CN110484066A - A kind of table applies slurry and its coating method - Google Patents

A kind of table applies slurry and its coating method Download PDF

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Publication number
CN110484066A
CN110484066A CN201910753833.8A CN201910753833A CN110484066A CN 110484066 A CN110484066 A CN 110484066A CN 201910753833 A CN201910753833 A CN 201910753833A CN 110484066 A CN110484066 A CN 110484066A
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CN
China
Prior art keywords
slurry
applies
pole piece
parts
coating method
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Pending
Application number
CN201910753833.8A
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Chinese (zh)
Inventor
董伟民
张伟
王健
郭赛恺
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Tianjin EV Energies Co Ltd
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Tianjin EV Energies Co Ltd
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Priority to CN201910753833.8A priority Critical patent/CN110484066A/en
Publication of CN110484066A publication Critical patent/CN110484066A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B05D1/265—Extrusion coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0263—After-treatment with IR heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • B05D3/0426—Cooling with air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/16—Homopolymers or copolymers of vinylidene fluoride
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/664—Ceramic materials
    • 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
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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 provides a kind of tables to apply slurry, which applies slurry and be made of the raw material including following parts by weight: 5-10 parts of nano- γ-ALOOH, and 0.45-1.5 parts of binder, 0.005-0.04 parts of clarifier, 0.005-0.04 parts of defoaming agent, 0.005-0.04 parts of dispersing agent.Table of the present invention is transparent or semitransparent coating after applying slurry drying, can be convenient rear process detection active material size, can carry out uniformity detection, pole piece size detection is carried out simultaneously, accurate feedback table applies the coated weight uniformity, improves production yield, saves the testing time.

Description

A kind of table applies slurry and its coating method
Technical field
The invention belongs to field of lithium ion battery, apply slurry and its coating method more particularly, to a kind of table.
Background technique
The security performance and service life of lithium ion battery are all everybody focus of attention, especially power battery all the time Fast-developing application so that people to the security performance and service life of lithium ion battery more concerned about power battery performance Promoted also more urgent, ion battery professional also does always unremitting effort, the table of pole piece apply technique just meet the tendency of and It is raw.
It is exactly that a thin layer of ceramic coating is coated on electrodes of lithium-ion batteries surface that pole piece table, which applies, and ceramic coating has exhausted Edge, ion conduction and stronger mechanical performance can effectively prevent the inside micro-short circuit of battery core, improve the antivibration of battery It is dynamic, squeeze, the ability of the safety tests such as needle thorn, and table apply after coating pole piece is played after certain supporting role prevents circulating battery The collapsing of phase pole piece crushes.
What pole piece table painting at present generallyd use is to coat Al2O3 ceramic slurry in pole piece, and appearance is opaque white color Coating controls the coated weight uniformity of ceramic coating using traditional weight detecting or Thickness sensitivity mode.And existing detection Technology cannot completely feed back the uniformity of ceramic coating.The coated weight of ceramic coating is minimum, and the fluctuation close to active material is public Difference, when detection table being caused to apply weight, receptor 1 activity substance influence of fluctuations can not be measured accurately；Laterally exist due to rolling rear pole piece Thickness is very poor, fluctuates in ± 2um, so needing to take piece to pole piece severing, the waste for causing process to produce.
Summary of the invention
In view of this, table is transparent when applying slurry coating the present invention is directed to propose a kind of table applies slurry and its coating method Shape, coating is transparent or translucent after coating is dry, can carry out uniformity detection, while carrying out pole piece size detection.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of table painting slurry, the table apply slurry by including that the raw material of following parts by weight is made:
Preferably, the table applies slurry by including that the raw material of following parts by weight is made:
Further, the binder is PVDF and dibutyl phthalate；The weight of PVDF in the binder Part is 0.3-1 parts, and the parts by weight of dibutyl phthalate are 0.15-0.5 parts；The molecular weight of the PVDF is 40-60 ten thousand.
Further, the clarifier is TM-6；The defoaming agent is polyethers；The dispersing agent is polyacrylamide Amine.
