CN108963158A - A kind of preparation method of the polymer-coated film of the key compound containing P-O - Google Patents
A kind of preparation method of the polymer-coated film of the key compound containing P-O 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/52—Separators
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
Abstract
The present invention relates to a kind of preparation methods of the polymer-coated film of key compound containing P-O, it is characterized in that preparation step is as follows: acetone, dimethylformamide being mixed to get mixed solution according to volume ratio (0.1~10): 1 in a kettle, add the coating agent of 0.5~2.5% weight of mixed solution weight, 1~5% weight of Kynoar-hexafluoropropene and 0.5~2.5% weight polymethyl methacrylate, 10~50min of supersonic oscillations；8~12 h are stirred at 50~90 DEG C, and thick liquid is made.In the coating on base films thick liquid that Low Temperature Plasma Treating is crossed, pass through dry obtained polymer-coated film.Cost of material of the invention is lower, and preparation process is simple, easy to operate, time-consuming is few, and the coating film of preparation is for that can improve the discharge performance of battery in battery system, the discharge capacity of battery is increased, improves the cycle performance of battery, lays a good foundation for industrialization.
Description
Technical field
The present invention relates to a kind of preparation methods of the polymer-coated film of key compound containing P-O, and in particular to one kind is available
In the preparation method of the coating film of lithium battery, lithium ion battery, polymer battery and supercapacitor, belong to battery diaphragm preparation
Technical field.
Technical background
Lithium ion battery has many advantages, such as that big voltage height, capacity, memory-less effect, service life are long, is widely used in mobile electricity
In the power tools such as the digital products such as words, digital camera, laptop and electric vehicle, hybrid electric vehicle.Diaphragm is lithium ion
The important component of battery.In battery system, diaphragm plays a part of to prevent electrical communication, conducting ion between anode and cathode.
Diaphragm has important role to battery performance and safe handling.According to the difference of diaphragm production technology, battery diaphragm can be divided into dry
Method film, wet process film and composite membrane.
The preparation process of film by dry method is by polyolefin resin by feeding, melting extrusion, stretching, cooling, heat treatment, stretching
Pore-forming, thermal finalization, traction, cutting, winding and etc. prepare diaphragm (Huang Youqiao, etc., ship power technology, 2011,31 (1):
26-29.).By draw direction difference, dry process can be divided into simple tension and biaxial tension.The advantages of dry process is technique
Simply, production process pollutes small, production efficiency and high yield rate.The shortcomings that this method is that the aperture of diaphragm is difficult to control, is horizontal
To easy to crack, safety and reliability is low.
The preparation process of wet process film is to mix liquid or small-molecule substance with polyolefin resin, and heating melting is at uniform
Mixture, cooling occurs mutually to separate, and forms diaphragm.Diaphragm is heated to pass through biaxial tension, heat preservation, elution close to fusing point
Solvent and etc., it is made microporous barrier (Xu Dan, etc. plastics industry, 2013,41 (3): 94-97.).The preparation of this method every
Film has round micropore.Its micropore has the characteristics that aperture is small, pore size distribution is uniform.
Dry method membrane process mainly uses PP raw material, and wet process film mainly uses PE raw material.Composite membrane has merged film by dry method and wet
The characteristics of method film, has the advantages that closed pore temperature is low, fusing-off temperature is high, lateral shrinkage is low etc..
In abuse conditions, lithium ion battery is likely to be at 100~300 DEG C of high temperature section, due to polyethylene (PE), gathers
Propylene (PP), polyolefin composite film (e.g., PP/PE/PP, PE/PP) at high temperature can contraction distortion, using polyolefin film lithium from
There are security risks for sub- battery.The nano materials such as coating alumina usually on polyolefin film form coating diaphragm.This
It coats in diaphragm, organic material assigns diaphragm flexibility, meets the requirement of battery assembly.Under high temperature, organic component can be melted, and be blocked up
Diaphragm hole is filled in, slows down or prevents cell reaction, ensure the safety of battery.Inorganic material is distributed in diaphragm outer layer, plays rigidity
The effect of skeleton ensures the safety of lithium ion battery.Coating diaphragm is generally made of basement membrane, adhesive, inorganic nano material.
