CN109449349A - A kind of microporous polypropylene membrane and its preparation method and application - Google Patents
A kind of microporous polypropylene membrane and its preparation method and application Download PDFInfo
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- CN109449349A CN109449349A CN201811039081.0A CN201811039081A CN109449349A CN 109449349 A CN109449349 A CN 109449349A CN 201811039081 A CN201811039081 A CN 201811039081A CN 109449349 A CN109449349 A CN 109449349A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- 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
This application discloses a kind of microporous polypropylene membranes and its preparation method and application.The polypropylene microporous membrane preparation method of the application include sequentially casting films are made annealing treatment, stretch processing and thermal finalization processing；The temperature of annealing is 143 DEG C -146 DEG C, and the annealing time is 5h-12h；Stretch processing include room temperature to 110 DEG C at a temperature of carry out 1.1-1.4 multiplying power cold drawing, and at 140 DEG C -155 DEG C carry out 1.9-2.5 multiplying power hot-drawn.The preparation method of the application, pass through high annealing and cryogenic tensile, keep the micropore fenestra obtained small and fine and close, not only there is higher porosity, and ventilative value reduces, and prepared microporous barrier is as battery diaphragm in use, the problem of capable of improving inside battery self discharge, increase 3C cycle period, improves battery.
Description
Technical field
This application involves lithium ion battery separator field, more particularly to a kind of microporous polypropylene membrane and preparation method thereof and
Using.
Background technique
Lithium-ion-power cell is excellent because it is high with energy, cell voltage is high, operating temperature range is wide, has extended cycle life etc.
Point is widely used to mobile phone, portable computer, video camera, camera etc..High-capacity lithium-ion power battery exists
It is used in electric car, this will become one of the major impetus power supply of 21 century electric car, and in artificial satellite, boat
Empty space flight and energy storage etc. are applied.
In the structure of lithium battery, diaphragm is crucial one of internal component, and the performance of diaphragm determines the interface of battery
Structure, internal resistance etc. directly affect the characteristics such as the capacity, cycle performance and security performance of battery, and the diaphragm haveing excellent performance is to mentioning
The comprehensive performance of high battery plays an important role.
Microporous polypropylene membrane has the characteristics that high temperature resistant, the good, high security of rigidity.Squeezing out curtain coating simple tension method has
The advantages such as technical process is simple, pore structure is uniform, non-environmental-pollution.Therefore, microporous polypropylene membrane, all use squeeze out curtain coating at present
The preparation of simple tension method.But it is had following defects that and is being drawn based on the polypropylene microporous membrane preparation method for squeezing out casting and stretching
When stretching, if the small and dense microporous barrier in hole can be obtained using cryogenic tensile, average pore size between 15nm-30nm, but
It is that the ventilative value of microporous barrier can increase, porosity reduces；Therefore, microporous polypropylene membrane generallys use drawing by high temperature at present, however
The aperture for the microporous barrier that drawing by high temperature obtains is larger, be easy to cause big hole defect, and then causes in battery in use, causing 3C
Cycle Difference is also easy to produce the problems such as self discharge, poor safety performance.
Summary of the invention
The purpose of the application is to provide a kind of preparation method of improved microporous polypropylene membrane, prepared polypropylene microporous
Film and its application.
To achieve the goals above, the application uses following technical scheme:
The one side of the application discloses a kind of preparation method of microporous polypropylene membrane, which includes sequentially convection current
Prolong film made annealing treatment, stretch processing and thermal finalization processing；Wherein, the temperature of annealing is 135 DEG C -146 DEG C, annealing
The processing time is 5h-12h；Stretch processing include room temperature to 110 DEG C at a temperature of carry out 1.1-1.4 multiplying power cold drawing, and
The hot-drawn of 1.9-2.5 multiplying power is carried out at 140 DEG C -155 DEG C.
It should be noted that it is small and fine and close can to obtain hole by high annealing, cryogenic tensile for the preparation method of the application
Microporous barrier；At the same time, by the adjustment of drawing process, increase hot-drawn multiplying power, increase the porosity of microporous barrier, ventilative value
The problem of reducing, improving inside battery self discharge, 3C cycle period is also increased, battery is improved.
Preferably, the temperature of thermal finalization processing is 150 DEG C -165 DEG C, and sizing multiplying power is 0.7-1.0.
