CN103887076A - Water system asymmetric super capacitor and preparation method thereof - Google Patents
Water system asymmetric super capacitor and preparation method thereof Download PDFInfo
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- CN103887076A CN103887076A CN201410027225.6A CN201410027225A CN103887076A CN 103887076 A CN103887076 A CN 103887076A CN 201410027225 A CN201410027225 A CN 201410027225A CN 103887076 A CN103887076 A CN 103887076A
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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
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- Y02E60/13—Energy storage using capacitors
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Abstract
The invention discloses a water system asymmetric super capacitor and a preparation method thereof. The capacitor comprises a positive electrode, a negative electrode and an electrolyte solution. The material of the positive electrode is graphene oxide/polypyrrole composite material. The material of the negative electrode is carbon material. The electrolyte solution is a water-soluble electrolyte solution. The preparation method comprises the following steps of (1) the preparation of graphene oxide/polypyrrole composite material, (2) the preparation of graphene oxide/polypyrrole composite material positive electrode, (3) the preparation of carbon material negative electrode, and (4) the assembly of water system asymmetric super capacitor with the water-soluble electrolyte solution as a basis. The working voltage range of the water system asymmetric super capacitor is 0.8V to 1.8V, the specific capacitance can reach 1.5 to 3 times of that of a water system carbon material symmetric super capacitor, the energy density can be increased by 4 to 10 times, and the power density can be increased by 2 to 6 times.
Description
Technical field
The invention belongs to technical field of chemical power, be specifically related to a kind of water system Asymmetric Supercapacitor and preparation method thereof.
Background technology
Ultracapacitor claims again capacitor with super capacity or electrochemical capacitor, is a kind of important electrochemical energy storage and conversion equipment.Ultracapacitor have power density high, can instantaneous large-current fast charging and discharging, have extended cycle life, serviceability temperature scope is wide, environmental friendliness, the feature such as with low cost, is real green energy resource.It has huge using value and market potential in various fields such as electric automobile, fuel combination automobile, exceptional load automobile, electric power, communication, national defence, consumption electronic products, by countries in the world institute extensive concern.But compared with traditional chemical cell, the energy density of ultracapacitor is lower, has limited its range of application.
Summary of the invention
The object of the invention is to overcome prior art defect, a kind of water system Asymmetric Supercapacitor is provided.
Another object of the present invention is to provide the preparation method of above-mentioned water system Asymmetric Supercapacitor.
Concrete technical scheme of the present invention is as follows:
A kind of water system Asymmetric Supercapacitor, comprises positive pole, negative pole and electrolyte solution, and the material of described positive pole is graphene oxide/Pt/Polypyrrole composite material, and described negative pole is material with carbon element, and described electrolyte solution is water-soluble electrolyte solution.
In a preferred embodiment of the invention, described material with carbon element is active carbon, carbon nano-fiber, carbon nano-tube or Graphene, and described water-soluble electrolyte solution is Na
2sO
4or K
2sO
4the aqueous solution.
In a preferred embodiment of the invention, the concentration of described water-soluble electrolyte solution is 0.5～10mol/L.
Another technical scheme of the present invention is as follows:
A preparation method for above-mentioned water system Asymmetric Supercapacitor, comprises the steps:
(1) prepare graphene oxide/Pt/Polypyrrole composite material;
(2) prepare graphene oxide/Pt/Polypyrrole composite material positive pole;
(3) prepare carbon material negative pole;
(4) dress up described water system Asymmetric Supercapacitor take described water-soluble electrolyte solution as base set.
In a preferred embodiment of the invention, described step (1) is specific as follows: ultrasonic graphite oxide being scattered in formed to graphene oxide solution in deionized water, then add pyrrole monomer, be made into the mixed solution of graphene oxide and pyrrole monomer, add again benzene methanesulfonic acid sodium and ammonium persulfate, at 0～5 ℃, react 12～36h; By reacted mixed solution vacuumizing filtration, then water flushing, vacuumize, the described graphene oxide/Pt/Polypyrrole composite material obtaining.
In a preferred embodiment of the invention, described step (2) is specific as follows: graphene oxide/Pt/Polypyrrole composite material, graphite, polytetrafluoroethylene that step (1) is made mix, add NMP ball milling 5～10h to make slurry, finally slurry is coated in nickel foam, vacuum drying, be pressed into thin slice, obtain graphene oxide/Pt/Polypyrrole composite material positive pole.
In a preferred embodiment of the invention, described step (3) is specific as follows: material with carbon element, graphite, polytetrafluoroethylene are mixed, add NMP ball milling 5～10h to make slurry, finally slurry is coated in nickel foam, vacuum drying, is pressed into thin slice, obtains carbon material negative pole.
