CN103700823A - Carbon nano tube dispersion liquid and preparation method thereof - Google Patents
Carbon nano tube dispersion liquid and preparation method thereof Download PDFInfo
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- CN103700823A CN103700823A CN201310743776.8A CN201310743776A CN103700823A CN 103700823 A CN103700823 A CN 103700823A CN 201310743776 A CN201310743776 A CN 201310743776A CN 103700823 A CN103700823 A CN 103700823A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 104
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 104
- 239000006185 dispersion Substances 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000002904 solvent Substances 0.000 claims abstract description 34
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims description 68
- 239000002270 dispersing agent Substances 0.000 claims description 38
- 238000003801 milling Methods 0.000 claims description 38
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 150000004040 pyrrolidinones Chemical class 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000009736 wetting Methods 0.000 claims description 8
- 239000013557 residual solvent Substances 0.000 claims description 4
- 239000002048 multi walled nanotube Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 238000010923 batch production Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000006229 carbon black Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 238000002389 environmental scanning electron microscopy Methods 0.000 description 6
- 238000007790 scraping Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention provides a carbon nano tube dispersion liquid and a preparation method of the carbon nano tube dispersion liquid. The carbon nano tube dispersion liquid comprises a carbon nano tube, a high conductivity carbon black, a dispersion agent and a solvent. The carbon nano tube dispersion liquid is uniform and stable, and also excellent in consistency, mobility, dispersion and glossiness, the high conductivity carbon black is in the dispersion liquid to further improve the performance of the carbon nano tube dispersion liquid, so that the application of the carbon nano tube dispersion liquid is more extensive. The carbon nano tube dispersion liquid can be dispersed only through being grinded by a regular grinding machine, the preparation of the carbon nano tube dispersion liquid is simpler and more practical, the dispersion is completed only through the cheap grinding machine in the preparation method, in addition, the yield is high, the safety performance is excellent, the operation is simple, the dispersion efficiency is high, the dispersion cost is greatly lowered, the production quality is improved, and the carbon nano tube dispersion liquid is more suitable for batch production as well as large-scale production and application.
Description
Technical field
The invention belongs to carbon nano-tube material field, relate in particular to a kind of carbon nano tube dispersion liquid and preparation method thereof.
Background technology
The dispersion technology majority of carbon nano-tube is only confined to laboratory at present, generally adopts and adds dispersant ultrasonic process for dispersing, and it is limited to production efficiency, security problems, can not be applied to batch production, is difficult to large-scale industrialization production and applies.
And along with the application of carbon nano-tube in conduction, heat conduction field constantly promotes, market also increases gradually to the demand of carbon nano-tube, wipe away the carbon nano tube dispersion liquid of a kind of low cost to be developed, high efficiency, more friendly, batch production preferably.
Summary of the invention
The present invention is in order to solve the technical problem of the difficult large-scale mass production of existing carbon nano tube dispersion liquid, provides that a kind of cost is low, efficiency is high, the carbon nano tube dispersion liquid of more friendly, batch production preferably and preparation method thereof.
First object of the present invention is to provide a kind of carbon nano tube dispersion liquid, and wherein, carbon nano tube dispersion liquid comprises carbon nano-tube, high conductive black, dispersant and solvent.
Second object of the present invention is to provide a kind of preparation method of carbon nano tube dispersion liquid, and wherein, step comprises: carbon nano-tube, high conductive black and dispersant are scattered in solvent, grind to obtain carbon nano tube dispersion liquid.
The present invention surprisingly finds carbon nano tube dispersion liquid homogeneous of the present invention, stable, high conformity, there is good mobility, dispersiveness and glossiness, and in dispersion liquid, contain high conductive black, the method of disperseing by high conductive black composite dispersion liquid, can make full use of the how heterotropic feature of high conductive black, carbon nanotube conducting network is further improved, be applied to lithium ion battery field, not only there is higher conductivity, unexpected especially this carbon nano tube dispersion liquid of discovery has higher imbibition liquid-keeping property to electrolyte, and can improve ionic conductivity, can obviously improve battery performance.Carbon nano tube dispersion liquid of the present invention only needs to dispersible by conventional grinding; its preparation technology is simple, dispersed high; in preparation method of the present invention, disperseing only needs can complete by cheap milling apparatus; and rate of finished products is high, security performance is good, simple to operate, efficiency is high; can greatly reduce dispersion cost; improve the quality of products, batch production preferably, is suitable for the production application of large-scale.
