CN107706422A - Composite mortar of graphene and CNT and preparation method thereof, anode sizing agent and its method - Google Patents
Composite mortar of graphene and CNT and preparation method thereof, anode sizing agent and its method Download PDFInfo
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- CN107706422A CN107706422A CN201710574876.0A CN201710574876A CN107706422A CN 107706422 A CN107706422 A CN 107706422A CN 201710574876 A CN201710574876 A CN 201710574876A CN 107706422 A CN107706422 A CN 107706422A
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of graphene and the composite mortar of CNT, for conductive matter using the compound of graphene and CNT, the mass ratio of graphene and CNT contained therein is 3 in the slurry:7‑7:3.The present invention provides graphene/CNT composite mortars and can applied as electrodes conduct agent in lithium ion battery.The graphene that the present invention prepares/CNT composites, it is unstable and be improved with material combination defective tightness for graphene slurry, by adding CNT to prevent graphene from reuniting, and conductive network is more efficiently formed by cooperative effect and improves electrode conductivuty and discharge capacity.
Description
Technical field
The present invention relates to a kind of electrocondution slurry and preparation method thereof, a kind of more particularly to conductive paste for anode
Material and preparation method thereof.
Background technology
Protruded as the day of energy and environment problem shows, the development of electric automobile particularly pure electric automobile is imperative.
At present, can the bottleneck that restrict Development of Electric Vehicles be to develop inexpensive, safe, environment-friendly secondary cell.Lithium-ion electric
Pond is acknowledged as most potential power battery of electric vehicle due to the features such as having high-energy-density and high-specific-power concurrently.It is right
For lithium ion battery, positive plate is the key factor for determining its chemical property, security performance and Costco Wholesale.Lithium from
The positive electrode of sub- battery is generally transition-metal oxide, such as：LiCoO2、LiNiO2、LiMnO2And LiNixCoyMn(1-x-y)
O2Deng, and the phosphate of transition metal, such as LiMPO4(M is Fe or Mn), their electrical conductivity are low, usually semiconductor or absolutely
Edge body, in order to ensure the normal work of lithium ion battery, therefore conductive additive is must be added to during prepared by electrode.
Excellent conductive agent needs to have following feature：First, electrical conductivity is higher, and the material of high conductivity can improve electricity
The migration rate of son；2nd, particle diameter is smaller, and the material of small particle can fill the space of anode material for lithium-ion batteries, make material it
Between contact it is preferable, be easy to the migration of lithium ion；3rd, high-specific surface area, the big material of specific surface area can preferably and positive and negative electrode
Material, it is equally easy to Electolyte-absorptive；4th, it is easily dispersed, is easily dispersed in positive electrode prepares slurry process, can be compared with
Good mixes with positive electrode；5th, high stability, can be stabilized during lithium ion battery discharge and recharge, no
The reaction with electrolyte can occur and influence the cycle performance of battery.Existing commercial conductive agent is based on carbon material, mainly
Including electrically conductive graphite, conductive black and CNT etc., the advantages of above-mentioned conductive agent respectively has itself, but do not possess a kind of excellent
The features described above that conductive agent should possess, can not meet the needs of lithium ion battery conductive agent, therefore, it is necessary to develop new
Conductive agent.
The content of the invention
It is an object of the invention to for current technology defect, there is provided a kind of more excellent graphene of performance and carbon are received
The composite mortar of mitron, the graphene/CNT composite mortars can be applied in lithium ion battery as electrodes conduct agent.The present invention
The graphene prepared/CNT composite mortars, it is unstable and be improved with material combination defective tightness for graphene slurry,
By adding CNT to prevent graphene from reuniting, and conductive network is more efficiently formed by cooperative effect improves electrode and lead
Electrical and discharge capacity.
It is a further object of the present invention to provide more excellent anode sizing agent of a kind of performance and preparation method thereof；
It is yet another object of the invention to provide above-mentioned anode pole piece.
The purpose of the present invention implements by the following technical programs：
A kind of composite mortar of graphene and CNT, conductive matter is using graphene and CNT in the slurry
Compound, the mass ratio of graphene and CNT contained therein is 3:7-7:3.
As the preferred scheme of the composite mortar of above-mentioned graphene and CNT, contain 1.5wt%- in the slurry
3.5wt% CNT, 1.5wt%-3.5wt% graphene, 0.1wt%-1.5wt% dispersion stabilizer, surplus are
Solvent.
