CN103839693A - Preparation method of graphene composite electrode - Google Patents
Preparation method of graphene composite electrode Download PDFInfo
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- CN103839693A CN103839693A CN201210490449.1A CN201210490449A CN103839693A CN 103839693 A CN103839693 A CN 103839693A CN 201210490449 A CN201210490449 A CN 201210490449A CN 103839693 A CN103839693 A CN 103839693A
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Abstract
The invention provides a preparation method of a graphene composite electrode. The preparation method of the graphene composite electrode comprises the steps that graphite oxide is prepared, the graphite oxide, organic ionic liquid and a reducing agent are mixed and are placed in an ultrasonic instrument to obtain the graphene in an exfoliation mode, a mixture of the graphene and the organic ionic liquid is obtained, then the mixture is placed in a mould, and the graphene composite electrode is obtained through the steps of pressure application and cooling. The preparation method of the graphene composite electrode optimizes the manufacturing process of an electrochemical power source, lowers manufacturing cost, is wide in source of raw materials, and achieves industrialization easily. The graphene composite electrode prepared through the method improves the proportion of active materials and energy density.
Description
Technical field
The invention belongs to electrochemical power source technical field, specifically relate to a kind of preparation method of graphene combination electrode.
Background technology
Graphene is a kind of Two-dimensional Carbon atomic crystal of the discoveries such as the strong K sea nurse of the peace moral of Univ Manchester UK in 2004 (Andre K.Geim), and obtains the physics Nobel Prize in 2010, again causes material with carbon element research boom.Because its unique structure and photoelectric property become the study hotspot in the fields such as material with carbon element, nanometer technology, Condensed Matter Physics and functional material, many scientific workers are attracted.Graphene has good conduction, heat conductivility and low thermal coefficient of expansion, and its theoretical specific area is up to 2630m
2/ g, can be used for effect transistor, electrode material, composite material, liquid crystal display material, sensor.In the preparation method of Graphene, have graphite oxide reducing process at present, this method output is high, and cost is low; Also have by pyrolysis carbon source and prepare Graphene, this method yields poorly, cost is higher.
In addition, ultracapacitor has good recycling and power density that the life-span is high, therefore has wide practical use.When Graphene is for electrode material for super capacitor at present, need to add binding agent, this can cause the proportion of active material to decline, and affects the performance of capacity, also can increase internal resistance, affects the performance of power density.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art, the preparation method of the graphene combination electrode that a kind of internal resistance is little, active material proportion is high is provided.
In order to realize foregoing invention object, technical scheme of the present invention is as follows:
A preparation method for graphene combination electrode, comprises the steps:
Be 1g:5～1000ml by mass volume ratio, graphite oxide joined in the organic ion liquid of melting and mix, obtain the mixed solution of melting; In mixed solution, add reducing agent subsequently, and carry out ultrasonic and centrifugal treating, obtain the mixture of Graphene and organic ion liquid;
Described mixture is carried out to mold pressing processing, obtain described graphene combination electrode presoma after cooling;
At described graphene combination electrode presoma surface metallization film, obtain described graphene combination electrode.
The preparation method of above-mentioned graphene combination electrode, mixes above-mentioned graphite oxide with the organic ion liquid of melting, add reducing agent, peels off reduction generation Graphene, and be mixed with mixture through ultrasonic, then carries out mold pressing and sprays collector.Organic ion liquid mixes with Graphene, and both close contacts are more conducive to electrical conductivity, adopt thermal spraying to prepare collector, reduce the contact resistance of electrode material and collective, therefore, the graphene combination electrode of preparation can effectively improve the power density of chemical power source.In addition, the method reduced size mixing, the technology for preparing electrode such as batch mixing, coating, further optimize chemical power source manufacturing process, reduce manufacturing cost, and raw material sources are wide, are easy to realize industrialization.
Brief description of the drawings
Fig. 1 is preparation method's process flow diagram of embodiment of the present invention graphene combination electrode.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, 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.