Further, the partial size of the nano- γ-ALOOH is 5-10nm, straight-line luminous transmittance 90-95%.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent, nano- γ-ALOOH, clarifier, defoaming agent are added thereto and divided Powder is stirred and is configured to slurry；
(2) slurry is uniformly coated on pole piece, carries out primary heating, bubble in slurry is discharged all, and uniform flow It is flat, table coating layer is formed after then carrying out reheating, dry cold wind cooling.
Further, the solvent in the step (1) is NMP；The solid content of slurry in the step (1) is 20- 25%, viscosity 50-200cp.
Further, the speed of application step is 100-200m/min in the step (2).
Further, the primary heating step in the step (2) is that vacuum and low temperature heats, vacuum degree≤- 0.090MPa, Temperature is 40-60 DEG C；Second heating step in the step (2) is that vacuum infrared heats, vacuum degree≤- 0.090MPa, Temperature is 120-180 DEG C；The temperature of dry cold wind cooling step is 20-30 DEG C in the step (2).
Further, the color of the pole piece in the step (2) is black, and the color of table coating layer is transparent or semi-transparent It is bright；The table coating layer with a thickness of 3-5 μm.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry.
Compared with the existing technology, table of the present invention applies slurry and its coating method has the advantage that
(1) it is transparent or semitransparent coating after table of the present invention applies slurry drying, can be convenient rear process detection Active material size can carry out uniformity detection, while carry out pole piece size detection, and it is uniform that accurate feedback table applies coated weight Degree improves production yield, saves the testing time.
(2) coating method of the present invention guarantees that slurry is evenly distributed by extrusion coated, and wet slurry carries out very first Empty low-temperature bake guarantees that microvesicle is all precipitated in slurry, and uniform levelling；Then it is dry to enter vacuum infrared for unseasoned pole piece Area carries out high temperature drying, dries NMP rapidly in anaerobic condition, avoid binder oxidative color-developing, and foil is avoided to aoxidize； Last pole piece enters conventional ovens, using dry cold wind fast cooling, reduces binder crystallinity, improves table and applies transparency, by In there are infrared rapid draing area, coating speed is up to 100-200m/min.
(3) it includes dispersing agent in formula of size that table of the present invention, which applies, improves nano- γ-ALOOH dispersibility, guarantees Slurry stabilization is not reunited；Comprising defoaming agent, is free of in guarantee table painting slurry or only micro bubble, reduction exist due to bubble Caused light-proofness；Comprising clarifier, table coating layer transparency is improved；Select nano- γ-ALOOH nanometer materials, light transmittance In 90-95%, guarantee table coating layer translucency, binder is arranged in pairs or groups using PVDF and dibutyl phthalate, is improved whole steady Qualitative and caking property.
Specific embodiment
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described Experimental method is unless otherwise specified conventional method.
Below with reference to embodiment, the present invention will be described in detail.
Embodiment 1
A kind of table painting slurry, the table apply slurry and are made of the raw material including following parts by weight: 7 parts of nano- γ-ALOOH, 0.3 part of dibutyl phthalate, PVDF0.6 parts, 0.015 part of TM-6,0.015 part of polyethers, 0.015 part of polyacrylamide.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent NMP, nano- γ-ALOOH, clarifier, defoaming agent is added thereto It with dispersing agent, is stirred and is configured to slurry, the solid content of slurry is 23%, viscosity 100cp；
(2) slurry is uniformly coated on pole piece, coating speed 150m/min, progress vacuum and low temperature heating, vacuum degree≤- 0.090MPa, temperature are 50 DEG C, bubble in slurry are discharged all, and uniform levelling, then carry out vacuum infrared heating, are being lacked Oxygen condition dries rapidly NMP, and slurry is avoided to develop the color, and foil is avoided to aoxidize, temperature control at 150 DEG C, vacuum degree≤- 0.090MPa finally enters conventional ovens, is cooled down using dry cold wind, and cold wind temperature is maintained at 25 ± 5 DEG C, reduces PVDF crystallization Degree improves table and applies transparency, forms table coating layer.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry.
