CN108321337A - A kind of isolation film and its preparation method and application - Google Patents
A kind of isolation film and its preparation method and application Download PDFInfo
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- CN108321337A CN108321337A CN201710036167.7A CN201710036167A CN108321337A CN 108321337 A CN108321337 A CN 108321337A CN 201710036167 A CN201710036167 A CN 201710036167A CN 108321337 A CN108321337 A CN 108321337A
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- isolation film
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- resistant polymer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/423—Polyamide resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/443—Particulate material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of isolation films and preparation method thereof.The isolation film includes porous basement membrane, heat-resistant polymer and oxide filler.
Description
Technical field
The present invention relates to electrochemical fields more particularly to a kind of heat resistant type isolation film and its preparation method and application.
Background technology
Since with preferable chemical stability and excellent physical property, microporous polyethylene film is widely used in two
Secondary lithium ion battery, such as：Battery of mobile phone, Notebook Battery, power tool battery and power vehicle battery.In lithium ion battery
In, the main function of diaphragm is that the positive and negative electrode of battery is made to separate, prevent the two poles of the earth contact and it is short-circuit, be key internal layer group
One of part.The performance of diaphragm determines the interfacial structure of battery, internal resistance etc., directly affects capacity, cycle and the peace of battery
The characteristics such as full performance, the diaphragm haveing excellent performance play an important role the comprehensive performance for improving lithium ion battery.
Currently, the extensive use with power vehicle in life, due to the appearance of larger amt connection in series-parallel battery pack, lithium
The consistency and security performance of ion battery are concerned, and the diaphragm in lithium ion battery as partition positive and negative pole material is to electricity
The requirement of the safety in pond is then higher and higher, especially the high temperature resistance of diaphragm and with positive and negative anodes interfacial contact performance.And
The diaphragm that lithium ion battery uses is generally polyolefin-based microporous barrier, since this polyolefin-based microporous barrier fusing point is less than 150 DEG C,
Therefore it is easy to bring following defect：When battery temperature is increased because of internal or external factor, this diaphragm can shrink or melt,
So that the volume change of diaphragm.The contraction or melting of diaphragm lead to being in direct contact between anode and cathode, to generate inside
Short circuit, and then cause the generation of the contingencies such as battery bulging, burning, explosion.
In order to overcome the reason of mechanical stability difference that the heat resistance of current single-layer septum brings, existing manufacturer to utilize fusing point
High PP does support construction on both sides, and low-melting PE plays fusing closed pore in centre, after PE closed pores, since thermal inertia is made
With even if battery temperature continues to increase, high PP fusing points can also play certain cushioning effect, can enhance the safety of diaphragm
Property.But the above method prepare diaphragm have the shortcomings that it is certain, although as polyalkene diaphragm at a certain temperature its can pass through
Closed pore separates, but the mechanical strength of its own receives certain influence.Therefore there is an urgent need in the art to can improve diaphragm
The heat resistance of material and the new method of its overall mechanical strength.
Invention content
The present invention is intended to provide a kind of isolation film and preparation method thereof of heat resistant type lithium ion battery.
In the first aspect of the present invention, a kind of isolation film is provided, the isolation film includes porous basement membrane, heat-resistant polymer
And oxide filler；The heat-resistant polymer is selected from following one or more：Aromatic polyamide class, polyimides
Class, polyamide-based, polyphenylene sulfide ethers, polysulfones, polyketone and polyetherimide；The oxide filler be selected from alundum (Al2O3),
γ-aluminium hydroxide, silica or magnesia；The grain size of the oxide filler is 0.1-1.5 μm；It is preferred that 0.1-1.0 μm.
In the second aspect of the present invention, a kind of preparation method of the isolation film provided present invention as described above is provided,
The method includes the steps：
(1) heat-resistant polymer and oxide filler is made to form compound in a solvent；
(2) by composite coated on porous basement membrane；With
(3) isolation film provided present invention as described above after drying.
In another preferred example, in step (1), the mass ratio of the heat-resistant polymer and oxide filler is 100 ﹕ (3-
30)；More preferably 100 ﹕ (5-25)；Most preferably 100 ﹕ (5-10).
In another preferred example, the solvent described in step (1) is selected from following one or more：N, N- dimethyl
Formamide (DMF), DMAC N,N' dimethyl acetamide (DMAC), tetrahydrofuran (TFH), N-Methyl pyrrolidone (NMP) and dimethyl
Sulfoxide (DMSO)；It is highly preferred that containing cosolvent in the solvent；The cosolvent is lithium chloride and/or calcium chloride.
