CN108586757A - A kind of battery diaphragm coating bonding agent and preparation method thereof - Google Patents
A kind of battery diaphragm coating bonding agent and preparation method thereof Download PDFInfo
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- CN108586757A CN108586757A CN201810368728.8A CN201810368728A CN108586757A CN 108586757 A CN108586757 A CN 108586757A CN 201810368728 A CN201810368728 A CN 201810368728A CN 108586757 A CN108586757 A CN 108586757A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/021—Block or graft polymers containing only sequences of polymers of C08C or C08F
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
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- 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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/26—Cellulose ethers
- C09D101/28—Alkyl ethers
- C09D101/286—Alkyl ethers substituted with acid radicals
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- 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
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- 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
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- 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
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2487/00—Characterised by the use of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
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- 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
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- 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
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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 battery diaphragm coating bonding agent and preparation method thereof, the bonding agent includes fluorine-containing polyolefin/hydrophilic high mol dendroid graft polymers；High molecular weight hydrophilic polymer is grafted on fluorine-containing polyolefin under the action of ultraviolet light by preparation method using photosensitizer, forms the dendritic with a large amount of hydrophilic radicals.The bonding agent is used for lithium battery ceramic diaphragm, can effectively inhibit falling off for ceramic powder, and effectively improve diaphragm imbibition/liquid-keeping property；After diaphragm is assembled into battery, battery has many advantages, such as that cycle performance is superior, ionic conductivity is high, high rate performance is excellent.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of battery diaphragm coating bonding agent and its preparations
Method.
Background technology
Diaphragm is the important composition component of lithium ion battery, and the performance of diaphragm determines the interfacial structure of battery, internal resistance etc.,
And the capacity, cycle performance and safety etc. for directly affecting battery.Ceramic diaphragm is developed on traditional polyalkene diaphragm
The modern high security diaphragm material come, the main preparation method of ceramic diaphragm is by inorganic particle (such as Al2O3、SiO2、TiO2
Deng), bonding agent etc. is dispersed in solvent, then forms ceramic painting in polyalkene diaphragm substrate surface by the tape casting or infusion process
Layer.The thermal contraction performance of ceramic diaphragm, to the imbibition rate of electrolyte, wellability and apply ceramic diaphragm lithium battery from
Electron conductivity, capacity is kept and high rate performance is influenced by inorganic particle, bonding agent and manufacture craft.
Include at present inorganic particle and its manufacture craft and bonding agent to the main direction of studying of ceramic diaphragm coating
It is prepared by modified and synthesis, such as a kind of lithium battery diaphragm coating boehmites announced of patent CN 106186008A and its hydro-thermal
Method, patent CN 103560219A disclose a kind of using poly-dopamine as the preparation method of the ceramic diaphragm of bonding agent.
Wherein, traditional bonding agent, such as Kynoar, Kynoar-hexafluoropropene, although possessing good machine
Tool performance, chemical resistance, cementability, but due to the hydrophobicity of itself, in diaphragm wellability, the chemical property side of battery
There is the space of promotion in face；Such as poly- polymethacrylic acid methyl ester bonding agent, though having certain absorbency, adhesive property is bad, holds
Falling off for diaphragm ceramic powders is easily led to, safety problem occurs so as to cause battery.Therefore, it certainly will need to existing bonding agent
It is modified processing.
Invention content
It is an object of the invention to：For existing cell ceramic diaphragm bonding agent hydrophily is poor, cementability is weak and causes
Ceramic diaphragm wellability is poor, the problems such as ceramic powders are easy to fall off, providing a kind of having high-hydrophilic, high adhesiveness, high electricity
Chemically stable battery diaphragm coating bonding agent and its preparation process.
To achieve the goals above, the present invention uses following technical scheme：
A kind of battery diaphragm coating bonding agent, the bonding agent include fluorine-containing polyolefin/hydrophilic high mol dendroid
Graft polymers.High molecular weight hydrophilic polymer is grafted to fluorine-containing polyolefin by the present invention using photosensitizer under the action of ultraviolet light
On, form the dendritic with a large amount of hydrophilic radicals.
