapacitor is higher, and specific capacity is lower.
The present invention solves the technical scheme of its technical problem:
A kind of ultracapacitor, this ultracapacitor comprises anode, electrolyte, barrier film, electrolyte, negative electrode, in electrolyte, mixes the Graphene of different quality, constitutes composite electrolyte.
A kind of preparation method of composite electrolyte of ultracapacitor, this preparation method may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, propene carbonate or acetonitrile are mixed with the precursor aqueous solution that concentration is 0.5～1.5mol/L as solvent with tetraethyl ammonium tetrafluoroborate, LiBF4 or lithium perchlorate;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 0.1～1mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 100～1000Pa leaves standstill 12～24h, processes the described composite electrolyte of ultracapacitor.
The present invention compares the beneficial effect that is had with prior art:
The solute of the electrolyte among the present invention adopts some quaternary ammonium salts or lithium salts class, like tetraethyl ammonium tetrafluoroborate (C
8H
20BF
4N), LiBF4 (LiBF
4), lithium perchlorate (LiClO
4); Solvent is an organic solvent, like propene carbonate (PC), and acetonitrile (AN), graphene-doped in above-mentioned solution then.The later electrolyte that mixes is compared internal resistance with traditional organic system electrolyte and is significantly reduced, and this organic system ultracapacitor has higher energy density and power density simultaneously, demonstrates good cycle characteristics.
Description of drawings
The SEM figure of the Graphene of Fig. 1 oxidation-reduction method preparation, resolution is 10 μ m.
The SEM figure of the Graphene of Fig. 2 oxidation-reduction method preparation, resolution is 2 μ m.
The organigram of Fig. 3 ultracapacitor.
Embodiment
A kind of ultracapacitor, this ultracapacitor comprises anode, electrolyte, barrier film, electrolyte, negative electrode.In electrolyte, mix the Graphene of different quality, constitute composite electrolyte.
One of combined electrolysis liquid and preparation method thereof may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, propene carbonate is a solvent with the tetraethyl ammonium tetrafluoroborate, is mixed with the precursor aqueous solution that concentration is 1mol/L;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 0.1mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 500Pa leaves standstill 24h, processes the described composite electrolyte of ultracapacitor.
Two of combined electrolysis liquid and preparation method thereof may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, the propene carbonate acetonitrile is mixed with the precursor aqueous solution that concentration is 0.5mol/L as solvent with LiBF4;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 0.5mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 100Pa leaves standstill 12h, processes the described composite electrolyte of ultracapacitor.
Three of combined electrolysis liquid and preparation method thereof may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, propene carbonate is mixed with the precursor aqueous solution that concentration is 1.5mol/L as solvent with lithium perchlorate;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 1mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 1000Pa leaves standstill 24h, processes the described composite electrolyte of ultracapacitor.
Four of combined electrolysis liquid and preparation method thereof may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, acetonitrile is mixed with the precursor aqueous solution that concentration is 1mol/L as solvent with the tetraethyl ammonium tetrafluoroborate;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 0.5mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 500Pa leaves standstill 24h, processes the described composite electrolyte of ultracapacitor.
The preparation method of graphene of mentioning among the present invention may further comprise the steps:
Step 1 5g crystalline flake graphite mixes stirring 0.5h with the 115ml concentrated sulfuric acid;
Under the step 2 condition of ice bath, in the reactant liquor of step 1, slowly add 15gKMnO
4, be warming up to 15 degrees centigrade, stir 0.5h; Continue to be warming up to 35 degrees centigrade of 2h;
Step 3 slowly drips the 200ml deionized water in the reactant liquor of step 2, add excessive H behind the 0.5h
2O
2Be glassy yellow to solution, filter and will filtrate and be washed till neutrality with 5%HCL and deionized water, freeze-drying is prepared into graphene oxide;
Step 4 under 500 degrees celsius, feeds H with the graphene oxide in the step 3
2Reduction becomes Graphene.
The construction method of the ultracapacitor of mentioning among the present invention may further comprise the steps:
Step 1 is with the active material of active carbon as electrode, and is even with 90: 5: 5 mixed with carbon black (conductive agent), polytetrafluoroethylene (adhesive), applies and is compressed on the nickel foam dry for standby under the vacuum condition;
Step 2 weighs different solutes and solvent prepares electrolyte;
Step 3 immerses 24h in the step 2 gained electrolyte with step 1 gained electrode slice.
