CN109037555A - Lithium ion battery isolation film and preparation method thereof - Google Patents
Lithium ion battery isolation film and preparation method thereof Download PDFInfo
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- CN109037555A CN109037555A CN201810714735.9A CN201810714735A CN109037555A CN 109037555 A CN109037555 A CN 109037555A CN 201810714735 A CN201810714735 A CN 201810714735A CN 109037555 A CN109037555 A CN 109037555A
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- polymer
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- ion battery
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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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- 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
- 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
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention provides a kind of lithium ion battery isolation film, comprising: porous substrate and the polymer coating for being coated on a porous substrate at least side surface；The material of polymer includes at least one of the group being made of polyacrylic acid, polymethylacrylic acid, polymethyl acrylate, polyethyl acrylate, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, polyester, polysulfones, polyacrylonitrile.Polymer bonding performance of the invention is good, while polymer coating thickness obtained is thin, uniform and distribution is continuous, can be improved the cementability between porous substrate, inorganic matter coating and positive/negative plate, and then improve the hardness of battery；In addition, there is a large amount of micropore, while polymer beads are swollen smaller, cyclicity of the isolation film that can guarantee with preferable gas permeability and battery in the electrolytic solution between polymer beads.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of lithium ion battery isolation film and its preparation side
Method.
Background technique
Lithium ion battery is usually mainly made of anode, cathode, isolation film, electrolyte, battery case.Lithium ion battery knot
In structure, isolation film is crucial one of interior layer assembly.Lithium ion battery isolation film is as one of lithium ion battery critical material
The material for connecting and separating battery plus-negative plate is the insulator of electronics, can prevent short circuit, but lithium ion is allowed to pass through,
The electric current conduction in battery can also be obstructed by closed pore function when battery is overheated.Currently, as power vehicle is being lived
In extensive use, due to the appearance of the series-parallel battery pack of larger amt, the security performance of lithium ion battery is concerned, and lithium
Requirement of the isolation film to the safety of battery in ion battery as partition positive and negative pole material is then higher and higher, is especially isolated
The high temperature resistance of film and with positive and negative anodes interfacial contact performance.In addition, the cycle performance of lithium ion battery is also concerned, property
The good isolation film of energy can allow the significant cyclic number of battery to increase many.
When power vehicle is in movement or stopping, since the quantity of string and/or batteries in parallel connection group is larger, production is inevitably had
The trend of raw displacement will lead to and move between battery if the adhesive strength of isolation film is bad, or even dislocation, Jin Eryin
Play the generation of the contingencies such as cells burst, explosion.If it is bigger that the swelling of film coating materials in the electrolytic solution is isolated, can lead
The conducting power decline of lithium ion between positive and negative anodes in pond is sent a telegraph, the internal resistance of cell is larger, and cycle performance of battery is deteriorated.
Adhesive strength with higher is answered in order to meet raising battery security and circulative requirement, isolation film, is isolated
Film coating materials should have lower swellability, use the isolation film of polyolefin-based microporous membrane material merely, or even merely make
It is applied to formation composite membrane on polymer microporous film with common inorganic material to be difficult to meet the requirements, therefore, using functional material
It is compound with polyolefin-based microporous membrane material, it is the Main way of current isolation membrane modifying, can be further improved the peace of isolation film
Full performance and cycle performance.
About functional material and the compound technology of polyolefin-based microporous membrane material, having many patent documents had introduction.
For example, patent document (publication No. CN105845872A), patent document (publication No. CN105428727A) and patent document (are announced
Number CN106356487A) etc. all using functional material and the compound technology of polyolefin-based microporous membrane material, polymer coating is
Aqueous coating.Being previously mentioned in these documents includes following several for manufacturing the material of battery isolating film:
1, isolation film: polyethylene film (PE), polypropylene screen (PP), ceramic isolation film or three layers of isolation film (PP- is supported
PE-PP one of which).
2, polymer coating: fluorine-containing polypropylene, tetrapropanate fluorine rubber, polyvinyl butyral, epoxy resin, butadiene-styrene rubber,
Polysulfones, polytetrafluoroethylene (PTFE), Kynoar (PVDF), carboxymethyl cellulose, acrylonitrile multipolymer, in acylamide polymer
It is one or more.
3, inorganic particle: titanium dioxide, magnesia, aluminium oxide, boehmite, silica, zirconium oxide, calcium oxide, oxidation
One of zinc is a variety of.