From the point of view of adhesive, current coating diaphragm generally uses PVDF resin [Hennige V., et al. US
7790321,2010. 7. 9.], [Zhao Jinbao waits, Chinese invention patent, CN to polymethyl methacrylate (PMMA)
103035866 A, 2013.4.10.], butadiene-styrene rubber (SBR) [Park J. H., et al. J. Power Sources,
2010,195 (24): 8306-8310.], silica solution [Lee J. R., et al. J. Power Sources, 2012,
216:42-47.] and Kynoar-hexafluoropropene (PVDF-HFP) [Jeong H. S., et al. Electrochim.
The binders such as Acta, 2012,86:317-322.].Sohn etc. is by polymethyl methacrylate (PMMA), Kynoar-
Hexafluoropropene (PVDF-HFP) and nanometer Al2O3Mixture as coating agent [Sohn J. Y., et al., J. Solid
State Electrochem., 2012,16,551-556.], it is coated on PE film, is prepared for PVDF-HFP/PMMA coating
Diaphragm.
Forefathers' research has shown that the regularity of PVDF molecular structure is larger, and macromolecular chain arrangement is close, and the fluorine in strand is former
Son and hydrogen atom exist compared with strong hydrogen bonding effect, and tensile strength, compressive strength and impact flexibility of polymer etc. are larger.Adsorption theory
Think, bonding be two kinds of materials intermolecular contacts and interfacial force caused by.The main source of bonding force is intermolecular force,
Including hydrogen bond and Van der Waals force.Adhesive and continuously contacting with for adherend referred to as soak, and to obtain good wetting effect requirement
The surface tension of adhesive is less than the surface tension of adherend.For untreated polymer, such as polyethylene, polypropylene,
The inertia on surface is larger, is difficult to be bonded.
Jeong etc. [Jeong H. S., et al. Electrochim. Acta, 2012,86:317-322.]
The study found that the ratio regular meeting of Kynoar-hexafluoropropene (PVDF-HFP) binder and particle has the performance of coating diaphragm
Significant impact.The content for improving binder in coat can reduce falling off for coat particle, improve diaphragm mechanical performance.No
It crosses, the coat particle of binder cladding can change the surface nature of basement membrane, the wetability to electrolyte be reduced, to for big electricity
The performance for flowing the battery of charge and discharge is unfavorable.Song etc. [Song J., et al. Electrochim. Acta, 2012,85:
524-530.] discovery, nanometer coated particle is easily deposited in the duct of basement membrane under binder effect, reduces the hole of coating diaphragm
Rate increases the resistance of lithium ion cross-film diffusion.
From the point of view of applying coating, the inorganic material studied includes nanometer Al2O3、ZrO2、SiO2、TiO2、MgO、CaO、
CaCO3、BaSO4, zeolite, boehmite, clay etc..[Takemura D., the et al. J. Power such as Takemura
Sources, 2005,146 (1/2): 779-783.] investigate Al2O3Influence of the partial size to membrane properties.They have found, apply
Cover Al2O3The high temperature resistance of diaphragm can be improved.Choi etc. [Choi E. S., et al. J. Mater. Chem.,
2011, (38): 14747-14754.] use the SiO of partial size 40nm2Coat PE microporous barrier, preparation coating diaphragm.Special duct
Inorganic material also be used to replace nanometer Al2O3As coating agent, in the battery system of this coating diaphragm, the lithium of solvation
Ion can provide " green channel " along inorganic particle and directly transmit.
From the point of view of basement membrane, since the reactivity of polyolefin-based film surface is little, between the coating and basement membrane on coating diaphragm
It bonds not close.In long-term charge and discharge process, the coat for coating diaphragm is easy to fall off.Especially untreated polyene hydrocarbonylation
Object is closed to be difficult to be bonded such as polyethylene, polypropylene.