As the further preferred scheme of the composite mortar of above-mentioned graphene and CNT, contain in the slurry
2.5wt% CNT, 2.5wt% graphene, 0.2wt% dispersion stabilizer, surplus are solvent.
According to an aspect of the present invention, the solvent uses 1-METHYLPYRROLIDONE.
According to an aspect of the present invention, the dispersion stabilizer is PVP, polyvinyl alcohol, polypropylene
One or both of acid esters or APEO mix, preferably PVP and/or polyacrylate.
According to an aspect of the present invention, the BET 200-500m of the graphene2, preferably 200-250m2；Preferably, institute
The number of plies for stating graphene is less than or equal to 10 layers.
According to an aspect of the present invention, described CNT is caliber 2-20nm, the single wall or more of 1-20 μm of pipe range
Wall carbon nano tube；Preferably, described CNT is caliber 10nm, the single-walled carbon nanotube of 12 μm of pipe range.
According to an aspect of the present invention, viscosity is 5000-8000mPa.s when the slurry is stood.
Above-mentioned graphene and the preparation method of the composite mortar of CNT,
Prepare 3wt%-7wt% graphene slurry；
Prepare 3wt%-7wt% carbon nano tube paste；
Graphene slurry and carbon nano tube paste are pressed 1:1 mass ratio mixing, you can.
According to an aspect of the present invention, the graphene slurry is identical with the solvent of carbon nano tube paste, dispersant hundred
Divide more identical than content.
Preferably, the preparation method of the graphene slurry is：Graphene powder is added into the solvent dissolved with dispersant,
1-3h is sanded under 8000-12000RPM rotating speed；
Preferably, the preparation method of the carbon nano tube paste is：Carbon nanometer is added into the solvent dissolved with dispersant
Manage, 1-3h is sanded under 8000-12000RPM rotating speed.
A kind of preparation method of anode sizing agent, PVDF breasts are added into the composite mortar of above-mentioned graphene and CNT
Liquid and positive electrode, with 100-300RPM rotating speed, ball milling 1-3h.
Anode sizing agent made from the above method, comprising in composition, comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.5wt%,
Graphene 0.5wt%,
Dispersant 0.02wt%, and
PVDF 3wt%；
Or comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.3wt%,
Graphene 0.7wt%,
Dispersant 0.02wt%, and
PVDF 3wt%；
Or comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.7wt%,
Graphene 0.3wt%,
Dispersant 0.02wt%, and
PVDF 3wt%.
A kind of electrode slice, the anode sizing agent obtained using the above method are prepared.
The concept of the positive electrode occurred in the present invention, refer to the positive electrode used in existing lithium ion battery, including
Ternary material, such as：LiFePO4 LiFePO4, lithium and cobalt oxides LiCoO2, lithium nickelate LiNiO2, lithium manganese oxide LiMnO2、
Manganese nickel cobalt composite oxides LiMnxNiyCo1-x-yO2, lithium-barium oxide LiV2O4、LiVMO4(M=Ni, Co) or Li1+xV3O8, etc.
Deng, and do not terminate in the species enumerated.
The present invention provides graphene/CNT composite mortars and can applied as electrodes conduct agent in lithium ion battery.The present invention
The graphene prepared/CNT composites, it is unstable and be improved with material combination defective tightness for graphene slurry,
By adding CNT to prevent graphene from reuniting, in addition, node of the graphene filling with serving as conductive network among positive electrode,
CNT links positive electrode particle and graphene, serves as the branch line of conductive network, is more efficiently formed by both cooperative effects
Conductive network, so as to improve electrode conductivuty and discharge capacity.And the electrocondution slurry preparation method of the present invention is simple, it is adapted to big
Technical scale metaplasia is produced.Meanwhile graphene cost is lower than CNT, the application cost of CNT greatly reduces.This
The anode sizing agent provided is provided, electrocondution slurry is compounded using CNT and graphene, in manufactured pole piece, by graphene fill with just
The node of conductive network, CNT link positive electrode particles and graphene are served as among the material of pole, serves as the branch line of conductive network,
Only need seldom addition just to make to form efficient conductive network structure between positive electrode, CNT, graphene, improve
The discharge capacity and high rate performance of lithium ion battery.
