CN105261760B - Lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion battery - Google Patents
Lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion battery Download PDFInfo
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
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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
- H01M10/04—Construction or manufacture in general
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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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- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
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- H01M4/66—Selection of materials
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- 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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- 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
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Abstract
The present invention relates to a kind of lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion battery, belong to technical field of lithium ion.The lithium ion battery aqueous positive-pole composite current collector of the present invention, is made using the preparation method included the following steps：Binding agent is added in solvent, is uniformly mixed, obtains binder solution；The mass ratio of the binding agent and solvent is 1:10‑30；Conductive agent is added into obtained binder solution, is uniformly mixed, grinding emulsification, obtains electrocondution slurry；The mass ratio of the conductive agent and binding agent is 1 99:1；Obtained electrocondution slurry is coated in plus plate current-collecting body surface, it is dry, to obtain the final product.The lithium ion battery aqueous positive-pole composite current collector of the present invention substantially improves the problem of aqueous positive-pole piece pliability is poor, while also improves coating adhesion, reduces the internal resistance of cell, improves the big multiplying power discharging property and cycle performance of battery.
Description
Technical field
The present invention relates to a kind of lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion
Battery, belongs to technical field of lithium ion.
Background technology
Lithium ion battery has operating voltage height, energy density is big, have extended cycle life, self discharge is small, memory-less effect, ring
The features such as border is friendly, becomes the ideal source in the fields such as communication, electric tool, electric vehicle, space flight and aviation at present.
The manufacturing process of the pole piece of lithium ion battery is that first binding agent and active material, conductive agent are bonded and be configured to properly
Pole piece is made in the slurry of viscosity, the process such as then filtered, coating, dry.Pole piece is divided into positive plate and negative plate, according to bonding
Agent and the physicochemical characteristics of active material, at present based lithium-ion battery positive plate generally use fluoropolymer such as Kynoar conduct
Binding agent, which needs substantial amounts of organic solvent in use, such as N- methyl pyrrolidones
(NMP), dimethylformamide (DMF), dimethyl sulfoxide (DMSO) (DMSO) etc., since organic solvent easily causes environmental pollution, and it is right
Operator's health damages, therefore needs to increase cost input to recycle organic solvent, at the same time in drying process is coated with
The price of fluoropolymer solvents type binding agent is of a relatively high, and production technology is relative complex, it is impossible to meets that lithium ion battery is quick
The demand of development.
In order to overcome drawbacks described above, people have researched and developed aqueous positive-pole binder system, and are applied to positive plate
Making, such as the Chinese invention patent of Publication No. CN1328102A, to disclose a kind of electrode material of secondary lithium ion battery water-based
Adhesive, the Chinese invention patent of Publication No. CN1328104A disclose a kind of water adhesive of lithium ion battery preparation side
Method.But the aqueous positive-pole piece pliability for using above-mentioned aqueous binder to prepare is poor, coating adhesion is low, and the internal resistance of cell is big, greatly
Multiplying power discharging energy is relatively low, and cycle life is shorter, seriously limits the practical application of the lithium ion battery using aqueous positive-pole piece.
Chinese invention patent application that application publication number is CN103972471A (data of publication of application for 2014 on August 6)
A kind of positive plate of big multiplying power ferric phosphate lithium ion battery and preparation method thereof is disclosed, and specifically discloses a kind of big multiplying power phosphorus
The anode pole piece of sour iron lithium ion battery, its collector include aluminium foil and the conductive layer that prints thereon, the conductive layer include carbon black,
Kynoar or carbon black, Kynoar-hexafluoropropylene copolymer.But the pliability of the positive plate is poor, subsequently adding
It is cracked that pole piece is easy to cause during work.
The content of the invention
It is an object of the invention to provide one kind can improve the flexible lithium ion battery aqueous positive-pole Composite Set of pole piece
Fluid.It is a kind of using positive plate of above-mentioned composite current collector and preparation method thereof the present invention also aims to provide, use this
The lithium ion battery of positive plate.
