CN102142294A - Graphene-ionic liquid composite material and preparation method thereof - Google Patents
Graphene-ionic liquid composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a graphene-ionic liquid composite material and a preparation method thereof. The composite material comprises the following compositions in percentage by mass: 0.01-99.99% of graphene and 0.01-99.99% of ionic liquid, wherein the ionic liquid has a polar electron cloud structure, the graphene is in a graphene sheet structure, and the ionic liquid is doped in the graphene sheets through the polar electron cloud structure of the ionic liquid so a to form a graphene-ionic liquid composite structure. Because the polar electron cloud structure of the ionic liquid can damage the interaction force between the graphene sheets and reduce the gathering of the graphene, the obtained composite material has a high specific surface area and a large specific capacity, and can be suitable to be used as the electrode materials of batteries or capacitors, and the like.
Description
Technical field
The invention belongs to the inorganic-organic composite material technical field, be specifically related to Graphene-ionic liquid composite material of a kind of conductivity and preparation method thereof.
Background technology
Growing along with science and technology, people turn to inorganic-organic composite material from simple inorganic compounding material or organic composite material gradually, because of it has the dual performance of inorganic material and organic material concurrently, also have some unique composite construction simultaneously and enjoy favor.
For example, the strong K of the peace moral of Univ Manchester UK sea nurse (Andre K.Geim) etc. was prepared grapheme material in 2004.Because its particular structure and photoelectric property have been subjected to people and have paid attention to widely.Mono-layer graphite is owing to its big specific area, good electrical and thermal conductivity performance and low thermal coefficient of expansion are considered to desirable electrode material.But single grapheme material is as electrode material, be subjected to the restriction of all many-sides, as: assemble between the Graphene and caused the reduction of its specific area, thereby reduced its specific capacity and conductivity greatly, directly have influence on its performance as electrode material as electrode material.Therefore, a lot of researchs are devoted to mono-layer graphite is combined with other material, form composite material, to overcome above deficiency.
At present, grapheme material is most widely used to be as electrode material, for example as ultracapacitor.Yet, because its application on electrode material of above-mentioned drawbacks limit of single grapheme material.Polymer is owing to have advantages such as cheap and easy to get, light weight, processing and forming are good, becomes and one of compound research focus of grapheme material.For example, employing spinning techniques such as Graphene and polyethylene, polyamide or polyurethane are prepared polymer composite fibrous material.Yet, Graphene and polymer compound tense, because polymer is easy to reunite, thereby, composite material is difficult to utilize the bigger serface of single-layer graphene, the specific area of whole composite material does not obtain to improve, and the specific capacity of this complex fiber material is still lower simultaneously, and these factors directly influence its application as electrode materials such as ultracapacitors.
In addition, also have Graphene is obtained cation modified single-layer graphene film by electrochemical method, chemical reaction takes place in Graphene easily that prepare in this electrochemical process, causes the character of Graphene to change.And the dissolubility of grapheme material itself is relatively poor, can only be dissolved in the solvent of minority, and this is difficult to be compounded to form the composite material that mixes with other material with regard to having caused it.At present, the composite material of most of graphitiferous alkene all is the mixing of suspension He another material of Graphene.The shortcoming of this method has just caused the Graphene gathering, thereby has caused the reduction of the characteristic of grapheme material, for example, has reduced its performance as electrode material.
Summary of the invention
In view of this, provide Graphene-ionic liquid composite material that a kind of specific area is big, specific capacity is high, and Graphene-ionic liquid composite material preparation method that a kind of technology is simple, cost is low.
A kind of Graphene-ionic liquid composite material, it comprises according to the 0.01-99.99% Graphene of mass fraction meter and 0.01-99.99% ionic liquid, described ionic liquid has the electron cloud structure of polarity, described Graphene is the graphene film structure, described ionic liquid is doped between the graphite flake by its polarity electron cloud structure, forms Graphene-ion liquid composite construction.
And, a kind of Graphene-ionic liquid composite material preparation method, it comprises the steps:
Obtain the Graphene dispersion liquid: the Graphene raw material are provided, it is dissolved in the solvent, and carry out ultrasonic, heat treated, obtain the Graphene dispersion liquid;
Form the mixed system of Graphene, ionic liquid and solvent: in described Graphene dispersion liquid, add ionic liquid, the ionic liquid of sonic oscillation adding simultaneously, itself and Graphene are reacted, form the mixed system of Graphene, ionic liquid and solvent, wherein said ionic liquid has polarity electron cloud structure, and described Graphene is the graphene film structure.