During long-term charge and discharge cycles, coating diaphragm is easy to appear picking phenomenon.In order to improve this phenomenon, Chen
Deng [Chen H., et al. Plasma activation and atomic layer deposition of TiO2 on
Polypropylene membranes for improved performances of lithium-ion batteries,
J. Membr. Sci., 2014,458,217-224.] first with the surface of plasma technique processing PP film, then it is coated with
TiO2, coating diaphragm is made.Studies have shown that corona treatment can generate polar group on the surface of PP film, be conducive to TiO2
In the dispersion of membrane surface.The diaphragm of preparation imbibition rate with higher and ionic conductivity, and compared with low heat shrinkage.Assembly
Lithium ion battery specific discharge capacity with higher and preferable multiplying power discharging property.
Although by above-mentioned study on the modification there is problem in the application of battery system in coating diaphragm.For example, coating every
Film will increase the internal resistance of cell, and discharge capacity of the cell is made to be difficult to bring into play.Picking influences the security performance of battery.Applying coating with
There is matching in anode, cathode, electrolyte.
In order to solve the problems, such as coating diaphragm application, the compound of the key containing P-O is added in the present invention in coat,
It reacts, is formed and the valuable key connection of basement membrane by the compound of the key containing P-O and the polyolefin base membrane of corona treatment
Coat significantly improves the binding force between the coating and basement membrane coated in coating diaphragm, reduces the internal resistance of cell, make the electric discharge of battery
Capacity gives full play of, and reduces picking phenomenon.The wetability of the compound of the key containing P-O is stronger, strong to the affinity of electrolyte,
Imbibition ability is strong.It is good with the matching of anode, cathode, electrolyte, hence it is evident that improve the performance of coating film.
Summary of the invention
The technical solution adopted in the present invention comprises the steps of:
In a kettle, according to volume ratio (0.1~10): mixed solution is made in 1 mixing acetone and dimethylformamide.It is added
The coating agent of 0.5~2.5% weight of mixed solution weight, 1~30 min of supersonic oscillations, obtains uniformly mixed suspension.
Kynoar-hexafluoropropene of 1.0~5.0% weight of mixed solution weight is added in suspension.Add mixed solution
The polymethyl methacrylate of 0.5~2.5% weight of weight.10~50min of supersonic oscillations.At 50~90 DEG C stirring 8~
12 h make solution in reaction kettle be changed into thick liquid.Basement membrane is tiled, with low temperature plasma to a surface of basement membrane at
Reason 1s~5min respectively handles 1s~5min to two surfaces of basement membrane, and thick liquid is coated in the table of treated basement membrane
On face, vacuum drying or forced air drying are carried out at any temperature of 50~110 DEG C of temperature ranges, and polymer-coated film is made.
The vacuum drying is the heat drying carried out under 0.1~0.00001atm pressure.
The coating agent is the phosphorus of the phosphate of monovalent cation of the partial size in the μ m of 1nm~5, bivalent cation
The phosphate of hydrochlorate or Tricationic.
The phosphate of the Tricationic is aluminum phosphate, scandium phosphate, ferric phosphate, phosphoric acid gallium or yttrium phosphate.
The phosphate of the bivalent cation is magnesium phosphate, trbasic zinc phosphate, calcium phosphate, cupric phosphate, strontium phosphate or barium phosphate.
The phosphate of the monovalent cation is that silver orthophosphate, lithium phosphate or phosphoric acid are cuprous.
Kynoar-the hexafluoropropene is Kynoar-hexafluoro of the average molecular weight in 20~2,800,000 ranges
Propylene.
The polymethyl methacrylate is polymethyl methacrylate of the average molecular weight in 60~1,600,000 ranges.
The basement membrane is monofilm or multilayer film.
The basement membrane is polypropylene or polyethylene film monofilm, or the multilayer film containing polypropylene layer.
The basement membrane is polypropylene or polyethylene monolayer film, or the multilayer film containing polyethylene layer.