Although existing isolation film can meet the basic demand of cell safety, adhesive strength is not special height,
In power vehicle, adhesive strength just seems not outstanding enough in multi-layer cell pressing, and the adhesive property of current isolation film cannot be protected
The very little that card multi-layer cell occurs in motor racing is mobile even to unshift.The relatively high composite membrane of some adhesive strengths,
Used polymer has biggish swelling in the electrolytic solution, and the cycle performance that will lead to lithium ion battery is deteriorated.
In view of the above problems, a kind of higher it is necessary to study adhesive strength and low swellability lithium ion battery isolation film and
Preparation method.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of lithium ion battery isolation film and
Preparation method cannot reach high adhesive strength and low molten for solving lithium ion battery isolation film in the prior art simultaneously
The problem of swollen property.
In order to achieve the above objects and other related objects, the present invention provides a kind of lithium ion battery isolation film, the lithium from
Sub- battery isolating film includes porous substrate and the polymer coating for being coated on a porous substrate at least side surface, described poly-
Object coating is closed to be configured to polymer paste via polymer, solvent and auxiliary agent and be coated with, dry；
The material of the polymer includes by polyacrylic acid, polymethylacrylic acid, polymethyl acrylate, polyacrylic acid second
It is ester, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, poly-
At least one of ester, polysulfones, the group of polyacrylonitrile composition；
It is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is between 10~85 parts, institute
The weight of solvent is stated between 10~85 parts, the weight of the auxiliary agent is between 0.01~10 part.
Preferably, the structure of the polymer includes core-shell structure or spherical structure.
Preferably, the diameter of the polymer is between 0.01 μm -10 μm.
Preferably, the thickness of the polymer coating is between 0.1 μm -10 μm.
Preferably, the average molecular weight of the polymer is between 100,000~500,000.
Preferably, the swelling ratio of the polymer is between 10%~150%.
Preferably, the porous substrate includes porous basement membrane and is coated on the inorganic of a porous basement membrane at least side surface
Object coating.
Further, the porous substrate further includes binder, and the inorganic matter coating is bonded to by the binder
On the porous basement membrane, the material of the binder include by polyacrylate, polymethacrylates, polymethyl acrylate,
Polyethyl acrylate, pure-acrylic emulsion, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE) composition
At least one of group, the material of the inorganic matter coating include by aluminium oxide, boehmite, silica, titanium dioxide,
Ceria, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, phosphorus
At least one of sour titanium aluminium lithium, the group of lithium nitride composition.
Preferably, the solvent includes deionized water, and the auxiliary agent includes by polyvinyl alcohol, polyethylene glycol, Isosorbide-5-Nitrae-fourth two
Alcohol, polyethers, methanol, ethyl alcohol, stearic acid, neopelex, quaternary ammonium compound lecithin, amino acid pattern, betaine type rouge
At least one of fatty acid glyceride, fatty acid sorbitan (sapn), the group of polysorbate (tween) composition.
The present invention also provides a kind of preparation methods of lithium ion battery isolation film, are used to prepare above-mentioned lithium ion battery isolation
Film, the preparation method include:
1) polymer, solvent and auxiliary agent are uniformly mixed and obtain polymer paste, the material of the polymer includes by gathering
Acrylic acid, polymethylacrylic acid, polymethyl acrylate, polyethyl acrylate, polyacrylic acid-styrol copolymer, neopentyl glycol
In the group that diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, polyester, polysulfones, polyacrylonitrile form extremely
Few one kind, is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is between 10~85 parts, institute
The weight of solvent is stated between 10~85 parts, the weight of the auxiliary agent is between 0.01~10 part；
2) porous substrate is provided, the polymer paste is coated on to an at least side surface for the porous substrate；
3) polymer paste after coating is dried, obtains lithium ion battery isolation film.
Preferably, in step 1), the polymer, the solvent and the auxiliary agent are mixed by the way of stirring.
Preferably, in step 2), the mode of the coating includes being applied by dip coated, intaglio plate coating, silk-screen printing, transfer
Cloth, extrusion coated, spraying coating and cast coat composition one of group, the speed of the coating between 1m/min~
Between 300m/min.
Preferably, in step 3), described be dried includes drying, and drying temperature is between 25 DEG C~130 DEG C.
Preferably, the solvent includes deionized water, and the auxiliary agent includes by polyvinyl alcohol, polyethylene glycol, Isosorbide-5-Nitrae-fourth two
Alcohol, polyethers, methanol, ethyl alcohol, stearic acid, neopelex, quaternary ammonium compound lecithin, amino acid pattern, betaine type rouge
At least one of fatty acid glyceride, fatty acid sorbitan (sapn), the group of polysorbate (tween) composition.