The rotary evaporation solvent: rotary evaporation is removed most of solvent;
Filter: the mixed system after will evaporating filters, and obtains Graphene-ion liquid composite material, and wherein the composite material that is obtained comprises 0.01-99.99% Graphene and the 0.01-99.99% ionic liquid according to the mass fraction meter.
In described Graphene-ionic liquid composite material, described Graphene is the graphene film structure, has pi-pi bond between the graphene film, thereby can allow ionic liquid be entrained between the graphene film by its polarity electron cloud structure, forms composite construction.Wherein, ion liquid polarity electron cloud structure can be destroyed the interaction force of graphite between layer by layer, reduces the gathering of Graphene, thereby has improved the specific area of composite material, when its during as electrode material, have higher specific capacity.In Graphene-ionic liquid composite material preparation method, in the presence of solvent,, promptly obtain this composite material by this single step reaction by Graphene dispersion liquid and ionic liquid are reacted down ultrasonic, make that this preparation technology is simple and reliable, effectively reduce the technology cost.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is preparation method's flow chart of the Graphene-ionic liquid composite material of the embodiment of the invention;
Fig. 2 is the stereoscan photograph of the mono-layer graphite that obtains among the preparation method of Graphene-ionic liquid composite material of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Graphene-the ionic liquid composite material of the embodiment of the invention comprises according to the 0.01-99.99% Graphene of mass fraction meter and 0.01-99.99% ionic liquid, described ionic liquid has the electron cloud structure of polarity, described Graphene is the graphene film structure, described ionic liquid is doped between the graphite flake by its polarity electron cloud structure, forms Graphene-ion liquid composite construction.
Graphene shared mass fraction in composite material is preferably 10-80%, and in a specific embodiment, the mass fraction of Graphene is about 30%.During the too high levels of Graphene in composite material, for example be higher than 80%, this moment, ionic liquid content was less relatively, was not enough to fully disperse Graphene, had a spot of Graphene and produced and assemble; Cross when hanging down, for example be lower than 10%, Graphene content is less relatively, and it is difficult to be shaped, poor stability.When the content of Graphene and polyaniline is comparatively moderate, be easy to better compoundly each other, have good electrode material performance.This Graphene is to exist with the single-layer graphene form of disperseing, and does not take place significantly to assemble or agglomeration, and combines with ionic liquid or be combined into composite construction with the mono-layer graphite form.Because both electron clouds interact, and ion liquid polarity electron cloud structure can be destroyed the interaction force of graphite between layer by layer, reduce the gathering of Graphene, thereby ionic liquid can be present between graphene layer and the layer, interact with electron cloud and the pi-pi bond between the graphene film, ionic liquid is doped between the graphene film by ionic liquid polarity.In preferred embodiment of the present invention, Graphene comes off by native graphite, is high-quality graphene film, has higher conductivity and specific area.Like this, in composite material, Graphene still can keep the bigger serface that mono-layer graphite has, good conduction, heat conductivility and low thermal coefficient of expansion, and is embodied in the whole composite material, has eliminated the deficiency that Graphene is easily assembled.
Ionic liquid shared mass fraction in composite material is preferably 40-70%, is more preferred from 50-60%, and in a specific embodiment, ion liquid mass fraction is about 50-55%.Ionic liquid has the electron cloud structure, have strong polarity, show very strong polarization, can reduce the interaction force between graphene film π-π, make the π-π interaction force between the graphene layer of graphite surface reduce, can reduce the gathering of Graphene.Particularly, single-layer graphene in the composite construction and ionic liquid are that the effect by ion liquid polarity electron cloud is combined as a whole, and make composite material present mud shape or pasty state structure.
