CN110491546A - Carbon nanotube conducting slurry and preparation method thereof - Google Patents
Carbon nanotube conducting slurry and preparation method thereof Download PDFInfo
- Publication number
- CN110491546A CN110491546A CN201910684636.5A CN201910684636A CN110491546A CN 110491546 A CN110491546 A CN 110491546A CN 201910684636 A CN201910684636 A CN 201910684636A CN 110491546 A CN110491546 A CN 110491546A
- Authority
- CN
- China
- Prior art keywords
- carbon nanotube
- slurry
- nanotube conducting
- conducting slurry
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Materials Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to conductive material technical fields, and in particular to a kind of carbon nanotube conducting slurry and preparation method thereof.The carbon nanotube conducting slurry includes the ingredient of following mass percentage: the first carbon nanotube 0.1-0.5%；Second carbon nanotube 0.1-1%；Dispersing agent 0.1-5.2%；Binder 0.5-4%；Surplus is solvent；Wherein, the length of first carbon nanotube is 100-300 μm, diameter 5-40nm；The length of second carbon nanotube is 10-20 μm, diameter 30-100nm.The carbon nanotube conducting slurry is the high conductivity advantage that the first carbon nanotube is utilized, the polymolecularity advantage of the second carbon nanotube is utilized again, finally, not only reduce the viscosity of electrocondution slurry, improve the mobility of electrocondution slurry, and the carbon content in electrocondution slurry is improved, to further increase the electric conductivity of carbon nanotube conducting slurry.
Description
Technical field
The invention belongs to conductive material technical fields, and in particular to a kind of carbon nanotube conducting slurry and preparation method thereof.
Background technique
Carbon nanotube (Carbon Nanotubes, CNTs) also known as Baji-tube are a kind of with special construction (radial dimension
For nanometer scale, axial dimension is micron dimension) One-dimensional Quantum material.In recent years with carbon nanotube and nano materials research
Go deep into, wide application prospect is also constantly shown.For example, carbon nanotube is for the conduction in lithium ion battery
Agent.
Existing carbon nanotube conducting slurry generallys use the lesser carbon nanotube of draw ratio, to obtain preferably dispersion, but
This can lose the performance of carbon nanotube to a certain extent.The specific surface area of carbon nanotube of high length-diameter ratio is big, it is difficult to disperses, and
Its concentration is higher, prepares that resulting slurry viscosity is bigger, and mobility is poorer, is not easy to the preparation of electrocondution slurry, subsequent production adds
Work or transportation metering.How to disperse the higher carbon nanotube of draw ratio in the slurry to give full play to carbon nanotube advantage is
Focus on research direction in field.
Therefore, the prior art has much room for improvement.
Summary of the invention
The purpose of the present invention is to provide a kind of carbon nanotube conducting slurries and preparation method thereof, it is intended to solve existing carbon and receive
The dispersibility of the mitron electrocondution slurry technical problem bad with the resultant effect of electric conductivity.
For achieving the above object, The technical solution adopted by the invention is as follows:
One aspect of the present invention provides a kind of carbon nanotube conducting slurry, and the gross mass with the carbon nanotube conducting slurry is
100% meter, the carbon nanotube conducting slurry includes the ingredient of following mass percentage:
Wherein, the length of first carbon nanotube is 100-300 μm, diameter 5-40nm；Second carbon nanotube
Length be 10-20 μm, diameter 30-100nm.
In carbon nanotube conducting slurry provided by the invention, a certain amount of first carbon nanotube and the second carbon nanometer joined
Pipe, wherein the first carbon nanotube is high length-diameter ratio (length is 100-300 μm, diameter 5-40nm), and the second carbon nanotube is low
Draw ratio (length is 10-20 μm, diameter 30-100nm), is utilized the high conductivity advantage of the first carbon nanotube in this way,
The polymolecularity advantage of the second carbon nanotube is utilized again, finally, not only reduces the viscosity of carbon nanotube conducting slurry, improves
The mobility of carbon nanotube conducting slurry, and the carbon content in carbon nanotube conducting slurry is improved, to further increase
The electric conductivity of carbon nanotube conducting slurry.
