CN108269958A - Diaphragm and its preparation method and application - Google Patents
Diaphragm and its preparation method and application Download PDFInfo
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- CN108269958A CN108269958A CN201810067162.5A CN201810067162A CN108269958A CN 108269958 A CN108269958 A CN 108269958A CN 201810067162 A CN201810067162 A CN 201810067162A CN 108269958 A CN108269958 A CN 108269958A
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- Prior art keywords
- diaphragm
- lithium battery
- coating
- adhesive
- basement membrane
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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
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Cell Separators (AREA)
Abstract
The present invention provides a kind of diaphragms and its preparation method and application, are related to battery technology field, and the diaphragm includes the basement membrane and coating that are cascading, and the coating is mainly made of high-temperature resistant nano grain with adhesive, and the preparation method of diaphragm includes the following steps：High-temperature resistant nano grain and adhesive are dissolved in solvent, slurry is made, slurry is coated on membrane surface, after dry, obtains diaphragm；It is poor to improve existing diaphragm anti-extrusion, needle thorn and impact property, easily occur damaged, and it can shrink or be carbonized at high temperature, the technical issues of causing lithium battery that burning or explosion occurs, by setting high-temperature resistant nano grain and coating made of adhesive on basement membrane, not only increase impact resistance, anti-extrusion performance and the resistance to acupuncture performance of lithium battery, and lithium battery high temperature resistance can be improved, so as to which the security performance of lithium battery greatly improved, the generation of lithium battery burning or explosion accident is reduced.
Description
Technical field
The present invention relates to battery technology field, more particularly, to a kind of diaphragm and its preparation method and application.
Background technology
Lithium ion battery is because it is with volume energy ratio and weight energy ratio are high, voltage is high, self-discharge rate is low, memoryless effect
The advantages that should, having extended cycle life is widely used in every field.But its safety constrains the further development of lithium battery.Every
Film is between lithium battery positive and negative anodes, for blocking being in direct contact to prevent short circuit, while it is more micropores for positive and negative anodes
Membrane structure, in order to which lithium ion passes through.But when lithium battery impacted, is squeezed or when needle pierces, conventional membrane can occur
Rupture makes lithium battery interior that short circuit occur, and the substance of a large amount of heat induced lithium battery interior of abrupt release is decomposed and oxygen
Change reduction reaction, lead to lithium battery thermal runaway.In addition, traditional diaphragm melt temperature is low, percent thermal shrinkage is high, work as lithium battery interior
When temperature increases, diaphragm meeting heat shrinkable is even carbonized, and positive and negative anodes contact area is caused to increase, and short circuit phenomenon is further exacerbated by,
Cause lithium battery that burning or explosion occurs.
In view of this, it is special to propose the present invention.
Invention content
One of the objects of the present invention is to provide a kind of diaphragm, to improve existing diaphragm anti-extrusion, needle thorn and impact
Can be poor, the technical issues of breakage easily occurring, and can shrink or be carbonized at high temperature, causes lithium battery that burning or explosion occurs.
Diaphragm provided by the invention, including the basement membrane and coating being cascading, the coating is mainly received by high temperature resistant
The grain of rice is made with adhesive.
Further, the basement membrane is microporous film；
Preferably, the basement membrane is more microporous polymer films；
Preferably, more microporous polymer films are selected from polyethylene, polypropylene, polyethylene terephthalate and polyamides
At least one of imines.
Further, the high-temperature resistant nano grain-by-grain seed selection is from alundum (Al2O3), aluminium hydroxide, boehmite, magnesia, hydroxide
Magnesium, titanium dioxide, barium sulfate, lead zirconate titanate, zinc borate, zinc carbonate, basic zinc carbonate, magnesium carbonate, basic magnesium carbonate, carbonic acid
At least one of lithium, calcium carbonate, polyimides, polytetrafluoroethylene (PTFE), aramid fiber and terylene.
Further, the thickness ratio of the coating and the basement membrane is (0.5-10):1, preferably (0.5-2):1.
Further, described adhesive is selected from polyacrylic acid, polyacrylamide, polyethylene glycol oxide, polytetrafluoroethylene (PTFE), gathers partially
Vinyl chloride, polyacrylamide, butadiene-styrene rubber, hydroxypropyl methyl cellulose, methylcellulose, carboxymethyl cellulose, polyvinyl alcohol,
At least one of acrylonitrile copolymer, sodium alginate, chitosan and chitosan derivatives.
Further, the grain size of the high-temperature resistant nano grain is 10-100nm, preferably 20-50nm.