Preferably, heat setting temperature is 165 DEG C.
It should be noted that further, by the adjustment of heat setting process, increasing heat in the preferred embodiment of the application
Setting temperature improves microporous barrier thermal stability to reduce microporous barrier thermal contraction, is improving mechanical property, is improving micropore fenestra
While structure, microporous barrier is also substantially increased applied to the safety in battery.A kind of especially implementation of the application
In, heat setting temperature is promoted to 165 DEG C, can be improved the mechanical property of microporous barrier, improves its safety and thermal stability.
Preferably, the temperature of annealing is 145 DEG C -146 DEG C.
It should be noted that annealing temperature is promoted to 145 DEG C -146 DEG C in a kind of implementation of the application, it can
Thicker platelet is obtained, microporous membrane structure is regular, and aperture is smaller, and film consistency is also more preferable, and micropore film dynamic performance significantly improves,
Also, the ionic conductivity and security performance of microporous barrier all increase.
Preferably, the stretching ratio of cold drawing is 1.3-1.4.
It should be noted that further increasing cold drawing multiplying power in a kind of implementation of the application, microporous barrier can be improved
Global consistency, make platelet arrangement it is more orderly, whole pore structure is more regular, and aperture is smaller；But cold drawing multiplying power increases accordingly
The direction microporous barrier MD tensile strength can be lower；Therefore, the application preferably limits stretching ratio as 1.3-1.4.
Preferably, casting films are the Multi-layer cast film disposably squeezed out using micro-nano lamination techniques.
It should be noted that micro-nano lamination techniques are a kind of microporous barrier multilayers that can obtain nanometer or micron level thickness
The technology of stacking can not only obtain thinner multilayer polyolefine microporous film, but also can be into one using micro-nano lamination techniques
Step promotes the mechanical properties such as tensile strength and puncture strength, and thinner micro-nano layer low temperature closed pore performance is more preferable, safety
It is higher.
Preferably, micro-nano lamination techniques prepare Multi-layer cast film using multilayer multiplication distributor and co-extrusion die head, wherein altogether
The die lip gap of extrusion die head is 1.5-2.5mm, and the processing temperature of co-extrusion die head is 210 DEG C -260 DEG C.
Preferably, the preparation method of the application further includes, when melt is flowed out through die lip, using negative pressure air knife and electrostatic pressure
Side auxiliary patch roller, then obtains Multi-layer cast film through casting roller and sharp cooling roll are cooling；Wherein, the temperature of casting roller and sharp cooling roll point
It Wei not be 70 DEG C -120 DEG C.
It should be noted that the effect of negative pressure air knife is that melt is made quickly to paste roller, melt cooling time is reduced, its crystallization is made
It is more perfect；The effect of electrostatic flanging is to guarantee that melt can be close to be cast roll surface, ensures the consistency of melt.
The another side of the application discloses the microporous polypropylene membrane of the preparation method preparation of the application.
It should be noted that the microporous polypropylene membrane of the application, not only micropore is small and fine and close, but also porosity is high, ventilative
It is worth low, can improves inside battery self discharge problem when using as battery diaphragm, increase 3C cycle period, improve battery and use
Service life.
Preferably, the microporous polypropylene membrane of the application be MULTILAYER COMPOSITE microporous barrier, also, in adjacent layer at least one layer be
It is prepared by the polyacrylic mixture of at least two melt index.
It should be noted that the polyacrylic mixture of at least two melt index, is referred to and is existed respectively using melt index
The polypropylene of two different class is mixed to form mixture, is then used further to prepare microporous barrier；A kind of implementation of the application
In, the polypropylene that melt index is 0.3-1.5g/10min has been respectively adopted, has been 1.6-2.5g/10min poly- third with melt index
Alkene, the two are mixed for preparing microporous barrier.The application uses two kinds of polypropene blended mechanical properties that product can be improved, and reduces
Defect increases safety.
Preferably, in MULTILAYER COMPOSITE microporous barrier, every tunic with a thickness of 2-4 μm.
Preferably, between 15nm-30nm, the closed pore temperature of microporous polypropylene membrane is 160 in the aperture of microporous polypropylene membrane
℃-170℃。
The application's discloses application of the microporous polypropylene membrane of the application in battery diaphragm on one side again.