Another aspect of the present invention provides a kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
Each component materials are weighed respectively according to ingredient contained by carbon nanotube conducting slurry of the present invention and its content；
First carbon nanotube, second carbon nanotube, the dispersing agent and the solvent are subjected to the first mixing
Processing, obtains the first mixing slurry；
The binder is added in first mixing slurry and carries out the second mixed processing, obtains carbon nanotube conducting slurry
Material.
The preparation method of carbon nanotube conducting slurry provided by the invention is for closing slurry into the distinctive carbon nanotube of the present invention
First carbon nanotube, the second carbon nanotube, dispersing agent and solvent in the preparation method, are first carried out the first mixing by electrocondution slurry
Then processing is added the second mixed processing of binder progress and obtains carbon nanotube conducting slurry.Because joined in the preparation method
The first carbon nanometer is utilized in first carbon nanotube of a certain amount of high length-diameter ratio and the second carbon nanotube of low draw ratio in this way
The high conductivity advantage of pipe, and the polymolecularity advantage of the second carbon nanotube is utilized, finally, not only reduces carbon nanotube and lead
The viscosity of plasma-based material improves the mobility of carbon nanotube conducting slurry, and the carbon improved in carbon nanotube conducting slurry contains
Amount, to further increase the electric conductivity of carbon nanotube conducting slurry.Moreover, because defect is few in turn for production high length-diameter ratio
Carbon nanotube manufacture craft all requirements are very high, and natural cost of manufacture is also got higher therewith, relatively, the carbon nanometer of low draw ratio
Pipe cost of manufacture is very low, and therefore, when being used in mixed way two kinds of carbon nanotubes, which can also be reduced very much.
Detailed description of the invention
Fig. 1 is the preparation method flow chart of carbon nanotube conducting slurry provided by the invention.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain
The present invention is not intended to limit the present invention.
The mass percent of Related Component noted in the disclosure of the embodiment of the present invention not only may refer to each component
Content can also indicate weight ratio between each component, and specifically, weight described in the specification of the embodiment of the present invention can be μ
G, the medicine such as mg, g, kg, mass unit well known to chemical field.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.
On the one hand, the embodiment of the invention provides a kind of carbon nanotube conducting slurries, with the carbon nanotube conducting slurry
Gross mass be 100% meter, the carbon nanotube conducting slurry includes the ingredient of following mass percentage:
Wherein, the length of first carbon nanotube is 100-300 μm, diameter 5-40nm；Second carbon nanotube
Length be 10-20 μm, diameter 30-100nm.
In carbon nanotube conducting slurry provided in an embodiment of the present invention, a certain amount of first carbon nanotube (content joined
For 0.1-0.5%) and the second carbon nanotube (content 0.1-1%), wherein the first carbon nanotube is that (length is high length-diameter ratio
100-300 μm, diameter 5-40nm), our abbreviation long tubes herein, the second carbon nanotube is that (length is 10-20 μ to low draw ratio
M, diameter 30-100nm), our abbreviation short tubes, are utilized the high conductivity advantage of the first carbon nanotube, again so herein
The polymolecularity advantage of the second carbon nanotube is utilized, finally, not only reduces the viscosity of carbon nanotube conducting slurry, improves carbon
The mobility of nanotube conductive slurry, and the carbon content in carbon nanotube conducting slurry is improved, to further increase carbon
The electric conductivity of nanotube conductive slurry.
Carbon nanotube has excellent electric conductivity, however when carbon nanotube is reunited together, the performance can not be played,
A reticular structure is only formed after carbon nanotube is scattered one by one, competence exertion goes out excellent electric conductivity or it is led
Hot property.However, in actual carbon nanotube dispersion process, especially for the dispersion of the carbon nanotube of high length-diameter ratio, reunion
Carbon nanotube all intactly can't separately be uniformly dispersed (this is perfect ideal state) one by one, and external force is applied
When dispersing them separately to carbon nanotube, more or less there is part carbon nanotube because above-mentioned external force is cut off, moreover, still there is portion
Point carbon nanotube is still reunited together, that is, carbon nanotube of the carbon nanotube of high length-diameter ratio in terms of dispersion with low draw ratio
It compares, dispersion difficulty is much higher.Exist in carbon nanotube dispersion process based on high length-diameter ratio and disperses incomplete defect, in
It is the carbon nanotube (i.e. the second carbon nanotube) that joined low draw ratio in the embodiment of the present invention, the carbon based on the low draw ratio is received
The good dispersibility of mitron, auxiliary form conductive network, supply a gap, finally starch the carbon nanotube conducting of the embodiment of the present invention
Material plays excellent electric conductivity.