Accompanying drawing explanation
Fig. 1 is the SEM(ESEM of the carbon nano tube dispersion liquid sample S2 of embodiments of the invention 2 preparations) figure;
Fig. 2 is the SEM(ESEM of the carbon nano tube dispersion liquid sample S3 of embodiments of the invention 3 preparations) figure;
Fig. 3 is the SEM(ESEM of the carbon nano tube dispersion liquid sample S5 of embodiments of the invention 5 preparations) figure;
Fig. 4 is the SEM(ESEM of the carbon nano tube dispersion liquid sample S7 of embodiments of the invention 7 preparations) figure;
Fig. 5 is the SEM(ESEM of the carbon nano tube dispersion liquid sample DS1 of comparative example 1 preparation of the present invention) figure;
Fig. 6 is the SEM(ESEM of the carbon nano tube dispersion liquid sample DS2 of comparative example 2 preparations of the present invention) figure.
Embodiment
In order to make technical problem solved by the 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 invention provides a kind of carbon nano tube dispersion liquid, wherein, carbon nano tube dispersion liquid comprises carbon nano-tube, high conductive black, dispersant and solvent, dispersion liquid homogeneous, stable, high conformity, and in dispersion liquid, contain high conductive black, carbon nanotube conducting network is further improved, further improves the performance of carbon nano tube dispersion liquid.
It is benchmark that the weight percentage of carbon nano tube dispersion liquid is preferably take in the present invention, and described carbon nano tube dispersion liquid comprises the carbon nano-tube of 2.0-6.0wt%, the high conductive black of 2.0-6.0wt%, the dispersant of 0.4-1.0wt% and the solvent of 88-94wt%.
Preferably, high conductive black is the high conductive black that oil factor is larger, and concrete can be greater than 100M for oil factor
2the high conductive black of/g.
Wherein, carbon nano-tube the present invention is restriction not, and preferably carbon nano-tube is multi-walled carbon nano-tubes, and further preferably the caliber of carbon nano-tube is 30nm-60nm, and the pipe range of carbon nano-tube is 5 μ m-20 μ m.
Dispersant preferred dispersants of the present invention is nonionic surface active agent, and concrete can be PVP.
Solvent the present invention can be also water for organic solvent, and preferred solvent of the present invention is 1-METHYLPYRROLIDONE or pure water.
The present invention provides a kind of preparation method of carbon nano tube dispersion liquid simultaneously, and step comprises: carbon nano-tube, high conductive black and dispersant are scattered in solvent, grind to obtain carbon nano tube dispersion liquid.
Wherein, carbon nano-tube, high conductive black and dispersant add the order the present invention in solvent to add by the mode of solvent, carbon nano-tube, dispersant, high conductive black, also can adjust according to actual conditions.
Preferentially, the temperature of grinding is 20 ℃ to 60 ℃, further improves the performance of carbon nano tube dispersion liquid, can avoid high temperature to cause the reunion again of the carbon nano-tube of dispersion.
Preferably, step comprises: in S1, the environment in humidity lower than 30%R.Hs, partial solvent 1-METHYLPYRROLIDONE is packed in basket type sand mill, then add carbon nano-tube, low frequency stirs the wetting carbon nano-tube of 5-10min, rear high frequency sand milling 0.5-1h.S2, the dispersant solution of residual solvent 1-METHYLPYRROLIDONE and polyethylene of dispersing agent base pyrrolidones configuration is packed in above-mentioned basket type sand mill, control 20 ℃～60 ℃ of sand milling temperature, high frequency sand milling 1-2h.S3, high conductive black is packed in above-mentioned basket type sand mill, high frequency sand milling 5-7h makes carbon nano tube dispersion liquid.