Due to using the technology described above, the beneficial effects of the present application are as follows:
The preparation method of the application keeps the micropore fenestra obtained small and fine and close, not only by high annealing and cryogenic tensile
With higher porosity, and ventilative value reduces, and prepared microporous barrier is as battery diaphragm in use, can improve battery
The problem of internal self discharge, increases 3C cycle period, improves battery.
In further improvement project, by increasing heat setting temperature, reduces microporous barrier and be heat-shrinked, improve microporous barrier heat
Stability also substantially increases prepared microporous barrier as electricity while improving mechanical property, improving micropore membrane pore structure
Safety when pond diaphragm uses.
Specific embodiment
If microporous polypropylene membrane uses cryogenic tensile, although the small and fine and close microporous barrier in hole can be obtained, thoroughly
Gas value is high, porosity is low；So generally drawing by high temperature at present；However, there is also some problems, such as aperture for drawing by high temperature
Greatly, it is easy to appear big hole defect, 3C Cycle Difference is caused, is also easy to produce the problems such as self discharge, poor safety performance.
The it is proposed of the application creativeness, if it is possible on the basis of cryogenic tensile, improve its ventilative value and porosity, then
It can be very good to avoid the big hole defect of drawing by high temperature, to avoid 3C Cycle Difference, be also easy to produce self discharge, poor safety performance etc. to ask
Topic.
Based on the above understanding and cognition, the application improves the preparation method of microporous polypropylene membrane, improves annealing and stretches
Technique, by high annealing, cryogenic tensile, so that not only micropore is small and fine and close for the microporous polypropylene membrane of preparation, but also porosity
High, ventilative value is low, solves the inherent shortcoming of cryogenic tensile technique, also avoids drawing by high temperature and be easy to appear big hole defect, make
At 3C Cycle Difference, be also easy to produce self discharge, poor safety performance the problems such as.
In the preparation method of the application, by adjusting drawing process, increases hot-drawn multiplying power, make the porosity liter of microporous barrier
The problem of high, ventilative value reduces, improves inside battery self discharge, also increases 3C cycle period, improves battery and uses the longevity
Life.By adjusting drawing process, heat setting temperature is increased, to reduce microporous barrier thermal contraction, microporous barrier thermal stability is improved, makes
While mechanical property must be improved and improve micropore membrane pore structure, microporous barrier is substantially increased applied to the safety in battery.
In addition, forming perfect orientation lamellar structure in curtain coating basement membrane is to determine that basement membrane stretches pore-creating character according to micropore formation mechenism
And the key of basement membrane pore structure；Therefore, what the application was creative uses high annealing, keeps basement membrane orientation platelet more perfect, then
Small and dense pore structure is obtained by cryogenic tensile, to increase substantially in micropore film dynamic performance and battery use process
Safety.
The application is described in further detail below by specific embodiment.Following embodiment only to the application carry out into
One step explanation, should not be construed as the limitation to the application.
Embodiment 1
This example is using the polypropylene of the high fusion index of isotacticity >=99% and the low melt index of isotacticity >=99%
Polypropylene, two kinds of pp materials prepare microporous polypropylene membrane.Wherein, high fusion index polypropylene is specially melt index 1.6-
The polypropylene of 2.5g/10min, polypropylene with low melt index are specially the polypropylene of melt index 0.3-1.5g/10min.This example
The small and fine and close microporous barrier in hole is obtained by the way of high annealing, cryogenic tensile, it is specific the preparation method is as follows:
(1) melting extrusion
Use single screw rod processing melt index for the high fusion index polypropylene of 1.6-2.5g/10min, using twin-screw plus
The polypropylene with low melt index of work melt index 0.3-1.5g/10min is melted by distributor and is coextruded；This example is specifically single
Screw rod: the ratio of twin-screw is 6:4.
(2) casting film-forming
Melt is flowed out from die lip mouth, the casting film-forming after casting roller slab, sharp cooling roll are cooling.
(3) it anneals
Casting films are put into baking oven and are heat-treated, it is 135 DEG C that temperature, which is arranged, in baking oven, makes annealing treatment 12h.
(4) it stretches
The casting films of heat treatment pass through room temperature cold drawing, and the stretching ratio of cold drawing is 1.2；Then 152 DEG C are preheated to be drawn
Stretch, stretching ratio 1.0, this step be pre- hot-stretch, it is therefore an objective to give one temperature of casting films so that subsequent hot-drawn be easier at
Hole；Then 150 DEG C of hot-drawns are carried out again, and hot drawn stretching ratio is 2.39, makes film stretching pore-forming.
