CN103839679A - Preparation method for graphene film current collector - Google Patents
Preparation method for graphene film current collector Download PDFInfo
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- CN103839679A CN103839679A CN201210491209.3A CN201210491209A CN103839679A CN 103839679 A CN103839679 A CN 103839679A CN 201210491209 A CN201210491209 A CN 201210491209A CN 103839679 A CN103839679 A CN 103839679A
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- graphene
- graphene film
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- film collector
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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 belongs to the field of graphene material preparation, and discloses a preparation method for a graphene film current collector. The method comprises the following steps that according to the mass ratio ranging from 1:1 to 5:1, graphene and ionic liquid are mixed together and grinded through an agate mortar, and sequentially go through ultrasonic treatment and mixing processing, and gelatinous graphene is acquired. The gelatinous graphene is put into a hot press machine and goes through hot press treatment, and the graphene film current collector is acquired. The invention provides the preparation method for the graphene film current collector, through the interaction of the ionic liquid and the graphene, the viscous and gelatinous graphene which is capable of dispersing evenly is formed, agglomeration of the graphene is avoided, a graphene film is formed through the way of the hot press, and the graphene film current collector is prepared through the action of a mechanical force. Compared with the traditional copper foil and aluminum foil, the graphene film current collector can reduce the weight of the current collector and energy density of a super capacitor is further improved.
Description
Technical field
The present invention relates to grapheme material preparation field, relate in particular to a kind of preparation method of graphene film collector.
Background technology
Ultracapacitor is a kind of novel energy storage device, there is the advantages such as high power density (for the more than 10 times of common batteries), high cycle life (cycle-index can reach more than 100,000 times), fast charging and discharging performance are good, be widely used in the AC-battery power source of military field, device for mobile communication, computer and electric automobile etc.Conventionally ultracapacitor mainly by electrode active material layer, electrolyte, assemble every film, collector, shell etc.The energy density of existing ultracapacitor is generally lower, the influencing factor of the energy density of ultracapacitor mainly contains the electric capacity of electrode material, the voltage of system, electrode material accounts for the proportion of the total weight of electrode active material layer, collector, sheathing material composition, therefore, the weight of the energy-storage property of increase electrode material and each composition material of reduction device can effectively improve the performance of device.Wherein, the quality of reduction collector is a method that effectively improves energy density.
Collector is a kind of structure or part that collects electric current, and major function is that the electric current that cell active materials is produced collects, and electron channel is provided, and accelerates electric charge and shifts, and improves and discharges and recharges a coulomb efficiency.Need to meet the features such as conductivity is high, good mechanical property, quality is light, internal resistance is little as collector.
At present, in most document or in industry, anodal aluminium foil, the negative pole of adopting of general collector adopts Copper Foil, because the density of metal collector is larger, quality is heavier, the weight of general collector accounts for the 20-25% of whole battery, and the proportion that electrode material accounts for whole battery greatly reduces, and finally causes the energy density of ultracapacitor lower.
Summary of the invention
Based on the problems referred to above, problem to be solved by this invention is to provide a kind of preparation method of graphene film collector.
Technical scheme of the present invention is as follows:
A preparation method for graphene film collector, comprises the steps:
According to the ratio of mass ratio 1: 1-5:1, by grinding with agate mortar after Graphene and ionic liquid mixing, successively through ultrasonic processing and stir process, obtain gel Graphene subsequently;
Described gel Graphene is put into hot press, and hot-pressing processing, obtains graphene film collector.
The preparation method of described graphene film collector, wherein, described ionic liquid is the two fluoroform sulfimide salt of 1-butyl-3-methylimidazole bis trifluoromethyl sulfimide salt, 1-butyl-3-methylimidazole hexafluorophosphate, 1-ethyl-3-methylimidazole fluoroform sulphonate or 1-ethyl-3-methylimidazole.
The preparation method of described graphene film collector, wherein, the time of described grinding is 5-20min.
The preparation method of described graphene film collector, wherein, the time of described ultrasonic processing is 1 ~ 5h.
The preparation method of described graphene film collector, wherein, the time of described stir process is 1 ~ 5h.
The preparation method of described graphene film collector, wherein, when described gel Graphene is carried out to hot-pressing processing, heating-up temperature is 200 ~ 400 ℃, exerts pressure as 10-50MPa.
The preparation method of described graphene film collector, wherein, the thickness of described graphene film collector is 5-20 μ m.
The preparation method of graphene film collector provided by the invention, by the interaction of ionic liquid and Graphene, formation can dispersedly obtain viscous gel shape Graphene, prevent the reunion of Graphene, then make graphene film by the mode of hot pressing, by the effect of mechanical force, prepare graphene film collector; This graphene film collector, compared with traditional Copper Foil, aluminium foil, can reduce the weight of collector greatly, and then improves the energy density of ultracapacitor.
Embodiment
Below preferred embodiment of the present invention is described in further detail.