The embodiment of the present invention provides the technique of above-mentioned graphene combination electrode simple preparation method.The method technological process as shown in Figure 1, comprises the steps:
S01: obtain graphite oxide;
S02: the mixture of preparing graphene-containing and organic ion liquid: be that graphite oxide that 1g:5～1000ml obtains step S01 joins in the organic ion liquid of melting and mixes by mass volume ratio, obtain the mixed solution of melting; In mixed solution, add reducing agent subsequently, and carry out ultrasonic and centrifugal treating, obtain the mixture of Graphene and organic ion liquid;
S03: prepare graphene composite material layer: mixture prepared by step S02 carries out mold pressing processing, obtains described graphene combination electrode presoma after cooling;
S04: spray metal film: the graphene combination electrode presoma surface metallization film of preparing at step S03, obtains described graphene combination electrode;
Concrete, in above-mentioned steps S01, graphite oxide is preferably prepared as follows and obtains:
Step 1): according to the mass volume ratio of 50g:1.15L, graphite powder is added in the concentrated sulfuric acid of 0 DEG C, then adds potassium permanganate, the quality of potassium permanganate is graphite 3 times, and remain on below 10 DEG C, stir 2h, obtain mixed solution;
Step 2): the mixed solution of step 1) preparation is stirred after 24h in room-temperature water bath, under condition of ice bath, slowly add deionized water, add again the deionized water that contains hydrogen peroxide, carry out afterwards suction filtration, screening again with the hydrochloric acid that concentration is 10% wash, suction filtration, until filtrate is neutral, obtain graphite oxide.
In one embodiment, this graphite oxide preparation method step:
50g, 500 order graphite powders are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
In the preparation method of above-mentioned graphite oxide, graphite powder can be natural flake graphite, Delanium etc.In addition, consider the size of Graphene in order to improve speed prepared by graphite oxide, the particle diameter of graphite powder is preferably 500 orders left and right and is advisable simultaneously.Certainly, this graphite oxide also can be bought acquisition in market.
In above-mentioned steps S02, the mass volume ratio of graphite oxide and organic ion liquid is 1g:5～1000ml, is preferably 1g:30～100ml.Graphite oxide mixes with organic ion uniform liquid, and this organic ion liquid carries out reaction under homogeneous phase condition, and Graphene is had to good dispersiveness, has improved the preparation efficiency of Graphene.Above-mentioned preferred mass volume ratio example, makes Graphene, the contact of organic ion fluid tight, is more conducive to electrical conductivity, is conducive to improve power density.
In this step S02, above-mentioned organic ion liquid is preferably 1-ethyl-3-methylimidazole bromine salt, 1-ethyl-3-methylimidazole villaumite, 1-ethyl-3-methylimidazole salt compounded of iodine, 1-ethyl-2,3-methylimidazole fluoroform sulphonate, 1,2-diethyl-3-methylimidazole fluoroform sulphonate, 1,2-dimethyl-3-ethyl imidazol(e) bromine salt, 1, at least one in 2-dimethyl-3-ethyl imidazol(e) villaumite and 1,2-dimethyl-3-ethyl imidazol(e) tetrafluoroborate.This preferred organic ion liquid can further improve graphene combination electrode thermal stability, conductivity and chemical stability.
In this step S02, the temperature when melting of organic ion liquid is 150～300 DEG C, is preferably 180～250 DEG C.This organic ion liquid is solid-state at ambient temperature, there is no electroneutral molecule, is all anion and cation, and it can operating temperature range wide (40～300 DEG C), has good thermal stability, conductivity and chemical stability.Be heated to after molten state, this organic ion liquid improves the preparation efficiency of Graphene, Graphene is had to good dispersiveness simultaneously.
In this step S02, the power of ultrasonic processing is preferably 400 ~ 800w, and the ultrasonic time of peeling off is preferably 2～24 hours, more preferably 3～5 hours; Centrifugal speed is preferably 1000 ~ 5000 revs/min, more preferably 2500～3000 revs/min; Centrifugation time is preferably 1 ~ 30 minute, more preferably 5～15 minutes.Wherein, ultrasonic peeling off can be carried out in Ultrasound Instrument, in ultrasonic procedure, preferably controls this Ultrasound Instrument constant temperature, is ensure organic viscosity of il stable, is uniformly dispersed to improve Graphene.