In a preferred embodiment of the invention, described step (4) is specific as follows: carry out cutting to graphene oxide/Pt/Polypyrrole composite material is anodal with carbon material negative pole with the operating voltage of negative pole with than electric capacity according to positive pole, take porous polypropylene film as barrier film, take water-soluble electrolyte solution as basis, be assembled into water system Asymmetric Supercapacitor.
The invention has the beneficial effects as follows:
Water system Asymmetric Supercapacitor of the present invention, comprise positive pole, negative pole and electrolyte solution, the material of described positive pole is graphene oxide/Pt/Polypyrrole composite material, described negative pole is material with carbon element, described electrolyte solution is water-soluble electrolyte solution, and its operating voltage range is 0.8～1.8V, can reach 1.5～3 times of the symmetrical ultracapacitor of water system material with carbon element than electric capacity, energy density can improve 4～10 times, and power density can improve 2～6 times.
Embodiment
By embodiment, technical scheme of the present invention is further detailed and is described below.
Embodiment 1
(1) ultrasonic graphite oxide being scattered in formed to the graphene oxide solution that concentration is 4mg/mL in deionized water, then adding quality is the pyrrole monomer of 10 times of graphite oxides, be made into the mixed solution of graphene oxide and pyrrole monomer, adding benzene methanesulfonic acid sodium and ammonium persulfate to concentration is that 0.03mol/L(adjusts as required within the scope of 0.01～0.05mol/L again), at 0～5 ℃, react 24h(and within the scope of 12～36h, adjust as required); By reacted mixed solution vacuumizing filtration, then water rinse 3～5 times, at 100 ℃, (within the scope of 40～120 ℃, adjust as required) vacuumize, obtain described graphene oxide/Pt/Polypyrrole composite material.
(2) graphene oxide/Pt/Polypyrrole composite material, graphite, the polytetrafluoroethylene 85:10:5 mixing in mass ratio that step (1) are made, add 5ml/1g NMP ball milling 8h(within the scope of 5～10h, to adjust as required) make slurry, finally slurry is coated in nickel foam, vacuum drying at 100 ℃, be pressed into thin slice with 10MPa pressure, obtain graphene oxide/Pt/Polypyrrole composite material positive pole.
(3) by the 85:10:5 mixing in mass ratio of active carbon, graphite, polytetrafluoroethylene, add 5ml/1gNMP ball milling 8h(within the scope of 5～10h, to adjust as required) make slurry, finally slurry is coated in nickel foam, vacuum drying at 100 ℃, be pressed into thin slice with 10MPa pressure, obtain carbon material negative pole.
(4) carry out cutting to graphene oxide/Pt/Polypyrrole composite material is anodal with carbon material negative pole with the operating voltage of negative pole with than electric capacity according to positive pole, take porous polypropylene film as barrier film, with 6mol/L Na
2sO
4the aqueous solution is basis, is assembled into water system Asymmetric Supercapacitor.
Embodiment 2
Step (1) and (2) are with embodiment 1;
(3) by Graphene, graphite, polytetrafluoroethylene in mass ratio 85:10:5 mix, add 5ml/1gNMP ball milling 8h to make slurry, finally slurry is coated in nickel foam, vacuum drying at 100 ℃, is pressed into thin slice with 10MPa pressure, obtains carbon material negative pole.
(4) carry out cutting to graphene oxide/Pt/Polypyrrole composite material is anodal with carbon material negative pole with the operating voltage of negative pole with than electric capacity according to positive pole, take porous polypropylene film as barrier film, with 6mol/L K
2sO
4the aqueous solution is basis, is assembled into water system Asymmetric Supercapacitor.
In above-described embodiment, described material with carbon element can also be carbon nano-fiber or carbon nano-tube, and the concentration of described water-soluble electrolyte solution can also be for being 0.5～10mol/L.
The above, be only preferred embodiment of the present invention, therefore can not limit according to this scope of the invention process, the equivalence done according to the scope of the claims of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.
Claims (8)
1. a water system Asymmetric Supercapacitor, comprises positive pole, negative pole and electrolyte solution, it is characterized in that: the material of described positive pole is graphene oxide/Pt/Polypyrrole composite material, and described negative pole is material with carbon element, and described electrolyte solution is water-soluble electrolyte solution.
2. a kind of water system Asymmetric Supercapacitor as claimed in claim 1, is characterized in that: described material with carbon element is active carbon, carbon nano-fiber, carbon nano-tube or Graphene, described water-soluble electrolyte solution is Na
2sO
4or K
2sO
4the aqueous solution.
