CN104064712B - A kind of system of selection of lithium ion battery ceramic diaphragm binding agent - Google Patents
A kind of system of selection of lithium ion battery ceramic diaphragm binding agent Download PDFInfo
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- CN104064712B CN104064712B CN201410327092.4A CN201410327092A CN104064712B CN 104064712 B CN104064712 B CN 104064712B CN 201410327092 A CN201410327092 A CN 201410327092A CN 104064712 B CN104064712 B CN 104064712B
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- binding agent
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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
-
- 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
A system of selection for lithium ion battery ceramic diaphragm binding agent, relates to lithium ion battery.Inorganic particle and solvent, binding agent are mixed, obtains mixed powder; Mixed powder is coated in individual layer or the double layer surface of common commercially available barrier film, dries, except desolventizing, obtain ceramic diaphragm, the ceramic layer thickness of ceramic diaphragm regulates by the ratio of inorganic particle and solvent, binding agent; Ceramic diaphragm is fixed on 1 ~ 5mm place below electric iron, the temperature controlling electric iron is 100 ~ 480 DEG C, whether can form perforation to what observe ceramic diaphragm after ceramic diaphragm continuous heating 1s ~ 15min, the perforation formed can or can not expand further along with the time; Can be there is corresponding reaction in lithium ion battery, whether form perforation according to ceramic diaphragm at different temperature, and whether perforation can expand the maximum operation temperature of screening ceramic diaphragm further, and determines with this binding agent that corresponding ceramic diaphragm is used.
Description
Technical field
The present invention relates to lithium ion battery, especially relate to a kind of system of selection of lithium ion battery ceramic diaphragm binding agent.
Background technology
Adopt the chemical power source system of liquid electrolyte to need to adopt diaphragm material to intercept positive and negative electrode as lithium ion battery etc., avoid short circuit.Diaphragm material is mainly with polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polytetrafluoroethylene (Polytetrafluoroethylene, PTFE) etc. are the polymer film containing microcellular structure or the nonwoven fabrics of main component.Liquid electrolyte (being generally the carbonate based organic solvent containing electrolytic salt) is present in microcellular structure, realizes the conduction of ion between positive and negative electrode.Barrier film and liquid electrolyte together constitute electrolyte system.
Along with the development in the fields such as electric automobile, have higher requirement for the capacity of the chemical power source systems such as lithium ion battery and power, therefore the fail safe of battery also more and more comes into one's own.The security feature of lithium ion battery depends on selected diaphragm material to a great extent.Due to the feature of polymer itself, although polyalkene diaphragm can provide enough mechanical strengths and chemical stability at normal temperatures, but then show larger thermal contraction under the high temperature conditions, thus just cause, cathode contact also gathers rapidly large calorimetric, first such as can there is the micropore in PE fusing obstruction polymer in PP/PE composite diaphragm at lower temperature (about 120 DEG C), block ionic conduction and effect that PP still plays support prevents electrode from directly contacting, but because the melting temperature of PP is also only had an appointment 150 DEG C, when temperature is increased beyond rapidly the melting temperature of PP, barrier film melting can cause large area short circuit and cause thermal runaway, aggravation thermal accumlation, produce inside battery hyperbar, cause cells burst or blast.Internal short-circuit of battery is the maximum hidden danger of lithium ion battery security.In order to meet the needs of high capacity lithium ion battery development, exploitation high security barrier film has become the task of top priority of industry.
Ceramic diaphragm is the modern high security diaphragm material grown up on microporous polyolefin film basis, and it is coated with oxide as Al at the single or double of polyalkene diaphragm or other polymer dielectrics
2o
3, SiO
2deng the functional diaphragm material of a kind of organo-mineral complexing that inorganic particle is formed.Ceramic diaphragm has been coupled the good mechanical performance of conventional polyolefins barrier film, and the good heat resistance of inorganic particle and the affine performance with electrolyte.Al
2o
3, SiO
2the inorganic particles formed at polyalkene diaphragm or other polymer dielectrics surface Deng inorganic particle is ceramic coating, the existence of ceramic coating significantly improves barrier film dimensional stability under the high temperature conditions and water retainability, maintains good mechanical performance simultaneously.Special in the ceramic diaphragm taking microporous polyolefin film as base material, there is more excellent mechanical strength and the effect of barrier film Thermal shutdown, be more suitable for manufacture and the use of high-capacity lithium-ion power battery.The introducing of inorganic particle also can play the effect of stable electrolyte/electrode interface, improves the electrochemical window of electrolyte system.