The second object of the present invention is to provide the preparation method of above-mentioned diaphragm, include the following steps：
High-temperature resistant nano grain and adhesive are dissolved in solvent, slurry is made, slurry is coated on membrane surface, it is dry
Afterwards, diaphragm is obtained.
Further, the solvent is water and/or organic solvent；
Preferably, the organic solvent is N-Methyl pyrrolidone.
Further, slurry is dried by drying, the temperature of drying is 70-90 DEG C.
The third object of the present invention is to provide application of the above-mentioned diaphragm in lithium battery.
Diaphragm provided by the invention, by the way that high-temperature resistant nano grain is set to replace passing with coating made of adhesive on basement membrane
The diaphragm of system single layer structure, not only increases impact resistance, anti-extrusion performance and the resistance to acupuncture performance of lithium battery, and improves
Lithium battery high temperature resistance so as to which the security performance of lithium battery greatly improved, reduces lithium battery burning or explosion accident
Occur, and be conducive to improve the cycle life of lithium battery.
The preparation method of diaphragm provided by the invention, it is simple for process, it is easy to operate, production efficiency can be effectively improved.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
The charging and discharging curve figure of lithium battery made of the diaphragm that Fig. 1 is provided for embodiment 1；
The charging and discharging curve figure of lithium battery made of the diaphragm that Fig. 2 is provided for comparative example 1.
Specific embodiment
Technical scheme of the present invention will be clearly and completely described below, it is clear that described embodiment is this hair
Bright part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
All other embodiments obtained under the premise of creative work are made, shall fall within the protection scope of the present invention.
According to an aspect of the present invention, the present invention provides a kind of diaphragm, including the basement membrane being cascading and painting
Layer, the coating are mainly made of high-temperature resistant nano grain with adhesive.
In the present invention, coating is mainly made of high-temperature resistant nano grain and adhesive so that coating has good resistance to height
Warm nature energy at high temperature, can keep good structural stability, and basement membrane is shunk at high temperature, and micropore is closed, so as to
Separate the connection of positive and negative interpolar electrolyte, prevent lithium battery positive and negative anodes from short circuit occurs, improve lithium battery safety, be conducive to be promoted
The cycle life of lithium battery.
Diaphragm provided by the invention, by setting high-temperature resistant nano grain and coating made of adhesive on basement membrane, not only
Impact resistance, anti-extrusion performance and the resistance to acupuncture performance of lithium battery are improved, and lithium battery heat-resisting quantity can be improved
Can, so as to which the security performance of lithium battery greatly improved, the generation of lithium battery burning or explosion accident is reduced, and be conducive to improve
The cycle life of lithium battery.
In the preferred embodiment of the present invention, basement membrane is traditional microporous film, can be more microporous polymers
Object film may be multi-microporous ceramic film, in order to passing through for lithium ion.
In present invention further optimization embodiment, basement membrane is more microporous polymer films.Pass through more microporous polymers
Object film is as basement membrane so that basement membrane has better structural stability and flexibility.
In the still more preferably embodiment of the present invention, more microporous polymer films are selected from polyethylene, polypropylene, gather
At least one of ethylene terephthalate and polyimides.
In the preferred embodiment of the present invention, high-temperature resistant nano grain-by-grain seed selection is from alundum (Al2O3), aluminium hydroxide, Bo Mu
Stone, magnesia, magnesium hydroxide, titanium dioxide, barium sulfate, lead zirconate titanate, zinc borate, zinc carbonate, basic zinc carbonate, magnesium carbonate,
At least one of basic magnesium carbonate, lithium carbonate, calcium carbonate, polyimides, polytetrafluoroethylene (PTFE), aramid fiber and terylene.
By adding in high-temperature resistant nano grain in adhesive, the high temperature resistance of coating can be effectively improved, makes it in height
Also good dimensional stability can be kept under temperature, so as to avoid, because positive and negative anodes contact area is caused to become larger during diaphragm retracts, improving
The safety of lithium battery is conducive to improve the service life of lithium battery.
In the present invention, high-temperature resistant nano grain can be alundum (Al2O3), aluminium hydroxide, boehmite, magnesia, hydroxide
Magnesium, titanium dioxide, barium sulfate, lead zirconate titanate, zinc borate, zinc carbonate, basic zinc carbonate, magnesium carbonate, basic magnesium carbonate, carbonic acid
One kind in lithium, calcium carbonate, polyimides, polytetrafluoroethylene (PTFE), aramid fiber and terylene, or more than two or three of mixing
Object.