The type of carbon nanotube in carbon nanotube conducting slurry can be single-walled carbon nanotube (Single-walled
Carbon nanotubes, SWCNTs) or multi-walled carbon nanotube (Multi-walled Carbon nanotubes, MWCNTs).
In one embodiment, carbon nanotube conducting slurry can further include the carbon black or graphene of 0.1-1%, such as
This can be further improved carbon content, to further increase the electric conductivity of carbon nanotube conducting slurry.Specifically, carbon black or
Graphene content can be equivalent for 0.1%, 0.2%, 0.5%.
In one embodiment, the dispersing agent in carbon nanotube conducting slurry is selected from polyvinylpyrrolidone (PVP), carboxylic
At least one of methylcellulose (CMC), polyethylene glycol (PEG) and polyvinyl alcohol (PVA)；In carbon nanotube conducting slurry
It is 0.1-5.2% that dispersing agent, which contains, is specifically as follows 0.1%, 1.5%, 2%, 5%, 5.2% equivalence.The binder is selected from poly-
At least one of vinylidene (PVDF) and LA system water-base cement, LA system water-base cement are by the single of soap-free emulsion technology synthesis
The aqueous dispersions of copolymer, the adding ingredients such as emulsifier-free, thickener are a kind of impurity cationics without other than lithium ion
Aqueous binder, such as LA133；It is 0.5-4% that binder in carbon nanotube conducting slurry, which contains, be specifically as follows 0.5%,
1%, 1.5%, 2%, 3.5%, 4% is equivalent.The solvent is selected from least one of water and N-Methyl pyrrolidone (NMP).
On the other hand, the embodiment of the invention also provides a kind of preparation methods of carbon nanotube conducting slurry, such as Fig. 1 institute
Show, which includes the following steps:
S01: each ingredient is weighed respectively according to ingredient contained by carbon nanotube conducting slurry of the present invention and its content
Raw material；
S02: first carbon nanotube, second carbon nanotube, the dispersing agent and the solvent are carried out first
Mixed processing obtains the first mixing slurry；
S03: the binder is added in first mixing slurry and carries out the second mixed processing, obtains carbon nanotube conducting
Slurry.
The preparation method of carbon nanotube conducting slurry provided in an embodiment of the present invention is for closing slurry into spy of the embodiment of the present invention
Some carbon nanotube conducting slurries, in the preparation method, first by the first carbon nanotube, the second carbon nanotube, dispersing agent and solvent
The first mixed processing is carried out, binder is then added and carries out the second mixed processing, obtains carbon nanotube conducting slurry.The preparation side
Because joined the first carbon nanotube of a certain amount of high length-diameter ratio and the second carbon nanotube of low draw ratio in method, utilize in this way
The high conductivity advantage of first carbon nanotube, and it is utilized the polymolecularity advantage of the second carbon nanotube.Moreover, because production
The few carbon nanotube manufacture craft all requirements of defect are very high in turn for high length-diameter ratio, and natural cost of manufacture is also got higher therewith,
Relatively, the carbon nanotube cost of manufacture of low draw ratio is very low, therefore, when being used in mixed way two kinds of carbon nanotubes, the cost of manufacture
It can reduce very much.
In above-mentioned steps S01: ingredient contained by carbon nanotube conducting slurry and its content have elaborated above.