Ionic liquid can comprise the imidazole radicals tetrafluoroborate, the imidazole radicals hexafluorophosphate, the inferior amidic-salt of imidazole radicals two trifluoromethane sulfonic acids, the pyrrole radicals borofluoride, the pyrrole radicals hexafluorophosphate, the inferior amidic-salt of pyrrole radicals two trifluoromethane sulfonic acids, methoxy ethyl group tetrafluoroborate, the inferior amidic-salt of methoxy ethyl group two trifluoromethane sulfonic acids, imidazole radicals hexafluoro tantalates, imidazole radicals tetrafluoro niobates, imidazole radicals three fluoro sulfonates, imidazole radicals two (fluoroform sulfone) acid imide, at least a in two fluoroform sulfimide lithiums.Particularly, ionic liquid can comprise 1-ethyl-3-methyl imidazolium tetrafluoroborate (EMI-BF
4), 1-butyl-3-methyl imidazolium tetrafluoroborate (BMI-BF
4), 1-butyl-3-methylimidazole hexafluorophosphate (BMI-PF
6), the inferior amidic-salt (BMI-TFSI) of 1-butyl-3-methylimidazole two trifluoromethane sulfonic acids, 1-methyl-propyl pyrrole tetrafluoroborate (MPPy-BF
4), 1-methyl-propyl pyrrole hexafluorophosphate (MPPy-PF
6), the inferior amidic-salt (MPPy-TFSI) of 1-methyl-propyl pyrrole two trifluoromethane sulfonic acids, N, the tetrafluoroborate (DEME-BF of N-diethyl-N-methyl-N-methoxy ethyl group
4), N, the inferior amidic-salt (DEME-TFSI) of N-diethyl-N-methyl-N-methoxy ethyl group two trifluoromethane sulfonic acids, 1-ethyl-3-methylimidazole hexafluoro tantalates (EMITaF
6), 1-ethyl-3-methylimidazole tetrafluoro niobates (EMINbF
6), 1-ethyl-3-methylimidazole three fluoro sulfonate EMICF3SO3,1-ethyl-3-methylimidazole two (fluoroform sulfone) acid imide EMI (CF
3SO
2)
2At least a in N, the two fluoroform sulfimide lithiums (LiTFSI).
In addition, when composite material is used as the electrode material of battery and electric capacity, ionic liquid has not only effectively increased the Graphene specific surface to greatest extent, increase the specific capacity of battery and electric capacity, and ionic liquid also can be used as electrolyte and use, so just exempted the priming by vacuum electrolyte, avoided the bubble that produces in the electrolytical technical process in perfusion, reduce the existence of gas in the electrode, the battery preparation technique of Jian Huaing greatly, the capacity and the life-span of raising battery and electric capacity.
See also table 1, show the Graphene-ionic liquid composite material of present embodiment and the performance of Graphene.As shown in Table 1, the conductivity of the composite material of present embodiment is about 10
3The S/m order of magnitude, suitable with pure Graphene, meet requirement fully as electrode material.The specific area of composite material is significantly greater than the specific area of independent Graphene.When battery was made, the composite material of present embodiment was gone up substantially and do not had bubble, and is significantly excellent in independent Graphene, as previously mentioned.And the specific capacity of composite material is apparently higher than independent Graphene, this is corresponding with specific area, thus, illustrate that the composite material of present embodiment not only has both advantages concurrently, also have higher specific area, specific capacity and higher conductivity, applicable to the electrode material of battery or electric capacity etc.
Graphene-the ionic liquid composite material of table 1 present embodiment and Graphene and ion liquid performance
| Performance parameter | The present embodiment composite material | Graphene (or graphene oxide) |
| Conductance | About 10 3The S/m order of magnitude | About 10 3The S/m order of magnitude |
| Specific area | 900m 2/g | 600m 2/g |
| Swelling, the problem of giving vent to anger | Do not produce bubble | Be easy to generate bubble |
| Specific capacity | About 100 | About 60 |
See also Fig. 1, show preparation method's flow process of the Graphene-ionic liquid composite material of the embodiment of the invention, this method comprises the steps:
S01 obtains the Graphene dispersion liquid: the Graphene raw material are provided, it is dissolved in the solvent, and carry out ultrasonic, heat treated, obtain the Graphene dispersion liquid;
S02, form the mixed system of Graphene, ionic liquid and solvent: in described Graphene dispersion liquid, add ionic liquid, while sonic oscillation ionic liquid, itself and Graphene are reacted, form the mixed system of Graphene, ionic liquid and solvent, wherein said ionic liquid has polarity electron cloud structure, and described Graphene is the graphene film structure;
S03, the rotary evaporation solvent: rotary evaporation is removed most of solvent;
S04, filter: the mixed system after will evaporating filters, and obtains Graphene-ion liquid composite material, and wherein the composite material that is obtained comprises 0.01-99.99% Graphene and the 0.01-99.99% ionic liquid according to the mass fraction meter.