In this step S02, reducing agent is preferably hydrazine hydrate or/and ethylenediamine, as selected the hydrazine hydrate of 85wt% or/and ethylenediamine.The addition of this reducing agent is 2 ~ 200ml; The volume ratio of itself and organic ion liquid is preferably 1 ~ 1:5, is preferably 1:2 ~ 4.Reducing agent plays a part to make graphite oxide to be reduced into Graphene.
In above-mentioned steps S03, in mold pressing processing procedure, the pressure of mold pressing processing is 20Mpa, and organic ion liquid is along with the reduction of temperature starts coagulation forming.Mold pressing is processed the electrode die specification adopting and can be selected flexibly according to the needs of actual production, as selected the electrode die of 200mm*300mm specification.
In this step S03, the thickness of above-mentioned graphene combination electrode presoma is 10～100 μ m, more preferably 30～50 μ m.The thickness of this preferred graphene combination electrode presoma can effectively be controlled ion as the bang path of lithium ion.
In above-mentioned steps S04, at above-mentioned graphene combination electrode presoma surface metallization film, its thickness is 2～5 μ m, is preferably 4 μ m; The method of metallizing film is any of spraying, blade coating, spin coating, magnetron sputtering, is preferably spraying.As preferred embodiment, a surface spraying metal film of above-mentioned graphene combination electrode presoma, this kind arranges structure and can further improve the active material proportion in graphene combination electrode; Metal film is preferably copper film or aluminium film, and spraying method is preferably thermal spraying.Any metallizing film at graphene combination electrode presoma serves as collector, can reduce collector weight (at present industry collector standard thickness: aluminium foil 12 μ m, Copper Foil 9 μ m), improve active material proportion; Adopt hot spray process to prepare collector, can reduce the contact resistance of electrode material and collective, thereby be conducive to electrical conductivity, be conducive to improve power density.
The preparation method of above-described embodiment graphene combination electrode, above-mentioned graphite oxide is mixed with organic ion liquid and reducing agent, and be placed in constant temperature in Ultrasound Instrument and separate Graphene, after centrifugal, pour out unnecessary organic ion liquid, obtain the mixture of Graphene and organic ion liquid, then carry out obtaining graphene combination electrode after mold pressing, spray metal film.The method reduced size mixing, the technology for preparing electrode such as batch mixing, coating, further optimize chemical power source manufacturing process, reduce production costs, and raw material sources are wide, be easy to realize industrialization.
Correspondingly, the embodiment of the present invention also provides a kind of chemical power source, and it comprises barrier film, electrode, and described electrode is above-mentioned graphene combination electrode.In order to save length, no longer this graphene combination electrode is repeated at this.Particularly, chemical power source is lithium battery or ultracapacitor.
Barrier film in this chemical power source is prepared from by organic ion liquid above, as above-mentioned organic ion liquid being coated in to thin film coated machine gained; Its thickness is 3～10 μ m, is preferably 8 μ m, the cutting flexibly as required of large I.Adopt organic ion liquid film to serve as barrier film, and (the industry barrier film standard thickness at present: 16～25 μ m), are conducive to improve active material proportion, all can improve the energy density of chemical power source, also can reduce the volume of power supply that do not use polymer separators.In the time that this chemical power source is ultracapacitor, its preparation method is: above graphene combination electrode, barrier film are stacked gradually to formation battery core according to the lamination order of electrode/barrier film/electrode, and then sealing, obtains ultracapacitor.Wherein, barrier film is preferably by organic ion liquid above and is prepared from.In the time that above collector one surface conjunction of graphene combination electrode has metal film (collector), this barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film.
In the time that this chemical power source is lithium ion battery, its preparation method is can be according to the preparation of existing method, and wherein, barrier film is preferably attached at graphene combination electrode and does not spray the one side of aluminium film.
The graphene combination electrode that above-mentioned chemical power source adopts said method to prepare, has above-mentioned internal resistance just because of this graphene combination electrode little, the excellent technique effect that active material content proportion is high, and therefore this chemical power source power density is high.This chemical power source can form according to the existing method encapsulation in this area in addition, its preparation method technology maturation, and condition is easily controlled, and qualification rate is high.