Preferably, the porous substrate includes porous basement membrane and is coated on the inorganic of a porous basement membrane at least side surface
Object coating.
Further, the porous substrate further includes binder, and the inorganic matter coating is bonded to by the binder
On the porous basement membrane, the material of the binder include by polyacrylate, polymethacrylates, polymethyl acrylate,
Polyethyl acrylate, pure-acrylic emulsion, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE) composition
At least one of group, the material of the inorganic matter coating include by aluminium oxide, boehmite, silica, titanium dioxide,
Ceria, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, phosphorus
At least one of sour titanium aluminium lithium, the group of lithium nitride composition.
As described above, lithium ion battery isolation film and preparation method thereof of the invention, has the advantages that
1, the adhesive property of the polymer provided by the invention is good, at the same the polymer coating thickness obtained it is thin,
Uniformly and distribution is continuous, therefore can be improved bonding between polymer coating and porous substrate, inorganic matter coating and positive/negative plate
Property, and then improve the hardness of battery.
2, the polymer coating provided by the invention has a large amount of micropore between the polymer beads, meanwhile,
The polymer beads are swollen smaller in the electrolytic solution, and the isolation film that can guarantee has preferable gas permeability and battery
Cyclicity.
3, the electrochemical appliance of the isolation film preparation of the invention, due to using with outstanding cementability, breathing freely
The isolation film of property, lithium-ion-conducting, thermal stability and mechanical strength, therefore chemical property, security performance and circulating battery
Performance etc. is greatly improved, and effectively overcomes the defect of the prior art, has good industrial prospect.
Detailed description of the invention
Fig. 1 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein and porous substrate includes porous basement membrane,
Polymer coating is coated on a side surface of porous basement membrane.
Fig. 2 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein and porous substrate includes porous basement membrane,
Polymer coating is coated on two side surfaces of porous basement membrane.
Fig. 3 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein porous substrate include porous basement membrane and
It is coated on the inorganic matter coating of porous one side surface of basement membrane, polymer coating is coated on the surface of inorganic matter coating.
Fig. 4 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein porous substrate include porous basement membrane and
It is coated on the inorganic matter coating of porous one side surface of basement membrane, polymer coating is coated on the surface of the porous basement membrane of the other side.
Fig. 5 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein porous substrate include porous basement membrane and
It is coated on the inorganic matter coating of porous one side surface of basement membrane, polymer coating is coated on the both side surface of porous substrate.
Fig. 6 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein porous substrate include porous basement membrane and
It is coated on the inorganic matter coating of porous basement membrane both side surface, polymer coating is coated on the surface of side inorganic matter coating.
Fig. 7 is shown as the schematic diagram of lithium ion battery isolation film of the invention, wherein porous substrate include porous basement membrane and
It is coated on the inorganic matter coating of porous basement membrane both side surface, polymer coating is coated on the surface of two sides inorganic matter coating.
Fig. 8 is shown as the preparation method flow diagram of lithium ion battery isolation film of the invention.
Component label instructions
1 porous basement membrane
2 polymer coatings
3 inorganic matter coatings
S1~S3 step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Please refer to FIG. 1 to FIG. 8.It should be noted that diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, only shown in schema then with related component in the present invention rather than package count when according to actual implementation
Mesh, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its
Assembly layout kenel may also be increasingly complex.
As shown in FIG. 1 to FIG. 7, the present invention provides a kind of lithium ion battery isolation film, the lithium ion battery isolation film packet
It includes porous substrate and is coated on the polymer coating 2 of a porous substrate at least side surface, the polymer coating 2 is via poly-
Object, solvent and auxiliary agent is closed to be configured to polymer paste and be coated with, dry；
The material of the polymer includes by polyacrylic acid, polymethylacrylic acid, polymethyl acrylate, polyacrylic acid second
It is ester, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, poly-
At least one of ester, polysulfones, the group of polyacrylonitrile composition；
It is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is between 10~85 parts, institute
The weight of solvent is stated between 10~85 parts, the weight of the auxiliary agent is between 0.01~10 part.
As an example, the porous substrate can only include porous basement membrane, in addition, the porous substrate can also be by described
Porous basement membrane and the inorganic matter coating for being coated on a porous basement membrane at least side surface are formed.Preferably, the porous basement membrane
Material select polyolefine material.