At present, mainly by inorganic particle, (the mainly oxide powder of nanometer or sub-micron, as Al for the preparation method of ceramic diaphragm
2o
3, SiO
2, TiO
2deng), binding agent etc. is dispersed in solvent and forms slurry, then form ceramic coating (see JournalofPowerSources195 (2010) 6192 – 6196, CN200580036709.6, CN200780035135.X etc.) by the tape casting or infusion process at polyalkene diaphragm substrate surface.
The thermal contraction performance of ceramic diaphragm, to the pick up of electrolyte, wettability and apply the ionic conductivity of lithium battery of ceramic diaphragm, capacity keeps and high rate performance is subject to inorganic particle, the impact of binding agent and manufacture craft.Corresponding reaction can be there is at different temperature in lithium ion battery, when the temperature of lithium ion battery is 110 DEG C, solid electrolyte interface film (SEI film) in lithium ion battery can decompose, when the temperature of lithium ion battery is 110 ~ 150 DEG C, and the LiC in lithium ion battery
6can react with electrolyte, when the temperature of lithium ion battery is 170 DEG C, the Li metal in lithium ion battery can be separated out, and high temperature can cause lithium ion battery burning even to explode simultaneously.Therefore high-temperature stability is the most important feature of ceramic diaphragm, is also the primary and foremost purpose that ceramic diaphragm makes.The inorganic particle of ceramic diaphragm application is generally the inorganic oxide powder of high-temperature stable nanometer or sub-micron, as Al
2o
3, SiO
2, TiO
2, and binding agent is of a great variety, fusion temperature is not quite similar, and the thermal contraction of binding agent self can cause ceramic diaphragm thermal contraction equally, therefore the key factor be chosen to determine ceramic diaphragm performance quality of binding agent.Ceramic diaphragm binding agent generally chooses macromolecular compound, be that the macromolecular compound of solvent is as Kynoar (Polyvinylidenefluoride with organic solution, PVDF), Kynoar-hexafluoropropylene copolymer (Polyvinylidenefluoride-hexafluoropropylene, PVDF-HFP), polymethyl methacrylate (polymethylmethacrylate, PMMA), polyacrylonitrile (Polyacrylonitrile, PAN), polyimides (Polyimide, PI) etc., be that the macromolecular compound of solvent is as polyvinylpyrrolidone (Polyvinylpyrrolidone with water, PVP), poly(ethylene oxide) (Polyethyleneoxide, PEO), polyvinyl alcohol (Polyvingakohol, PVA), sodium carboxymethylcellulose (Polymethylmethacrylate, and butadiene-styrene rubber (Styrene-butadienerubber CMC), SBR) etc.The fusing point, solubility, molecular weight etc. of binding agent are each variant, ceramic diaphragm make need mass ratio also different, the performance that the selection of binding agent determines ceramic diaphragm is good and bad.
Summary of the invention
The object of the present invention is to provide a kind of system of selection of lithium ion battery ceramic diaphragm binding agent.
The present invention includes following steps:
1) inorganic particle and solvent, binding agent are mixed, obtain mixed powder;
2) by step 1) mixed powder that obtains is coated in individual layer or the double layer surface of common commercially available barrier film, dries, except desolventizing, obtains ceramic diaphragm, and the ceramic layer thickness of ceramic diaphragm regulates by the ratio of inorganic particle and solvent, binding agent;
3) by step 2) ceramic diaphragm that obtains is fixed on 1 ~ 5mm place below electric iron, the temperature controlling electric iron is 100 ~ 480 DEG C, whether can form perforation to what observe ceramic diaphragm after ceramic diaphragm continuous heating 1s ~ 15min, the perforation formed can or can not expand further along with the time; Can be there is corresponding reaction in lithium ion battery, whether form perforation according to ceramic diaphragm at different temperature, and whether perforation can expand the maximum operation temperature of screening ceramic diaphragm further, and determines with this binding agent that corresponding ceramic diaphragm is used.