Particularly, in step S01, the Graphene raw material are native graphite, and by dissolution with solvents and sonicated, this native graphite comes off and obtains the Graphene solution that exists with the single-layer graphene form of disperseing.Wherein, solvent comprise aromatic hydrocarbons, the perfluor of perfluor arene derivatives, contain pyridine compounds, contain at least a in the phenyl compound.Particularly, solvent can comprise that hexafluoro benzene, octafluoro toluene, five fluoridizes benzene acetonitrile, five and fluoridize at least a in pyridine, nitropyridine, phenylamino, the nitroanilines.
Usually, the method for preparing Graphene comprises following several: mechanical stripping method, reduction-oxidation graphite method, vapour deposition process, electrochemical process.Wherein, the method for mechanical stripping can only the trace production, be unwell to industrialization, only be used for the laboratory.Reduction-oxidation graphite method adopts the method for chemical reaction, causes environmental pollution easily, and the grapheme material defective that forms is many, contains a spot of oxygen and other elements, and the application scenario is limited.Vapour deposition process also is to be not suitable for industrial production, and the cost height.Chemical reaction takes place in the Graphene of electrochemical process preparation easily, causes the character of Graphene to change, and is of low quality.And present embodiment comes off by native graphite, the graphene film quality height of acquisition.Use dissolution with solvents simultaneously, for example the arene derivatives of the aromatic hydrocarbons of above-mentioned perfluor, perfluor, contain pyridine compounds, contain phenyl compound etc., itself also has the electron cloud characteristic these compounds, and mono-layer graphite is had certain dissolubility, the highlyest can reach 1mg/mL.Thereby, in conjunction with the acting in conjunction of sonic oscillation and dissolution with solvents, can obtain disperseing Graphene dispersion liquid preferably.In this dispersion liquid, Graphene can exist with the single-layer graphene form of disperseing.
In step S02, ionic liquid can adopt above-mentioned various ionic liquids, does not repeat them here.Wherein, preferably, ionic liquid is dropwise to be incorporated in the Graphene dispersion liquid on sonic oscillation limit, limit, and the time of reaction can be 12 hours to 160 hours, mainly is ionic liquid is attached between the Graphene lamella well.In this process, ionic liquid is incorporated between the Graphene lamella by its polarity electron cloud effect, utilize its strong polarity, reduce the interaction force between graphene film π-π, make Graphene π-π interaction force between layer by layer of graphite surface reduce, and solvent can accumulate in the Graphene surface, make that Graphene is easier to be dispersed in the liquid-phase system, the Graphene of graphite surface is come off, form the mixed system of Graphene, ionic liquid and solvent, in this mixed system, ionic liquid and solvent can be to be present between the Graphene lamella.In addition, when adding ionic liquid, the ionic liquid mass ratio of described solvent of may command and adding is 0.01-99.99%.
In step S03, because ionic liquid has low-down vapour pressure, solvent is more volatile, can directly remove most of solvent by rotary evaporation, has a spot of solvent can remain between the Graphene lamella, and ionic liquid still is retained between the Graphene lamella simultaneously.The solvent that evaporates can be recycled, and is used for dissolving native graphite in next preparation process again.Like this, solvent just can be reused, and environmental protection further effectively reduces the technology cost.
In step S04,, can finally obtain the Graphene-ionic liquid composite material of mud shape or pasty state by removing by filter the ionic liquid that is positioned at the surface in a large number because the more ion liquid size of size of graphene film is much bigger.In addition, should be understood that, can be by the addition of confession raw-material addition of Graphene and step S02 intermediate ion liquid among the step S01 be regulated and control, control the degree of removing of this step intermediate ion liquid simultaneously, for example regulate to remove the ion liquid time greatly in 6-72 hour scope, make that to reach Graphene and ion liquid mass fraction scope obtain actual required proportion between 0.01-99.99% in the described composite material.
Illustrate aspects such as the preparation method of above-mentioned Graphene-ionic liquid composite material and performance below by a plurality of embodiment.
Embodiment 1:
The preparation method of the Graphene-ionic liquid composite material of present embodiment 1 specifically may further comprise the steps:
(1) obtain the Graphene dispersion liquid: fluoridize in the benzene acetonitrile solvent at 100mL five, add the native graphite of 10mg, ultrasonic, heating obtains the Graphene dispersion liquid.