In order to realize the above object the technical solution of the lithium ion battery aqueous positive-pole composite current collector of the present invention is as follows：
A kind of lithium ion battery aqueous positive-pole composite current collector, is made using the preparation method included the following steps：
1) binding agent is added in solvent, is uniformly mixed, obtains binder solution；The mass ratio of the binding agent and solvent is
1:10-30；
2) conductive agent is added in obtained binder solution into step 1), be uniformly mixed, grinding emulsification, obtains conductive paste
Material；The mass ratio of the conductive agent and binding agent is 1-99:1；
3) obtained electrocondution slurry in step 2) is coated in plus plate current-collecting body surface, drying forms conductive coating, to obtain the final product.
The present invention lithium ion battery aqueous positive-pole composite current collector be made using the above method, substantially improve it is water-based just
The problem of pole piece pliability is poor, while coating adhesion is also improved, the internal resistance of cell is reduced, improves the big multiplying power of battery
Discharge performance and cycle performance.
The conductive agent is Super P, the one or more in KS-6, carbon fiber, carbon nanotubes, graphene.
The solvent is 1-methyl-2-pyrrolidinone or water.
The plus plate current-collecting body is collector of the prior art, generally aluminium foil, and the thickness of aluminium foil is 10-25 μm.
Dry temperature is determined depending on the solvent species used in step 1) in the step 3), generally, drying temperature is
60-140℃。
In order to improve the efficiency of grinding in step 2), while the granularity uniformity of slurry is not destroyed again, grinding in step 2)
The grinding rate of emulsification is 800-2000rpm, and preferably rotating speed is 1000-1500rpm, and grinding emulsification uses ceramic grinding ball,
The particle diameter of ball is 0.1-5mm, preferable particle size 0.4-1mm.Grind emulsification time using by slurry be ground to viscosity stabilization as
Preferably, generally, grinding emulsification times are not less than 1h.
In order to improve the uniformity of electrocondution slurry, in the step 2) after grinding emulsifies, de-bubble, sieving processing are carried out.
The slurry after grinding emulsification is specially set to cross 200~300 mesh after keeping at least 8h under the vacuum state no more than -0.08MPa
Sieve.The solid content of the electrocondution slurry is preferably 10~30wt%, and viscosity is preferably 20~500mPas.
Coating can use coating method commonly used in the prior art to carry out in the step 3), as intaglio printing mode applies
Cover.
The surface density of the conductive coating is 0.1-10g/m2。
Binding agent in the step 1) is polyvinylidene fluoride (PVDF), polyvinyl alcohol, polyurethane, carboxymethyl cellulose
Sodium (CMC), butadiene-styrene rubber (SBR), polyacrylate, polyacrylonitrile, polyacrylamide, ethylene-vinyl acetate copolymer emulsion
In one or more.
The technical solution of the positive plate of the present invention is as follows：
A kind of positive plate, including above-mentioned lithium ion battery aqueous positive-pole composite current collector and coated in the lithium-ion electric
The positive active material on pond aqueous positive-pole composite current collector surface, the positive active material by following percentage by weight component
Composition：Positive electrode 90%-98%, conductive agent 0.5%-8%, positive electrode binder 1.5%-8%.
The positive electrode binder is polyvinyl alcohol, sodium carboxymethylcellulose (CMC), butadiene-styrene rubber (SBR), polyacrylic acid
Ester, ethylene-vinyl acetate copolymer emulsion, nitrile-acrylamide-acrylic acid lonitrile copolymer, acrylic acid-acrylamide copolymer, propylene
One or both of acid-nitrile-acrylamide-acrylic acid lonitrile copolymer.
The conductive agent is Super P, the one or more in KS-6, carbon fiber, carbon nanotubes, graphene.
The technical solution of the preparation method of the positive plate of the present invention is as follows：
The preparation method of above-mentioned positive plate, includes the following steps：Positive electrode binder is uniformly mixed with water, adds conduction
Agent, adds positive electrode after mixing, is uniformly mixed to obtain anode sizing agent, anode sizing agent is coated in the lithium-ion electric water
Property cathode composite current collector surface, it is dry, to obtain the final product；The mass ratio of the positive electrode binder and water is 1:20-50.
The anode sizing agent is through toning viscosity, de-bubble, filtration treatment.Specially make anode sizing agent no more than -0.08MPa
Vacuum state under keep crossing 160 mesh sieve nets after at least 12h.The solid content of the anode sizing agent is 40-70%, and viscosity is
4000-7000mPa·s。
It is described to be applied to extrusion coated.