Shown in Figure 2, the discharge capacity of combined conductive agent sample is higher than simple addition CNT or graphite under equal addition
The sample of alkene, the discharge capacity first of electrode slice of the composite mortar of the present invention with being fabricated to after the compounding of positive electrode is lower, phase
It is higher with multiplying power under discharge capacity, wherein, work as CNT:GN is 5：When 5, performance is optimal.
Dispersant in composite mortar of the present invention is that (2-5V) is stable in the range of normal charging/discharging voltage；, positive pole slurry
In the preparation of material, using ball milling mixing positive electrode and composite mortar so that positive electrode Surface coating has graphene in pole piece
Microplate and CNT.The SEM pictures of the anode sizing agent of compounding shown in Figure 1.It can be seen that graphene and carbon are received
The combined conductive agent of mitron is intact in positive electrode Surface coating, forms good conductive network.
Brief description of the drawings
Fig. 1 is the SEM pictures of anode sizing agent of the present invention；
Fig. 2 is the button cell different multiplying discharge capacity of the cell of the different conductive agent materials of addition identical.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
It is conductive in the slurry An embodiment provides a kind of graphene and the composite mortar of CNT
Matter is compound using graphene and CNT, and the mass ratio of graphene and CNT contained therein is 3:7-7:3, such as：
3:7、4:7、5:7、6:7、7:7、7:6、7:5、7:4、7:3, etc..
The one side of the present embodiment, the CNT containing 1.5wt%-3.5wt%, 1.5wt%- in the slurry
3.5wt% graphene, 0.1wt%-1.5wt% dispersion stabilizer, surplus are solvent.Such as：It is contained in the slurry
CNT 1.5wt%, 1.8wt%, 2wt%, 2.1wt%, 2.3wt%, 2.5wt%, 2.7wt%, 3wt%, 3.2wt%,
3.5wt%, etc.；Institute graphene-containing 1.5wt%, 1.8wt% in the slurry, 2wt%, 2.1wt%, 2.3wt%, 2.5wt%,
2.7wt%, 3wt%, 3.2wt%, 3.5wt%, etc.；Contained dispersion stabilizer 0.1wt%, 0.2wt% in the slurry,
0.3wt%, 0.5wt%, 0.6wt%, 0.8wt%, 1wt%, 1.2wt%, 1.3wt%, 1.5wt%, etc..As optimal group
Close, the CNT containing 2.5wt%, 2.5wt% graphene, 0.2wt% dispersion stabilizer in the slurry, surplus is
Solvent.
The one side of the present embodiment, the solvent use 1-METHYLPYRROLIDONE.
The one side of the present embodiment, the dispersion stabilizer are PVP, polyvinyl alcohol, polyacrylic acid
One or both of ester or APEO mix, preferably PVP and/or polyacrylate.
The one side of the present embodiment, the BET 200-500m of the graphene2, such as：200m2、210m2、220m2、
230m2、240m2、250m2、270m2、290m2、300m2、310m2、330m2、345m2、350m2、365m2、380m2、400m2、
450m2、475m2、500m2, etc.；It is preferred that 200-250m2, such as：200m2、205m2、210m2、220m2、222m2、230m2、
236m2、240m2、243m2、250m2, etc..
The one side of the present embodiment, the number of plies of the graphene are less than or equal to 10 layers, such as：1 layer graphene, 2 layers of stone
Black alkene, 5 layer graphenes, 7 layer graphenes, 10 layer graphenes, etc..
The one side of the present embodiment, described CNT are caliber 2-20nm, the single wall of 1-20 μm of pipe range or more walls
CNT；Such as：Caliber 2nm, 20 μm of pipe range single-walled carbon nanotube, caliber 20nm, the multi-walled carbon nanotube of 1 μm of pipe range,
Caliber 5nm, 10 μm of pipe range single-walled carbon nanotube, caliber 12nm, the single-walled carbon nanotube of 7 μm of pipe range, caliber 15nm, pipe range 10
μm multi-walled carbon nanotube, etc.；Preferably, described CNT is caliber 10nm, the single-walled carbon nanotube of 12 μm of pipe range.
The one side of the present embodiment, viscosity is 5000-8000mPa.s when the slurry is stood.
An alternative embodiment of the invention, there is provided above-mentioned graphene and the preparation side of the composite mortar of CNT
Method,
Prepare 3wt%-7wt% graphene slurry；
Prepare 3wt%-7wt% carbon nano tube paste；
Graphene slurry and carbon nano tube paste are pressed 1:1 mass ratio mixing, you can.