In above-mentioned steps S02: by first carbon nanotube, second carbon nanotube, the dispersing agent and described molten
It is pre-dispersed processing that agent, which carries out the first mixed processing,；In one embodiment, the step of first mixed processing includes: using high
Shearing force homogenizer is dispersed, wherein disperses 2-10min with the revolving speed of 2000-10000rpm.Under this condition, pre-dispersed
Better effect.If in prepared carbon nanotube conducting slurry further including the carbon black or graphene of 0.1-1%, this step
In can be added 0.1-1% carbon black or graphene carry out the first mixed processing.
In above-mentioned steps S03: the binder is added, viscosity is adjusted, second mixed processing uses electromagnetic agitation
Device or other instrument agitating modes are dispersed, wherein are generally dispersed with the revolving speed of 100-1500rpm, stirring 20-30min is
It can.
It further, can also include step S04: to the obtained carbon nanotube conducting after above-mentioned steps S03
Slurry further carries out homogenize process with high pressure homogenizer, the carbon nanotube conducting slurry further homogenized.
In above-mentioned steps S04: the carbon nano tube paste that the second mixed processing obtains further is dispersed, homogeneous,
Obtain the carbon nanotube conducting slurry of final high concentration.In one embodiment, high-pressure homogeneous processing is complete in high pressure homogenizer
At.Specifically, the pressure of the high-pressure homogeneous processing is 500-1800bar；The temperature of the high-pressure homogeneous processing is 2-20 DEG C；
The time of the high-pressure homogeneous processing is 4-8h.Within the scope of above-mentioned condition, it can be very good to realize homogeneous, be uniformly dispersed
Electrocondution slurry.
In one embodiment, the preparation method of the carbon nanotube conducting slurry includes the following steps:
It is S1, first that the first carbon nanotube, the second carbon nanotube, carbon black, dispersing agent and solvent is pre-dispersed in dispersion machine；
First length of carbon nanotube: 100-300 μm, diameter: 5-40nm；First carbon nanotube mass content: 0.1-
0.3wt%；
Second length of carbon nanotube: 10-20 μm, diameter: 30-100nm；Second carbon nanotube mass content: 0.2-
1wt%；
Carbon black, mass ratio are as follows: 0.1-0.5wt%；
Dispersing agent can be selected from: PVP, CMC, PEG, PVA etc., mass content are as follows: 0.1-5.2wt%；
Solvent can be selected from: water, NMP etc.；
Using high shear dispersion agent, with revolving speed 2000-10000rpm, disperse 2-10 minutes at normal temperature, obtains preliminary equal
First mixing slurry of even dispersion.
S2, to first mixing slurry, add binder, futher stir, obtain the second mixing slurry.
Binder can be selected from: PVDF, LA series water-base cement etc., mass content are as follows: 0.5-4wt%；
Stirring condition: revolving speed 100-1500rpm；Time 20-30min；Room temperature；To obtain the second mixing slurry.
S3, second mixing slurry dispersed again in high pressure homogenizer, homogeneous, obtains the carbon nanometer of final high concentration
Pipe electrocondution slurry.Detailed process are as follows: with the pressure of 500-1800bar, at a temperature of 2-20 DEG C, homogeneous 4-8h.
In above-mentioned steps, room temperature refers generally to 20-25 DEG C.
Because in carbon nanotube conducting slurry of the invention simultaneously containing a certain amount of high length-diameter ratio the first carbon nanotube and
Second carbon nanotube of low draw ratio not only has the characteristics that low viscosity, but also carbon content is high, and carbon nanotube conducting can be improved
The electric conductivity of slurry, therefore can be advantageously applied in lithium ion battery, such as the anode slurry with preparing lithium ion battery
Material or negative electrode slurry, to prepare battery electrode.
The present invention successively carried out test of many times, and it is further detailed as reference pair invention progress now to lift A partial experiment result
Thin description, is described in detail combined with specific embodiments below.
Embodiment 1
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 2.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 0.5g the second carbon nanotube (length are as follows: 20
μm, diameter are as follows: 30nm), 3gPVP, 444gNMP is added in beaker, by the pre-dispersed 10min of dispersion machine 8000rpm, is added
50gPVDF (10%) solution stirs 5 minutes, and mixed solution is transferred in high pressure homogenizer, and operating pressure 1200bar is arranged,
Continuous dispersion 6 times, is made the electrocondution slurry of 0.4% carbon content.