Wherein, the preparation method of the battery diaphragm coating bonding agent, includes the following steps：
Step (1)：Prepare the mixed solution of fluorine-containing polyolefin, hydrophilic high mol, photosensitizer：By photosensitizer, fluorine-containing polyene
Hydrocarbon, hydrophilic high mol are by weight 0.3-0.5:50-80:80-100 is added in solvent, stirs 4~6 hours, solid content is made
For 10~20% mixed solution；
Step (2)：Prepare fluorine-containing polyolefin/hydrophilic graft polymer polymer solution：Mixing prepared by step (1) is molten
Liquid is placed in ultraviolet reactor, 20~40cm of luminous range, and 10~30min is irradiated in inert gas shielding atmosphere, is made
Fluorine-containing polyolefin/hydrophilic graft polymer polymer solution；
Step (3)：Fluorine-containing polyolefin/hydrophilic graft polymer polymer solution will be made in step (2), and to carry out spraying dry
It is dry, obtain battery diaphragm coating bonding agent.
Preferably, in step (1), the photosensitizer is at least one of benzophenone, diphenylethan.
Preferably, in step (1), the fluorine-containing polyolefin is the poly- inclined fluorine that weight average molecular weight is 150000~250000
Ethylene, at least one of Kynoar-hexafluoropropylene copolymer that weight average molecular weight is 200000~300000.
Preferably, in step (1), the hydrophilic high mol is the polypropylene that weight average molecular weight is 100000~150000
Acid, at least one of the polyacrylonitrile that weight average molecular weight is 80000~150000.
Preferably, in step (1), the solvent is n,N-Dimethylformamide (DMF), n,N-dimethylacetamide
(DMAC), at least one of 1-Methyl-2-Pyrrolidone (NMP).
Preferably, in step (2), the inert gas shielding atmosphere is helium atmosphere, argon gas atmosphere or nitrogen atmosphere.
Compared with the prior art, aryl ketones mixture such as benzophenone, diphenylethan, the xanthene that the present invention chooses
The photosensitizers such as ketone can capture the hydrogen of hydrogen donor after absorbing ultraviolet light, form two free radicals, so that different hydrogen donors is occurred anti-
It answers, forms graft polymers.To with C-H bond high molecular weight hydrophilic polymer polyacrylic acid, for polyacrylonitrile, photosensitive
Under the action of agent and ultraviolet light, then can with fluorine-containing polyolefin graft together with, form fluorine-containing polyolefin/hydrophilic graft polymer
Polymer, the polymer particles have dendritic structure, and periphery is the hydrophilic polymer chain containing a large amount of polar groups, like octopus
Tentacle, can be formed multiple spot bonding, not only have both the excellent chemical resistance of fluorine-containing polyolefin and cementability, but also improve bonding
The lyophily of agent.The bonding agent is used for lithium battery ceramic diaphragm, can effectively inhibit falling off for ceramic powder, and effectively improve
Diaphragm imbibition/liquid-keeping property；After diaphragm is assembled into battery, battery is with cycle performance is superior, ionic conductivity is high, high rate performance
The advantages that excellent.
Specific implementation mode
To keep technical scheme of the present invention and advantage clearer, below in conjunction with specific embodiment, to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and described embodiments are some of the embodiments of the present invention, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
By benzophenone, Kynoar, polyacrylic acid by weight 0.5:80:100 are added to N, N- dimethyl formyls
It in amine (DMF) solvent, persistently stirs 4 hours, the mixed solution that solid content is 10% is made；The mixed solution of preparation is placed in purple
In outer Photoreactor, luminous range 40cm irradiates 30min in nitrogen protection atmosphere, and fluorine-containing polyolefin/hydrophilic high mol is made
Graft polymer solution；Using spray drying, battery diaphragm coating bonding agent is made.