In another preferred example, the drying described in step (3) include will be coated with compound porous basement membrane drying after
It is stood in deionized water, then carries out redrying again.
In the third aspect of the present invention, a kind of isolation film provided present invention as described above is provided and is preparing electrochemistry
Purposes in device.
In the fourth aspect of the present invention, provide a kind of electrochemical appliance, the lithium ion battery include anode, cathode,
The isolation film provided present invention as described above between anode and cathode.
In the fifth aspect of the present invention, a kind of heat-resistant polymer answering in preparing electrochemical appliance isolation film is provided
With the heat-resistant polymer is selected from following one or more：Aromatic polyamide class, polyimide, it is polyamide-based,
Polyphenylene sulfide ethers, polysulfones, polyketone and polyetherimide；The heat-resistant polymer in preparing electrochemical appliance isolation film with oxygen
Compound filler shares；The oxide filler is selected from alundum (Al2O3), γ-aluminium hydroxide, silica or magnesia.
Accordingly, the present invention provides the new methods of the heat resistance and its overall mechanical strength that can improve diaphragm material.
Description of the drawings
Fig. 1 shows 20 cyclic discharge capacities of several diaphragms that embodiment provides.
Specific implementation mode
Inventor after extensive and in-depth study, by the combination of heat resistant type polymer and ceramics, is applied to base
In body diaphragm, improves its high temperature resistance, ensure that certain mechanical performance, while also improving it in charge discharge
In cycle performance.On this basis, the present invention is completed.
In the present invention, " basement membrane ", " porous basement membrane ", " polyalcohol stephanoporate basement membrane ", " matrix porosity polyalkene diaphragm ",
" basement membrane polypropylene diaphragm ", " base polyolefin diaphragm " and " polyolefin porous basement membrane " may be used interchangeably, and all refer to polymer
Microporous barrier (also known as porous membranes), is selected from polyethylene and/or polypropylene.The molecular weight of () described polymer microporous film is logical
It is often (20-80) ten thousand, preferably (30-70) ten thousand, more preferably (30-50) ten thousand.The thickness of the polymer microporous film is usually
5-30 μm, preferably 5-20 μm, more preferably 5-16 μm.The porosity of the polymer microporous film is 30-60%, preferably
35-50%, more preferably 38-45%.The air permeability of the polymer microporous film is 100-500sec/100ml, preferably 150-
400sec/100ml, more preferably 180-300sec/100ml.
The porous basement membrane that this field conventional method can be used to prepare, including but not limited to commercially available product.
In the present invention, if without particularly illustrating, percentage (%) or part all refer to the weight relative to composition
Percentage or parts by weight.
In the present invention, if without particularly illustrating, involved each component or its preferred ingredient can be combined with each other
Form new technical solution.
In the present invention, if without particularly illustrating, all embodiments mentioned in this article and preferred implementation side
Formula can be combined with each other to form new technical solution.
In the present invention, if without particularly illustrating, all technical characteristics and preferred feature mentioned in this article can
New technical solution is formed to be combined with each other.
In the present invention, unless otherwise indicated, numberical range " a-b " indicates the contracting of the arbitrary real combinings between a to b
Sketch form shows that wherein a and b are real numbers.Such as numberical range " 0-5 " indicates all to have listed herein between " 0-5 "
Whole real numbers, " 0-5 " are that the breviary of these combinations of values indicates.
In the present invention, unless otherwise indicated, integer numberical range " a-b " indicates the arbitrary integer combination between a to b
Breviary indicate, wherein a and b are integers.Such as integer numberical range " 1-N " indicates 1,2 ... N, wherein N is integer.
If be not specifically stated, the term "an" used in this specification refers to "at least one".
If be not specifically stated, the benchmark of percentage (including weight percent) of the present invention is all the combination
The total weight of object.
" range " disclosed herein is in the form of lower and upper limit.Can be respectively one or more lower limits and one
Or multiple upper limits.Given range is defined by selecting a lower limit and a upper limit.Selected lower and upper limit limit
The boundary of special range is determined.All ranges that can be defined in this way comprising and can combine, i.e., any lower limit
It can combine to form a range with any upper limit.For example, the range of 60-120 and 80-110 are listed for special parameter,
The range for being interpreted as 60-110 and 80-120 is also to expect.In addition, if the minimum zone value 1 and 2 listed, and if
Maximum magnitude value 3,4 and 5 is listed, then following range can be expected all：1-3,1-4,1-5,2-3,2-4 and
2-5.