Embodiment 2
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 1.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 1.5g the second carbon nanotube (length are as follows: 20
μm, diameter are as follows: 30nm), 3gPVP, 444gNMP is added in beaker, by the pre-dispersed 10min of dispersion machine 8000rpm, is added
50gPVDF (10%) solution stirs 5 minutes, and mixed solution is transferred in high pressure homogenizer, and operating pressure 1200bar is arranged,
Continuous dispersion 6 times, is made the electrocondution slurry of 0.4% carbon content.
Embodiment 3
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 0.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 2.5g the second carbon nanotube (length are as follows: 20
μm, diameter are as follows: 30nm), 3gPVP, 444gNMP is added in beaker, by the pre-dispersed 10min of dispersion machine 8000rpm, is added
50gPVDF (10%) solution stirs 5 minutes, and mixed solution is transferred in high pressure homogenizer, and operating pressure 1200bar is arranged,
Continuous dispersion 6 times, is made the electrocondution slurry of 0.4% carbon content.
Embodiment 4
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 2.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 0.5g the second carbon nanotube (length are as follows: 20
μm, diameter are as follows: 30nm), 2.5g graphene, 3gPVP, 441.5gNMP are added in beaker, are divided in advance by dispersion machine 8000rpm
10min is dissipated, 50gPVDF (10%) solution is added and stirs 5 minutes, mixed solution is transferred in high pressure homogenizer, setting operation
Pressure 1200bar, continuous dispersion 6 times, is made the electrocondution slurry of 0.4% carbon content.
Embodiment 5
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 2.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 0.5g the second carbon nanotube (length are as follows: 20
μm, diameter are as follows: 30nm), 2.5g carbon black, 3gPVP, 441.5gNMP are added in beaker, pre-dispersed by dispersion machine 8000rpm
10min is added 50gPVDF (10%) solution and stirs 5 minutes, mixed solution is transferred in high pressure homogenizer, setting operation pressure
Power 1200bar, continuous dispersion 6 times, is made the electrocondution slurry of 0.4% carbon content.
Comparative example 1
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 1g (length are as follows: 200 μm, diameter are as follows: 20nm), 3gPVP, 446gNMP is added in beaker, leads to
The pre-dispersed 10min of dispersion machine 8000rpm is crossed, 50gPVDF (10%) solution is added and stirs 5 minutes, mixed solution is shifted supreme
It presses in homogenizer, operating pressure 1200bar is set, the electrocondution slurry of 0.2% carbon content is made in continuous dispersion 6 times.
Comparative example 2
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The first carbon nanotube of 1.5g (length are as follows: 200 μm, diameter are as follows: 20nm), 3gPVP, 445.5gNMP is added to beaker
In, by the pre-dispersed 10min of dispersion machine 8000rpm, 50gPVDF (10%) solution is added and stirs 5 minutes, mixed solution is shifted
Into high pressure homogenizer, operating pressure 1200bar is set, the electrocondution slurry of 0.3% carbon content is made in continuous dispersion 6 times.
Comparative example 3
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The second carbon nanotube of 15g (length are as follows: 20 μm, diameter are as follows: 30nm), 3gPVP, 432gNMP is added in beaker, leads to
The pre-dispersed 10min of dispersion machine 8000rpm is crossed, 50gPVDF (10%) solution is added and stirs 5 minutes, mixed solution is shifted supreme
It presses in homogenizer, operating pressure 1200bar is set, the electrocondution slurry of 3% carbon content is made in continuous dispersion 6 times.
Comparative example 4
A kind of preparation method of carbon nanotube conducting slurry, includes the following steps:
The second carbon nanotube of 25g (length are as follows: 20 μm, diameter are as follows: 30nm), 3gPVP, 422gNMP is added in beaker, leads to
The pre-dispersed 10min of dispersion machine 8000rpm is crossed, 50gPVDF (10%) solution is added and stirs 5 minutes, mixed solution is shifted supreme
It presses in homogenizer, operating pressure 1200bar is set, the electrocondution slurry of 5% carbon content is made in continuous dispersion 6 times.