In the preferred embodiment of the present invention, the thickness ratio of coating and basement membrane is (0.5-10)：1, preferably
(0.5-2):1。
In the typical but non-limiting embodiment of the present invention, the thickness of coating and basement membrane is such as 0.5:1、1:1、
2:1、3:1、4:1、5:1、6:1、7:1、8:1、9:1 or 10:1.
By the way that the thickness ratio of coating and basement membrane is set as (0.5-10):1, to ensure diaphragm at high temperature, basement membrane occurs
After contraction, coating still remaining dimensionally-stable property to avoid because positive and negative anodes contact area is caused to become larger during diaphragm retracts, improves lithium electricity
The safety in pond.
When the thickness of coating and basement membrane is less than 0.5:After 1, coating dimensional stability is deteriorated, it may occur that deformation causes
Lithium battery safety becomes larger, when the thickness of coating and basement membrane is more than 10:1 coating is too thick, it may appear that coating is detached from, and is caused in battery
Resistance rises, and can not ensure the normal use of battery.
In the preferred embodiment of the present invention, adhesive is selected from, but not limited to, polyacrylic acid (PAA), polyacrylamide
Amine (PAM), polyethylene glycol oxide (PEO), polytetrafluoroethylene (PTFE) (PTFE), Vingon (PVDF), butadiene-styrene rubber (SBS), hydroxypropyl
Ylmethyl cellulose (HPMC), methylcellulose (MC), carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), acrylonitrile compolymer
At least one of object, sodium alginate, chitosan and chitosan derivatives.
Acrylonitrile copolymer is including LA132, LA133 and LA135 etc..
Adhesive can be one kind in above-mentioned adhesive, or the mixing of more than two or three above-mentioned adhesive
Object.
In the preferred embodiment of the present invention, the grain size of high-temperature resistant nano grain is 10-100nm, preferably 20-
50nm。
In the present invention, the typical but non-limiting grain size of high-temperature resistant nano grain as 10,15,20,25,30,35,
40th, 45,50,55,60,65,70,75,80,85,90,95 or 100nm.
By the way that the grain size of high-temperature resistant nano grain is defined to 10-100nm, in order to which high-temperature resistant nano grain divides in adhesive
It dissipates uniform.
According to the second aspect of the invention, the present invention provides the preparation method of above-mentioned diaphragm, include the following steps：
High-temperature resistant nano grain and adhesive are dissolved in solvent, slurry is made, slurry is coated on membrane surface, it is dry
Afterwards, diaphragm is obtained.
The preparation method of diaphragm provided by the invention, it is simple for process, it is easy to operate, production efficiency can be effectively improved.
In the preferred embodiment of the present invention, solvent is water and/or organic solvent；
Preferably, organic solvent is N-Methyl pyrrolidone.
In the present invention, different solvents is selected according to different adhesive types, when adhesive is water-soluble binder,
Water is selected when adhesive is water-insoluble, to select organic solvent as solvent, preferably N-Methyl pyrrolidone as solvent.
In the preferred embodiment of the present invention, slurry is dried by drying, the temperature of drying is 70-90 DEG C.
In the present invention, slurry is dried by drying, the preparation speed of diaphragm can be accelerated, improve production efficiency.
In the typical but non-limiting embodiment of the present invention, the temperature of drying is 70,72,75,78,80,82,
85th, 88 or 90 DEG C.
According to the third aspect of the present invention, the application the present invention provides diaphragm in lithium battery.
Lithium battery replaces traditional microporous film using diaphragm provided by the invention, not only so that the impact resistance of diaphragm
Energy, anti-extrusion performance and resistance to acupuncture performance are obviously improved, and high temperature resistance is excellent, so as to which the peace of lithium battery greatly improved
Full performance, reduces the generation of lithium battery burning or explosion accident, and is conducive to improve the cycle life of lithium battery.
Technical solution provided by the invention is further described with reference to embodiment and comparative example.
Embodiment 1
A kind of diaphragm is present embodiments provided, diaphragm includes the microporous polyethylene film and coating that are cascading,
The thickness ratio of coating and microporous polyethylene film is 0.5:1, it is prepared in accordance with the following steps：
(1) terylene and polyacrylic binder that alundum (Al2O3) and grain size that grain size is 10nm are 100nm are dissolved in
It is uniformly mixed in water, slurry is made；
(2) slurry is coated on microporous polyethylene film；
(3) it is dry under the conditions of 70 DEG C, obtain diaphragm.