Concrete can be:
S1: under normal-temp .-dehumidifying environment (humidity is lower than 30%R.Hs), solvent 1-METHYLPYRROLIDONE is poured in basket type sand mill, and additionally reserved enough solvents are used for dissolving polyethylene of dispersing agent base pyrrolidones.Polyethylene of dispersing agent base pyrrolidones is slowly poured in reserved solvent and do not stopped stirring at low speed wiring solution-forming, and it is limpid and slightly light yellow that standing rear dispersant solution is.
S2: open 20 ℃ of cooling circulating waters, make in sand grinding process slurry temperature between 20 ℃～60 ℃, carbon nano-tube is poured in the solvent in basket type sand mill, and it is wetting with 10Hz low frequency, to stir 5-10min quickening carbon nano-tube, promote subsequently sand milling basket and carry out putting down sand milling basket after scraping, with 35Hz, carry out sand milling 0.5-1h.
S3: the dispersant solution preparing is poured in basket type sand mill, carried out sand milling 1-2h with 35Hz.
S4: high conductive black is poured in basket type sand mill, carried out sand milling 5-7h with 40Hz.
S5: carry out fineness test with Hegman grind gage, make required carbon nano tube dispersion liquid when following when slurry fineness show value reaches 4 μ m.
Or preferably, step comprises: under S1, normal temperature, partial solvent water is packed in basket type sand mill, then add carbon nano-tube, low frequency stirs the wetting carbon nano-tube of 5-10min, rear high frequency sand milling 0.5-1h.S2, the dispersant solution of residual solvent water and polyethylene of dispersing agent base pyrrolidones configuration is packed in above-mentioned basket type sand mill, control 20 ℃～60 ℃ of sand milling temperature, high frequency sand milling 3-4h.S3, high conductive black is packed in above-mentioned basket type sand mill, high frequency sand milling 5-7h makes carbon nano tube dispersion liquid.
Concrete can be:
S1: under normal temperature, solvent pure water is poured in basket type sand mill, and additionally reserved enough solvents are used for dissolving polyethylene of dispersing agent base pyrrolidones.Polyethylene of dispersing agent base pyrrolidones is slowly poured in reserved solvent and do not stopped stirring at low speed wiring solution-forming, and it is limpid and slightly light yellow that standing rear dispersant solution is.
S2: open 20 ℃ of cooling circulating waters, make in sand grinding process slurry temperature between 20 ℃～60 ℃, carbon nano-tube is poured in the solvent in basket type sand mill, and it is wetting with 10Hz low frequency, to stir 5-10min quickening carbon nano-tube, promote subsequently sand milling basket and carry out putting down sand milling basket after scraping, with 35Hz, carry out sand milling 0.5-1h.
S3: the dispersant solution preparing is poured in basket type sand mill, carried out sand milling 3-4h with 35Hz.
S4: high conductive black is poured in basket type sand mill, carried out sand milling 5-7h with 40Hz.
S5: carry out fineness test with Hegman grind gage, make required carbon nano tube dispersion liquid when following when slurry fineness show value reaches 4 μ m.
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1-4
(1): under normal-temp .-dehumidifying environment (humidity is lower than 30%R.Hs), solvent 1-METHYLPYRROLIDONE is poured in basket type sand mill, and additionally reserved enough solvents are used for dissolving polyethylene of dispersing agent base pyrrolidones.Polyethylene of dispersing agent base pyrrolidones is slowly poured in reserved solvent and do not stopped stirring at low speed wiring solution-forming, and it is limpid and slightly light yellow that standing rear dispersant solution is.
(2): open 20 ℃ of cooling circulating waters, make in sand grinding process slurry temperature between 20 ℃～60 ℃, carbon nano-tube is poured in the solvent in basket type sand mill, and it is wetting with 10Hz low frequency, to stir 5-10min quickening carbon nano-tube, promote subsequently sand milling basket and carry out putting down sand milling basket after scraping, with 35Hz, carry out sand milling 0.5-1h.
(3): the dispersant solution preparing is poured in basket type sand mill, with 35Hz, carried out sand milling 1-2h.
(4): high conductive black is poured in basket type sand mill, with 40Hz, carried out sand milling 5-7h.