(5) thermal finalization
Casting films after hot-drawn are again 0.86 through 160 DEG C of thermal finalizations, sizing multiplying power, elimination internal stress, fixation holes structure,
Increase stability.
(6) it winds
After thermal finalization, microporous barrier is cooling through chill roll, then at the uniform velocity winds, that is, obtains the microporous polypropylene membrane of this example.
Embodiment 2
The microporous polypropylene membrane of this example, raw material, structure and preparation method are all same as Example 1, the difference is that
The stretching ratio of this example cold drawing is 1.3, and hot drawn stretching ratio is 2.35, remaining is same as Example 1.
Embodiment 3
The microporous polypropylene membrane of this example, raw material, structure and preparation method are all same as Example 2, the difference is that
This example annealing steps, it is 145 DEG C that temperature, which is arranged, in baking oven, i.e., annealing temperature is 145 DEG C, remaining is same as Example 2.
Embodiment 4
The microporous polypropylene membrane of this example, raw material, structure and preparation method are all same as Example 3, the difference is that
The heat setting temperature of this example is 165 DEG C, remaining is same as Example 3.
Following parameter attribute test is carried out to the microporous polypropylene membrane of embodiment 1 to 4:
(1) thickness is tested
It carries out, is measured using hand-held calibrator, the direction TD along film takes 5 every 5cm with reference to GB/T 6672-2001
A point measurement, the average value of measurement are its thickness, and thickness unit is μm.
(2) tensile strength is tested
It is carried out with reference to GB/T 1040.3-2006, the sample that specification is 100mm × 20mm is taken to measure in electronic tensile machine.
(3) puncture strength is tested
It is carried out with reference to GB/T 21302-2007, takes specimen holder of the diameter greater than 60mm in the puncture fixture of electronic tensile machine
In, sample is pierced through downwards with 100mm/s speed with the tack needle that diameter is 1mm and is measured.
(4) ionic conductivity is tested
1 layer of diaphragm is cut into and is matched size with 40mm*60mm metal plate, soft-package battery is assembled into, injects electrolyte, is surveyed
AC impedance is tried, is then sequentially placed into 1~4 layer number diaphragm, test resistance value, using the diaphragm number of plies as abscissa, membrane electrical resistance
Make curve for ordinate, finding out slope of a curve is ionic conductivity, can characterize lithium ion transfer ability in diaphragm.
(5) closed pore temperature is tested
Using the stretch mode of thermomechanical analyzer (abbreviation TMA), with 3 DEG C/min heating rate, 20mN load measurement sample
Product length situation of change, closed pore temperature are that temperature, unit are DEG C at deformation quantity inflection point near PE fusing point.
(6) broken film temperature is tested
Using the stretch mode of thermomechanical analyzer (TMA), with 3 DEG C/min heating rate, 20mN load measurement sample is long
Situation of change is spent, broken film temperature is temperature when sample film ruptures, and unit is DEG C.
(7) pore size is tested
It is tested using capillary flow assay instrument, capillary flow assay instrument is to use indifferent gas by Vesicular protein
Body breaks through the diaphragm soaked, and aperture parameters are obtained by calculation in the pressure value of measurement gas outflow, with reference to CB/T2165 into
Row.
(8) 3C loop test
Be assembled into 40mm*60mm soft-package battery, after lithium ion battery partial volume, with 0.5C in 3.0V~4.2V constant current and
Constant pressure charge and discharge charge each time, put and be a little denoted as a circle, and the capacity retention ratio of lithium ion battery is tested after 500 circles, can characterize lithium
Ion cycle performance and battery life in diaphragm.
(9) security performance is tested
By battery it is fully charged after with conducting wire by battery plus-negative plate short circuit, test battery surface temperature variation.The results show that
Battery using the microporous polypropylene membrane of embodiment 1 to embodiment 4 as battery diaphragm, hot face temperature are 140 DEG C, electricity
Pond nut cap is pulled open, and battery is not on fire, does not explode, and illustrates that battery diaphragm safety is good.
The parameter attribute test result of the microporous polypropylene membrane of embodiment 1 to 4 is as shown in table 1.