The monofilm or multilayer film is the diaphragm prepared with the dry or wet technique in diaphragm field.
The multilayer film is the number of plies diaphragm that monofilm forms in 2~10 ranges.
Cost of material of the invention is lower, and preparation process is simple, easy to operate, and time-consuming is few, and the coating film of preparation is for electricity
In pond body system, although the impedance of diaphragm can be increased to a certain extent, due to coating film coat and battery pole piece and
Cohesive force can be generated between basement membrane, the impedance of battery system and the polarization phenomena of charge and discharge process can be obviously reduced, and improve battery
Discharge performance.During long-term charge and discharge cycles, the matching of this coating diaphragm and anode, cathode, electrolyte etc. is bright
It is aobvious to improve, the discharge capacity of battery is increased, improves the cycle performance of battery, lays a good foundation for industrialization.
Detailed description of the invention
Fig. 1 is sample -- discharge capacity and circulation of the button cell under 1C multiplying power electric current prepared by the embodiment of the present invention 1
Several relation curves.
Fig. 2 is the basement membrane of coating film prepared by the embodiment of the present invention 1 and the infrared figure of coating bed boundary.
Fig. 3 is the basement membrane of coating film prepared by the embodiment of the present invention 2 and the infrared figure of coating bed boundary.
Specific embodiment
The present invention is further detailed below with reference to embodiment.Embodiment is only to further supplement of the invention
And explanation, rather than the limitation to invention.
Embodiment 1
In a kettle, according to volume ratio 4:1 mixing acetone and dimethylformamide, mixed solution is obtained.Mixed solution is added
Uniformly mixed suspension is made in 1.25% weight of weight and the aluminum phosphate of partial size 5nm, 15 min of supersonic oscillations.Suspended
2.5% weight of mixed solution weight is added in liquid and Kynoar-hexafluoropropene of average molecular weight 1,500,000 and mixing are molten
1.25% weight of liquid weight and the polymethyl methacrylate of average molecular weight 800,000, supersonic oscillations 25min.At 60 DEG C
9 h are stirred, solution in reaction kettle is made to be changed into thick liquid.Polypropylene monofilm prepared by dry method membrane process is (with a thickness of 20 μ
M) it tiles, respectively handles 60s with two surfaces of the low temperature plasma to monofilm, thick liquid is respectively coated on by place
On two surfaces of the monofilm of reason.Make 12 μm of overall thickness of coat on two surfaces, in 60 DEG C and 0.01 atmospheric pressure
Polymer-coated film is made in lower vacuum drying.
Li will be formed1.05Ni0.5Co0.2Mn0.3O2Tertiary cathode material, acetylene black and the PVDF binder of type are according to 85:10:
5 weight ratio weighs, and using N-Methyl pyrrolidone as grinding aid, uniform sizing material is made in ball milling mixing 3h.Uniform sizing material is coated
In aluminum foil current collector, positive plate is made after drying.Lithium metal, the coating film of preparation, positive plate, battery case and electrolyte are set
In the glove box full of argon gas, it is assembled into CR2025 type button cell.To the button of preparation on new Weir battery test system
Formula battery carries out charge and discharge and cycle performance test.Test temperature is room temperature (25 ± 1 DEG C).The section of charge and discharge be 2.5~
4.6V.Charge and discharge cycles experiment carries out under 1C multiplying power electric current.
Embodiment 2
In a kettle, according to volume ratio 0.1:1 mixing acetone and dimethylformamide, mixed solution is obtained.It is molten that mixing is added
0.5% weight of liquid weight and the aluminum phosphate of partial size 1nm.Uniformly mixed suspension is made in supersonic oscillations 1min.Suspended
1% weight and the average molecular weight of mixed solution weight are added in liquid as 200,000 Kynoar-hexafluoropropene, adds mixed
Close 0.5% weight of solution weight and the polymethyl methacrylate of average molecular weight 600,000, supersonic oscillations 10min.At 50 DEG C
8 h of lower stirring, make solution in reaction kettle be changed into thick liquid.By the polyethylene monolayer film tiling of wet processing preparation, use is low
Thick liquid is coated on the surface of treated monofilm a surface treatment 1s of monofilm by isothermal plasma.