Illustrate above-mentioned graphene combination electrode and preparation method thereof, chemical power source by multiple embodiment below.
Embodiment 1
Graphene combination electrode and preparation method thereof, comprises the steps:
S11: obtain graphite oxide;
50g 500 order native graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S12: take recipe ingredient: be that 1g:10ml takes respectively graphite oxide and 1-ethyl-3-methylimidazole bromine salt (EtMeImBr) by mass volume ratio;
S13: prepare mixture: it is evenly to mix in the melting EtMeImBr organic ion liquid of 150 DEG C that the graphite oxide of step S12 is joined to temperature, add the hydrazine hydrate of 50ml, and be placed in the Ultrasound Instrument that power is 400w constant temperature and peel off 3 hours, with the speed of 3000 revs/min centrifugal 5 minutes, then pour out unnecessary EtMeImBr, obtain the mixture of Graphene and EtMeImBr;
S14: prepare graphene combination electrode: 30g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImBr composite material.Adopt the mode of thermal spraying at the aluminium film of arbitrary, blocky graphite alkene/EtMeImBr composite material spraying 3 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImBr composite material of aluminium film.
A kind of chemical power source, for example ultracapacitor, comprise above-mentioned graphene combination electrode and adopt thin film coated device prepare thickness be 5 μ m the EtMeImBr film that is cut into 200mm*300mm as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImBr barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 2
Graphene combination electrode and preparation method thereof, comprises the steps:
S21: obtain graphite oxide;
50g 500 order Delaniums are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S22: take recipe ingredient: be that 1g:100ml takes respectively graphite oxide and 1-ethyl-3-methylimidazole villaumite (EtMeImCl) by mass volume ratio;
S23: prepare mixture: it is evenly to mix in the organic ion liquid 1-ethyl-3-methylimidazole villaumite (EtMeImCl) of 180 DEG C that the graphite oxide of step S22 is joined to temperature, add the ethylenediamine of 5ml, and be placed in the Ultrasound Instrument that power is 500w constant temperature and peel off 2 hours, with the speed of 4000 revs/min centrifugal 2 minutes, then pour out unnecessary EtMeImCl, obtain the mixture of Graphene and EtMeImCl;
S24: prepare graphene combination electrode: 20g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImCl composite material.Adopt the mode of thermal spraying at the copper film of arbitrary, blocky graphite alkene/EtMeImCl composite material spraying 2 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImCl composite material of copper film.
A kind of chemical power source, for example ultracapacitor, comprise above-mentioned graphene combination electrode and adopt thin film coated device prepare thickness be 3 μ m the EtMeImCl film that is cut into 200mm*300mm as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImCl barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 3
Graphene combination electrode and preparation method thereof, comprises the steps:
S31: obtain graphite oxide;
50g 500 order expanded graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S32: take recipe ingredient: be that 1g:50ml takes respectively graphite oxide and 1-ethyl-3-methylimidazole salt compounded of iodine (EtMeImI) by mass volume ratio;
S33: prepare mixture: it is evenly to mix in melting 1-ethyl-3-methylimidazole salt compounded of iodine (EtMeImI) the organic ion liquid of 160 DEG C that the graphite oxide of step S32 is joined to temperature, add the hydrazine hydrate of 200ml, and be placed in the Ultrasound Instrument that power is 600w constant temperature and peel off 5 hours, with the speed of 2000 revs/min centrifugal 1 minute, then pour out unnecessary EtMeImI, obtain the mixture of Graphene and EtMeImI;
S34: prepare graphene combination electrode: 50g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImI composite material.Adopt the mode of thermal spraying at the aluminium film of arbitrary, blocky graphite alkene/EtMeImI composite material spraying 5 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImI composite material of aluminium film.