1 membrane properties test result of table
Table 1 the results show that in embodiment 1, the high melting means of outer layer, internal layer eutectic refer to the laminated diaphragm of stacking arrangement, when
When assembled battery, multi-layer intercrossed arrangement can effectively improve the lithium branch crystalline substance penetration ability for resisting that cathode is formed in battery, while also increase
Big needle thorn, the extrusion capability of inside battery；Multilayer microporous film is influenced by outer layer, and outer layer melting means is high, and aperture is big, in the battery may be used
Ionic conductivity is improved, and internal layer melting means is low, overall mechanical properties are high, while aperture is small, and mutual mistake is reflected in multilayer
The effect of layer superposition, had not only taken into account the performance of microporous barrier, but also macropore is avoided to form imperfect tape hidden danger for security, prevented battery
The generation of the safety accidents such as kindling, explosion occurs.
Compared with Example 2, embodiment 1 uses 135 DEG C of annealing temperature, 1.2 cold drawing multiplying powers, at this time micropore film dynamic performance
It is slightly good, but the poor phenomenon of consistency is showed, apparently there is light and dark striped in film surface, embodiment 2 is on 1 basis of embodiment
Upper increase cold drawing multiplying power is to 1.3, and film global consistency has improvement, and platelet arrangement is more orderly, and whole pore structure is more regular, and aperture becomes
It is small, but septal defect becomes larger, and the direction MD tensile strength is lower.
Compared with Example 2, raising anneal temperature, platelet thickens embodiment 3 at this time, and pore structure is regular, and aperture becomes smaller, film
Consistency improves, and mechanical property significantly improves, and is improved in terms of ionic conductivity and security performance.
Embodiment 4 compared with Example 3, increases setting temperature, and significant change, aperture do not occur apparently for microporous barrier
It does not change, but mechanical property improves significantly, safety, thermal stability have improvement.
The foregoing is a further detailed description of the present application in conjunction with specific implementation manners, and it cannot be said that this Shen
Specific implementation please is only limited to these instructions.For those of ordinary skill in the art to which this application belongs, it is not taking off
Under the premise of from the application design, a number of simple deductions or replacements can also be made.
Claims (10)
1. a kind of preparation method of microporous polypropylene membrane, it is characterised in that: the preparation method includes sequentially carrying out to casting films
Annealing, stretch processing and thermal finalization processing；
The temperature of the annealing is 135 DEG C -146 DEG C, and the annealing time is 5h-12h；
The stretch processing include room temperature to 110 DEG C at a temperature of carry out 1.1-1.4 multiplying power cold drawing, and 140 DEG C-
The hot-drawn of 1.9-2.5 multiplying power is carried out at 155 DEG C.
2. preparation method according to claim 1, it is characterised in that: the temperature of the thermal finalization processing is 150 DEG C -165
DEG C, sizing multiplying power is 0.7-1.0；
Preferably, heat setting temperature is 165 DEG C；
Preferably, the temperature of the annealing is 145 DEG C -146 DEG C；
Preferably, the stretching ratio of the cold drawing is 1.3-1.4.
3. preparation method according to claim 1 or 2, it is characterised in that: the casting films are using micro-nano lamination techniques
Disposably squeeze out obtained Multi-layer cast film.
4. preparation method according to claim 3, it is characterised in that: the micro-nano lamination techniques are using multilayer multiplication distribution
Device and co-extrusion die head prepare Multi-layer cast film, wherein the die lip gap of the co-extrusion die head is 1.5-2.5mm, co-extrusion die head
Processing temperature is 210 DEG C -260 DEG C.
5. the preparation method according to claim 4, it is characterised in that: further include, when melt is flowed out through die lip, using negative
Air knife and electrostatic flanging auxiliary patch roller are pressed, then obtains the Multi-layer cast film through casting roller and sharp cooling roll are cooling；Wherein, described
The temperature of casting roller and sharp cooling roll is respectively 70 DEG C -120 DEG C.
6. the microporous polypropylene membrane of preparation method preparation according to claim 1-5.
7. microporous polypropylene membrane according to claim 6, it is characterised in that: the microporous polypropylene membrane is that MULTILAYER COMPOSITE is micro-
Pore membrane, also, in adjacent layer at least one layer be to be prepared by the polyacrylic mixture of at least two melt index.