In step 1) in, described inorganic particle can be selected from titanium dioxide (TiO
2), alundum (Al2O3) (Al
2o
3), cupric oxide (CuO), zinc oxide (ZnO), silica (SiO
2), barium sulfate (BaSO
4) etc. in one, described inorganic particle can adopt inorganic nanoparticles, the shape of described inorganic particle can be at least one in spherical, wire, nanotube-shaped, hexahedron shape etc., and described alundum (Al2O3) can adopt the one in alpha-crystal form alundum (Al2O3), γ crystal formation alundum (Al2O3), rutile crystal type alundum (Al2O3) etc.;
Described solvent can be selected from n-methlpyrrolidone (N-methylpyrrolidone), nitrogen, nitrogen-dimethyl formamide (N, N-dimethylformamide), nitrogen, nitrogen-dimethylacetylamide (N, N-dimethylacetamide), toluene (Methylbenzene), carrene (Dichloromethane), chloroform (Trichloromethane), acetone (Acetone), water (Water), the one in ethanol (Acetone) etc.;
Described binding agent can adopt with organic solution be solvent macromolecular compound or take water as the macromolecular compound of solvent; Described is that the macromolecular compound of solvent is optional from Kynoar (Polyvinylidenefluoride with organic solution, PVDF), Kynoar-hexafluoropropylene copolymer (Polyvinylidenefluoride-hexafluoropropylene, PVDF-HFP), polymethyl methacrylate (polymethylmethacrylate, PMMA), polyacrylonitrile (Polyacrylonitrile, PAN), one in polyimides (Polyimide, PI) etc.; Described is that the macromolecular compound of solvent is optional from polyvinylpyrrolidone (Polyvinylpyrrolidone with the aqueous solution, PVP), poly(ethylene oxide) (Polyethyleneoxide, PEO), polyvinyl alcohol (Polyvingakohol, PVA), sodium carboxymethylcellulose (Polymethylmethacrylate, CMC) one and in butadiene-styrene rubber (Styrene-butadienerubber, SBR) etc.;
In step 2) in, described common commercially available barrier film can adopt single or multiple lift to be the membrane for polymer of matrix with a kind of polyolefin in polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP) etc.; Or with polyimides (Polyamide, and derivative PI), polyester (Polyester, PET), polytetrafluoroethylene (Polytetrafluoroethylene, PTFE), Kynoar (Polyvinylidenefluoride, PVDF), a kind of in polyvinyl chloride (Polyvinylchloride, PVC) etc. is the nonwoven fabrics barrier film of matrix.
In step 3) in, described by step 2) ceramic diaphragm that obtains is fixed on best 2 ~ 3mm place below electric iron; The temperature of described control electric iron is preferably 120 ~ 300 DEG C; Whether perforation can be formed to what observe ceramic diaphragm after the best 10 ~ 60s of ceramic diaphragm continuous heating.
The invention provides a kind of system of selection of lithium ion battery Ceramic Composite barrier film binding agent.Certain distance below electric soldering iron with ability of auto-controlling temparature is fixed on by using the ceramic diaphragm of different binding agent, accurate control electric iron temperature, observe ceramic diaphragm after a period of time and whether can form perforation, the perforation formed can or can not expand with this along with the time to screen the binding agent of ceramic diaphragm further.
Beneficial effect of the present invention is:
Under proposing the different hot environment of test, the perforation situation of ceramic diaphragm, provides a kind of binding agent method selecting ceramic diaphragm.The method is fast and convenient.
Accompanying drawing explanation
Fig. 1 is the preperforative scanning electron microscope (SEM) photograph of comparative example 1 polyalkene diaphragm.
Fig. 2 is comparative example 1 polyalkene diaphragm perforation figure.
Fig. 3 is the PE barrier film scanning electron microscope (SEM) photograph after comparative example 1 hot piercing.
Fig. 4 is the stereoscan photograph of the ceramic diaphragm of embodiment 1.
Fig. 5 is the stereoscan photograph of the ceramic diaphragm of embodiment 2.
Fig. 6 is the stereoscan photograph of the ceramic diaphragm of embodiment 3.
Fig. 7 is the stereoscan photograph of the ceramic diaphragm of embodiment 4.
Fig. 8 is the stereoscan photograph of the ceramic diaphragm of embodiment 5.
Fig. 9 is the stereoscan photograph of the ceramic diaphragm of embodiment 6.
Figure 10 is embodiment 1 ceramic diaphragm high temperature perforation comparison diagram.
Figure 11 is embodiment 2 ceramic diaphragm high temperature perforation comparison diagram.
Figure 12 is embodiment 3 ceramic diaphragm high temperature perforation comparison diagram.
Figure 13 is embodiment 4 ceramic diaphragm high temperature perforation comparison diagram.