(5): with Hegman grind gage, carry out fineness test, when slurry fineness show value reaches 4 μ m, make below carbon nano tube dispersion liquid sample S1-S4.
Wherein, the raw material using in said method is as follows respectively:
Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5-8
(1): under normal temperature, solvent pure water is poured in basket type sand mill, and additionally reserved enough solvents are used for dissolving polyethylene of dispersing agent base pyrrolidones.Polyethylene of dispersing agent base pyrrolidones is slowly poured in reserved solvent and do not stopped stirring at low speed wiring solution-forming, and it is limpid and slightly light yellow that standing rear dispersant solution is.
(2): open 20 ℃ of cooling circulating waters, make in sand grinding process slurry temperature between 20 ℃～60 ℃, carbon nano-tube is poured in the solvent in basket type sand mill, and it is wetting with 10Hz low frequency, to stir 5-10min quickening carbon pipe, promote subsequently sand milling basket and carry out putting down sand milling basket after scraping, with 35Hz, carry out sand milling 0.5-1h.
(3): the dispersant solution preparing is poured in basket type sand mill, with 35Hz, carried out sand milling 3-4h.
(4): high conductive black is poured in basket type sand mill, with 40Hz, carried out sand milling 5-7h.
(5): with Hegman grind gage, carry out fineness test, when slurry fineness show value reaches 4 μ m, make below carbon nano tube dispersion liquid sample S5-S8.
Wherein, the raw material using in said method is as follows respectively:
Embodiment 5:
Embodiment 6
Embodiment 7
Embodiment 8:
Comparative example 1
Raw material: 30nm-60nm caliber carbon nano-tube-9.4%
PVP-0.6%
1-METHYLPYRROLIDONE-90%
Carbon nano-tube, PVP are joined in 1-METHYLPYRROLIDONE to the ultrasonic dispersion of 40Hz 10h at 50 ℃ and make carbon nano tube dispersion liquid sample DS1.
Comparative example 2
Raw material: 30nm-60nm caliber carbon nano-tube-8.0%
PVP-0.6%
Pure water-91.4%
Carbon nano-tube, the PVP ultrasonic dispersion of the 40Hz 12h at 50 ℃ that is added to the water is made to carbon nano tube dispersion liquid sample DS2.
Performance test
Dispersed, stability: checkout equipment, adopt (Shanghai rib light) ultraviolet specrophotometer, model 752s, selects wavelength 800nm, blank sample is NMP(N-methyl pyrrolidone).Carbon nano tube dispersion liquid sample S1-S8 and DS1-DS2 are tested, and test result is as table 1.
Fineness: normative reference, fineness gauge determination method GB172479; Checkout equipment, the Central Asia, Tianjin QXD-25 type Hegman grind gage; Testing conditions, 22 ± 1 ℃ of room temperatures, relative humidity 70%R.H; Detecting step, 1. with alcohol, clean scraper plate and scraper, and with cotton yarn dry 2. with glass bar dip in a little even testing sample splash into slot scraping bosom 3. both hands in being pulled through 4. for 5 seconds by deep trouth place to shallow place with scraper on scraper plate, observe groove endoparticle and evenly appear place, corresponding numerical value is grain fineness.Carbon nano tube dispersion liquid sample S1-S8 and DS1-DS2 are tested, and test result is as table 1.
SEM test: normative reference, GB/T17359-1998, GB/T16594-1996, JY/T010-1996; Accelerating voltage: 5.0KV, tests carbon nano tube dispersion liquid sample S2, S3, S5, S7 and DS1, DS2, and test result is as accompanying drawing 1-6.