Embodiment 2
A kind of table painting slurry, the table apply slurry and are made of the raw material including following parts by weight: 10 parts of nano- γ-ALOOH, 0.5 part of dibutyl phthalate, 1.0 parts of PVDF, 0.03 part of TM-6,0.02 part of polyethers, 0.02 part of polyacrylamide.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent NMP, nano- γ-ALOOH, clarifier, defoaming agent is added thereto It with dispersing agent, is stirred and is configured to slurry, the solid content of slurry is 25%, viscosity 150cp；
(2) slurry is uniformly coated on pole piece, coating speed 100m/min, progress vacuum and low temperature heating, vacuum degree≤- 0.090MPa, temperature are 55 DEG C, bubble in slurry are discharged all, and uniform levelling, then carry out vacuum infrared heating, are being lacked Oxygen condition dries rapidly NMP, and slurry is avoided to develop the color, and foil is avoided to aoxidize, temperature control at 170 DEG C, vacuum degree≤- 0.090MPa finally enters conventional ovens, is cooled down using dry cold wind, and cold wind temperature is maintained at 25 ± 5 DEG C, reduces PVDF crystallization Degree improves table and applies transparency, forms table coating layer.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry.
Embodiment 3
A kind of table painting slurry, the table apply slurry and are made of the raw material including following parts by weight: 5 parts of nano- γ-ALOOH, 0.15 part of dibutyl phthalate, 0.4 part of PVDF, 0.03 part of TM-6,0.03 part of polyethers, 0.02 part of polyacrylamide.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent NMP, nano- γ-ALOOH, clarifier, defoaming agent is added thereto It with dispersing agent, is stirred and is configured to slurry, the solid content of slurry is 20%, viscosity 100cp；
(2) slurry is uniformly coated on pole piece, coating speed 200m/min, progress vacuum and low temperature heating, vacuum degree≤- 0.090MPa, temperature are 60 DEG C, bubble in slurry are discharged all, and uniform levelling, then carry out vacuum infrared heating, are being lacked Oxygen condition dries rapidly NMP, and slurry is avoided to develop the color, and foil is avoided to aoxidize, temperature control at 180 DEG C, vacuum degree≤- 0.090MPa finally enters conventional ovens, is cooled down using dry cold wind, and cold wind temperature is maintained at 25 ± 5 DEG C, reduces PVDF crystallization Degree improves table and applies transparency, forms table coating layer.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry.
Comparative example 1
A kind of table painting slurry, the table apply slurry and are made of the raw material including following parts by weight: 5 parts of nano- γ-ALOOH, 0.15 part of dibutyl phthalate, 0.4 part of PVDF, 0.03 part of TM-6,0.03 part of polyethers, 0.02 part of polyacrylamide.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent NMP, nano- γ-ALOOH, clarifier, defoaming agent is added thereto It with dispersing agent, is stirred and is configured to slurry, the solid content of slurry is 20%, viscosity 100cp；
(2) slurry is uniformly coated on pole piece, forms table coating layer after drying.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry, and it is opaque to form coating.
Comparative example 2
A kind of table painting slurry, the table apply slurry and are made of the raw material including following parts by weight: 5 parts of nano- γ-ALOOH, 0.15 part of dibutyl phthalate, 0.4 part of PVDF, 0.002 part of TM-6,0.002 part of polyethers, 0.002 part of polyacrylamide.
The table applies the coating method of slurry, includes the following steps:
(1) binder is uniformly dissolved in solvent NMP, nano- γ-ALOOH, clarifier, defoaming agent is added thereto It with dispersing agent, is stirred and is configured to slurry, the solid content of slurry is 20%, viscosity 100cp；
(2) slurry is uniformly coated on pole piece, coating speed 200m/min, progress vacuum and low temperature heating, vacuum degree≤- 0.090MPa, temperature are 60 DEG C, bubble in slurry are discharged all, and uniform levelling, then carry out vacuum infrared heating, are being lacked Oxygen condition dries rapidly NMP, and slurry is avoided to develop the color, and foil is avoided to aoxidize, temperature control at 180 DEG C, vacuum degree≤- 0.090MPa finally enters conventional ovens, is cooled down using dry cold wind, and cold wind temperature is maintained at 25 ± 5 DEG C, reduces PVDF crystallization Degree improves table and applies transparency, forms table coating layer.
A kind of pole piece, the pole piece outside are coated with the table and apply slurry, and agglomerated particle, pole piece occurs in pole piece It is opaque.