Pole piece resistivity measurement is carried out to the electrocondution slurry of above-described embodiment and comparative example, data result is as shown in table 1.
Table 1
From 1 data of table it is found that the opposite carbon nanotube conducting slurry (comparative example 1 and 2) for containing only the first carbon nanotube and
The carbon nanotube conducting slurry (comparative example 3 and 4) of the second carbon nanotube is contained only, simultaneously the first carbon nanometer containing high length-diameter ratio
The electric conductivity of the carbon nanotube conducting slurry (embodiment 1-5) of second carbon nanotube of pipe and low draw ratio is higher, obtained
Pole piece resistivity is lower.Moreover, by addition carbon black or graphene in the electrocondution slurry of the embodiment of the present invention, it can be into one
Step improves electric conductivity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of carbon nanotube conducting slurry, which is characterized in that with the gross mass of the carbon nanotube conducting slurry for 100%
Meter, the carbon nanotube conducting slurry includes the ingredient of following mass percentage:
Wherein, the length of first carbon nanotube is 100-300 μm, diameter 5-40nm；The length of second carbon nanotube
Degree is 10-20 μm, diameter 30-100nm.
2. carbon nanotube conducting slurry as described in claim 1, which is characterized in that in the carbon nanotube conducting slurry, also
Carbon black or graphene including 0.1-1%.
3. carbon nanotube conducting slurry as claimed in claim 1 or 2, which is characterized in that the dispersing agent is selected from polyethylene pyrrole
At least one of pyrrolidone, carboxymethyl cellulose, polyethylene glycol and polyvinyl alcohol.
4. carbon nanotube conducting slurry as claimed in claim 1 or 2, which is characterized in that the binder is selected from polyvinylidene fluoride
At least one of alkene and LA system water-base cement.
5. carbon nanotube conducting slurry as claimed in claim 1 or 2, which is characterized in that the solvent is selected from water and N- methyl
At least one of pyrrolidones.
6. a kind of preparation method of carbon nanotube conducting slurry, which comprises the steps of:
According to ingredient contained by the described in any item carbon nanotube conducting slurries of claim 1-5 and its content weigh respectively it is each at
Divide raw material；
First carbon nanotube, second carbon nanotube, the dispersing agent and the solvent are subjected to the first mixed processing,
Obtain the first mixing slurry；
The binder is added in first mixing slurry and carries out the second mixed processing, obtains carbon nano tube paste.
7. the preparation method of carbon nanotube conducting slurry as claimed in claim 6, which is characterized in that first mixed processing
Dispersed using high shear force homogenizer, wherein 2-10min is dispersed with the revolving speed of 2000-10000rpm.
8. the preparation method of carbon nanotube conducting slurry as claimed in claim 6, which is characterized in that second mixed processing
Dispersed using magnetic stirrer, wherein 20-30min is dispersed with the revolving speed of 100-1500rpm.
9. the preparation method of carbon nanotube conducting slurry as claimed in claim 6, which is characterized in that this method further include:
Homogenize process further is carried out with high pressure homogenizer to the obtained carbon nanotube conducting slurry, is obtained further
Homogenized carbon nanotube conducting slurry.