For detecting the existence of step (1) reaction back Graphene, the Graphene that desirable reaction obtains is made scanning electron microscopic observation.See also Fig. 2, shown the stereoscan photograph of the Graphene that step (1) obtains, as can be seen from the figure, Graphene has formed the flaky material of gauffer shape, and the formation of Graphene sheet material is described.
(2) mixed system of formation Graphene, ionic liquid and solvent: in above-mentioned dispersion liquid, the 1-ethyl-3-methyl imidazolium tetrafluoroborate ionic liquid that progressively adds 10mL is as cosolvent, and ultrasonic limit, limit drips ionic liquid, mixed system reaction 24 hours.
(3) rotary evaporation goes out to desolvate: because 1-ethyl-3-methyl imidazolium tetrafluoroborate ionic liquid has low-down vapour pressure, rotary evaporation is directly removed five and is fluoridized the benzene acetonitrile solvent, remaining a spot of solvent, and ionic liquid still is present between the Graphene lamella.
(4) filter: because the more ion liquid size of size of graphene film is much bigger, can remove a large amount of ionic liquids, this moment, filtration time was roughly 36 hours, finally obtain the Graphene-ion liquid composite material of mud shape or pasty state, according to the degree that ionic liquid is removed, the mass fraction scope that this moment, Graphene accounted for is approximately 10-90%.
Embodiment 2:
The preparation method of the Graphene-ionic liquid composite material of present embodiment 2 is substantially the same manner as Example 1, difference is the solvent in the step (1) is replaced to nitropyridine and phenylamino mixed solution, in addition, the native graphite quality that adds is 1mg, other step is basic identical in embodiment 1, finally obtain the Graphene-ion liquid composite material of mud shape or pasty state, the 2 intermediate ion liquid times of removing of present embodiment are 12 hours, and the mass fraction scope that this moment, Graphene accounted for is approximately 0.10-20%.
Embodiment 3:
The preparation method of the Graphene-ionic liquid composite material of present embodiment 3 is substantially the same manner as Example 1, difference is the ionic liquid in the step (2) is replaced with the inferior amidic-salt of 1-methyl-propyl pyrrole two trifluoromethane sulfonic acids and 1-ethyl-3-methylimidazole hexafluoro tantalates, in addition, the native graphite quality that adds is 2mg, adding ion liquid amount is 1-ethyl-3-methyl imidazolium tetrafluoroborate of 5mL, other step is basic identical in embodiment 1, finally obtain the Graphene-ion liquid composite material of mud shape or pasty state, the time that ionic liquid is removed is 24 hours, and the mass fraction scope that this moment, Graphene accounted for is approximately 30-80%.
In described Graphene-ionic liquid composite material, described Graphene and ionic liquid form composite construction by the interaction of both electron cloud structures, and ion liquid polarity electron cloud structure can be destroyed the interaction force between the Graphene lamella, reduce the gathering of Graphene, thereby improved the specific area of composite material, when it is used as electrode material, has higher specific capacity.In Graphene-ionic liquid composite material preparation method, in the presence of solvent,, promptly obtain this composite material by this single step reaction by Graphene dispersion liquid and ionic liquid are reacted down ultrasonic, make that this preparation technology is simple and reliable, effectively reduce the technology cost.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. Graphene-ionic liquid composite material, it comprises according to the 0.01-99.99% Graphene of mass fraction meter and 0.01-99.99% ionic liquid, described ionic liquid has the electron cloud structure of polarity, described Graphene is a Graphene sheet structure, described ionic liquid is doped between the described graphene film by its polarity electron cloud structure, forms Graphene-ion liquid composite construction.
2. Graphene-ionic liquid composite material as claimed in claim 1, it is characterized in that described ionic liquid comprises the imidazole radicals tetrafluoroborate, the imidazole radicals hexafluorophosphate, the inferior amidic-salt of imidazole radicals two trifluoromethane sulfonic acids, the pyrrole radicals borofluoride, the pyrrole radicals hexafluorophosphate, the inferior amidic-salt of pyrrole radicals two trifluoromethane sulfonic acids, methoxy ethyl group tetrafluoroborate, the inferior amidic-salt of methoxy ethyl group two trifluoromethane sulfonic acids, imidazole radicals hexafluoro tantalates, imidazole radicals tetrafluoro niobates, imidazole radicals three fluoro sulfonates, at least a in imidazole radicals two (fluoroform sulfone) acid imide or the two fluoroform sulfimide lithium.