According to an aspect of the present invention, the graphene slurry is identical with the solvent of carbon nano tube paste, dispersant hundred
Divide more identical than content.
The one side of the present embodiment, the preparation method of the graphene slurry are：Into the solvent dissolved with dispersant
Graphene powder is added, 1-3h is sanded under 8000-12000RPM rotating speed.Such as：Under 8000RPM rotating speed be sanded 3h,
Under 12000RPM rotating speed be sanded 1h, 10000RPM rotating speed under be sanded 2h, 9000RPM rotating speed under be sanded 1.5h,
2.5h is sanded under 11000RPM rotating speed, etc..
The one side of the present embodiment, the preparation method of the carbon nano tube paste are：To the solvent dissolved with dispersant
Middle addition CNT, 1-3h is sanded under 8000-12000RPM rotating speed.Such as：Under 8000RPM rotating speed be sanded 3h,
Under 12000RPM rotating speed be sanded 1h, 10000RPM rotating speed under be sanded 2h, 9000RPM rotating speed under be sanded 1.5h,
2.5h is sanded under 11000RPM rotating speed, etc..
An alternative embodiment of the invention, there is provided a kind of preparation method of anode sizing agent, to above-mentioned graphene and carbon
PVDF emulsions and positive electrode are added in the composite mortar of nanotube, with 100-300RPM rotating speed, ball milling 1-3h.Such as：With
100RPM rotating speed, ball milling 3h；With 300RPM rotating speed, ball milling 1h；With 200RPM rotating speed, ball milling 2h；With turning for 150RPM
Speed, ball milling 1.5h；With 200RPM rotating speed, ball milling 2.5h；Deng.
An alternative embodiment of the invention, there is provided anode sizing agent made from the above method, comprising in composition, comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.5wt%,
Graphene 0.5wt%,
Dispersant 0.02wt%, and
PVDF 3wt%；
Or comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.3wt%,
Graphene 0.7wt%,
Dispersant 0.02wt%, and
PVDF 3wt%；
Or comprising：
Lithium nickel cobalt manganese oxide 95.98wt%,
Single wall or multi-walled carbon nanotube 0.7wt%,
Graphene 0.3wt%,
Dispersant 0.02wt%, and
PVDF 3wt%.
Another embodiment of the present invention, there is provided a kind of electrode slice, using the anode sizing agent preparation that the above method obtains
Into.
Embodiment 1：
940 grams of 1-METHYLPYRROLIDONEs are weighed, add 10 grams of PVPs, stirring and dissolving；
Solution is divided into 2 parts of identical, portion adds 25 grams of multi-walled carbon nanotubes, its pipe range<It is 10 μm, 10000RPM, husky
Mill 1h obtains slurry 1；Portion adds 25 grams of graphenes, and its specific surface area is about 225m2/g；10000RPM, sand mill 1h are starched
Material 2；
Slurry 1 is compounded after being mixed with slurry 2 by ball milling (200RPM, ball milling 2h) and lithium nickel cobalt manganese oxide, compound
In the mass percent of each composition be：Lithium nickel cobalt manganese oxide: multi-walled carbon nanotube: graphene: dispersant: PVDF=
95.98%: 0.5%: 0.5%: 0.02%: 3%, make button electricity, test battery performance.(join with pure nano-carbon tube slurry simultaneously
See comparative example) contrast.Fig. 1 is compound SEM photograph, and button cell different multiplying battery performance is as shown in Figure 2.
Embodiment 2：
940 grams of 1-METHYLPYRROLIDONEs are weighed, add 10 grams of PVPs, stirring and dissolving；
Solution is divided into 2 parts of identical, portion adds 15 grams of multi-walled carbon nanotubes, its pipe range<It is 10 μm, 10000RPM, husky
Mill 1h obtains slurry 1；Portion adds 35 grams of graphenes, and its specific surface area is about 225m2/g；10000RPM, sand mill 1h are starched
Material 2；
The slurry that slurry 1 obtains after being mixed with slurry 2 is answered by ball milling (100RPM, ball milling 3h) with lithium nickel cobalt manganese oxide
Match somebody with somebody, the mass percent of each composition is in compound：Lithium nickel cobalt manganese oxide: multi-walled carbon nanotube: graphene: dispersant:
PVDF=95.98%: 0.3%: 0.7%: 0.02%: 3%, make button electricity, test battery performance.Starched simultaneously with pure nano-carbon tube
Material contrasts (referring to comparative example).Button cell different multiplying battery performance is as shown in Figure 2.