The technical solution of the lithium ion battery of the present invention is as follows：
A kind of lithium ion battery, uses above-mentioned positive plate.
The lithium ion battery of the present invention includes battery container, battery core and electrolyte, and the battery core and electrolyte are sealed in electricity
In the housing of pond, the battery core includes cathode, anode and the membrane between positive and negative anodes.
Pole piece pliability made from the lithium ion battery aqueous positive-pole composite current collector of the present invention is preferable, and adhesive force is also much
More than pole piece of the prior art, 14.5-16.4N/m is reached, surface resistance is less than the surface resistance of pole piece of the prior art, is
0.06-0.09Ω/mm2, the lithium ion battery internal resistance using above-mentioned collector is smaller, and high rate performance and cycle performance are obtained for
Increase substantially.
Brief description of the drawings
Fig. 1 is the structure diagram of positive plate in the embodiment of the present invention 1；
Fig. 2 is the AC internal Resistance normal distribution of 1-3 of the embodiment of the present invention and the lithium ion battery in comparative example；
Fig. 3 is the DC internal resistance change curve of 1-3 of the embodiment of the present invention and the lithium ion battery in comparative example；
Fig. 4 is the multiplying power discharging property curve map of 1-3 of the embodiment of the present invention and the lithium ion battery in comparative example；
Fig. 5 is the cyclic curve figure of 1-3 of the embodiment of the present invention and the lithium ion battery in comparative example.
Embodiment
Technical scheme is further detailed with reference to specific embodiment.
Embodiment 1
The lithium ion battery aqueous positive-pole composite current collector of the present embodiment, using the preparation method system included the following steps
：
1) 1kg binding agents polyvinylidene fluoride (PVDF) is added in 20kg solvent N-methyl pyrilidones, is uniformly mixed,
Obtain binder solution；
2) 9kg conductive agent Super P are added in obtained binder solution into step 1), are uniformly mixed, using 0.4mm
With the rotating speed grinding emulsification 2h of 1000rpm, de-bubble processing 8h, crosses 200 mesh sieve nets, obtains electrocondution slurry the grinding ball of particle diameter；
3) obtained electrocondution slurry in step 2) is coated uniformly on the two of plus plate current-collecting body aluminium foil using intaglio press
A surface, the thickness of aluminium foil is 20 μm, and coating surface density is 2g/m2, it is dry at 120 DEG C, to obtain the final product.
As shown in Figure 1, the positive plate of the present embodiment includes above-mentioned lithium ion battery aqueous positive-pole composite current collector and painting
The positive active material 3 on described two surfaces of lithium ion battery aqueous positive-pole composite current collector is overlayed on, lithium ion battery is water-based
Cathode composite current collector includes collector aluminium, 1 and the conductive coating 2 coated in two surfaces of aluminium foil, positive active material by
The component composition of following percentage by weight：LiFePO4 95%, Super P 2%, nitrile-acrylamide-acrylic acid lonitrile copolymer 2%, carboxylic
Sodium carboxymethylcellulose pyce 1%.
The preparation method of above-mentioned positive plate includes the following steps：42g sodium carboxymethylcelluloses are dissolved in 1500g water,
600g nitrile-acrylamide-acrylic acid lonitrile copolymers are being added, uniformly after mixing, 126gSuper P is being added, uniformly after mixing, adds
4000g LiFePO4s, uniformly mixing, adjusting viscosity is 5000mPas, and anode sizing agent, gained cathode are made after de-bubble is filtered
The solid content of slurry is 50.8%, and anode sizing agent is coated uniformly on above-mentioned lithium ion battery aqueous positive-pole using extrusion coating machine
On composite current collector, up to positive plate.
The lithium ion battery of the present embodiment, including battery container, battery core and electrolyte, battery core and electrolyte are sealed in battery
In housing, battery core includes cathode, anode and the membrane between positive and negative anodes, wherein just extremely above-mentioned positive plate, anode are
Graphite cathode of the prior art, membrane use PP bilayer microporous barriers.
Battery core is made using lamination in the lithium ion battery of the present embodiment, and is made 5Ah's according to method of the prior art
Soft bag lithium ionic cell.