Herein, unless otherwise indicated, each reaction step can be carried out sequentially, can not also be carried out in order.Example
Such as, can include other steps between each reaction step, and can also reversed order between reaction step.Preferably, originally
Reaction method in text is that sequence carries out.
Isolation film
Isolation film provided by the invention includes polyalcohol stephanoporate basement membrane and epilamellar comprising resistance to coated in polyalcohol stephanoporate
The compound of heat type polymer and oxide filler.
The heat-resistant polymer that the present invention uses can be used as binder and use, while can also play heat-resisting function；It is described resistance to
Thermopolymer is selected from following one or more：Aromatic polyamide class, polyimide, polyamide-based, polyphenylene sulfide
Class, polysulfones, polyketone and polyetherimide (PEI)；Preferred, polyethers ketone (PEK), polyether-ether-ketone (PEEK) and polyimides (PI)；
The molecular weight of the heat-resistant polymer is 20,000-70,000；It is preferred that 40,000-60,000.
As used in the present invention, " aromatic polyamide class " refers to by aromatic diamine and aromatic dicarboxylic acid or aromatic series
Aminobenzoic acid is through the obtained polymer of polycondensation reaction.Principal item has p -aromatic polyamide fiber and meta-aromatic
Two class of polyamide.
As used in the present invention, " polyamide " is primarily referred to as nylon or aramid fiber class.
The oxide filler is selected from alundum (Al2O3), γ-aluminium hydroxide, silica or magnesia；The oxide
The grain size of filler is 0.1-1.5 μm；It is preferred that 0.1-1.0 μm.
Membrane preparation method is isolated
The preparation method of isolation film provided by the invention includes the following steps：
Heat-resistant polymer and oxide filler are formed compound by the first step in a solvent in proportion；
Second step, by composite coated on porous basement membrane；
Third walks, and isolation film provided by the invention is obtained after dry.
In the above-mentioned first step, the mass ratio of above-mentioned heat-resistant polymer and oxide filler is 100 ﹕ (3-30), preferably
100 ﹕ (5-25), more preferable 100 ﹕ (5-10).
In the above-mentioned first step, the solvent is selected from following one or more：N,N-dimethylformamide
(DMF), DMAC N,N' dimethyl acetamide (DMAC), tetrahydrofuran (TFH), N-Methyl pyrrolidone (NMP) and dimethyl sulfoxide (DMSO)
(DMSO)；Preferably, cosolvent is contained in the solvent, the cosolvent is lithium chloride and/or calcium chloride.
In one embodiment of the invention, the mass ratio of heat-resistant polymer and solvent is 1:(2-15), preferably 1:
(10-15)；The mass ratio of heat-resistant polymer and cosolvent is 100:(1-10), preferably 100:(5-10).
In one embodiment of the invention, heat-resistant polymer and dry oxide filler are dissolved in the first step molten
In agent, (preferably 25-35 DEG C) is stirred at 15-40 DEG C, to form sol form compound.
In one embodiment of the invention, second step is that sol form compound is evenly applied to the porous base of polypropylene
On film, 10-60 minutes, preferably 20-40 minutes are stood.
In above-mentioned third step, the mode that this field routine may be used is dried, and such as, but not limited to, vacuum is dry
It is dry.
In one embodiment of the invention, it is uniformly coated with true after the porous basement membrane of sol form compound polypropylene is stood
Sky is dry to remove solvent.
In one embodiment of the invention, it is uniformly coated with after the porous basement membrane of sol form compound polypropylene is stood
It is dried in vacuo under 40-80 DEG C (preferably 50-70 DEG C) 24-72 hours (preferably 36-60 hours), flings to solvent completely.
In a kind of preferred embodiment of the present invention, in above-mentioned third step, after solvent removing, it is coated with sol form compound
The porous basement membrane of polypropylene is placed 1-3 hours in deionized water, then carries out redrying.
In one embodiment of the invention, redrying is carried out according to first time dry mode.
Electrochemical appliance
The present invention provides a kind of electrochemical appliance, including anode, cathode and is interval between adjacent positive and cathode
Isolation film provided by the invention.
The electrochemical appliance includes but not limited to lithium secondary battery, lithium rechargeable battery, ultracapacitor, fuel
Battery and solar cell；The lithium rechargeable battery includes polymer lithium ion secondary battery.
The feature that the features described above or embodiment that the present invention mentions are mentioned can be in any combination.Disclosed in this case specification
All features can be used in combination with any composition form, each feature disclosed in specification, any can provide it is identical,
The alternative characteristics of impartial or similar purpose replace.Therefore it is only impartial or similar spy except having special instruction, revealed feature
The general example of sign.