Embodiment 3：
940 grams of 1-METHYLPYRROLIDONEs are weighed, add 10 grams of PVPs, stirring and dissolving；
Solution is divided into 2 parts of identical, portion adds 35 grams of multi-walled carbon nanotubes, its pipe range<It is 10 μm, 10000RPM, husky
Mill 1h obtains slurry 1；Portion adds 15 grams of graphenes, and its specific surface area is about 400m2/g；10000RPM, sand mill 2h are starched
Material 2；
The slurry that slurry 1 obtains after being mixed with slurry 2 is answered by ball milling (300RPM, ball milling 1h) with lithium nickel cobalt manganese oxide
Match somebody with somebody, the mass percent of each composition is in compound：Lithium nickel cobalt manganese oxide: multi-walled carbon nanotube: graphene: dispersant:
PVDF=95.98%: 0.7%: 0.3%: 0.02%: 3%, make button electricity, test battery performance.Starched simultaneously with pure nano-carbon tube
Material contrasts (referring to comparative example).Button cell different multiplying battery performance is as shown in Figure 2.
Embodiment 4：
940 grams of 1-METHYLPYRROLIDONEs are weighed, add 10 grams of PVPs, stirring and dissolving；
Solution is divided into 2 parts of identical, portion adds 35 grams of multi-walled carbon nanotubes, its pipe range<10 μm, 8000RPM, sand mill
3h obtains slurry 1；Portion adds 15 grams of graphenes, and its specific surface area is about 400m2/g；12000RPM, sand mill 1h obtain slurry
2；
The slurry that slurry 1 obtains after being mixed with slurry 2 is answered by ball milling (150RPM, ball milling 2h) with lithium nickel cobalt manganese oxide
Match somebody with somebody, the mass percent of each composition is in compound：Lithium nickel cobalt manganese oxide: multi-walled carbon nanotube: graphene: dispersant:
PVDF=95.98%: 0.7%: 0.3%: 0.02%: 3%.
Embodiment 5：
940 grams of 1-METHYLPYRROLIDONEs are weighed, add 10 grams of PVPs, stirring and dissolving；
Solution is divided into 2 parts of identical, portion adds 35 grams of multi-walled carbon nanotubes, its pipe range<10 μm, 1200RPM, sand mill
3h obtains slurry 1；Portion adds 15 grams of graphenes, and its specific surface area is about 400m2/g；8000RPM, sand mill 1h obtain slurry 2；
The slurry that slurry 1 obtains after being mixed with slurry 2 is answered by ball milling (100RPM, ball milling 1h) with lithium nickel cobalt manganese oxide
Match somebody with somebody, the mass percent of each composition is in compound：Lithium nickel cobalt manganese oxide: multi-walled carbon nanotube: graphene: dispersant:
PVDF=95.98%: 0.7%: 0.3%: 0.02%: 3%.
Comparative example：Pure nano-carbon tube slurry, i.e., the mass percent of each composition are：Lithium nickel cobalt manganese oxide: CNT: scattered
Agent: PVDF=95.98%: 1%: 0.02%: 3%.
Claims (12)
- A kind of 1. composite mortar of graphene and CNT, it is characterised in that：In the slurry conductive matter using graphene and CNT it is compound, the mass ratio of graphene and CNT contained therein is 3:7-7:3.
- 2. the composite mortar of graphene according to claim 1 and CNT, it is characterised in that：Contain 1.5wt%- 3.5wt% CNT, 1.5wt%-3.5wt% graphene, 0.1wt%-1.5wt% dispersion stabilizer, surplus are Solvent；Preferably, the CNT containing 2.5wt%, 2.5wt% graphene, 0.2wt% stably dispersing in the slurry Agent, surplus are solvent.
- 3. the composite mortar of graphene according to claim 1 or 2 and CNT, it is characterised in that：The solvent is adopted Use 1-METHYLPYRROLIDONE.
- 4. the composite mortar of graphene according to claim 1 or 2 and CNT, it is characterised in that：It is described scattered steady Agent is determined using the mixing of one or both of PVP, polyvinyl alcohol, polyacrylate or APEO, it is excellent Select PVP and/or polyacrylate.