Table 1
| Sample | Fineness (μ m) | Stability (%) | Dispersed |
| S1 | 2.8 | 83.2 | 1.478 |
| S2 | 2.5 | 81.7 | 1.327 |
| S3 | 2.6 | 84.1 | 1.566 |
| S4 | 2.5 | 82.7 | 1.521 |
| S5 | 3.0 | 84.6 | 1.393 |
| S6 | 2.6 | 87 | 1.185 |
| S7 | 2.8 | 85.2 | 1.468 |
| S8 | 3.0 | 83.3 | 1.507 |
| DS1 | 4.7 | 64.1 | 0.832 |
| DS2 | 4.2 | 61.7 | 0.694 |
Carbon nano tube dispersion liquid homogeneous of the present invention, stable, high conformity; carbon nano tube dispersion liquid of the present invention only needs to dispersible by conventional grinding; its preparation more simply, more practical; in preparation method of the present invention, disperseing only needs can complete by cheap milling apparatus; and rate of finished products is high, security performance is good, simple to operate, efficiency is high, can greatly reduce dispersion cost, improves the quality of products; batch production preferably, is suitable for the production application of large-scale.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications 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 carbon nano tube dispersion liquid, is characterized in that, described carbon nano tube dispersion liquid comprises carbon nano-tube, high conductive black, dispersant and solvent.
2. carbon nano tube dispersion liquid according to claim 1, it is characterized in that, the weight percentage of carbon nano tube dispersion liquid of take is benchmark, and described carbon nano tube dispersion liquid comprises the carbon nano-tube of 2.0-6.0wt%, the high conductive black of 2.0-6.0wt%, the dispersant of 0.4-1.0wt% and the solvent of 88-94wt%.
3. carbon nano tube dispersion liquid according to claim 1, is characterized in that, described high conductive black is that oil factor is greater than 100M
2the high conductive black of/g.
4. carbon nano tube dispersion liquid according to claim 1, is characterized in that, described carbon nano-tube is multi-walled carbon nano-tubes; The caliber of described carbon nano-tube is 30nm-60nm, and the pipe range of described carbon nano-tube is 5 μ m-20 μ m.
5. carbon nano tube dispersion liquid according to claim 1, is characterized in that, described dispersant is nonionic surface active agent.
6. carbon nano tube dispersion liquid according to claim 1, is characterized in that, described solvent is 1-METHYLPYRROLIDONE or water.
7. a preparation method for carbon nano tube dispersion liquid, is characterized in that, step comprises: carbon nano-tube, high conductive black and dispersant are scattered in solvent, grind to obtain carbon nano tube dispersion liquid.
8. preparation method according to claim 7, is characterized in that, the temperature of described grinding is 20 ℃ to 60 ℃.
9. preparation method according to claim 7, is characterized in that, step comprises:
In S1, the environment in humidity lower than 30%R.Hs, partial solvent 1-METHYLPYRROLIDONE is packed in basket type sand mill, then add carbon nano-tube, low frequency stirs the wetting carbon nano-tube of 5-10min, rear high frequency sand milling 0.5-1h;
S2, the dispersant solution of residual solvent 1-METHYLPYRROLIDONE and polyethylene of dispersing agent base pyrrolidones configuration is packed in above-mentioned basket type sand mill, control 20 ℃～60 ℃ of sand milling temperature, high frequency sand milling 1-2h;
S3, high conductive black is packed in above-mentioned basket type sand mill, high frequency sand milling 5-7h makes carbon nano tube dispersion liquid.
10. preparation method according to claim 7, is characterized in that, step comprises:
Under S1, normal temperature, partial solvent water is packed in basket type sand mill, then add carbon nano-tube, low frequency stirs the wetting carbon nano-tube of 5-10min, rear high frequency sand milling 0.5-1h;
S2, the dispersant solution of residual solvent water and polyethylene of dispersing agent base pyrrolidones configuration is packed in above-mentioned basket type sand mill, control 20 ℃～60 ℃ of sand milling temperature, high frequency sand milling 3-4h;
S3, high conductive black is packed in above-mentioned basket type sand mill, high frequency sand milling 5-7h makes carbon nano tube dispersion liquid.
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| CN104868125A (en) * | 2015-04-21 | 2015-08-26 | 深圳市三顺中科新材料有限公司 | Carbon nano tube and carbon black composite dispersing liquid and preparation method thereof |
| CN106229032A (en) * | 2016-08-03 | 2016-12-14 | 深圳市三顺中科新材料有限公司 | A kind of composite conducting slurry of lithium ion battery plus-negative plate and preparation method thereof |
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| CN107819110A (en) * | 2016-09-13 | 2018-03-20 | 深圳市金润能源材料有限公司 | Lithium ion battery negative material and preparation method thereof |
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