Embodiment 2
A kind of diaphragm is present embodiments provided, diaphragm includes the more capillary polypropylenes and coating that are cascading, coating
Thickness ratio with more capillary polypropylenes is 10:1, it is prepared in accordance with the following steps：
(1) polyimides and polyacrylamide amine bonding agent that zinc carbonate and grain size that grain size is 20nm are 80nm are dissolved in
It is uniformly mixed in water, slurry is made；
(2) slurry is coated on more microporous polypropylene films；
(3) it is dry under the conditions of 90 DEG C, after dry, obtain diaphragm.
Embodiment 3
A kind of diaphragm is present embodiments provided, diaphragm includes the more micropore polyethylene terephthalate being cascading
The thickness ratio of film and coating, coating and more micropore polyethylene terephthalate thin films is 4:1, in accordance with the following steps into
It is prepared by row：
(1) aluminium hydroxide and polyethylene glycol oxide adhesive that grain size is 40nm are dissolved in the water, are uniformly mixed, slurry is made
Material；
(2) slurry is coated in more micropore polyethylene terephthalate thin films；
(3) it is dry under the conditions of 85 DEG C, after dry, obtain diaphragm.
Embodiment 4
A kind of diaphragm is present embodiments provided, diaphragm includes the more microporous polypropylene film films being cascading and painting
The thickness ratio of layer, coating and more microporous polypropylene films is 2:1, it is prepared in accordance with the following steps：
(1) zinc carbonate, the terylene that grain size is 60nm aramid fibers and grain size is 40nm and polypropylene that grain size is 20nm are glued
Mixture is soluble in water to be uniformly mixed, and slurry is made；
(2) slurry is coated on more microporous polypropylene films；
(3) it is dry under the conditions of 75 DEG C, after dry, obtain diaphragm.
Embodiment 5
A kind of diaphragm is present embodiments provided, diaphragm includes the Kapton film and coating that are cascading, applies
The thickness ratio of layer and Kapton is 1:1, it is prepared in accordance with the following steps：
(1) by silica that grain size is 20nm, grain size be 30nm aluminium oxide, grain size is 40nm terylene and grain size is
The polyimides and polyacrylamide amine bonding agent of 40nm are soluble in water to be uniformly mixed, and slurry is made；
(2) slurry is coated on more microporous polyamide imines films；
(3) it is dry under the conditions of 80 DEG C, after dry, obtain diaphragm.
Embodiment 6
This comparative example provides a kind of diaphragm, and diaphragm provided in this embodiment provides the difference of diaphragm with embodiment 5
It is, the thickness ratio of coating and Kapton is 0.1:1.
Embodiment 7
This comparative example provides a kind of diaphragm, and diaphragm provided in this embodiment provides the difference of diaphragm with embodiment 5
It is, the thickness ratio of coating and Kapton is 20:1.
Comparative example 1
A kind of diaphragm is present embodiments provided, diaphragm is single layer structure, and diaphragm is more microporous polypropylene films.
Comparative example 2
A kind of diaphragm is present embodiments provided, diaphragm is single layer structure, and diaphragm is microporous polyethylene film.
Test example 1
Embodiment 1-7 and comparative example the 1-2 diaphragm provided are respectively placed in electrolyte, electrolyte is non-water system carbonic acid
Esters electrolyte respectively heats above-mentioned electrolyte, and observation diaphragm is heated situation, when the temperature of electrolyte is increased to 130
DEG C when, the diaphragm that comparative example 1-2 is provided starts heat shrinkable, and micropore is closed, and is deformed upon, in the diaphragm that embodiment 1-7 is provided
Basement membrane heat shrinkable, micropore be closed, deform upon, but coating is always maintained at good dimensional stability.
This illustrates that 1- of the embodiment of the present invention provides diaphragm when heated, and coating can keep good dimensional stability, make
It in application, separate the connection of positive and negative interpolar electrolyte, prevents lithium battery positive and negative anodes from short circuit occurs in lithium battery, improves lithium electricity
Pond safety is conducive to be promoted the cycle life of lithium battery.
Test example 2
Respectively using the diaphragm that the embodiment 1-6 diaphragms provided and comparative example 1-2 are provided as the diaphragm of lithium battery, and will be every
Film and positive/negative plate are made battery core in a winding manner, then soft package lithium battery 1-8 is made with electrolyte, aluminum plastic film etc., and capacity is
2400mAh, and soft package lithium battery can not be made in the diaphragm that embodiment 7 provides, and test the impact of soft package lithium battery 1-8 respectively
Energy, extrusion performance and acupuncture performance, test result are as shown in table 1.