3. a kind of water system Asymmetric Supercapacitor as claimed in claim 2, is characterized in that: the concentration of described water-soluble electrolyte solution is 0.5～10mol/L.
4. a preparation method for the water system Asymmetric Supercapacitor described in arbitrary claim in claims 1 to 3, is characterized in that: comprise the steps:
(1) prepare graphene oxide/Pt/Polypyrrole composite material;
(2) prepare graphene oxide/Pt/Polypyrrole composite material positive pole;
(3) prepare carbon material negative pole;
(4) dress up described water system Asymmetric Supercapacitor take described water-soluble electrolyte solution as base set.
5. the preparation method of water system Asymmetric Supercapacitor as claimed in claim 4, it is characterized in that: described step (1) is specific as follows: ultrasonic graphite oxide being scattered in formed to graphene oxide solution in deionized water, then add pyrrole monomer, be made into the mixed solution of graphene oxide and pyrrole monomer, add again benzene methanesulfonic acid sodium and ammonium persulfate, at 0～5 ℃, react 12～36h; By reacted mixed solution vacuumizing filtration, then water flushing, vacuumize, the described graphene oxide/Pt/Polypyrrole composite material obtaining.
6. the preparation method of water system Asymmetric Supercapacitor as claimed in claim 4, it is characterized in that: described step (2) is specific as follows: graphene oxide/Pt/Polypyrrole composite material, graphite, polytetrafluoroethylene that step (1) is made mix, add NMP ball milling 5～10h to make slurry, finally slurry is coated in nickel foam, vacuum drying, be pressed into thin slice, obtain graphene oxide/Pt/Polypyrrole composite material positive pole.
7. the preparation method of water system Asymmetric Supercapacitor as claimed in claim 4, it is characterized in that: described step (3) is specific as follows: material with carbon element, graphite, polytetrafluoroethylene are mixed, add NMP ball milling 5～10h to make slurry, finally slurry is coated in nickel foam, vacuum drying, be pressed into thin slice, obtain carbon material negative pole.
8. the preparation method of water system Asymmetric Supercapacitor as claimed in claim 4, it is characterized in that: described step (4) is specific as follows: carry out cutting to graphene oxide/Pt/Polypyrrole composite material is anodal with carbon material negative pole with the operating voltage of negative pole with than electric capacity according to positive pole, take porous polypropylene film as barrier film, take water-soluble electrolyte solution as basis, be assembled into water system Asymmetric Supercapacitor.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104766723A (en) * | 2015-04-28 | 2015-07-08 | 中南大学 | Drainage asymmetric type supercapacitor made of MnCo2O4/Co2 (OH) 3C1 composite material and manufacturing method thereof |
| CN106206057A (en) * | 2016-08-04 | 2016-12-07 | 北京极豆科技有限公司 | A kind of Asymmetric Supercapacitor and preparation method thereof |
| CN107993851A (en) * | 2017-11-16 | 2018-05-04 | 南京师范大学 | A kind of graphene-based asymmetric super-capacitor and preparation method thereof |
| CN109686585A (en) * | 2018-12-21 | 2019-04-26 | 山东大学 | A kind of water system Asymmetric Supercapacitor and preparation method thereof based on NiCo-LDH/rGO and rGO |
| CN110323080A (en) * | 2019-07-04 | 2019-10-11 | 西北工业大学 | The preparation method of aqueous super capacitor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104766723A (en) * | 2015-04-28 | 2015-07-08 | 中南大学 | Drainage asymmetric type supercapacitor made of MnCo2O4/Co2 (OH) 3C1 composite material and manufacturing method thereof |
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| CN106206057B (en) * | 2016-08-04 | 2019-06-04 | 徐州汇腾热力工程技术服务有限公司 | A kind of Asymmetric Supercapacitor and preparation method thereof |
| CN107993851A (en) * | 2017-11-16 | 2018-05-04 | 南京师范大学 | A kind of graphene-based asymmetric super-capacitor and preparation method thereof |
| CN107993851B (en) * | 2017-11-16 | 2019-11-12 | 南京师范大学 | A kind of graphene-based asymmetric super-capacitor and preparation method thereof |
| CN109686585A (en) * | 2018-12-21 | 2019-04-26 | 山东大学 | A kind of water system Asymmetric Supercapacitor and preparation method thereof based on NiCo-LDH/rGO and rGO |
| CN110323080A (en) * | 2019-07-04 | 2019-10-11 | 西北工业大学 | The preparation method of aqueous super capacitor |
| CN110323080B (en) * | 2019-07-04 | 2021-07-16 | 西北工业大学 | Preparation method of water system super capacitor |
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Application publication date: 20140625 |