Embodiment 1
(1) preparation of viscous gel shape Graphene:
Take Graphene 1g, 1-butyl-3-methylimidazole bis trifluoromethyl sulfimide salt 1g, grinds 5min with agate mortar after mixing, obtain mixture, put into beaker, carry out ultrasonic 1h, then under mechanical agitation, stir 5h, just can obtain viscous gel shape Graphene.
(2) preparation of graphene film collector: viscous gel shape Graphene is put into hot press, and the temperature of controlling hot pressing is 200 ℃, and pressure is 50MPa, and obtaining thickness is the graphene film collector of 5 μ m.
Embodiment 2
(1) preparation of viscous gel shape Graphene:
Take Graphene 2g, 1-butyl-3-methylimidazole hexafluorophosphate 6g, grinds 20min with agate mortar after mixing, obtains mixture, puts into beaker, carries out ultrasonic 2h, then under mechanical agitation, stirs 4h, just can obtain viscous gel shape Graphene.
(2) preparation of graphene film collector: viscous gel shape Graphene is put into hot press, and the temperature of controlling hot pressing is 300 ℃, and pressure is controlled at 30MPa, and obtaining thickness is the graphene film collector of 10 μ m.
Embodiment 3
(1) preparation of viscous gel shape Graphene:
Take expanded graphite 4g, 1-ethyl-3-methylimidazole fluoroform sulphonate 20g, grinds 5min with agate mortar after mixing, obtains mixture, puts into beaker, carries out ultrasonic 5h, then under mechanical agitation, stirs 1h, just can obtain viscous gel shape Graphene.
(2) preparation of graphene film collector: viscous gel shape Graphene is put into hot press, and the temperature of controlling hot pressing is 400 ℃, and pressure is controlled at 10MPa, and obtaining thickness is the graphene film collector of 20 μ m.
The hot strength test of graphene film collector, extension test carries out on dynamic mechanical analyzer (DMAQ800/TA).
Sample is the graphene film collector that embodiment 1 makes, and it is cut into 3*15mm
2rectangular sheet, carry out tension test test; Hot strength test result is: hot strength is 120MPa, and intensity is higher.
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 (7)
1. a preparation method for graphene film collector, is characterized in that, comprises the steps:
According to the ratio of mass ratio 1:1-5:1, by grinding with agate mortar after Graphene and ionic liquid mixing, successively through ultrasonic processing and stir process, obtain gel Graphene subsequently;
Described gel Graphene is put into hot press, and hot-pressing processing, obtains graphene film collector.
2. the preparation method of graphene film collector according to claim 1, it is characterized in that, described ionic liquid is the two fluoroform sulfimide salt of 1-butyl-3-methylimidazole bis trifluoromethyl sulfimide salt, 1-butyl-3-methylimidazole hexafluorophosphate, 1-ethyl-3-methylimidazole fluoroform sulphonate or 1-ethyl-3-methylimidazole.
3. the preparation method of graphene film collector according to claim 1, is characterized in that, the time of described grinding is 5-20min.
4. the preparation method of graphene film collector according to claim 1, is characterized in that, the time of described ultrasonic processing is 1 ~ 5h.
5. the preparation method of graphene film collector according to claim 1, is characterized in that, the time of described stir process is 1 ~ 5h.
6. the preparation method of graphene film collector according to claim 1, is characterized in that, when described gel Graphene is carried out to hot-pressing processing, heating-up temperature is 200 ~ 400 ℃, exerts pressure as 10-50MPa.
7. the preparation method of graphene film collector according to claim 1, is characterized in that, the thickness of described graphene film collector is 5-20 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210491209.3A CN103839679B (en) | 2012-11-27 | 2012-11-27 | A kind of preparation method of graphene film collector |
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| CN201210491209.3A CN103839679B (en) | 2012-11-27 | 2012-11-27 | A kind of preparation method of graphene film collector |
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| CN103839679B CN103839679B (en) | 2016-12-21 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142294A (en) * | 2010-01-29 | 2011-08-03 | 海洋王照明科技股份有限公司 | Graphene-ionic liquid composite material and preparation method thereof |
| WO2012117251A1 (en) * | 2011-03-01 | 2012-09-07 | University Of Ulster | Process for the preparation of graphene |
| CN102683035A (en) * | 2012-05-02 | 2012-09-19 | 清华大学 | Carbon nanometer electrode material for super capacitor and preparation method thereof |
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2012
- 2012-11-27 CN CN201210491209.3A patent/CN103839679B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142294A (en) * | 2010-01-29 | 2011-08-03 | 海洋王照明科技股份有限公司 | Graphene-ionic liquid composite material and preparation method thereof |
| WO2012117251A1 (en) * | 2011-03-01 | 2012-09-07 | University Of Ulster | Process for the preparation of graphene |
| CN102683035A (en) * | 2012-05-02 | 2012-09-19 | 清华大学 | Carbon nanometer electrode material for super capacitor and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| BONG GILL CHOI等: "High performance of a solid-state flexible asymmetric supercapacitor based on graphene films", 《NANOSCALE》, vol. 4, 28 May 2012 (2012-05-28) * |
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