A kind of chemical power source, for example ultracapacitor, comprise above-mentioned graphene combination electrode and adopt thin film coated device prepare thickness be 10 μ m the EtMeImI film that is cut into 200mm*300mm as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImI barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 4
Graphene combination electrode and preparation method thereof, comprises the steps:
S41: obtain graphite oxide;
50g 500 order native graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S42: take recipe ingredient: be that 1g:20ml takes respectively graphite oxide and 1-ethyl-2 by mass volume ratio, 3-methylimidazole fluoroform sulphonate (1-Et-2,3-Me
2imCF
3sO
3);
S43: prepare mixture: it is the melting organic ion liquid 1-Et-2 of 200 DEG C that the graphite oxide of step S42 is joined to temperature, 3-Me
2imCF
3sO
3in evenly mix, add the ethylenediamine of 100ml, and be placed in the Ultrasound Instrument that power is 700w constant temperature and peel off 10 hours, with the speed of 5000 revs/min centrifugal 10 minutes, then pour out unnecessary 1-Et-2,3-Me
2imCF
3sO
3, obtain Graphene and 1-Et-2,3-Me
2imCF
3sO
3mixture;
S44: prepare graphene combination electrode: 60g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, opens mould, takes out the sample in mould, just obtain blocky graphite alkene/1-Et-2,3-Me
2imCF
3sO
3composite material.Adopt the mode of thermal spraying at blocky graphite alkene/1-Et-2,3-Me
2imCF
3sO
3the copper film of arbitrary, composite material spraying 2.5 μ m, obtains one side and has sprayed the blocky graphite alkene/1-Et-2 of copper film, 3-Me
2imCF
3sO
3composite material.
A kind of chemical power source, for example ultracapacitor, comprising above-mentioned graphene combination electrode and adopting thin film coated device to prepare thickness is 8 μ m the 1-Et-2 that is cut into 200mm*300mm, 3-Me2ImCF3SO3 film is as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this 1-Et-2,3-Me2ImCF3SO3 barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 5
Graphene combination electrode and preparation method thereof, comprises the steps:
S51: obtain graphite oxide;
50g 500 order Delaniums are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S52: take recipe ingredient: be that 1g:80ml takes respectively graphite oxide and 1,2-diethyl-3-methylimidazole fluoroform sulphonate (1,2-Et by mass volume ratio
2-3-MeImCF
3sO
3);
S53: prepare mixture: it is the melting organic ion liquid 1 of 220 DEG C that the graphite oxide of step S52 is joined to temperature, 2-Et
2-3-MeImCF
3sO
3in evenly mix, add the hydrazine hydrate of 150ml, and be placed in the Ultrasound Instrument that power is 800w constant temperature and peel off 18 hours, with the speed of 5000 revs/min centrifugal 3 minutes, it is unnecessary 1 then to pour out, 2-Et
2-3-MeImCF
3sO
3, obtain Graphene and 1,2-Et
2-3-MeImCF
3sO
3mixture;
S54: prepare graphene combination electrode: 40g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, opens mould, takes out the sample in mould, just obtain blocky graphite alkene/1,2-Et
2-3-MeImCF
3sO
3composite material.Adopt the mode of thermal spraying at blocky graphite alkene/1,2-Et
2-3-MeImCF
3sO
3the aluminium film of arbitrary, composite material spraying 4 μ m, obtains one side and has sprayed blocky graphite alkene/1 of aluminium film, 2-Et
2-3-MeImCF
3sO
3composite material.
A kind of chemical power source, for example ultracapacitor, comprises above-mentioned graphene combination electrode and adopts thin film coated device to prepare thickness being 6 μ m and being cut into 1 of 200mm*300mm, 2-Et
2-3-MeImCF
3sO
3film is as power supply barrier film, and the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this 1,2-Et2-3-MeImCF3SO3 barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, sealing, obtains ultracapacitor.