3. Graphene-ionic liquid composite material as claimed in claim 1, it is characterized in that, described ionic liquid comprises 1-ethyl-3-methyl imidazolium tetrafluoroborate, 1-butyl-3-methyl imidazolium tetrafluoroborate, 1-butyl-3-methylimidazole hexafluorophosphate, the inferior amidic-salt of 1-butyl-3-methylimidazole two trifluoromethane sulfonic acids, 1-methyl-propyl pyrrole tetrafluoroborate, 1-methyl-propyl pyrrole hexafluorophosphate, the inferior amidic-salt of 1-methyl-propyl pyrrole two trifluoromethane sulfonic acids, N, the tetrafluoroborate of N-diethyl-N-methyl-N-methoxy ethyl group, N, the inferior amidic-salt of N-diethyl-N-methyl-N-methoxy ethyl group two trifluoromethane sulfonic acids, 1-ethyl-3-methylimidazole hexafluoro tantalates, 1-ethyl-3-methylimidazole tetrafluoro niobates, 1-ethyl-3-methylimidazole three fluoro sulfonates, at least a in 1-ethyl-3-methylimidazole two (fluoroform sulfone) acid imide or the two fluoroform sulfimide lithium.
4. Graphene-ionic liquid composite material as claimed in claim 1 is characterized in that, the Graphene in the described composite construction is compound with the single-layer graphene form and the ionic liquid that disperse, and described ionic liquid is present between graphene film and the sheet.
5. Graphene-ionic liquid composite material as claimed in claim 4 is characterized in that single-layer graphene in the described composite construction and ionic liquid are combined as a whole by the effect of ion liquid polarity electron cloud, and described composite material is mud shape or pasty state.
6. Graphene-ionic liquid composite material preparation method, it comprises the steps:
Obtain the Graphene dispersion liquid: the Graphene raw material are provided, it is dissolved in the solvent, and carry out ultrasonic, heat treated, obtain the Graphene dispersion liquid;
Form the mixed system of Graphene, ionic liquid and solvent: in described Graphene dispersion liquid, add ionic liquid, while sonic oscillation ionic liquid, itself and Graphene are reacted, form the mixed system of Graphene, ionic liquid and solvent, wherein said ionic liquid has the electron cloud structure of polarity, and described Graphene is the graphene film structure;
The rotary evaporation solvent: rotary evaporation is removed most of solvent;
Filter: the mixed system after will evaporating filters, and obtains Graphene-ion liquid composite material, and wherein the composite material that is obtained comprises 0.01-99.99% Graphene and the 0.01-99.99% ionic liquid according to the mass fraction meter.
7. Graphene as claimed in claim 6-ionic liquid composite material preparation method, it is characterized in that, described Graphene raw material are native graphite, and by dissolution with solvents and sonicated, described native graphite comes off and obtains the Graphene solution that exists with the single-layer graphene form of disperseing.
8. Graphene as claimed in claim 6-ionic liquid composite material preparation method, it is characterized in that described ionic liquid comprises the imidazole radicals tetrafluoroborate, the imidazole radicals hexafluorophosphate, the inferior amidic-salt of imidazole radicals two trifluoromethane sulfonic acids, the pyrrole radicals borofluoride, the pyrrole radicals hexafluorophosphate, the inferior amidic-salt of pyrrole radicals two trifluoromethane sulfonic acids, methoxy ethyl group tetrafluoroborate, the inferior amidic-salt of methoxy ethyl group two trifluoromethane sulfonic acids, imidazole radicals hexafluoro tantalates, imidazole radicals tetrafluoro niobates, imidazole radicals three fluoro sulfonates, imidazole radicals two (fluoroform sulfone) acid imide, at least a in two fluoroform sulfimide lithiums.
9. Graphene as claimed in claim 6-ionic liquid composite material preparation method is characterized in that, described solvent comprise aromatic hydrocarbons, the perfluor of perfluor arene derivatives, contain pyridine compounds, contain at least a in the phenyl compound.
10. Graphene as claimed in claim 6-ionic liquid composite material preparation method, it is characterized in that described solvent comprises that hexafluoro benzene, octafluoro toluene, five fluoridizes benzene acetonitrile, five and fluoridize at least a in pyridine, nitropyridine, phenylamino, the nitroanilines.
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