8. microporous polypropylene membrane according to claim 7, it is characterised in that: in the MULTILAYER COMPOSITE microporous barrier, every tunic
With a thickness of 2-4 μm.
9. microporous polypropylene membrane according to claim 6, it is characterised in that: the aperture of the microporous polypropylene membrane exists
Between 15nm-30nm, the closed pore temperature of microporous polypropylene membrane is 160 DEG C -170 DEG C.
10. according to application of the described in any item microporous polypropylene membranes of claim 6-9 in battery diaphragm.
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| CN109980157A (en) * | 2019-04-04 | 2019-07-05 | 深圳中兴新材技术股份有限公司 | A kind of preparation method, battery diaphragm and the battery of anti-fold battery diaphragm |
| CN109980165A (en) * | 2019-04-22 | 2019-07-05 | 深圳中兴新材技术股份有限公司 | A kind of strong mechanical performance laminated film of low temperature closed pore and its preparation method and application |
| CN110014711A (en) * | 2019-04-22 | 2019-07-16 | 深圳中兴新材技术股份有限公司 | A kind of MIcroporous polyolefin film and its preparation method and application that adhesive property improves |
| CN110048061A (en) * | 2019-04-22 | 2019-07-23 | 深圳中兴新材技术股份有限公司 | A kind of MULTILAYER COMPOSITE microporous barrier and its preparation method and application |
| CN110071247A (en) * | 2019-04-22 | 2019-07-30 | 深圳中兴新材技术股份有限公司 | A kind of gradient low temperature closed pore composite diaphragm and preparation method thereof that adhesive property improves |
| CN110391384A (en) * | 2019-07-19 | 2019-10-29 | 深圳中兴新材技术股份有限公司 | A kind of high rigidity lithium ion battery separator preparation method and diaphragm obtained |
| CN111129399A (en) * | 2019-12-27 | 2020-05-08 | 武汉中兴创新材料技术有限公司 | Preparation method of polyolefin microporous membrane and polyolefin microporous membrane |
| CN114512767A (en) * | 2020-11-16 | 2022-05-17 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm with high temperature resistance, preparation method thereof and lithium ion battery prepared from same |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155861A (en) * | 2005-03-31 | 2008-04-02 | 东燃化学株式会社 | Microporous polyolefin film and process for producing the same |
| CN102209632A (en) * | 2008-11-10 | 2011-10-05 | 三菱树脂株式会社 | Laminated porous film, separator for lithium cell, and cell |
| CN103128975A (en) * | 2012-12-28 | 2013-06-05 | 深圳中兴创新材料技术有限公司 | Preparation method of polypropylene microporous membrane, polypropylene microporous membrane and application of polypropylene microporous membrane |
| CN103298866A (en) * | 2010-12-28 | 2013-09-11 | 旭化成电子材料株式会社 | Polyolefin porous membrane and method of producing the same |
| CN103897248A (en) * | 2014-04-16 | 2014-07-02 | 贵州省材料产业技术研究院 | Micro-nano multilayer polymer geomembrane as well as preparation method and device thereof |
| CN104017270A (en) * | 2013-03-01 | 2014-09-03 | 平野技研工业株式会社 | Polypropylene series multi-microporous film and manufacturing method thereof |
| CN105161650A (en) * | 2015-09-14 | 2015-12-16 | 深圳市星源材质科技股份有限公司 | Preparation method of small-aperture lithium battery diaphragm |
| CN105374970A (en) * | 2015-11-24 | 2016-03-02 | 同济大学 | Polymer nanofiber membrane for lithium ion battery separator and preparation method and application for polymer nanofiber membrane |
| CN105479765A (en) * | 2015-11-03 | 2016-04-13 | 深圳市星源材质科技股份有限公司 | Preparation method of high-liquid-absorptivity/high-liquid-maintainability dry one-way stretching diaphragm |
| CN105489916A (en) * | 2015-11-26 | 2016-04-13 | 同济大学 | Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film |
| CN108473706A (en) * | 2016-02-09 | 2018-08-31 | 宇部兴产株式会社 | Polyolefin micro porous polyolefin membrane, electrical storage device diaphragm and electrical storage device |
| CN108470873A (en) * | 2018-03-09 | 2018-08-31 | 同济大学 | ABAB type multilayer lithium ion battery membranes with Thermal shutdown function and preparation method thereof |