Step 4 is barrier film with the polypropylene material, and the electrode slice of step 3 gained is combined into ultracapacitor in vacuum glove box.
Claims (2)
1. ultracapacitor, this ultracapacitor comprises anode, electrolyte, barrier film, electrolyte, negative electrode, it is characterized in that:
In electrolyte, mix the Graphene of different quality, constitute composite electrolyte.
2. the preparation method of the composite electrolyte of a ultracapacitor, it is characterized in that: this preparation method may further comprise the steps:
Step 1 preparation precursor aqueous solution
As solute, propene carbonate or acetonitrile are mixed with the precursor aqueous solution that concentration is 0.5～1.5mol/L as solvent with tetraethyl ammonium tetrafluoroborate, LiBF4 or lithium perchlorate;
Step 2 adds Graphene in precursor aqueous solution, be mixed with the mixed liquor that mass concentration is 0.1～1mg/ml;
The step 3 vacuum treatment
The mixed liquor of step 2 preparation is positioned in the vacuum drying chamber, and vacuum degree 100～1000Pa leaves standstill 12～24h, processes the described composite electrolyte of ultracapacitor.
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|---|---|---|---|
| CN2011104576897A CN102426921A (en) | 2011-12-30 | 2011-12-30 | Super capacitor and preparation method of electrolyte of capacitor |
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|---|---|---|---|
| CN2011104576897A CN102426921A (en) | 2011-12-30 | 2011-12-30 | Super capacitor and preparation method of electrolyte of capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956268A (en) * | 2014-05-15 | 2014-07-30 | 深圳新宙邦科技股份有限公司 | Electrolyte solute, electrolyte and high-voltage supercapacitor |
| CN109216034A (en) * | 2018-09-26 | 2019-01-15 | 南京科莱菲恩新材料科技有限公司 | Supercapacitor and preparation method thereof |
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| CN1823444A (en) * | 2003-07-14 | 2006-08-23 | 株式会社藤仓 | Electrolyte compositon, photoelectric converter and dye-sensitized solar cell using same |
| JP2007227087A (en) * | 2006-02-22 | 2007-09-06 | Toin Gakuen | Dye-sensitized photoelectric conversion element |
| CN101182384A (en) * | 2006-11-17 | 2008-05-21 | 三星Sdi株式会社 | Electrolyte composition for dye-sensitized solar cell, dye-sensitized solar cell including same, and method of preparing same |
| CN101933190A (en) * | 2008-02-06 | 2010-12-29 | 索尼公司 | Electrolyte and battery |
| CN102067257A (en) * | 2008-02-19 | 2011-05-18 | 索拉普琳特有限公司 | Electrolyte composition |
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2011
- 2011-12-30 CN CN2011104576897A patent/CN102426921A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1503778A (en) * | 2001-03-26 | 2004-06-09 | �����֯��ʽ���� | Ionic liquid electrolyte salt for storage device electrolytic solution for storage device electric double layer capacitor and secondary battery |
| CN1823444A (en) * | 2003-07-14 | 2006-08-23 | 株式会社藤仓 | Electrolyte compositon, photoelectric converter and dye-sensitized solar cell using same |
| JP2007227087A (en) * | 2006-02-22 | 2007-09-06 | Toin Gakuen | Dye-sensitized photoelectric conversion element |
| CN101182384A (en) * | 2006-11-17 | 2008-05-21 | 三星Sdi株式会社 | Electrolyte composition for dye-sensitized solar cell, dye-sensitized solar cell including same, and method of preparing same |
| CN101933190A (en) * | 2008-02-06 | 2010-12-29 | 索尼公司 | Electrolyte and battery |
| CN102067257A (en) * | 2008-02-19 | 2011-05-18 | 索拉普琳特有限公司 | Electrolyte composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956268A (en) * | 2014-05-15 | 2014-07-30 | 深圳新宙邦科技股份有限公司 | Electrolyte solute, electrolyte and high-voltage supercapacitor |
| CN109216034A (en) * | 2018-09-26 | 2019-01-15 | 南京科莱菲恩新材料科技有限公司 | Supercapacitor and preparation method thereof |
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Application publication date: 20120425 |