The pole piece that embodiment 1-3 is obtained is detected using SMN-G type densitometer, it is 50 that non-table, which applies pole piece gray scale, is taken without black Colorant area is only coated with table and applies slurry sheet test, gray scale 1730, therefore gray scale can accurately reflect table and apply coating level, to reflect The pole piece uniformity.
Corresponding pole piece table detects gray scale after applying, and using sem analysis thickness, data are as shown in table 1 and table 2.
The testing result of 1 gray scale of table
2 pole piece apparent condition of table
Case Pole piece apparent condition
Embodiment 1 Top coat surface is smooth, and in 3~5um thickness range, be translucent shape.
Embodiment 2 Top coat surface is smooth, and in 3~5um thickness range, be translucent shape.
Embodiment 3 Top coat surface is smooth, and in 3~5um thickness range, be translucent shape.
Comparative example 1 Top coat surface is smooth, opaque in 3~5um thickness range.
Comparative example 2 There is agglomerated particle substance on top coat surface, opaque in 3~5um thickness range.
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 Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of table applies slurry, it is characterised in that: the table applies slurry by including that the raw material of following parts by weight is made:
2. table according to claim 1 applies slurry, it is characterised in that: the binder is PVDF and phthalic acid two Butyl ester；The parts by weight of PVDF are 0.3-1 parts in the binder, and the parts by weight of dibutyl phthalate are 0.15-0.5 Part；The molecular weight of the PVDF is 40-60 ten thousand.
3. table according to claim 1 applies slurry, it is characterised in that: the clarifier is TM-6；The defoaming agent For polyethers；The dispersing agent is polyacrylamide.
4. table according to claim 1 applies slurry, it is characterised in that: the partial size of the nano- γ-ALOOH is 5- 10nm, straight-line luminous transmittance 90-95%.
5. the coating method that table of any of claims 1-4 applies slurry, characterized by the following steps:
(1) binder is uniformly dissolved in solvent, nano- γ-ALOOH, clarifier, defoaming agent and dispersion is added thereto Agent is stirred and is configured to slurry；
(2) slurry is uniformly coated on pole piece, carries out primary heating, bubble in slurry is discharged all, and uniform levelling, so Table coating layer is formed after carrying out reheating, dry cold wind cooling afterwards.
6. the coating method that table according to claim 5 applies slurry, it is characterised in that: the solvent in the step (1) For NMP；The solid content of slurry in the step (1) is 20-25%, viscosity 50-200cp.
7. the coating method that table according to claim 5 applies slurry, it is characterised in that: coating step in the step (2) Rapid speed is 100-200m/min.
8. the coating method that table according to claim 5 applies slurry, it is characterised in that: primary in the step (2) Heating stepses are vacuum and low temperature heating, and vacuum degree≤- 0.090MPa, temperature is 40-60 DEG C；It is secondary in the step (2) Heating stepses are vacuum infrared heating, and vacuum degree≤- 0.090MPa, temperature is 120-180 DEG C；It is dry in the step (2) The temperature of cold wind cooling step is 20-30 DEG C.
9. the coating method that table according to claim 5 applies slurry, it is characterised in that: the pole piece in the step (2) Color be black, the color of table coating layer is transparent or semitransparent；The table coating layer with a thickness of 3-5 μm.
10. a kind of pole piece, it is characterised in that: be coated with table of any of claims 1-4 on the outside of the pole piece and apply Slurry.
CN201910753833.8A 2019-08-15 2019-08-15 A kind of table applies slurry and its coating method Pending CN110484066A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1825666A (en) * 2005-12-23 2006-08-30 范亢俊 Lithium cell, safety diaphragm of lithium ion cell and mfg. method
CN107394113A (en) * 2017-06-07 2017-11-24 天津中科先进技术研究院有限公司 Surface coating for improving safety performance of power lithium ion battery, surface coating application and power lithium ion battery

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1825666A (en) * 2005-12-23 2006-08-30 范亢俊 Lithium cell, safety diaphragm of lithium ion cell and mfg. method
CN107394113A (en) * 2017-06-07 2017-11-24 天津中科先进技术研究院有限公司 Surface coating for improving safety performance of power lithium ion battery, surface coating application and power lithium ion battery

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Application publication date: 20191122