Specifically, as shown in FIG. 1 to FIG. 2, the porous substrate only includes porous basement membrane 1, wherein as shown in Figure 1, described
Lithium ion battery isolation film includes the porous basement membrane 1 and the polymer painting for being coated on 1 one side surface of porous basement membrane
Layer 2, as shown in Fig. 2, the lithium ion battery isolation film includes the porous basement membrane 1 and is coated on 1 two sides of porous basement membrane
The polymer coating 2 on surface；As shown in Fig. 3~Fig. 5, the porous substrate includes the porous basement membrane 1 and is coated on institute
State the inorganic matter coating 3 of porous 1 one side surface of basement membrane, wherein as shown in figure 3, the lithium ion battery isolation film includes described
Porous basement membrane 1, the inorganic matter coating 3 for being coated on 1 one side surface of porous basement membrane and it is coated on the inorganic matter coating 3
The polymer coating 2 on surface, as shown in figure 4, the lithium ion battery isolation film includes the porous basement membrane 1, is coated on
The inorganic matter coating 3 of 1 one side surface of porous basement membrane and it is coated on the described poly- of another side surface of the porous basement membrane 1
Object coating 2 is closed, as shown in figure 5, the lithium ion battery isolation film includes the porous basement membrane 1, is coated on the porous basement membrane 1
The inorganic matter coating 3 of one side surface and the polymer coating 2 for being coated on the porous substrate both side surface, i.e., it is described
Polymer coating 2 is respectively coated on 3 surface of inorganic matter coating and another side surface of the porous basement membrane 1；Such as Fig. 6~Fig. 7
Shown, the porous substrate includes the porous basement membrane 1 and the inorganic matter coating 3 for being coated on 1 both side surface of porous basement membrane,
Wherein, as shown in fig. 6, the lithium ion battery isolation film includes the porous basement membrane 1, is coated on 1 two sides of porous basement membrane
The inorganic matter coating 3 on surface and the polymer coating 2 for being coated on 3 surface of inorganic matter coating described in side, such as Fig. 7 institute
Show, the lithium ion battery isolation film includes the porous basement membrane 1, the nothing for being coated on 1 both side surface of porous basement membrane
Machine object coating 3 and the polymer coating 2 for being coated on 3 surface of inorganic matter coating described in two sides.
Have between the particle for the polymer coating 2 that the polymer material of the invention is formed after being coated with, drying big
The micropore of amount, while swelling ratio very little of the polymer coating in battery electrolyte, it is possible to effectively improve lithium ion
Conductibility and battery cycle performance；Meanwhile the viscosity of the polymer is stronger, and the viscous of lithium ion battery isolation film can be improved
Knotting strength；In addition, the particle of the polymer is small, the thickness of the polymer coating 2 can effectively reduce, improve polymer coating
2 uniformity, to further make ion lithium battery isolation membrane that there is excellent interfacial bond property, mechanical performance, thermostabilization
Property and oxidation resistance, guarantee ion lithium battery isolation membrane in later period battery process between pole piece formed caking property very
The security performance and hardness of battery are improved in strong interface.
Preferably, the material of the polymer includes by polymethyl acrylate, polyethyl acrylate, two propylene of neopentyl glycol
At least one of the group of acid esters and polyester composition.
Preferably, the structure of the polymer includes core-shell structure or spherical structure.
Preferably, the diameter of the polymer is between 0.01 μm -10 μm, more preferably, between 0.2 μm -2 μm.
Preferably, the thickness of the polymer coating 2 is between 0.1 μm -10 μm, more preferably, between 0.3 μm -5 μm.
Preferably, the average molecular weight of the polymer is between 100,000~500,000.
As an example, the swelling ratio of the polymer is between 10%~150%, it is preferable that between 20%~90%
Between, more preferably, between 30%~65%.
As an example, the porous substrate further includes binder, the inorganic matter coating 3 is bonded to by the binder
On the porous basement membrane 1, the material of the binder include by polyacrylate, polymethacrylates, polymethyl acrylate,
Polyethyl acrylate, pure-acrylic emulsion, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE) composition
At least one of group, the material of the inorganic matter coating 3 includes by aluminium oxide, boehmite, silica, titanium dioxide
Titanium, ceria, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium,
At least one of titanium phosphate aluminium lithium, the group of lithium nitride composition.