10. the preparation method of carbon nanotube conducting slurry as claimed in claim 9, which is characterized in that the homogenize process
Pressure be 500-1800bar；And/or
The temperature of the homogenize process is 2-20 DEG C；And/or
The time of the homogenize process is 4-8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684636.5A CN110491546A (en) | 2019-07-26 | 2019-07-26 | Carbon nanotube conducting slurry and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684636.5A CN110491546A (en) | 2019-07-26 | 2019-07-26 | Carbon nanotube conducting slurry and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110491546A true CN110491546A (en) | 2019-11-22 |
Family
ID=68548713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910684636.5A Pending CN110491546A (en) | 2019-07-26 | 2019-07-26 | Carbon nanotube conducting slurry and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110491546A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752372A (en) * | 2019-12-02 | 2020-02-04 | 桑顿新能源科技有限公司 | Conductive paste, electrode plate, preparation method and application thereof |
| CN111129499A (en) * | 2019-12-30 | 2020-05-08 | 宣城研一新能源科技有限公司 | Water-based conductive adhesive for lithium battery and preparation method thereof |
| CN111430061A (en) * | 2020-04-07 | 2020-07-17 | 内蒙古骏成新能源科技有限公司 | Carbon nanotube conductive composite and preparation method thereof |
| CN112018328A (en) * | 2020-09-21 | 2020-12-01 | 珠海冠宇电池股份有限公司 | Silicon-doped negative plate and lithium ion battery comprising same |
| CN113839037A (en) * | 2020-06-24 | 2021-12-24 | 比亚迪股份有限公司 | Conductive agent, electrode paste, electrode sheet and battery |
| CN114039050A (en) * | 2021-11-01 | 2022-02-11 | 哈尔滨万鑫石墨谷科技有限公司 | Carbonized biomass conductive slurry and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420035A (en) * | 2008-05-26 | 2009-04-29 | 深圳市德方纳米科技有限公司 | Preparation of carbon nanotube conductive solution for lithium ionic secondary cell |
| CN103426498A (en) * | 2012-05-17 | 2013-12-04 | 复旦大学 | Carbon nanotube conductive slurry and method for preparing carbon nanotube conductive slurry |
| KR20170117980A (en) * | 2017-10-10 | 2017-10-24 | 주식회사 엘지화학 | Electrode Slurry for Secondary Battery Containing Two Types of Conductive Materials and Secondary Battery Comprising the Same |
| CN107482220A (en) * | 2017-06-23 | 2017-12-15 | 深圳市德方纳米科技股份有限公司 | A kind of lithium ion battery conductive carbon pastes and its preparation method and application |
| CN107706424A (en) * | 2017-09-30 | 2018-02-16 | 深圳市中科纳米科技有限公司 | Carbon nanotube conducting slurry and preparation method thereof and lithium ion battery |
| TW201836974A (en) * | 2017-03-28 | 2018-10-16 | 識驊科技股份有限公司 | Battery positive electrode slurry containing composite carbon nanotube capable of effectively bridging among multiple different positive conductive units of the positive electrode |
| US20190123352A1 (en) * | 2017-10-19 | 2019-04-25 | Samsung Sdi Co., Ltd. | Electrode for rechargeable lithium battery and rechargeable lithium battery including same |
-
2019
- 2019-07-26 CN CN201910684636.5A patent/CN110491546A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420035A (en) * | 2008-05-26 | 2009-04-29 | 深圳市德方纳米科技有限公司 | Preparation of carbon nanotube conductive solution for lithium ionic secondary cell |
| CN103426498A (en) * | 2012-05-17 | 2013-12-04 | 复旦大学 | Carbon nanotube conductive slurry and method for preparing carbon nanotube conductive slurry |
| TW201836974A (en) * | 2017-03-28 | 2018-10-16 | 識驊科技股份有限公司 | Battery positive electrode slurry containing composite carbon nanotube capable of effectively bridging among multiple different positive conductive units of the positive electrode |
| CN107482220A (en) * | 2017-06-23 | 2017-12-15 | 深圳市德方纳米科技股份有限公司 | A kind of lithium ion battery conductive carbon pastes and its preparation method and application |
| CN107706424A (en) * | 2017-09-30 | 2018-02-16 | 深圳市中科纳米科技有限公司 | Carbon nanotube conducting slurry and preparation method thereof and lithium ion battery |
| KR20170117980A (en) * | 2017-10-10 | 2017-10-24 | 주식회사 엘지화학 | Electrode Slurry for Secondary Battery Containing Two Types of Conductive Materials and Secondary Battery Comprising the Same |