It is dried in vacuo under 50 DEG C and 0.1 atmospheric pressure, polymer-coated film is made.
Embodiment 3
In a kettle, according to volume ratio 10:1 mixing acetone and dimethylformamide, mixed solution is made.Mixed solution is added
2.5% weight and 5 μm of partial size of ferric phosphate of weight.Uniformly mixed suspension is made in supersonic oscillations 30min.In suspension
Kynoar-hexafluoropropene of middle 5% weight that mixed solution weight is added and average molecular weight 2,800,000, it is molten to add mixing
2.5% weight of liquid weight and the polymethyl methacrylate of average molecular weight 1,600,000, supersonic oscillations 50min.It is stirred at 90 DEG C
12 h are mixed, solution in reaction kettle is made to be changed into thick liquid.By the compound obtained PP/ of PP and PE film prepared by dry method membrane process
The tiling of PE/PP multilayer film, respectively handles 5min with two PP layer surfaces of the low temperature plasma to PP/PE/PP multilayer film, will glue
Thick liquid is coated on the surface of treated multilayer film, is dried in vacuo under 110 DEG C and 0.00001 atmospheric pressure, is made
Polymer-coated film.
Embodiment 4
In a kettle, according to volume ratio 1:1 mixing acetone and dimethylformamide, mixed solution is obtained.Mixed solution is added
2% weight of weight and partial size 5nm's is magnesium phosphate.Uniformly mixed suspension is made in 20 min of supersonic oscillations.Suspended
3.3% weight of mixed solution weight and Kynoar-hexafluoropropene of average molecular weight 300,000 are added in liquid, adds mixed
Close 1% weight of solution weight and the polymethyl methacrylate of average molecular weight 800,000, supersonic oscillations 20min.At 60 DEG C
10 h are stirred, solution in reaction kettle is made to be changed into thick liquid.The compound obtained PP/PE of PP and PE film prepared by wet processing
Multilayer film tiling, respectively handle 100s with two surfaces of the low temperature plasma to multilayer film, by thick liquid be coated in pass through
It on two surfaces of the multilayer film of processing, is dried in vacuo under 90 DEG C and 0.1 atmospheric pressure, polymer-coated film is made.
Embodiment 5
In a kettle, according to volume ratio 0.1:1 mixing acetone and dimethylformamide, mixed solution is obtained.It is molten that mixing is added
1% weight of liquid weight and 5 μm of partial size are calcium phosphate, and uniformly mixed suspension is made in 30 min of supersonic oscillations.Outstanding
5% weight of mixed solution weight and Kynoar-hexafluoropropene of average molecular weight 1,800,000 are added in turbid.It adds mixed
Close 1.4% weight of solution weight and the polymethyl methacrylate of average molecular weight 1,000,000, supersonic oscillations 15min.80
9 h are stirred at DEG C, and solution in reaction kettle is made to be changed into thick liquid.It obtains polypropylene screen prepared by dry process is compound
The tiling of PP/PP multilayer film is opened, and respectively handles 3 min with two surfaces of the low temperature plasma to multilayer film, thick liquid is distinguished
On two surfaces coated in treated multilayer film, in 50 DEG C of forced air dryings, polymer-coated film is made.
Embodiment 6
In a kettle, according to volume ratio 10:1 mixing acetone and dimethylformamide, mixed solution is obtained.Mixed solution is added
2% weight of weight and the silver orthophosphate of grain diameter 50nm.Uniformly mixed suspension is made in 1 min of supersonic oscillations.Outstanding
1% weight of mixed solution weight and Kynoar-hexafluoropropene of average molecular weight 1,000,000 are added in turbid, adds mixed
Close 2.5% weight of solution weight and the polymethyl methacrylate of average molecular weight 600,000, supersonic oscillations 50min.At 50 DEG C
Lower stirring 8h, makes solution in reaction kettle be changed into thick liquid.By the polypropylene monofilm tiling of dry process preparation, low temperature is used
Thick liquid is coated on treated monofilm a surface treatment 30s of monofilm by plasma, in 60 DEG C and
It is dried in vacuo under 0.0008 atmospheric pressure, polymer-coated film is made.