As an example, the solvent includes deionized water, the auxiliary agent includes by polyvinyl alcohol, polyethylene glycol, Isosorbide-5-Nitrae-fourth
Glycol, polyethers, methanol, ethyl alcohol, stearic acid, neopelex, quaternary ammonium compound lecithin, amino acid pattern, betaine type
At least one of fatty glyceride, fatty acid sorbitan (sapn), the group of polysorbate (tween) composition.It is preferred that described
The material of porous basement membrane 1 includes polyolefine material, is not infiltrated mutually with deionized water, and manufacturing cost and environmental pollution are being reduced
Polymer coating can be reduced to a greater degree to the plug-hole risk of porous basement membrane 1 simultaneously.
As shown in figure 8, utilizing the preparation side the present invention also provides a kind of preparation method of lithium ion battery isolation film
Method, can prepare above-mentioned lithium ion battery isolation film, and the preparation method includes:
Polymer, solvent and auxiliary agent are uniformly mixed and obtain polymer paste by S1, and the material of the polymer includes by gathering
Acrylic acid, polymethylacrylic acid, polymethyl acrylate, polyethyl acrylate, polyacrylic acid-styrol copolymer, neopentyl glycol
In the group that diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, polyester, polysulfones, polyacrylonitrile form extremely
Few one kind, is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is between 10~85 parts, institute
The weight of solvent is stated between 10~85 parts, the weight of the auxiliary agent is between 0.01~10 part；
S2 provides porous substrate, and the polymer paste is coated on to an at least side surface for the porous substrate；
S3 is dried the polymer paste after coating, obtains lithium ion battery isolation film.
In step S1, when the polymer and the auxiliary agent are mixed with the solvent, addition sequence is unrestricted.In one kind
It is preferably carried out in mode, first the auxiliary agent is added in the polymer and is stirred, the auxiliary agent is made to be dispersed in institute
It states in polymer, the solvent is then added and is stirred, to obtain the institute of the low swelling of high-adhesion with certain consistency
State polymer paste.
Preferably, the weight of the polymer is between 70~85 parts, it is highly preferred that between 80~85 parts.
Preferably, the weight of the solvent is between 60~85 parts.
Preferably, the weight of the auxiliary agent is between 0.1~10 part.
As an example, mixing the polymer, the solvent and the auxiliary agent by the way of stirring in step S1.It is excellent
Selection of land, the agitating mode can be kneading or mechanical stirring.
As an example, the mode of the coating includes by dip coated, intaglio plate coating, silk-screen printing, transfer in step S2
Coating, extrusion coated, spraying coating and cast coat composition one of group, the speed of the coating between 1m/min~
Between 300m/min.
As an example, described be dried includes drying, and drying temperature is between 25 DEG C~130 DEG C in step S3.It is excellent
Selection of land, can carry out the drying process using multistage baking oven, and the temperature of baking oven is set as the temperature of two sections of head and the tail lower than centre
The temperature of section.
As an example, the solvent includes deionized water, the auxiliary agent includes by polyvinyl alcohol, polyethylene glycol, Isosorbide-5-Nitrae-fourth
Glycol, polyethers, methanol, ethyl alcohol, stearic acid, neopelex, quaternary ammonium compound lecithin, amino acid pattern, betaine type
At least one of fatty glyceride, fatty acid sorbitan (sapn), the group of polysorbate (tween) composition.
As an example, the porous substrate includes porous basement membrane and the nothing for being coated on a porous basement membrane at least side surface
Machine object coating.
Preferably, the porous substrate further includes binder, the inorganic matter coating is bonded to institute by the binder
It states on porous basement membrane, the material of the binder includes by polyacrylate, polymethacrylates, polymethyl acrylate, gathers
Ethyl acrylate, pure-acrylic emulsion, polyacrylic acid-styrol copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE) form
At least one of group, the material of the inorganic matter coating include by aluminium oxide, boehmite, silica, titanium dioxide, two
Cerium oxide, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, phosphoric acid
At least one of titanium aluminium lithium, the group of lithium nitride composition.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise all percentage, ratio, ratio or number is pressed
Poidometer.The unit in percent weight in volume in the present invention is well-known to those skilled in the art, such as is referred to 100
The weight of solute in the solution of milliliter.Unless otherwise defined, all professional and scientific terms as used herein and this field are ripe
It is identical to practice meaning known to personnel.In addition, any method similar to or equal to what is recorded and material all can be applied to
In the method for the present invention.The preferred methods and materials described herein are for illustrative purposes only.
Raw material used in specific embodiment is specific as follows:
Aluminium oxide (VK-L30D) is purchased from Hangzhou Wanjing New Material Co., Ltd..