Embodiment 2
The lithium ion battery aqueous positive-pole composite current collector of the present embodiment, using the preparation method system included the following steps
：
1) 200g binding agents sodium carboxymethylcellulose (CMC) is added in 15kg solvent deionized waters, be uniformly mixed, then added
Enter 1.4kg polyvinyl alcohol, uniformly mixing, obtains binder solution；
2) 2.4kg conductive agent Super P are added in obtained binder solution into step 1), are uniformly mixed, are used
With the rotating speed grinding emulsification 2h of 1000rpm, de-bubble processing 8h, crosses 200 mesh sieve nets, obtains conductive paste the grinding ball of 0.6mm particle diameters
Material；
3) obtained electrocondution slurry in step 2) is coated uniformly on the two of plus plate current-collecting body aluminium foil using intaglio press
A surface, the thickness of aluminium foil is 10 μm, and coating surface density is 1g/m2, it is dry at 70 DEG C, to obtain the final product.
The positive plate of the present embodiment includes above-mentioned lithium ion battery aqueous positive-pole composite current collector and coated in the lithium
Positive active material on two surfaces of ion battery aqueous positive-pole composite current collector, positive active material is by following weight percent
The component composition of ratio：LiFePO4 95%, Super P 2%, acrylic acid-acrylamide-acrylonitrile copolymer 3%.
The preparation method of above-mentioned positive plate includes the following steps：By 2400g acrylic acid-acrylamides-acrylonitrile copolymer
It is dissolved in 6000g water, uniformly after mixing, adds 240g Super P, uniformly after mixing, add 1140g LiFePO4s,
Even mixing, adjusting viscosity are 5000mPas, and anode sizing agent is made after de-bubble is filtered, and the solid content of gained anode sizing agent is
56%, anode sizing agent is coated uniformly on above-mentioned lithium ion battery aqueous positive-pole composite current collector using extrusion coating machine, i.e.,
Obtain positive plate.
The lithium ion battery of the present embodiment, including battery container, battery core and electrolyte, battery core and electrolyte are sealed in battery
In housing, battery core includes cathode, anode and the membrane between positive and negative anodes, wherein just extremely above-mentioned positive plate, anode are
Graphite cathode of the prior art, membrane use PP bilayer microporous barriers.
Battery core is made using lamination in the lithium ion battery of the present embodiment, and is made 5Ah's according to method of the prior art
Soft bag lithium ionic cell.
Embodiment 3
The lithium ion battery aqueous positive-pole composite current collector of the present embodiment, using the preparation method system included the following steps
：
1) 200g binding agents sodium carboxymethylcellulose (CMC) is added in 15kg solvent deionized waters, be uniformly mixed, then added
Enter 1.4kg butadiene-styrene rubber (SBR), uniformly mixing, obtains binder solution；
2) add what 800g Super P and 1600g graphenes mixed in obtained binder solution into step 1)
Hybrid conductive agent, is uniformly mixed, and uses the grinding ball of 0.3mm particle diameters with the rotating speed grinding emulsification 2h of 1000rpm, de-bubble processing
8h, crosses 200 mesh sieve nets, obtains electrocondution slurry；
3) obtained electrocondution slurry in step 2) is coated uniformly on the two of plus plate current-collecting body aluminium foil using intaglio press
A surface, the thickness of aluminium foil is 25 μm, and coating surface density is 1g/m2, it is dry at 70 DEG C, to obtain the final product.
The positive plate of the present embodiment includes above-mentioned lithium ion battery aqueous positive-pole composite current collector and coated in the lithium
Positive active material on two surfaces of ion battery aqueous positive-pole composite current collector, positive active material is by following weight percent
The component composition of ratio：LiFePO4 95%, Super P 2%, acrylic acid-acrylamide-acrylonitrile copolymer 3%.
The preparation method of above-mentioned positive plate includes the following steps：By 2400g acrylic acid-acrylamides-acrylonitrile copolymer
It is dissolved in 6000g water, uniformly after mixing, adds 240g Super P, uniformly after mixing, add 1140g LiFePO4s,
Even mixing, adjusting viscosity are 5100mPas, and anode sizing agent is made after de-bubble is filtered, and the solid content of gained anode sizing agent is
56%, anode sizing agent is coated uniformly on above-mentioned lithium ion battery aqueous positive-pole composite current collector using extrusion coating machine, i.e.,
Obtain positive plate.