Main advantages of the present invention are：
1, isolation film high temperature resistant provided by the invention, bonding effect are good.
2, isolation film provided by the invention is more conducive to industrialize.
3, isolation film provided by the invention can guarantee that battery has good cycle performance.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise all percentage, ratio, ratio or number is pressed
Weight meter.
The unit in percent weight in volume in the present invention is well-known to those skilled in the art, for example, refer to
The weight of solute in 100 milliliters of solution.
Unless otherwise defined, all professional and scientific terms used in text and meaning known to one skilled in the art
Justice is identical.In addition, any method and material similar or impartial to described content can be applied to the method for the present invention.Wen Zhong
The preferred implement methods and materials are for illustrative purposes only.
The raw material used in following embodiments：
PEK is purchased from the smooth Science and Technology Co., Ltd. of upper Haitai；
PI is purchased from the smooth Science and Technology Co., Ltd. of upper Haitai；
PEEK is purchased from the smooth Science and Technology Co., Ltd. of upper Haitai.
Embodiment is anode with cobalt acid lithium, using metal lithium sheet as cathode, CR2025 button cells is assembled into, to different diaphragms
Charge-discharge performance investigated.Initial voltage of battery about 3.0V carries out charge-discharge test with 0.1C constant currents.
Embodiment 1
Film preparation is isolated
2g PEK (Mw-600,000), 0.07g is taken to dry Al2O3It dissolves in 30g DMAC+0.1gLiCl, stirring is for 24 hours, warm
Degree control is at 30 DEG C.It after object to be mixed becomes colloidal sol, is evenly applied on basement membrane polypropylene diaphragm, after standing 0.5h, is put
In 60 DEG C of vacuum drying chamber 48h, after DMAC completely volatilization, by its Jing Pao in removing water ion water mortise 2h.Finally by preparation
Composite diaphragm is placed in 48h in 60 DEG C of vacuum drying chambers.
Embodiment 2
Film preparation is isolated
2g PEK (Mw-600,000), 0.3g is taken to dry SiO2It dissolves in 20g NMP+0.2gLiCl, preparation process is the same as real
Apply example 1.
Embodiment 3
Film preparation is isolated
2g PI (Mw-600,000), 0.15g is taken to dry Al2O3It dissolves in 30g DMAC+0.1gLiCl, preparation process is the same as real
Apply example 1.
Embodiment 4
Film preparation is isolated
2g PEEK (Mw-600,000), 0.5g drying γ-AlOOH are taken to dissolve in 30g DMAC+0.2g CaCl2In, it prepares
Process is the same as embodiment 1.
Embodiment 5
Film preparation is isolated
2g PI (Mw-600,000), 0.6g is taken to dry SiO2In dissolving in 30g DMAC+0.15gLiCl, preparation process is same
Embodiment 1.
Embodiment 6
Film preparation is isolated
2g PI (Mw-600,000), 0.1g is taken to dry Al2O3It dissolves in 30g DMAC+0.1gLiCl, preparation process is the same as real
Apply example 1.
Embodiment 7
Film preparation is isolated
2g PI (Mw-600,000), 0.2g is taken to dry Al2O3It dissolves in 30g DMAC+0.1gLiCl, preparation process is the same as real
Apply example 1.
Composite diaphragm material prepared by basement membrane and the above various embodiments is measured respectively in 150 DEG C and 170 DEG C of sound of a roaring fire 30 minutes
The variation of length and width afterwards.Tables 1 and 2 shows that the length and width before and after the sound of a roaring fire of different embodiments and base film becomes
Change, basement membrane is matrix polypropylene diaphragm, and table 3 is that the numerical value of its each cycle performance curve is concluded.
Table 1
Table 2
Table 3
| Embodiment | Conservation rate (%) |
| Basement membrane | 90.7 |
| Embodiment 1 | 94.9 |
| Embodiment 2 | 87.4 |
| Embodiment 3 | 96.6 |
| Embodiment 4 | 84.6 |
| Embodiment 5 | 78.3 |
| Embodiment 6 | 93.3 |
| Embodiment 7 | 95.2 |
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limited to the substantial technological content model of the present invention
It encloses, substantial technological content of the invention is broadly to be defined in the right of application, any technology that other people complete
Entity or method also or a kind of equivalent change, will if identical with defined in the right of application
It is considered as being covered by among the right.
Claims (10)
1. a kind of isolation film, which is characterized in that the isolation film includes porous basement membrane, heat-resistant polymer and oxide filler.