-
2018
- 2018-09-06 CN CN201811039081.0A patent/CN109449349A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155861A (en) * | 2005-03-31 | 2008-04-02 | 东燃化学株式会社 | Microporous polyolefin film and process for producing the same |
| CN102209632A (en) * | 2008-11-10 | 2011-10-05 | 三菱树脂株式会社 | Laminated porous film, separator for lithium cell, and cell |
| CN103298866A (en) * | 2010-12-28 | 2013-09-11 | 旭化成电子材料株式会社 | Polyolefin porous membrane and method of producing the same |
| CN103128975A (en) * | 2012-12-28 | 2013-06-05 | 深圳中兴创新材料技术有限公司 | Preparation method of polypropylene microporous membrane, polypropylene microporous membrane and application of polypropylene microporous membrane |
| CN104017270A (en) * | 2013-03-01 | 2014-09-03 | 平野技研工业株式会社 | Polypropylene series multi-microporous film and manufacturing method thereof |
| CN103897248A (en) * | 2014-04-16 | 2014-07-02 | 贵州省材料产业技术研究院 | Micro-nano multilayer polymer geomembrane as well as preparation method and device thereof |
| CN105161650A (en) * | 2015-09-14 | 2015-12-16 | 深圳市星源材质科技股份有限公司 | Preparation method of small-aperture lithium battery diaphragm |
| CN105479765A (en) * | 2015-11-03 | 2016-04-13 | 深圳市星源材质科技股份有限公司 | Preparation method of high-liquid-absorptivity/high-liquid-maintainability dry one-way stretching diaphragm |
| CN105374970A (en) * | 2015-11-24 | 2016-03-02 | 同济大学 | Polymer nanofiber membrane for lithium ion battery separator and preparation method and application for polymer nanofiber membrane |
| CN105489916A (en) * | 2015-11-26 | 2016-04-13 | 同济大学 | Porous polymer film for lithium-ion battery and preparation method and application of porous polymer film |
| CN108473706A (en) * | 2016-02-09 | 2018-08-31 | 宇部兴产株式会社 | Polyolefin micro porous polyolefin membrane, electrical storage device diaphragm and electrical storage device |
| CN108470873A (en) * | 2018-03-09 | 2018-08-31 | 同济大学 | ABAB type multilayer lithium ion battery membranes with Thermal shutdown function and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| 吴梦旦: "流延膜及其设备", 《轻工机械》 * |
| 朱汉林: "多层共挤流涎膜机的设计与开发", 《当代化工》 * |
| 李福森: "多层共挤流涎成形过程温度控制技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊） 工程科技Ⅰ辑》 * |
| 王波: "流涎薄膜生产机组自动控制系统关键技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊） 信息科技辑》 * |
| 陈英: "茂金属聚烯烃/PP共混改性研究和易剥离聚丙烯流延薄膜（CPP）的研制", 《中国优秀硕士学位论文全文数据库（电子期刊） 工程科技Ⅰ辑》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980157A (en) * | 2019-04-04 | 2019-07-05 | 深圳中兴新材技术股份有限公司 | A kind of preparation method, battery diaphragm and the battery of anti-fold battery diaphragm |
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| CN110391384A (en) * | 2019-07-19 | 2019-10-29 | 深圳中兴新材技术股份有限公司 | A kind of high rigidity lithium ion battery separator preparation method and diaphragm obtained |
| CN110391384B (en) * | 2019-07-19 | 2022-11-08 | 深圳中兴新材技术股份有限公司 | Preparation method of high-rigidity lithium ion battery diaphragm and diaphragm prepared by preparation method |
| CN111129399A (en) * | 2019-12-27 | 2020-05-08 | 武汉中兴创新材料技术有限公司 | Preparation method of polyolefin microporous membrane and polyolefin microporous membrane |
| CN114512767A (en) * | 2020-11-16 | 2022-05-17 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm with high temperature resistance, preparation method thereof and lithium ion battery prepared from same |
| WO2022099905A1 (en) * | 2020-11-16 | 2022-05-19 | 青岛蓝科途膜材料有限公司 | Lithium-ion battery separator with high-temperature resistance property, preparation method therefor, and lithium-ion battery prepared therewith |
| CN114512767B (en) * | 2020-11-16 | 2022-11-15 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm, preparation method thereof and lithium ion battery prepared from diaphragm |
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Application publication date: 20190308 |