Wherein, the method for shock-testing is：Lithium battery is positioned on platform, is fixed with fixture, by 10kg weights from 1m
Height is freely fallen, and impacts lithium battery.
Squeezing the method tested is：Semicylinder of the radius for 75mm is used, the length of semicylinder, which is more than, is extruded lithium
The pole plate of the dimensional form of battery squeezes lithium battery for stripper plate；Perpendicular to stripper plate pressuring direction, extrusion speed is (5 ± 1)
Mm/s, extruding degree for lithium battery voltage reach 0V or deflection reach 30% or squeeze reach 200kN after stop squeezing.
The method of lancing test is：With the draw point of diameter 5-8mm (coning angle of needle point is 45-60 °, draw point surface-brightening,
Non-oxidation layer and greasy dirt), with the speed of 25 ± 5mm/S, run through from the direction perpendicular to lithium battery, through being located proximate in geometry
The heart, and rest in lithium battery and observe 1 hour.
1 lithium battery performance test table of table
As it can be seen from table 1 the needle thorn percent of pass of lithium battery made of the diaphragm that 1-6 of the embodiment of the present invention is provided, impact
Percent of pass and the rate that is pressed through are all remarkably higher than using traditional microporous polyethylene film or polypropylene film, this explanation is adopted
The lithium battery made of diaphragm provided by the invention, the security performance under a problem that impact, extruding and needle pierce significantly carry
It is high.
By the comparison of lithium battery 1-5 and lithium battery 6 as can be seen that when the thickness of diaphragm and basement membrane is (0.5-10)：1
When, the impact resistance of made lithium battery, extruding and acupuncture performance are more preferable, security performance higher.
Test example 3
Lithium battery made of the diaphragm that lithium battery made of the diaphragm that embodiment 1 is provided and comparative example 1 provide respectively into
Row charge-discharge test, test condition are as follows：Constant-current constant-voltage charging：Blanking voltage 4.2V, charging current 1200mA, cut-off current
100mA, 25 DEG C of environment temperature；Constant-current discharge：Blanking voltage 3.0V, discharge current 1200mA, 25 DEG C of environment temperature.
The charging and discharging curve figure of lithium battery made of the diaphragm that Fig. 1 is provided for embodiment 1；Fig. 2 be comparative example 1 provide every
The charging and discharging curve figure of lithium battery made of film；As can be seen from comparison with Figure 1 and Figure 2, the lithium battery punching that Fig. 1 and Fig. 2 is provided is put
Electric performance test curve is basically identical, this explanation sets cated diaphragm to replace tradition using provided by the invention on basement membrane
Single layer structure microporous film, the performance of lithium battery will not be impacted, made charging and discharging lithium battery performance with
Traditional charging and discharging lithium battery performance is consistent.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of diaphragm, which is characterized in that including the basement membrane and coating being cascading, the coating is mainly received by high temperature resistant
The grain of rice is made with adhesive.
2. diaphragm according to claim 1, which is characterized in that the basement membrane is microporous film；
Preferably, the basement membrane is more microporous polymer films；
Preferably, more microporous polymer films are selected from polyethylene, polypropylene, polyethylene terephthalate and polyimides
At least one of.
3. diaphragm according to claim 1, which is characterized in that the high-temperature resistant nano grain-by-grain seed selection is from alundum (Al2O3), hydrogen-oxygen
Change aluminium, boehmite, magnesia, magnesium hydroxide, titanium dioxide, barium sulfate, lead zirconate titanate, zinc borate, zinc carbonate, basic carbonate
At least one in zinc, magnesium carbonate, basic magnesium carbonate, lithium carbonate, calcium carbonate, polyimides, polytetrafluoroethylene (PTFE), aramid fiber and terylene
Kind.
4. diaphragm according to claim 1, which is characterized in that the thickness ratio of the coating and the basement membrane is (0.5-
10):1, preferably (0.5-2):1.
5. diaphragm according to claim 1, which is characterized in that described adhesive is selected from polyacrylic acid, polyethylene glycol oxide, gathers
Acrylamide, tetrafluoroethene, Vingon, polyacrylamide, butadiene-styrene rubber, hydroxypropyl methyl cellulose, methylcellulose,
At least one of carboxymethyl cellulose, polyvinyl alcohol, acrylonitrile copolymer, sodium alginate, chitosan and chitosan derivatives.