By bonding agent powder, alundum (Al2O3) nano-particle, carboxymethyl cellulose by weight 5:1:90 be added to it is water-soluble
In liquid, the mixed solution that solid content is 50% is made, mixes 1h under 20000 rotating speeds, obtains coating slurry.Using blade coating side
Slurry is applied to polypropylene diaphragm surface by formula, and the lithium battery ceramic diaphragm coating of 5 μ m-thicks is obtained after 70 DEG C of dryings, is fully infiltrated
LiPF6Electrolyte uses electrochemical workstation to test its surface lithium ion conductivity as 3.7 × 10-3Scm-1, coating adhesion is
49Nm-1；It is assembled into LiFePO4/ C lithium batteries.Its cycle performance is tested using electrochemical workstation, after 400 circle of cycle, still
Keep 94% initial discharge capacity.Sample as a comparison, by Kynoar, carboxymethyl cellulose, alundum (Al2O3) nano-particle
Slurry and coating are prepared according to same ratio, it is 5.7 × 10 to measure its surface lithium ion conductivity-4Scm-1, coating adhesion is
15Nm-1, after 400 circle of cycle, capacity retention ratio is only 79%.
Embodiment 2
By diphenylethan, Kynoar, polyacrylonitrile by weight 0.4:70:100 are added to N, N- dimethyl second
It in amide (DMAC) solvent, persistently stirs 5 hours, the mixed solution that solid content is 15% is made；The mixed solution of preparation is set
Enter in ultraviolet reactor, luminous range 20cm irradiates 20min in argon atmosphere, and fluorine-containing polyolefin/hydrophilic height is made
Molecule graft polymer solution；Using spray drying, battery diaphragm coating bonding agent is made.
By bonding agent powder, alundum (Al2O3) nano-particle, hydroxypropyl methyl cellulose by weight 5:2:90 are added to
In aqueous solution, the mixed solution that solid content is 45% is made, mixes 1h under 15000 rotating speeds, obtains coating slurry.Using scraping
Slurry is applied to polypropylene diaphragm surface by painting mode, the lithium battery ceramic diaphragm coating of 5 μ m-thicks is obtained after 60 DEG C of dryings, fully
Infiltrate LiPF6Electrolyte uses electrochemical workstation to test its surface lithium ion conductivity as 3.5 × 10-3Scm-1, coating attachment
Power is 43Nm-1；It is assembled into LiFePO4/ C lithium batteries.Its cycle performance is tested using electrochemical workstation, after 400 circle of cycle,
Still keep 92% initial discharge capacity.Sample as a comparison, by polymethyl methacrylate, hydroxypropyl methyl cellulose, three
Al 2 O nano-particle prepares slurry and coating according to same ratio, and it is 5.7 × 10 to measure its surface lithium ion conductivity- 4Scm-1, coating adhesion 13Nm-1, after 400 circle of cycle, capacity retention ratio is only 80%.
Embodiment 3
By benzophenone, Kynoar-hexafluoropropylene copolymer, polyacrylonitrile by weight 0.3:50:90 are added to
It in 1-Methyl-2-Pyrrolidone (NMP) solvent, persistently stirs 4 hours, the mixed solution that solid content is 17% is made；It will prepare
Mixed solution merging ultraviolet reactor in, luminous range 30cm irradiates 20min in helium protective atmosphere, be made it is fluorine-containing
Polyolefin/hydrophilic graft polymer polymer solution；Using spray drying, battery diaphragm coating bonding agent is made.