Embodiment 6
Graphene combination electrode and preparation method thereof, comprises the steps:
S61: obtain graphite oxide;
50g 500 order expanded graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S62: take recipe ingredient: be that 1g:60ml takes respectively graphite oxide and 1,2-dimethyl-3-ethyl imidazol(e) bromine salt (1,2-Me2-3-EtImBr) by mass volume ratio;
S63: prepare mixture: it is the melting organic ion liquid 1 of 250 DEG C that the graphite oxide of step S62 is joined to temperature, in 2-Me2-3-EtImBr, evenly mix, add the ethylenediamine of 120ml, and be placed in the Ultrasound Instrument that power is 500w constant temperature and peel off 10 hours, with the speed of 1000 revs/min centrifugal 8 minutes, then it is unnecessary 1 to pour out, 2-Me
2-3-EtImBr, obtains Graphene and 1,2-Me
2the mixture of-3-EtImBr;
S64: prepare graphene combination electrode: 30g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, opens mould, takes out the sample in mould, just obtain blocky graphite alkene/1,2-Me
2-3-EtImBr composite material.Adopt the mode of thermal spraying at blocky graphite alkene/1,2-Me
2the copper film of arbitrary ,-3-EtImBr composite material spraying 3 μ m, obtains one side and has sprayed blocky graphite alkene/1 of copper film, 2-Me2-3-EtImBr composite material.
A kind of chemical power source, for example ultracapacitor, comprises above-mentioned graphene combination electrode and adopts thin film coated device to prepare thickness being 4 μ m and being cut into 1 of 200mm*300mm, 2-Me
2-3-EtImBr film is as power supply barrier film, and the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this 1,2-Me
2-3-EtImBr barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 7
Graphene combination electrode and preparation method thereof, comprises the steps:
S71: obtain graphite oxide;
50g 500 order native graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S72: take recipe ingredient: be that 1g:40ml takes respectively graphite oxide and 1,2-Me2-3-EtImCl by mass volume ratio;
S73: prepare mixture: it is the melting organic ion liquid 1 of 280 DEG C that the graphite oxide of step S72 is joined to temperature, 2-dimethyl-3-ethyl imidazol(e) villaumite (1,2-Me
2-3-EtImCl) in evenly mix, add the hydrazine hydrate of 80ml, and be placed in the Ultrasound Instrument that power is 600w constant temperature and peel off 15 hours, with the speed of 2000 revs/min centrifugal 7 minutes, it is unnecessary 1 then to pour out, 2-Me
2-3-EtImCl, obtains Graphene and 1,2-Me
2the mixture of-3-EtImCl;
S74: prepare graphene combination electrode: 25g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, opens mould, takes out the sample in mould, just obtain blocky graphite alkene/1,2-Me
2-3-EtImCl composite material.Adopt the mode of thermal spraying at blocky graphite alkene/1,2-Me
2the aluminium film of arbitrary ,-3-EtImCl composite material spraying 2 μ m, obtains one side and has sprayed blocky graphite alkene/1 of aluminium film, 2-Me
2-3-EtImCl composite material.
A kind of chemical power source, for example ultracapacitor, comprises above-mentioned graphene combination electrode and adopts thin film coated device to prepare thickness being 7 μ m and being cut into 1 of 200mm*300mm, 2-Me
2-3-EtImCl film is as power supply barrier film, and the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this 1,2-Me
2-3-EtImCl barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 8
Graphene combination electrode and preparation method thereof, comprises the steps:
S81: obtain graphite oxide;
50g 500 order Delaniums are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S82: take recipe ingredient: be that 1g:30ml takes respectively graphite oxide and 1,2-dimethyl-3-ethyl imidazol(e) tetrafluoroborate (1,2-Me by mass volume ratio
2-3-EtImBF
4);
S83: prepare mixture: it is the melting organic ion liquid 1 of 300 DEG C that the graphite oxide of step S82 is joined to temperature, 2-Me
2in-3-EtImBF4, evenly mix, add the ethylenediamine of 30ml, and be placed in the Ultrasound Instrument that power is 700w constant temperature and peel off 20 hours, with the speed of 1500 revs/min centrifugal 6 minutes, it is unnecessary 1 then to pour out, 2-Me
2-3-EtImBF4, obtains Graphene and 1,2-Me
2the mixture of-3-EtImBF4;
S84: prepare graphene combination electrode: 40g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, opens mould, takes out the sample in mould, just obtain blocky graphite alkene/1,2-Me
2-3-EtImBF4 composite material.Adopt the mode of thermal spraying at blocky graphite alkene/1,2-Me
2the copper film of arbitrary ,-3-EtImBF4 composite material spraying 5 μ m, obtains one side and has sprayed blocky graphite alkene/1 of copper film, 2-Me
2-3-EtImBF4 composite material.