Boehmite (JRB-02) is purchased from Shandong Ji Run nanometers of new material Co., Ltd.
Polyacrylate adhesive (BJ03) is purchased from upper ocean fish child Industrial Co., Ltd..
Graphite (G-72BG) is purchased from Qingdao Rui Sheng graphite Co., Ltd.
SBR emulsion (BENNO-1.0) is purchased from the happy Industrial Co., Ltd. of Shenzhen town-brand.
The specific test method is as follows used in specific embodiment:
1, thickness
Using Marl, Germany THICKNESS GAUGE FOR THE MEASUREMENT OF THIN FOILS 1216 according to the measurement side of GB/T6672-2001 plastic film and sheet thickness
Method
Measurement.
2, adhesive strength
It is measured using Jinan match at the XLW-PC Intelligent electronic tensil testing machine of instrument.Take film surface integral outer appearance without exception
Isolation film, being punched into width is 25mm, and length is the sample of 100mm, takes two isolation membrane samples being punched stacked together,
With 1MPa pressure on hot press, 100 DEG C of temperature, the condition hot pressing of speed 1m/min, and test two with puller system and be bonded in one
The pulling force of isolation film is played, adhesion strength unit is gf/25mm.
Comparative example 1
It chooses using the porous basement membrane conduct of polyethylene (PE) made from Thermal inactive (TIPS) method, asynchronous double drawing process
Lithium ion battery isolation film, with a thickness of 11 μm.
Embodiment 2
By the polymer paste using plate gravure coating method one side coating to the porous basement membrane of PE identical with comparative example 1
On, and eventually pass through baking oven baking, the polymer coating of formation with a thickness of 0.5 μm, it is poly- that the low swelling of high viscosity can be made
The lithium ion battery isolation film that object coating and the porous basement membrane of PE are formed is closed, overall thickness is 11.5 μm.
Comparative example 2
It chooses using the porous basement membrane of PE made from Thermal inactive (TIPS) method, asynchronous double drawing process, with a thickness of 9 μm,
The inorganic matter coating (material is aluminium oxide or boehmite) is coated on the side of the porous basement membrane of PE using plate gravure coating method
Surface, and eventually pass through baking oven baking, the ceramic coating of formation with a thickness of 3 μm, ceramic coating and the porous basement membrane of PE can be made
The lithium ion battery isolation film of formation, overall thickness are 12 μm.
Embodiment 2
The polymer paste is coated on the another of the porous basement membrane identical with comparative example 2 using plate gravure coating method
One side surface, and eventually pass through baking oven toast the polymer coating to be formed with a thickness of 0.5 μm, it is low molten that high viscosity can be made
The lithium ion battery isolation film that swollen polymer coating and PE micropore basal membrane are formed, overall thickness are 12.5 μm.
Comparative example 3
Plate gravure coating method is used to be coated in the high swollen polymer slurry of high viscosity identical with comparative example 2 described porous
The both side surface of substrate, and eventually pass through baking oven toast the high swollen polymer coating of the high viscosity to be formed with a thickness of 0.5 μm, can
The lithium ion battery isolation film that the high swollen polymer coating of high viscosity and PE micropore basal membrane are formed is made, overall thickness is 13 μm.
Embodiment 3
The polymer paste is coated on the two of the porous substrate identical with comparative example 2 using plate gravure coating method
Side surface, and eventually pass through baking oven toast the polymer coating to be formed with a thickness of 0.5 μm, can be made high viscosity height swelling
The lithium ion battery isolation film that polymer coating and PE micropore basal membrane are formed, overall thickness are 13 μm.
The adhesion strength of the comparative example 1-3 and embodiment 1-3 lithium ion battery isolation film formed is tested, such as table 1
It is shown:
Table 1
It is remarkably improved after being coated on isolation film it can be seen from the above experimental result using high-viscosity polymer slurry
The adhesive property of isolation film coats high viscosity slurry on ceramic coating face in the effect ratio of porous coating on base films highly viscous slurry
The effect of material is better, in addition, the bonding of isolation film prepared by the low swollen polymer slurry of high viscosity used in the present invention
The adhesive property of isolation film prepared by performance swollen polymer slurry higher than existing high viscosity is much higher, so significantly changing
It has been apt to the adhesive property of lithium ion battery isolation film, has improved the security performance of battery.
Next lithium ion is further prepared using the lithium ion battery isolation film that embodiment 3 and comparative example 3 prepare
Battery.