By bonding agent powder, titanium dioxide nano-particle, hydroxypropyl methyl cellulose by weight 6:2:90 are added to water
In solution, the mixed solution that solid content is 45% is made, mixes 2h under 20000 rotating speeds, obtains coating slurry.Using blade coating
Slurry is applied to polypropylene diaphragm surface by mode, and the lithium battery ceramic diaphragm coating of 5 μ m-thicks is obtained after 80 DEG C of dryings, is fully soaked
Moisten LiPF6Electrolyte uses electrochemical workstation to test its surface lithium ion conductivity as 3.2 × 10-3Scm-1, coating adhesion
For 57Nm-1；It is assembled into LiFePO4/ C lithium batteries.Its cycle performance is tested using electrochemical workstation, after 400 circle of cycle, according to
The initial discharge capacity of old holding 91%；Sample as a comparison, Kynoar-hexafluoropropylene copolymer, hydroxypropyl methyl is fine
Dimension element, titanium dioxide nano-particle prepare slurry and coating according to same ratio, measure its surface lithium ion conductivity be 4.1 ×
10-4Scm-1, coating adhesion 18Nm-1, after 400 circle of cycle, capacity retention ratio is only 78%.
Embodiment 4
By diphenylethan, Kynoar-hexafluoropropylene copolymer, polyacrylic acid by weight 0.4:70:90 are added
It into n,N-Dimethylformamide (DMF) solvent, persistently stirs 5 hours, the mixed solution that solid content is 16% is made；It will prepare
Mixed solution merging ultraviolet reactor in, luminous range 25cm irradiates 35min in nitrogen protection atmosphere, be made it is fluorine-containing
Polyolefin/hydrophilic graft polymer polymer solution；Using spray drying, battery diaphragm coating bonding agent is made.
By bonding agent powder, titanium dioxide nano-particle, hydroxypropyl methyl cellulose by weight 5:3:90 are added to water
In solution, the mixed solution that solid content is 46% is made, mixes 2.5h under 15000 rotating speeds, obtains coating slurry.Using scraping
Slurry is applied to polypropylene diaphragm surface by painting mode, the lithium battery ceramic diaphragm coating of 5 μ m-thicks is obtained after 70 DEG C of dryings, fully
Infiltrate LiPF6Electrolyte uses electrochemical workstation to test its surface lithium ion conductivity as 3.6 × 10-3Scm-1, coating attachment
Power 47Nm-1；It is assembled into LiFePO4/ C lithium batteries.Its cycle performance is tested using electrochemical workstation, after 400 circle of cycle, according to
The initial discharge capacity of old holding 92%；Sample as a comparison, by polymethyl methacrylate, hydroxypropyl methyl cellulose, dioxy
Change titanium nano-particle and prepare slurry and coating according to same ratio, it is 5.1 × 10 to measure its surface lithium ion conductivity-4Scm-1,
Coating adhesion is 20Nm-1, after 400 circle of cycle, capacity retention ratio is only 78%.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed.Therefore, the invention is not limited in above-mentioned specific implementation mode, every those skilled in the art exist
Made any conspicuously improved, replacement or modification all belongs to the scope of protection of the present invention on the basis of the present invention.This
Outside, although having used some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (7)
1. a kind of battery diaphragm coating bonding agent, it is characterised in that：The bonding agent includes fluorine-containing polyolefin/hydrophilic high score
The dendritic graft polymers of subtree.
2. a kind of preparation method of battery diaphragm coating bonding agent according to claim 1, which is characterized in that including with
Lower step：
Step (1)：Prepare the mixed solution of fluorine-containing polyolefin, hydrophilic high mol, photosensitizer：By photosensitizer, fluorine-containing polyolefin, parent
Water macromolecule is by weight 0.3-0.5:50-80:80-100 is added in solvent, is stirred 4~6 hours, and it is 10 that solid content, which is made,
~20% mixed solution；
Step (2)：Prepare fluorine-containing polyolefin/hydrophilic graft polymer polymer solution：Mixed solution prepared by step (1) is set
Enter in ultraviolet reactor, 20~40cm of luminous range, 10~30min is irradiated in inert gas shielding atmosphere, is made fluorine-containing
Polyolefin/hydrophilic graft polymer polymer solution；
Step (3)：It is spray-dried fluorine-containing polyolefin/hydrophilic graft polymer polymer solution is made in step (2), i.e.,
Battery diaphragm coating bonding agent is made.