2. isolation film as described in claim 1, which is characterized in that the heat-resistant polymer be selected from it is following it is one or two kinds of with
On：Aromatic polyamide class, polyimide, polyamide-based, polyphenylene sulfide ethers, polysulfones, polyketone and polyetherimide.
3. isolation film as described in claim 1, which is characterized in that the oxide filler is selected from alundum (Al2O3), γ-hydrogen-oxygen
Change aluminium, silica or magnesia.
4. isolation film as claimed in claim 3, which is characterized in that the grain size of the oxide filler is 0.1-1.5 μm；It is preferred that
0.1-1.0μm。
5. a kind of preparation method of isolation film according to any one of claims 1-4, which is characterized in that the method includes steps
Suddenly：
(1) heat-resistant polymer and oxide filler is made to form compound in a solvent；
(2) by composite coated on porous basement membrane；
(3) isolation film according to any one of claims 1-4 is obtained after drying.
6. preparation method as claimed in claim 5, which is characterized in that in step (1), the heat-resistant polymer and oxide are filled out
The mass ratio of material is 100 ﹕ (3-30)；It is preferred that 100 ﹕ (5-25)；More preferable 100 ﹕ (5-10).
7. preparation method as claimed in claim 5, which is characterized in that the solvent described in step (1) is selected from following one kind
Or it is two or more：N,N-dimethylformamide (DMF), DMAC N,N' dimethyl acetamide (DMAC), tetrahydrofuran (TFH), N- methyl
Pyrrolidones (NMP) and dimethyl sulfoxide (DMSO) (DMSO)；Preferably, contain cosolvent in the solvent；The cosolvent is chlorination
Lithium and/or calcium chloride.
8. a kind of purposes of isolation film according to any one of claims 1-4 in preparing electrochemical appliance.
9. a kind of electrochemical appliance, which is characterized in that the lithium ion battery includes anode, cathode, be located at positive and cathode it
Between isolation film according to any one of claims 1-4.
10. a kind of application of heat-resistant polymer in preparing electrochemical appliance isolation film, the heat-resistant polymer is selected from following
It is one or more kinds of：Aromatic polyamide class, polyimide, polyamide-based, polyphenylene sulfide ethers, polysulfones, polyketone and poly-
Etherimide；The heat-resistant polymer shares in preparing electrochemical appliance isolation film with oxide filler；The oxide is filled out
Material is selected from alundum (Al2O3), γ-aluminium hydroxide, silica or magnesia.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710036167.7A CN108321337A (en) | 2017-01-17 | 2017-01-17 | A kind of isolation film and its preparation method and application |
| PCT/CN2017/099373 WO2018133416A1 (en) | 2017-01-17 | 2017-08-29 | Isolation film and preparation method therefor and use thereof |
| PCT/CN2018/073003 WO2018133796A1 (en) | 2017-01-17 | 2018-01-17 | Separators, electrochemical devices comprising the same, and methods for producing the separators |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710036167.7A CN108321337A (en) | 2017-01-17 | 2017-01-17 | A kind of isolation film and its preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755649A (en) * | 2019-03-28 | 2020-10-09 | 河北金力新能源科技股份有限公司 | PEI coating slurry, diaphragm and preparation method and application thereof |
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| CN101019266A (en) * | 2004-12-13 | 2007-08-15 | 松下电器产业株式会社 | Lithium ion secondary battery |
| CN102015083A (en) * | 2008-04-08 | 2011-04-13 | Sk能源株式会社 | Microporous polyolefin composite film with a thermally stable porous layer at high temperature |
| CN102394282A (en) * | 2011-11-25 | 2012-03-28 | 佛山市金辉高科光电材料有限公司 | Lithium ion secondary battery porous multilayer diaphragm and manufacture method thereof |
| CN103094515A (en) * | 2012-12-14 | 2013-05-08 | 深圳中兴创新材料技术有限公司 | Composite membrane and preparation method as well as battery |
| CN105742551A (en) * | 2016-03-23 | 2016-07-06 | 上海恩捷新材料科技股份有限公司 | Electrochemical apparatus isolating membrane and preparation method and application therefor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755649A (en) * | 2019-03-28 | 2020-10-09 | 河北金力新能源科技股份有限公司 | PEI coating slurry, diaphragm and preparation method and application thereof |
| CN111755649B (en) * | 2019-03-28 | 2022-10-28 | 河北金力新能源科技股份有限公司 | PEI coating slurry, diaphragm, and preparation method and application thereof |
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| WO2018133416A1 (en) | 2018-07-26 |
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