6. according to claim 1-5 any one of them diaphragms, which is characterized in that the grain size of the high-temperature resistant nano grain is 10-
100nm, preferably 20-50nm.
7. according to the preparation method of claim 1-6 any one of them diaphragms, which is characterized in that include the following steps：It will be resistance to
High-temperature nano grain and adhesive, which are dissolved in solvent, is made slurry, and slurry is coated on membrane surface, after dry, obtains diaphragm.
8. the preparation method of diaphragm according to claim 7, which is characterized in that the solvent is water and/or organic solvent；
Preferably, the organic solvent is N-Methyl pyrrolidone.
9. the preparation method of diaphragm according to claim 7, which is characterized in that slurry is dried by drying, drying
Temperature is 70-90 DEG C.
10. application of the diaphragm according to claim 1-6 in lithium battery.
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| CN201810067162.5A CN108269958A (en) | 2018-01-24 | 2018-01-24 | Diaphragm and its preparation method and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786627A (en) * | 2019-01-28 | 2019-05-21 | 中国科学院兰州化学物理研究所 | A kind of preparation method of super close electrolyte lithium battery diaphragm |
| CN110317367A (en) * | 2019-07-22 | 2019-10-11 | 陕西科技大学 | A kind of preparation method of chitosan/aramid nano-fiber laminated film |
| CN111785895A (en) * | 2020-07-31 | 2020-10-16 | 合肥国轩高科动力能源有限公司 | Coating diaphragm and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281961A (en) * | 2007-04-06 | 2008-10-08 | 比亚迪股份有限公司 | Coating composition for lithium ion battery diaphragm and method for making the same |
| CN101814590A (en) * | 2010-04-23 | 2010-08-25 | 湖南业翔晶科新能源有限公司 | Porous solid membrane used for lithium ion battery and production method thereof |
| CN102437302A (en) * | 2011-11-25 | 2012-05-02 | 东莞市比比克电子科技有限公司 | Lithium ion battery diaphragm and high temperature thermal-stable lithium ion battery |
| CN103746085A (en) * | 2013-11-07 | 2014-04-23 | 深圳市星源材质科技股份有限公司 | Coating composite separation membrane and preparation method thereof |
| CN104064713A (en) * | 2014-07-10 | 2014-09-24 | 厦门大学 | Composite diaphragm as well as preparation method and application thereof |
| CN104064712A (en) * | 2014-07-10 | 2014-09-24 | 厦门大学 | Method for selecting lithium ion battery ceramic diaphragm bonding agent |
| CN105428576A (en) * | 2015-12-21 | 2016-03-23 | 东莞塔菲尔新能源科技有限公司 | Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery |
-
2018
- 2018-01-24 CN CN201810067162.5A patent/CN108269958A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281961A (en) * | 2007-04-06 | 2008-10-08 | 比亚迪股份有限公司 | Coating composition for lithium ion battery diaphragm and method for making the same |
| CN101814590A (en) * | 2010-04-23 | 2010-08-25 | 湖南业翔晶科新能源有限公司 | Porous solid membrane used for lithium ion battery and production method thereof |
| CN102437302A (en) * | 2011-11-25 | 2012-05-02 | 东莞市比比克电子科技有限公司 | Lithium ion battery diaphragm and high temperature thermal-stable lithium ion battery |
| CN103746085A (en) * | 2013-11-07 | 2014-04-23 | 深圳市星源材质科技股份有限公司 | Coating composite separation membrane and preparation method thereof |
| CN104064713A (en) * | 2014-07-10 | 2014-09-24 | 厦门大学 | Composite diaphragm as well as preparation method and application thereof |
| CN104064712A (en) * | 2014-07-10 | 2014-09-24 | 厦门大学 | Method for selecting lithium ion battery ceramic diaphragm bonding agent |
| CN105428576A (en) * | 2015-12-21 | 2016-03-23 | 东莞塔菲尔新能源科技有限公司 | Composite ceramic coating, lithium ion battery composite ceramic diaphragm and lithium ion battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786627A (en) * | 2019-01-28 | 2019-05-21 | 中国科学院兰州化学物理研究所 | A kind of preparation method of super close electrolyte lithium battery diaphragm |
| CN110317367A (en) * | 2019-07-22 | 2019-10-11 | 陕西科技大学 | A kind of preparation method of chitosan/aramid nano-fiber laminated film |
| CN111785895A (en) * | 2020-07-31 | 2020-10-16 | 合肥国轩高科动力能源有限公司 | Coating diaphragm and preparation method and application thereof |
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