Figure 14 is embodiment 5 ceramic diaphragm high temperature perforation comparison diagram.
Figure 15 is embodiment 6 ceramic diaphragm high temperature perforation comparison diagram.
Embodiment
To be described in more detail by embodiment below, but protection scope of the present invention is not limited to these embodiments.
Embodiment 1
Be 95: 5 by aluminum oxide nanoparticle and polyvinylpyrrolidone (PVP) mass ratio, put into water and ethanol (1: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 3mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 150 DEG C, after 10s, by the perforation situation of sem observation barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 1 is see Fig. 4, and embodiment 1 ceramic diaphragm high temperature perforation comparison diagram is see Figure 10.
Comparative example 1
By PE barrier film as 3mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 150 DEG C, after 30 seconds, observe the perforation situation of barrier film.By PP barrier film as 3mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 180 DEG C, after 20s, by the perforation situation of sem observation barrier film.
The preperforative scanning electron microscope (SEM) photograph of comparative example 1 polyalkene diaphragm is see Fig. 1, and figure is see Fig. 2 in polyalkene diaphragm perforation, and the PE barrier film scanning electron microscope (SEM) photograph after hot piercing is see Fig. 3.
Embodiment 2
By synthesis monox nanometer particle and poly(ethylene oxide) (PEO) mass ratio be 95: 5, put into water and ethanol (1: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 2mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 190 DEG C, after 30s, observe the perforation situation of barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 2 is see Fig. 5, and ceramic diaphragm high temperature perforation comparison diagram is see Figure 11.
Embodiment 3
Be 95: 2: 3 mixed powder 1g by the aluminum oxide nanoparticle of synthesis and sodium carboxymethylcellulose (CMC) and butadiene-styrene rubber (SBR) mass ratio, put into deionized water and ethanol (1: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 1mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 200 DEG C, after 40s, by the perforation situation of sem observation barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 3 is see Fig. 6, and ceramic diaphragm high temperature perforation comparison diagram is see Figure 12.
Embodiment 4
Be 85: 15 mixed powder 1g by the magnesium oxide nanoparticle of synthesis and Kynoar-hexafluoropropylene mass ratio, put into methyl pyrrolidone and acetone (3: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 3mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 200 DEG C, after 4min50s, observe the perforation situation of barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 4 is see Fig. 7, and ceramic diaphragm high temperature perforation comparison diagram is see Figure 13.
Embodiment 5
Be 85: 15 mixed powder 1g by the Titanium dioxide nanoparticle of synthesis and polymethyl methacrylate mass ratio, put into methyl pyrrolidone and acetone (3: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 2mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 250 DEG C, after 60s, observe the perforation situation of barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 5 is see Fig. 8, and ceramic diaphragm high temperature perforation comparison diagram is see Figure 14.
Embodiment 6
Be 85: 15 mixed powder 1g by the aluminum oxide nanoparticle of synthesis and polyimides mass ratio, put into methyl pyrrolidone and acetone (3: 1, v: v) mixed solution 10ml, by gained pottery slurries ball milled overnight, by the slurries ultrasonic disperse 10min after mixing, gained slurries are carried out barrier film film.With common polythene (PE) barrier film be barrier film base material make ceramic diaphragm.Gained slurries are evenly coated in the one side of common polythene (PE) barrier film or two-sided.Carry out preheating with electric hot plate at 60 DEG C, put into vacuum drying oven 60 DEG C of oven dry after the volatilization of equal solvent major part and spend the night thoroughly except desolventizing, obtain ceramic diaphragm.By ceramic diaphragm as 1mm place immediately below electric soldering iron with ability of auto-controlling temparature, be heated to 300 DEG C, after 5min, observe the perforation situation of barrier film.
The stereoscan photograph of the ceramic diaphragm of embodiment 6 is see Fig. 9, and ceramic diaphragm high temperature perforation comparison diagram is see Figure 15.
Claims (10)
1. a system of selection for lithium ion battery ceramic diaphragm binding agent, is characterized in that comprising the following steps:
1) inorganic particle and solvent, binding agent are mixed, obtain mixed powder;
2) by step 1) mixed powder that obtains is coated in individual layer or the double layer surface of common commercially available barrier film, and dry, except desolventizing, obtain ceramic diaphragm;
3) by step 2) ceramic diaphragm that obtains is fixed on 1 ~ 5mm place below electric iron, the temperature controlling electric iron is 100 ~ 480 DEG C, whether can form perforation to what observe ceramic diaphragm after ceramic diaphragm continuous heating 1s ~ 15min, the perforation formed can or can not expand further along with the time; Can be there is corresponding reaction in lithium ion battery, whether form perforation according to ceramic diaphragm at different temperature, and whether perforation can expand the maximum operation temperature of screening ceramic diaphragm further, and determines with this binding agent that corresponding ceramic diaphragm is used.
2. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, is characterized in that in step 1) in, described inorganic particle is selected from the one in titanium dioxide, alundum (Al2O3), cupric oxide, zinc oxide, silica, barium sulfate.
3. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, it is characterized in that in step 1) in, described inorganic particle adopts inorganic nanoparticles, and the shape of described inorganic particle is at least one in spherical, wire, nanotube-shaped, hexahedron shape.
4. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 2, is characterized in that described alundum (Al2O3) adopts the one in alpha-crystal form alundum (Al2O3), γ crystal formation alundum (Al2O3), rutile crystal type alundum (Al2O3).
5. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, is characterized in that in step 1) in, described solvent is selected from n-methlpyrrolidone, nitrogen, nitrogen-dimethyl formamide, nitrogen, nitrogen-dimethylacetylamide, toluene, carrene, chloroform, acetone, water, the one in ethanol.
6. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, is characterized in that in step 1) in, described binding agent adopt with organic solution be solvent macromolecular compound or take water as the macromolecular compound of solvent.
7. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 6, is characterized in that the described one taking organic solution as the macromolecular compound of solvent and be selected from Kynoar, Kynoar-hexafluoropropylene copolymer, polymethyl methacrylate, polyacrylonitrile, polyimides.
8. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 6, is characterized in that the described one taking the aqueous solution as the macromolecular compound of solvent and be selected from polyvinylpyrrolidone, poly(ethylene oxide), polyvinyl alcohol, sodium carboxymethylcellulose, butadiene-styrene rubber.
9. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, it is characterized in that in step 2) in, described common commercially available barrier film adopts the membrane for polymer that single or multiple lift is matrix with a kind of polyolefin in polyethylene, polypropylene; Or with a kind of nonwoven fabrics barrier film for matrix in polyimides and derivative thereof, polyester, polytetrafluoroethylene, Kynoar, polyvinyl chloride.
10. the system of selection of a kind of lithium ion battery ceramic diaphragm binding agent as claimed in claim 1, is characterized in that in step 3) in, described by step 2) ceramic diaphragm that obtains is fixed on 2 ~ 3mm place below electric iron; The temperature of described control electric iron is 120 ~ 300 DEG C; Whether perforation can be formed to what observe ceramic diaphragm after ceramic diaphragm continuous heating 10 ~ 60s.
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| CN104269505B (en) * | 2014-10-27 | 2016-09-14 | 沧州明珠隔膜科技有限公司 | A kind of composite lithium ion cell barrier film and preparation method thereof |
| CN105529425B (en) * | 2014-11-19 | 2017-04-12 | 比亚迪股份有限公司 | Ceramic diaphragm and preparation method and application thereof |
| CN105304850A (en) * | 2015-09-17 | 2016-02-03 | 中航锂电（洛阳）有限公司 | Mixed paint for composite membrane of lithium ion battery, composite membrane and preparation method thereof, and lithium ion battery |
| CN106638007A (en) * | 2016-12-22 | 2017-05-10 | 烟台森森环保科技有限公司 | Electrospinning technique-based ceramic diaphragm and preparation method thereof |
| CN108269958A (en) * | 2018-01-24 | 2018-07-10 | 广州鹏辉能源科技股份有限公司 | Diaphragm and its preparation method and application |
| CN109216630A (en) * | 2018-08-28 | 2019-01-15 | 合肥国轩高科动力能源有限公司 | A kind of high performance lithium ion battery composite diaphragm production method |
| CN114552123B (en) * | 2022-01-17 | 2024-01-30 | 上海兰钧新能源科技有限公司 | Lithium ion battery isolation film, battery core and lithium ion battery |
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| US8334076B2 (en) * | 2004-12-10 | 2012-12-18 | Panasonic Corporation | Lithium ion secondary battery and method for producing negative electrode therefor |
| TWI560928B (en) * | 2012-01-20 | 2016-12-01 | Prologium Technology Co Ltd | Electricity supply system and ceramic separator thereof |
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