The lithium ion battery of the present embodiment, including battery container, battery core and electrolyte, battery core and electrolyte are sealed in battery
In housing, battery core includes cathode, anode and the membrane between positive and negative anodes, wherein just extremely above-mentioned positive plate, anode are
Graphite cathode of the prior art, membrane use PP bilayer microporous barriers.
Battery core is made using lamination in the lithium ion battery of the present embodiment, and is made 5Ah's according to method of the prior art
Soft bag lithium ionic cell.
Comparative example
Collector in this comparative example uses aluminium foil of the prior art.
Positive plate in this comparative example includes aluminium foil and the positive active material coated in aluminium foil two sides, positive active material
It is made of the component of following percentage by weight：3% binding agent LA132,3% Super P, 94% LiFePO4, according to
Positive plate is made in method of the prior art.
The lithium ion battery of this comparative example, including battery container, battery core and electrolyte, battery core and electrolyte are sealed in battery
In housing, battery core includes cathode, anode and the membrane between positive and negative anodes, wherein just extremely above-mentioned positive plate, anode are
Graphite cathode of the prior art, membrane use PP bilayer microporous barriers.Battery core is made using lamination, and according to of the prior art
The soft bag lithium ionic cell of 5Ah is made in method.
Experimental example
1) pole piece pliability is tested.
Pliability by obtained positive plate in embodiment 1-3 according to the method test pole piece in GB/T1731-1993, it is soft
The test result of tough performance is usedTo represent, wherein x represents the diameter of the mandrel rod measured when positive plate winding is cracked, test
It the results are shown in Table 1；
2) adhesive force is tested.
Obtained positive plate in embodiment 1-3 is tested positive active material on positive plate by the way of parallel drawing to apply
The adhesive force of layer, adhesive force represent that peel strength is bigger, and explanation adhesive force is bigger, and test result is shown in Table 1 with peel strength；
3) interface resistance is tested.
By obtained positive plate in embodiment 1-3 using AC impedance negotiation surface resistance test fixture test pole piece interface electricity
Size is hindered, test result is shown in Table 1.
Table 1
4) inner walkway.
Lithium ion battery in embodiment 1-3 is tested into its AC internal Resistance using alternating current impedance instrument, AC internal Resistance test
AC internal Resistance normal distribution using DC impedance tester as shown in Fig. 2, and test its DC internal resistance DCR, DC internal resistance DCR
Test result is as shown in Figure 3；
5) high rate performance and cycle performance test.
Lithium ion battery in embodiment 1-3 is tested to its high rate performance and 55 DEG C of high temperature in Battery formation detecting system
Cycle performance, wherein high rate performance are tested under 0.3C chargings, 2C discharging conditions, and test result is as shown in Figure 4；High temperature circulation
Performance is tested under conditions of 1C chargings, 1C electric discharges, and test result is as shown in Figure 5.
The pole piece of lithium ion battery aqueous positive-pole composite current collector using the present invention is soft it can be seen from table 1 and Fig. 1-4
Toughness is preferable, and adhesive force is also far longer than pole piece of the prior art, has reached 14.5-16.4N/m, and surface resistance is less than existing skill
The surface resistance of pole piece in art, is 0.06-0.09 Ω/mm2, the lithium ion battery internal resistance using above-mentioned collector is smaller, multiplying power
Performance and cycle performance, which are obtained for, to be increased substantially.
Claims (9)
1. a kind of lithium ion battery aqueous positive-pole composite current collector, it is characterised in that using the preparation method included the following steps
It is made：
1）Binding agent is added in solvent, is uniformly mixed, obtains binder solution；The mass ratio of the binding agent and solvent is 1:
10-30；
2）To step 1）In add conductive agent in obtained binder solution, be uniformly mixed, grinding emulsification, carries out de-bubble, sieving
Processing, obtains electrocondution slurry；The mass ratio of the conductive agent and binding agent is 1-9:1；It is described grinding emulsification grinding rate be
1000-1500rpm, grinding emulsification use ceramic grinding ball, particle diameter 0.4-1mm, and grinding emulsification times are not less than 1h；It is described
De-bubble, sieving processing are specially the slurry after grinding emulsification is kept at least 8h under the vacuum state no more than 0.08MPa
200-300 mesh sieve nets are crossed afterwards；
3）By step 2）In obtained electrocondution slurry be coated in plus plate current-collecting body surface, it is dry, to obtain the final product；
The solid content of the electrocondution slurry is 10-30wt%, and viscosity is 20-500mPa s；The surface density of gained conductive coating is 1-
2g/m2。
2. lithium ion battery aqueous positive-pole composite current collector as claimed in claim 1, it is characterised in that the conductive agent is
One or more in Super P, KS-6, carbon fiber, carbon nanotubes, graphene.