A kind of chemical power source, for example ultracapacitor, comprises above-mentioned graphene combination electrode and adopts thin film coated device to prepare thickness being 5 μ m and being cut into 1 of 200mm*300mm, 2-Me
2-3-EtImBF4 film is as power supply barrier film, and the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this 1,2-Me
2-3-EtImBF4 barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 9
Graphene combination electrode and preparation method thereof, comprises the steps:
S91: obtain graphite oxide;
50g 500 order expanded graphites are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S92: take recipe ingredient: be that 1g:100ml takes respectively graphite oxide and EtMeImBr by mass volume ratio;
S93: prepare mixture: it is evenly to mix in the melting organic ion liquid 1-ethyl-3-methylimidazole bromine salt (EtMeImBr) of 200 DEG C that the graphite oxide of step S92 is joined to temperature, add the hydrazine hydrate of 20ml, and be placed in the Ultrasound Instrument that power is 400w constant temperature and peel off 24 hours, with the speed of 2500 revs/min centrifugal 2 minutes, then pour out unnecessary EtMeImBr, obtain the mixture of Graphene and EtMeImBr;
S94: prepare graphene combination electrode: 45g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImBr composite material.Adopt the mode of thermal spraying at the aluminium film of arbitrary, blocky graphite alkene/EtMeImBr composite material spraying 5 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImBr composite material of aluminium film.
A kind of chemical power source, for example ultracapacitor, comprising above-mentioned graphene combination electrode and adopting thin film coated device to prepare thickness is that 10 μ m the EtMeImBr film that is cut into 200mm*300mm are as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImBr barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 10
Graphene combination electrode and preparation method thereof, comprises the steps:
S101: obtain graphite oxide;
50g 500 order Delaniums are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S102: take recipe ingredient: be that 1g:10ml takes respectively graphite oxide and EtMeImCl by mass volume ratio;
S103: prepare mixture: it is evenly to mix in the melting organic ion liquid 1-ethyl-3-methylimidazole villaumite (EtMeImCl) of 210 DEG C that the graphite oxide of step S102 is joined to temperature, add the ethylenediamine of 10ml, and be placed in the Ultrasound Instrument that power is 800w constant temperature and peel off 12 hours, with the speed of 1000 revs/min centrifugal 10 minutes, then pour out unnecessary EtMeImCl, obtain the mixture of Graphene and EtMeImCl;
S104: prepare graphene combination electrode: 60g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImCl composite material.Adopt the mode of thermal spraying at the copper film of arbitrary, blocky graphite alkene/EtMeImCl composite material spraying 2 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImCl composite material of copper film.
A kind of chemical power source, for example ultracapacitor, comprise above-mentioned graphene combination electrode and adopt thin film coated device prepare thickness be 9 μ m the EtMeImCl film that is cut into 200mm*300mm as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImCl barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
Embodiment 11
Graphene combination electrode and preparation method thereof, comprises the steps:
S111: obtain graphite oxide;
50g 500 order Delaniums are added in 0 DEG C, the concentrated sulfuric acid of 1.15L, then add 150g potassium permanganate, the temperature of mixture to remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add 4.6L deionized water.After 15min, then add 14L deionized water (wherein contain 250mL concentration be 30% hydrogen peroxide), mixture color becomes glassy yellow afterwards, suction filtration, then with the hydrochloric acid that 2.5L concentration is 10% wash, suction filtration, until filtrate is neutral.
S112: take recipe ingredient: be that 1g:50ml takes respectively graphite oxide and 1-ethyl-2 by mass volume ratio, 3-methylimidazole fluoroform sulphonate (EtMeImI);
S113: prepare mixture: it is evenly to mix in the melting organic ion liquid EtMeImI of 230 DEG C that the graphite oxide of step S112 is joined to temperature, add the hydrazine hydrate of 50ml, and be placed in the Ultrasound Instrument that power is 500w constant temperature and peel off 2 hours, with the speed of 5000 revs/min centrifugal 1 minute, then pour out unnecessary EtMeImI, obtain the mixture of Graphene and EtMeImI;
S114: prepare graphene combination electrode: 50g said mixture is placed in the mould of 200mm*300mm, add die cover, to the constant pressure that applies 20MPa of mould, until die cover is no longer after mold bottom motion, mould keeps this pressure until be cooled to room temperature, open mould, take out the sample in mould, just obtain blocky graphite alkene/EtMeImI composite material.Adopt the mode of thermal spraying at the aluminium film of arbitrary, blocky graphite alkene/EtMeImI composite material spraying 4 μ m, obtain one side and sprayed blocky graphite alkene/EtMeImI composite material of aluminium film.