Lithium ion battery is made of positive system, cathode system, electrolyte system, wherein anode uses LiMn2O4, cathode
Using graphite, for electrolyte using EC/EMC system, lithium salts (LiPF6) concentration is 1mol/L.Preparation section: anode is by mangaic acid
Lithium composition, cathode are made of graphite, carboxymethyl cellulose (CMC), SBR emulsion by 100:2:3 weight ratio, and cathode uses
Water is solvent, negative electrode slurry is made, isolation film is using isolation film shown in table 2.Plastic-aluminum is used after the pole piece cut is crimped
Film packaging, is added organic electrolyte in the state of nitrogen, by battery vacuum-pumping and encapsulates, then after battery room temperature ageing 3h,
Both it is shaped to lithium ion battery.
Table 2
Wherein, high rate performance is tested: will stand lithium ion battery for 24 hours in BTS-5V200A type (Shenzhen production) battery performance
It is tested on detecting box, according to testing requirement, in different multiplying power dischargings.
Cycle performance: lithium ion battery is at 20 DEG C, with 0.5C electric current constant-current charge, until voltage reaches 4.2V, cut-off electricity
0.03C is flowed, electricity shelves 15min, and lithium ion battery at 20 °C, can when charge and discharge are converted with 5C constant-current discharge to 3.0V
To shelve 30min, amounts to circulation and carry out 800 times, test loop capacity.
Vibration: it after battery charging, is fastened in vibration test stand, is tested by following conditions: a) direction of vibration: above being placed an order
Vibration；B) vibration frequency: 10Hz~50Hz；C) peak acceleration 30m/s2；D) time of vibration 2h；E) electric discharge is with 1C current discharge
2.5V, which is dropped to, to lithium ion battery battery pressure stops electric discharge.Do not allow the sharp change of discharge current, electric voltage exception, battery case change occur
Phenomena such as shape, electrolyte overflow.During test, being displaced do not occur in the positive and negative anodes of lithium ion battery, and pass through test.
Existed using the lithium ion battery of isolation film preparation of the invention compared to comparative example it can be seen from the above experimental result
Preferable capacity retention energy is still kept after vibration, and guarantees that electrode is not subjected to displacement, cycle performance swelling higher than high viscosity
Battery isolating film prepared by polymer is outstanding very much.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (16)
1. a kind of lithium ion battery isolation film, which is characterized in that the lithium ion battery isolation film includes: porous substrate and coating
Polymer coating in a porous substrate at least side surface, the polymer coating are matched via polymer, solvent and auxiliary agent
It is set to polymer paste and is coated with, dries；
The material of the polymer includes by polyacrylic acid, polymethylacrylic acid, polymethyl acrylate, polyethyl acrylate, gathers
Acrylic-styrene copolymer, neopentylglycol diacrylate, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, polyester, polysulfones
At least one of class, the group of polyacrylonitrile composition；
It is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is described molten between 10~85 parts
The weight of agent is between 10~85 parts, and the weight of the auxiliary agent is between 0.01~10 part.
2. lithium ion battery isolation film according to claim 1, it is characterised in that: the structure of the polymer includes nucleocapsid
Structure or spherical structure.
3. lithium ion battery isolation film according to claim 1, it is characterised in that: the diameter of the polymer is between 0.01
μm-10μm。
4. lithium ion battery isolation film according to claim 1, it is characterised in that: the thickness of the polymer coating between
0.1μm-10μm。
5. lithium ion battery isolation film according to claim 1, it is characterised in that: the average molecular weight of the polymer is situated between
Between 100,000~500,000.
6. lithium ion battery isolation film according to claim 1, it is characterised in that: the swelling ratio of the polymer between
Between 10%~150%.
7. lithium ion battery isolation film according to claim 1, it is characterised in that: the porous substrate includes porous basement membrane
And it is coated on the inorganic matter coating of a porous basement membrane at least side surface.
8. lithium ion battery isolation film according to claim 7, it is characterised in that: the porous substrate further includes bonding
Agent, the inorganic matter coating are bonded on the porous basement membrane by the binder, and the material of the binder includes by gathering
Acrylate, polymethacrylates, polymethyl acrylate, polyethyl acrylate, pure-acrylic emulsion, polyacrylic acid-styrene are total
At least one of polymers, neopentylglycol diacrylate, the group of polytetrafluoroethylene (PTFE) composition, the material of the inorganic matter coating
Including by aluminium oxide, boehmite, silica, titanium dioxide, ceria, calcium carbonate, calcium oxide, zinc oxide, magnesia, titanium
At least one of sour cerium, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, titanium phosphate aluminium lithium, the group of lithium nitride composition.