3. lithium ion battery aqueous positive-pole composite current collector as claimed in claim 1, it is characterised in that the solvent is N- first
Base pyrrolidones or water.
4. lithium ion battery aqueous positive-pole composite current collector as claimed in claim 1, it is characterised in that the step 3）In do
Dry temperature is 60-140 DEG C.
5. lithium ion battery aqueous positive-pole composite current collector as claimed in claim 1, it is characterised in that the binding agent is poly-
Vinylidene fluoride, polyvinyl alcohol, polyurethane, sodium carboxymethylcellulose, butadiene-styrene rubber, polyacrylate, polyacrylonitrile, polypropylene
One or more in acid amides, ethylene-vinyl acetate copolymer emulsion.
6. lithium ion battery aqueous positive-pole composite current collector as claimed in claim 1, it is characterised in that the plus plate current-collecting body
For aluminium foil, the thickness of aluminium foil is 10-25 μm.
7. a kind of positive plate, it is characterised in that including lithium ion battery aqueous positive-pole as claimed in any one of claims 1 to 6
Composite current collector and the positive active material coated in the lithium ion battery aqueous positive-pole composite current collector surface, the cathode
Active material is made of the component of following percentage by weight：Positive electrode 90%-98%, conductive agent 0.5%-8%, positive electrode binder
1.5%-8%。
8. the preparation method of positive plate as claimed in claim 7, it is characterised in that include the following steps：By positive electrode binder
Uniformly mixed with water, add conductive agent, add positive electrode after mixing, be uniformly mixed to obtain anode sizing agent, cathode is starched
Material is coated in the lithium ion battery aqueous positive-pole composite current collector surface, dry, to obtain the final product；The matter of the positive electrode binder and water
Amount is than being 1:20-50.
9. a kind of lithium ion battery, it is characterised in that use positive plate as claimed in claim 7.
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| CN201510723952.0A CN105261760B (en) | 2015-10-30 | 2015-10-30 | Lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion battery |
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| CN105968929A (en) * | 2016-07-01 | 2016-09-28 | 天津普兰能源科技有限公司 | Preparation method of thin-film coating |
| CN106972193A (en) * | 2017-03-27 | 2017-07-21 | 湖北猛狮新能源科技有限公司 | A kind of high magnification fills the preparation method of lithium ion battery soon |
| CN107039636A (en) * | 2017-03-30 | 2017-08-11 | 湖北金泉新材料有限责任公司 | Anode pole piece preparation method, anode pole piece, preparation method of lithium ion battery |
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| WO2023230872A1 (en) * | 2022-05-31 | 2023-12-07 | Guangdong Haozhi Technology Co. Limited | Modified current collector for secondary battery |
| KR20240022600A (en) * | 2022-06-09 | 2024-02-20 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Positive electrode plates, secondary batteries, battery modules, battery packs, and electrical devices |
| WO2024011465A1 (en) * | 2022-07-13 | 2024-01-18 | 宁德时代新能源科技股份有限公司 | Positive electrode sheet and preparation method therefor, battery cell, battery, and electric device |
Family Cites Families (4)
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| CN101938010A (en) * | 2009-07-01 | 2011-01-05 | 江苏双登集团有限公司 | Manufacturing method of polymer lithium-ion power battery |
| CN202231097U (en) * | 2011-07-19 | 2012-05-23 | 中航锂电（洛阳）有限公司 | High-rate lithium-ion battery and composite pole piece thereof |
| CN102945945A (en) * | 2012-11-16 | 2013-02-27 | 双登集团股份有限公司 | Production method for pole piece of lithium ion battery |
| CN104779416A (en) * | 2015-03-24 | 2015-07-15 | 中航锂电（洛阳）有限公司 | Lithium ion battery electrolyte solution and lithium ion battery |
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