3. the preparation method of battery diaphragm coating bonding agent according to claim 2, it is characterised in that：In step (1),
The photosensitizer is at least one of benzophenone, diphenylethan, xanthone.
4. the preparation method of battery diaphragm coating bonding agent according to claim 2, it is characterised in that：In step (1),
The fluorine-containing polyolefin be weight average molecular weight be 150000~250000 Kynoar, weight average molecular weight be 200000~
At least one of 300000 Kynoar-hexafluoropropylene copolymer.
5. the preparation method of battery diaphragm coating bonding agent according to claim 2, it is characterised in that：In step (1),
The hydrophilic high mol be weight average molecular weight be 100000~150000 polyacrylic acid, weight average molecular weight be 80000~
At least one of 150000 polyacrylonitrile.
6. the preparation method of battery diaphragm coating bonding agent according to claim 2, it is characterised in that：In step (1),
The solvent is N,N-dimethylformamide (DMF), DMAC N,N' dimethyl acetamide (DMAC), 1-Methyl-2-Pyrrolidone
At least one of (NMP).
7. the preparation method of battery diaphragm coating bonding agent according to claim 2, it is characterised in that：In step (2),
The inert gas shielding atmosphere is helium atmosphere, argon gas atmosphere or nitrogen atmosphere.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725494A (en) * | 2020-06-30 | 2020-09-29 | 蜂巢能源科技有限公司 | Lithium material, lithium-containing material dispersion liquid, electrode material, and preparation methods and applications thereof |
| CN113555645A (en) * | 2021-06-01 | 2021-10-26 | 惠州锂威新能源科技有限公司 | Modified diaphragm, lithium ion battery and power consumption device |
| WO2022262778A1 (en) * | 2021-06-16 | 2022-12-22 | 深圳市星源材质科技股份有限公司 | Coating slurry, coated separator and preparation method therefor |
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| CN1851957A (en) * | 2006-04-26 | 2006-10-25 | 北京大学 | Polymer composite diaphragm and its preparing method |
| JP2013122009A (en) * | 2011-12-12 | 2013-06-20 | Murata Mfg Co Ltd | Fluororesin adhesive, separator for electric storage device using the same, insulating adhesive layer, and electric storage device |
| KR20140055801A (en) * | 2012-11-01 | 2014-05-09 | 주식회사 엘지화학 | Separator for electrochemical cell and method for preparing the same |
| KR20140062295A (en) * | 2012-11-14 | 2014-05-23 | 주식회사 엘지화학 | Separator comprising patterned porous coating layer, and preparation method thereof |
| CN103956450A (en) * | 2014-05-16 | 2014-07-30 | 中国东方电气集团有限公司 | Composite membrane for lithium ion batteries and preparation method thereof |
| CN105206777A (en) * | 2015-10-26 | 2015-12-30 | 武汉惠强新能源材料科技有限公司 | Lithium battery diaphragm containing porous inorganic oxide capable of conducting lithium ions, and preparation method thereof |
| CN107039624A (en) * | 2017-04-07 | 2017-08-11 | 东莞市魔方新能源科技有限公司 | A kind of lithium ion battery and its barrier film |
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| CN111725494A (en) * | 2020-06-30 | 2020-09-29 | 蜂巢能源科技有限公司 | Lithium material, lithium-containing material dispersion liquid, electrode material, and preparation methods and applications thereof |
| CN113555645A (en) * | 2021-06-01 | 2021-10-26 | 惠州锂威新能源科技有限公司 | Modified diaphragm, lithium ion battery and power consumption device |
| CN113555645B (en) * | 2021-06-01 | 2023-09-05 | 惠州锂威新能源科技有限公司 | Modified diaphragm, lithium ion battery and power utilization device |
| WO2022262778A1 (en) * | 2021-06-16 | 2022-12-22 | 深圳市星源材质科技股份有限公司 | Coating slurry, coated separator and preparation method therefor |
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