9. lithium ion battery isolation film according to claim 1, it is characterised in that: the solvent includes deionized water, institute
Stating auxiliary agent includes by polyvinyl alcohol, polyethylene glycol, 1,4- butanediol, polyethers, methanol, ethyl alcohol, stearic acid, dodecyl benzene sulfonic acid
Sodium, quaternary ammonium compound lecithin, amino acid pattern, betaine type fatty glyceride, fatty acid sorbitan (sapn), polysorbate
At least one of the group of (tween) composition.
10. a kind of preparation method of lithium ion battery isolation film, which is characterized in that the preparation method includes:
1) polymer, solvent and auxiliary agent are uniformly mixed and obtain polymer paste, the material of the polymer includes by polypropylene
Acid, polymethylacrylic acid, polymethyl acrylate, polyethyl acrylate, polyacrylic acid-styrol copolymer, neopentyl glycol dipropyl
At least one in group that olefin(e) acid ester, polytetrafluoroethylene (PTFE), polyimides, polyamide-based, polyester, polysulfones, polyacrylonitrile form
Kind, it is in terms of 100 parts by the total weight of the polymer paste, the weight of the polymer is described molten between 10~85 parts
The weight of agent is between 10~85 parts, and the weight of the auxiliary agent is between 0.01~10 part；
2) porous substrate is provided, the polymer paste is coated on to an at least side surface for the porous substrate；
3) polymer paste after coating is dried, obtains lithium ion battery isolation film.
11. the preparation method of lithium ion battery isolation film according to claim 10, it is characterised in that: in step 1), adopt
The polymer, the solvent and the auxiliary agent are mixed with the mode of stirring.
12. the preparation method of lithium ion battery isolation film according to claim 10, it is characterised in that: in step 2), institute
The mode for stating coating includes by dip coated, intaglio plate coating, silk-screen printing, transfer coated, extrusion coated, spraying coating and curtain coating
It is coated with one of the group of composition, the speed of the coating is between 1m/min~300m/min.
13. the preparation method of lithium ion battery isolation film according to claim 10, it is characterised in that: in step 3), institute
Stating drying process includes drying, and drying temperature is between 25 DEG C~130 DEG C.
14. the preparation method of lithium ion battery isolation film according to claim 10, it is characterised in that: the solvent includes
Deionized water, the auxiliary agent include by polyvinyl alcohol, polyethylene glycol, 1,4-butanediol, polyethers, methanol, ethyl alcohol, stearic acid, ten
Dialkyl benzene sulfonic acids sodium, quaternary ammonium compound lecithin, amino acid pattern, betaine type fatty glyceride, fatty acid sorbitan (department
Disk), at least one of the group of polysorbate (tween) composition.
15. the preparation method of lithium ion battery isolation film according to claim 10, it is characterised in that: the porous substrate
Including porous basement membrane and it is coated on the inorganic matter coating of a porous basement membrane at least side surface.
16. the preparation method of lithium ion battery isolation film according to claim 15, it is characterised in that: the porous substrate
It further include binder, the inorganic matter coating is bonded on the porous basement membrane by the binder, the material of the binder
Material includes by polyacrylate, polymethacrylates, polymethyl acrylate, polyethyl acrylate, pure-acrylic emulsion, polypropylene
At least one of acid-styrol copolymer, neopentylglycol diacrylate, the group of polytetrafluoroethylene (PTFE) composition, it is described inorganic
The material of object coating includes by aluminium oxide, boehmite, silica, titanium dioxide, ceria, calcium carbonate, calcium oxide, oxidation
In the group that zinc, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, titanium phosphate aluminium lithium, lithium nitride form
At least one.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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-
2018
- 2018-07-03 CN CN201810714735.9A patent/CN109037555A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129313A (en) * | 2016-07-28 | 2016-11-16 | 上海恩捷新材料科技股份有限公司 | A kind of electrochemical appliance isolating membrane and its production and use |
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Address after: 201399 No. 155 Nanlu Highway, Pudong New Area, Shanghai Applicant after: SHANGHAI ENJIE NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 201399 No. 155 Nanlu Highway, Pudong New Area, Shanghai Applicant before: SHANGHAI ENERGY NEW MATERIALS TECHNOLOGY Co.,Ltd. |
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Application publication date: 20181218 |