- 5. the composite mortar of graphene according to claim 1 or 2 and CNT, it is characterised in that：The graphene BET 200-500m2, preferably 200-250m2；Preferably, the number of plies of the graphene is less than or equal to 10 layers.
- 6. the composite mortar of graphene according to claim 1 or 2 and CNT, it is characterised in that：Described carbon is received Mitron is caliber 2-20nm, the single wall or multi-walled carbon nanotube of 1-20 μm of pipe range；Preferably, described CNT is caliber 10nm, 12 μm of pipe range single-walled carbon nanotube.
- 7. the composite mortar of graphene according to claim 1 or 2 and CNT, it is characterised in that：The slurry is quiet Viscosity is 5000-8000mPa.s when putting.
- 8. the preparation method of the composite mortar of graphene and CNT according to claim any one of 1-7, its feature It is：Prepare 3wt%-7wt% graphene slurry；Prepare 3wt%-7wt% carbon nano tube paste；Graphene slurry and carbon nano tube paste are pressed 1:1 mass ratio mixing, you can.
- 9. the preparation method of the composite mortar of graphene according to claim 8 and CNT, it is characterised in that：It is described Graphene slurry is identical with the solvent of carbon nano tube paste, dispersant degree is identical；Preferably, the preparation method of the graphene slurry is：Graphene powder is added into the solvent dissolved with dispersant, 1-3h is sanded under 8000-12000RPM rotating speed；Preferably, the preparation method of the carbon nano tube paste is：CNT is added into the solvent dissolved with dispersant, 1-3h is sanded under 8000-12000RPM rotating speed.
- A kind of 10. preparation method of anode sizing agent, it is characterised in that：To the graphene and carbon described in claim any one of 1-7 PVDF emulsions and positive electrode are added in the composite mortar of nanotube, with 100-300RPM rotating speed, ball milling 1-3h.
- 11. anode sizing agent made from method according to claim 10, it is characterised in that：Comprising：Lithium nickel cobalt manganese oxide 95.98wt%,Single wall or multi-walled carbon nanotube 0.5wt%,Graphene 0.5wt%,Dispersant 0.02wt%, andPVDF 3wt%；Or comprising：Lithium nickel cobalt manganese oxide 95.98wt%,Single wall or multi-walled carbon nanotube 0.3wt%,Graphene 0.7wt%,Dispersant 0.02wt%, andPVDF 3wt%；Or comprising：Lithium nickel cobalt manganese oxide 95.98wt%,Single wall or multi-walled carbon nanotube 0.7wt%,Graphene 0.3wt%,Dispersant 0.02wt%, andPVDF 3wt%.
- A kind of 12. electrode slice, it is characterised in that：The anode sizing agent obtained using claim 11 methods described is prepared.
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| CN110518248A (en) * | 2019-09-02 | 2019-11-29 | 昂星新型碳材料常州有限公司 | A kind of lithium battery electrocondution slurry and preparation method thereof |
| CN110600742A (en) * | 2019-09-12 | 2019-12-20 | 中国航发北京航空材料研究院 | Preparation method and application of graphene conductive slurry |
| CN112582095A (en) * | 2019-09-30 | 2021-03-30 | 苏州晶银新材料股份有限公司 | Conductive paste and solar cell containing same |
| CN113906596A (en) * | 2019-10-04 | 2022-01-07 | 株式会社Lg新能源 | Electrode and secondary battery including the same |
| CN111129470A (en) * | 2019-12-31 | 2020-05-08 | 哈尔滨万鑫石墨谷科技有限公司 | High-solid-content carbon nanotube graphene composite conductive slurry and preparation method thereof |
| CN111129500A (en) * | 2019-12-31 | 2020-05-08 | 哈尔滨万鑫石墨谷科技有限公司 | Preparation method of aqueous composite carbon nanotube conductive slurry |
| CN111162262A (en) * | 2020-01-17 | 2020-05-15 | 广东墨睿科技有限公司 | Preparation method of high-rate lithium ion battery positive electrode slurry |
| CN111293311A (en) * | 2020-02-20 | 2020-06-16 | 北京辉腾格勒石墨烯科技有限公司 | Conductive agent slurry, preparation method of conductive agent slurry and battery positive electrode slurry |
| CN111525137A (en) * | 2020-06-03 | 2020-08-11 | 湖北亿纬动力有限公司 | Positive electrode slurry and application thereof in battery |
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