| US20190123352A1 (en) * | 2017-10-19 | 2019-04-25 | Samsung Sdi Co., Ltd. | Electrode for rechargeable lithium battery and rechargeable lithium battery including same |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752372A (en) * | 2019-12-02 | 2020-02-04 | 桑顿新能源科技有限公司 | Conductive paste, electrode plate, preparation method and application thereof |
| CN111129499A (en) * | 2019-12-30 | 2020-05-08 | 宣城研一新能源科技有限公司 | Water-based conductive adhesive for lithium battery and preparation method thereof |
| CN111430061A (en) * | 2020-04-07 | 2020-07-17 | 内蒙古骏成新能源科技有限公司 | Carbon nanotube conductive composite and preparation method thereof |
| CN113839037A (en) * | 2020-06-24 | 2021-12-24 | 比亚迪股份有限公司 | Conductive agent, electrode paste, electrode sheet and battery |
| CN113839037B (en) * | 2020-06-24 | 2023-09-05 | 比亚迪股份有限公司 | Conductive agent, electrode slurry, electrode plate and battery |
| CN112018328A (en) * | 2020-09-21 | 2020-12-01 | 珠海冠宇电池股份有限公司 | Silicon-doped negative plate and lithium ion battery comprising same |
| CN112018328B (en) * | 2020-09-21 | 2021-07-06 | 珠海冠宇电池股份有限公司 | Silicon-doped negative plate and lithium ion battery comprising same |
| CN114039050A (en) * | 2021-11-01 | 2022-02-11 | 哈尔滨万鑫石墨谷科技有限公司 | Carbonized biomass conductive slurry and preparation method and application thereof |
| CN114039050B (en) * | 2021-11-01 | 2023-08-29 | 哈尔滨万鑫石墨谷科技有限公司 | Carbonized biomass conductive slurry, and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110491546A (en) | Carbon nanotube conducting slurry and preparation method thereof | |
| CN110473653B (en) | High-carbon-content carbon nanotube conductive slurry and preparation method thereof | |
| CN103937016B (en) | Spraying method for preparing graphene/polymer emulsion composite thin film material | |
| CN107706424B (en) | Carbon nanotube conductive slurry, preparation method thereof and lithium ion battery | |
| CN112331380B (en) | Composite conductive slurry and preparation method and application thereof | |
| CN103739903B (en) | A kind of High-conductivity carbon nanotube/rubber nanocomposite and preparation method thereof | |
| WO2019129228A1 (en) | Electrocondution slurry and preparation method therefor | |
| CN110190282A (en) | Carbon nanotube conducting slurry and its preparation method and application | |
| CN113035407B (en) | Carbon nano tube compound conductive slurry for lithium ion battery and preparation method thereof | |
| JP5604609B2 (en) | Carbon nanotube dispersion and method for producing the dispersion | |
| CN112072103B (en) | High-conductivity carbon conductive slurry and preparation method thereof | |
| CN112803025B (en) | Preparation method of single-walled carbon nanotube conductive slurry, lithium ion battery negative electrode material and preparation method thereof | |
| CN112186140B (en) | Silicon-based active composite conductive slurry applied to silicon-carbon cathode and cathode slurry mixing method | |
| CN105838026B (en) | Graphene dispersion method, graphene dispersion system and its preparation method and application | |
| CN105633409B (en) | A kind of lithium titanate mixes powder pulping process with graphite material cathode | |
| CN101781404A (en) | Method for preparing carbon nanotube static conductive coating on surface of EVA thin film | |
| CN106029564A (en) | High carbon nanotube content fluids | |
| CN112151801A (en) | Lithium ion battery anode slurry and preparation method thereof | |
| Xu et al. | Efficient dispersion of carbon nanotube by synergistic effects of sisal cellulose nano-fiber and graphene oxide | |
| CN105949536A (en) | {0><}0{>Preparation method of high-strength natural rubber (NR)/carbon nano tube (CNT) conductive composite film | |
| CN109384219A (en) | Nano-fluid towards high efficient heat exchanging working medium and preparation method thereof and heat exchange equipment | |
| CN106995213A (en) | A kind of graphene dispersing solution, its preparation method and application | |
| CN109524616A (en) | A kind of lithium ion battery anode glue size and preparation method thereof | |
| CN110957494A (en) | Graphene lithium ion battery conductive agent and preparation method thereof | |
| CN104591125A (en) | Method for dispersing one-dimensional or two-dimensional nanometer material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191122 |
|
| RJ01 | Rejection of invention patent application after publication |