Embodiment 7
In a kettle, according to volume ratio 5:1 mixing acetone and dimethylformamide, mixed solution is obtained.Mixed solution is added
Uniformly mixed suspension is made in 0.67% weight of weight and the aluminum phosphate of grain diameter 100nm, 30 min of supersonic oscillations.
Kynoar-hexafluoropropene of 5% weight of addition mixed solution weight and average molecular weight 2,600,000 in suspension, then plus
Enter 2% weight of mixed solution weight and the polymethyl methacrylate of average molecular weight 900,000, supersonic oscillations 20min.70
12 h are stirred at DEG C, and solution in reaction kettle is made to be changed into thick liquid.PP and PE film prepared by wet processing is complex as PP/PE
Thick liquid is coated at by multilayer film tiling with low temperature plasma to the surface treatment 5min of the PP layer of multilayer film
It on the surface of reason, is dried in vacuo under 100 DEG C and 0.005 atmospheric pressure, polymer-coated film is made.
Claims (10)
1. a kind of preparation method of the polymer-coated film of key compound containing P-O, it is characterised in that technical solution is by following steps
Composition: in a kettle, according to volume ratio (0.1~10): mixed solution is made in 1 mixing acetone and dimethylformamide；It is added
Uniformly mixed suspension is made in the coating agent of 0.5~2.5% weight of mixed solution weight, 1~30 min of supersonic oscillations；
Kynoar-hexafluoropropene of 1~5% weight of mixed solution weight is added in suspension；Add mixed solution weight
0.5~2.5% weight polymethyl methacrylate；10~50min of supersonic oscillations；8~12 are stirred at 50~90 DEG C
H makes solution in reaction kettle be changed into thick liquid；Basement membrane tiling is opened, with low temperature plasma to a surface of basement membrane or
Two surfaces respectively handle 1s~5min；Thick liquid is coated on the surface of treated basement membrane, in 50~110 DEG C of temperature
Vacuum drying or forced air drying are carried out at any temperature in section, and polymer-coated film is made；
The coating agent is the phosphate of Tricationic, bivalent cation or monovalent cation.
2. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The vacuum drying is the heat drying carried out under 0.1~0.00001atm pressure.
3. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The phosphate of the Tricationic is aluminum phosphate, scandium phosphate, ferric phosphate, phosphoric acid gallium or yttrium phosphate.
4. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The phosphate of the bivalent cation is magnesium phosphate, trbasic zinc phosphate, calcium phosphate, cupric phosphate or barium phosphate.
5. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The phosphate of the monovalent cation is that silver orthophosphate, lithium phosphate or phosphoric acid are cuprous.
6. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The coating agent is phosphate of the partial size in the μ m of 1nm~5.
7. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
Kynoar-the hexafluoropropene is Kynoar-hexafluoropropene of the average molecular weight in 20~2,800,000 ranges.
8. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The polymethyl methacrylate is polymethyl methacrylate of the average molecular weight in 60~1,600,000 ranges.
9. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 1, it is characterised in that
The basement membrane is polypropylene or polyethylene monolayer film, the multilayer film containing polypropylene layer or the multilayer film containing polyethylene layer.
10. a kind of preparation method of the polymer-coated film of key compound containing P-O according to claim 9, feature exist
In the multilayer film, the number of plies is in 2~10 ranges.
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| CN111900306A (en) * | 2020-07-13 | 2020-11-06 | 江苏可兰素环保科技有限公司 | High-energy-density lithium battery diaphragm and preparation method thereof |
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