CN106207058A - A kind of diaphragm for non-water system secondary battery - Google Patents
A kind of diaphragm for non-water system secondary battery Download PDFInfo
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- CN106207058A CN106207058A CN201610664142.7A CN201610664142A CN106207058A CN 106207058 A CN106207058 A CN 106207058A CN 201610664142 A CN201610664142 A CN 201610664142A CN 106207058 A CN106207058 A CN 106207058A
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- diaphragm
- secondary battery
- water system
- system secondary
- coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
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- 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
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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
Abstract
The application relates to field of lithium ion battery, specifically, relates to a kind of diaphragm for non-water system secondary battery.The diaphragm for non-water system secondary battery of the application includes barrier film base material and the coating being attached on substrate surface, and the top layer of coating includes adhesion zone and electrolyte diffusion region.The kind diaphragm for non-water system secondary battery of the application, can improve the bonding force of isolating membrane and electrode, simultaneously after battery process manufacture process, still can be with retaining hole structure, and beneficially electrolyte diffusion conduction, reduces polarization impedance.
Description
Technical field
The application relates to field of lithium ion battery, specifically, relates to a kind of diaphragm for non-water system secondary battery.
Background technology
Non-aqueous secondary battery particularly lithium rechargeable battery is with characteristics such as its energy density high rate capability are good, extensively
It is applied to the mancarried electronic aids such as notebook computer, digital camera, video camera and mobile phone power.Lithium ion secondary electricity in the last few years
Pond is as new-energy automobile power supply, also in broad development.In recent years in order to improve energy density further, have employed aluminum
Compound soft-package battery.But in cyclic process, along with discharge and recharge is carried out, gap can be formed between electrode and isolating membrane, cause
Circulation volume reduces affects the life-span.The most how solving clearance issues between isolating membrane and electrode is lithium rechargeable battery progress
One of key.
One of them scheme solving this problem is on the micro-porous isolating membrane of polyolefin, uses Kynoar (PVDF)
Resin constitutes cementability porous layer.In secondary cell manufacturing process, electrode carries out after winding with isolating membrane injecting electrolysis fluid-tight
Dress, then carries out hot pressing, utilizes the bonding electrode of PVDF resin bed and isolating membrane, solves the problem that circulation produces gap.Existing skill
Art uses by controlling the degree of crystallinity of PVDF polymer, improves the porosity of coating, thus increase electrolyte in coating
Diffusivity.Also there is the hole using porous alumina ceramic filler itself public with the technology increasing the porosity of polymer coating
Open.But, method disclosed in prior art, the hole aperture of the coating of making is the least, its aperture be generally 50～
200nm.In the manufacture process of battery, coating needs to soak through electrolyte, and the High Temperature High Pressure process in formation process.
During these, PVDF can occur swelling, thus causes the hole of coating to be blocked, and the pore structure collapse of coating occurs.
It addition, for the bonding force improving coating, it will usually select the PVDF that caking property is higher.But high adhesiveness
PVDF generally also shows the highest Swelling Capacity.It is thus desirable to provide a kind of coating both to can guarantee that high adhesiveness, also to keep
Pore structure collapse will not occur in cell fabrication processes.
For defect present in prior art, special the application is proposed.
Summary of the invention
Present invention purpose is to propose a kind of diaphragm for non-water system secondary battery.
In order to complete present invention purpose, the technical scheme of employing is:
The application relates to a kind of diaphragm for non-water system secondary battery, including barrier film base material be attached on described substrate surface
Coating, it is characterised in that the top layer of described coating includes adhesion zone and electrolyte diffusion region, the area of described bond regions mesopore
The percentage ratio accounting for the described bond regions gross area is 0～20%, and the area of described electrolyte diffusion region mesopore accounts for described electrolyte and expands
The percentage ratio dissipating district's gross area is 50～90%.
Preferably, the aperture of described adhesion zone is less than or equal to 100nm, and the aperture of described electrolyte diffusion region is 0.3～3 μ
m。
Preferably, the area of described adhesion zone accounts for the 25%～30% of the described barrier film gross area.
Preferably, containing binding agent and ceramic particle in described coating, change contained in described ceramic particle
Compound is the compound containing polar group；Described polar group is preferably hydroxyl.
Preferably, described ceramic particle be shaped as polyhedron or spherical.