A kind of chemical power source, for example ultracapacitor, comprise above-mentioned graphene combination electrode and adopt thin film coated device prepare thickness be 5 μ m the EtMeImI film that is cut into 200mm*300mm as power supply barrier film, the alternately laminated setting of this graphene combination electrode and barrier film, is placed on battery container; Wherein, this EtMeImI barrier film is attached at graphene combination electrode and does not spray the one side of aluminium film, and sealing, obtains ultracapacitor.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments 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 preparation method for graphene combination electrode, is characterized in that, comprises the steps:
Be 1g:5～1000ml by mass volume ratio, graphite oxide joined in the organic ion liquid of melting and mix, obtain the mixed solution of melting; In mixed solution, add reducing agent subsequently, and carry out ultrasonic and centrifugal treating, obtain the mixture of Graphene and organic ion liquid;
Described mixture is carried out to mold pressing processing, obtain described graphene combination electrode presoma after cooling;
At described graphene combination electrode presoma surface metallization film, obtain described graphene combination electrode.
2. the preparation method of graphene combination electrode according to claim 1, is characterized in that, described graphite oxide adopts following steps to make:
According to the mass volume ratio of 50g:1.15L, graphite powder is added in the concentrated sulfuric acid of 0 DEG C, then add potassium permanganate, the quality of potassium permanganate is 3 times of graphite, and remain on below 10 DEG C, stir 2h, then stir after 24h in room-temperature water bath, under condition of ice bath, slowly add deionized water, add again the deionized water that contains hydrogen peroxide, carry out afterwards suction filtration, screening again with the hydrochloric acid that concentration is 10% wash, suction filtration, until filtrate is neutral, obtain graphite oxide.
3. the preparation method of graphene combination electrode according to claim 1, it is characterized in that, described organic ion liquid is the solid-state shape ionic liquid under normal temperature, described organic ion liquid is 1-ethyl-3-methylimidazole bromine salt, 1-ethyl-3-methylimidazole villaumite, 1-ethyl-3-methylimidazole salt compounded of iodine, 1-ethyl-2, 3-methylimidazole fluoroform sulphonate, 1, 2-diethyl-3-methylimidazole fluoroform sulphonate, 1, 2-dimethyl-3-ethyl imidazol(e) bromine salt, 1, 2-dimethyl-3-ethyl imidazol(e) villaumite and 1, at least one in 2-dimethyl-3-ethyl imidazol(e) tetrafluoroborate.
4. the preparation method of graphene combination electrode according to claim 1, is characterized in that, the temperature when melting of described organic ion liquid is 150 ~ 300 DEG C.
5. the preparation method of graphene combination electrode according to claim 1, is characterized in that, described reducing agent is that mass concentration is 85% hydrazine hydrate or ethylenediamine; The addition of described reducing agent is 2 ~ 200ml.
6. the preparation method of graphene combination electrode according to claim 1, is characterized in that, the power of described ultrasonic processing is 400 ~ 800w, and ultrasonic time is 2 ~ 24h.
7. the preparation method of graphene combination electrode according to claim 1, is characterized in that, centrifugal rotational speed when described centrifugal treating is 1000 ~ 5000 revs/min, centrifugal treating 1 ~ 30 minute.
8. the preparation method of graphene combination electrode according to claim 1, is characterized in that, pressure when described mold pressing is processed is 20MPa.
9. the preparation method of graphene combination electrode according to claim 1, is characterized in that, described metallic film is copper film or aluminium film.
10. the preparation method of graphene combination electrode according to claim 8, is characterized in that, the thickness of described metallic film is 2 ~ 5um.
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