Preferably, described ceramic particle is selected from boehmite, aluminium sesquioxide powder, magnesium hydroxide powder.
Preferably, in described coating, ceramic particle and binding agent mass ratio are 0.5～4:1, preferably 1.2～3:1.
Preferably, the wet-film thickness of described coating is 1:0.5～1.5 with the ratio of the median particle diameter of ceramic particle, excellent
Elect 1:0.7～1.1 as.
Preferably, the median particle diameter of described ceramic particle is 1.0～2.5 μm, preferably 1.5 μm.
Preferably, the minimum area of described bond regions is 2.25 μm2, the minimum area of described electrolyte diffusion region is 2.25
μm2。
The beneficial effect that the application can reach is at least:
The diaphragm for non-water system secondary battery of the application, can improve the bonding force of isolating membrane and electrode, simultaneously through electricity
After pool process manufacture process, still can be with retaining hole structure, beneficially electrolyte diffusion conduction, reduces polarization impedance.
Accompanying drawing explanation
Fig. 1 is the electromicroscopic photograph (3000 times) of the application barrier film；
Fig. 2 is the electromicroscopic photograph (5000 times) of the application barrier film；
Fig. 3 is that the application is soaking and the electromicroscopic photograph (2000 times) of barrier film after hot pressing；
Fig. 4 is that the application is soaking and the electromicroscopic photograph (10000 times) of barrier film after hot pressing；
Wherein, N represents that bond regions, C represent electrolyte diffusion region.
Below in conjunction with specific embodiment, the application is expanded on further.Should be understood that these embodiments are merely to illustrate the application
Rather than restriction scope of the present application.
Detailed description of the invention
The application proposes a kind of diaphragm for non-water system secondary battery, including barrier film base material be attached on described substrate surface
Coating, the top layer of coating includes adhesion zone and electrolyte diffusion region, and the area of bond regions mesopore accounts for the hundred of the bond regions gross area
Proportion by subtraction is 0～20%, and it is 50～90% that the area of electrolyte diffusion region mesopore accounts for the percentage ratio of the electrolyte diffusion region gross area.
In the application, the definition mode of adhesion zone and electrolyte diffusion region is: the SEM photograph of barrier film is divided into n × n
Unit, the area (M1) measuring each unit mesopore one by one accounts for the percentage ratio of this cellar area (M2), M1/M2 × 100%.By hole
Area to account for this cellar area percentage ratio be 0～the region formed that is connected on the unit of 20% and position is defined as bonding
District, it is 50～the region definition formed that is connected on the unit of 90% and position that the area in hole accounts for this cellar area percentage ratio
For electrolyte diffusion region.Wherein, the area in each region divides the least, and the analysis to barrier film is the most accurate.In practical operation
During, selecting area is that 5nm × 5nm can meet the requirement that barrier film carries out function zoning.
The minimum area of bond regions is 2.25 μm2, the minimum area of electrolyte diffusion region is 2.25 μm2.Bond regions mesopore
Area accounts for the percentage ratio of the bond regions gross area and just divided by the bond regions gross area and be get final product by the gross area of bond regions endoporus；Electrolyte expands
The area of scattered district mesopore accounts for the electrolyte diffusion region gross area and is just spread divided by electrolyte by the gross area of electrolyte diffusion region endoporus
District's gross area and get final product.
As a kind of improvement of the application barrier film, the aperture of adhesion zone is less than or equal to 100nm, the aperture of electrolyte diffusion region
It is 0.3～3 μm.
Bond regions refers to have and the region of pole piece attachment function in this application, being mainly characterized in that shared by hole of its structure
This region area is little and aperture is little, in further battery technical process, can be formed the most bonding with electrode, reduces gap shape
Become.Electrolyte diffusion region refers to have the region that electrolyte is diffused, its structure be mainly characterized in that hole this area surface shared
Amass big and aperture is big, thus electrolyte can be made fully to spread in barrier film.
As a kind of improvement of the application barrier film, the aperture of adhesion zone is less than or equal to 80nm, the aperture of electrolyte diffusion region
It is 1～3 μm；It is furthermore preferred that the aperture of adhesion zone is less than or equal to 70nm, the aperture of electrolyte diffusion region is 1.5～3 μm.
In this application, the minima in aperture, bond regions is the value that can observe under 2000 times of ultramicroscope, for 50nm.
The electromicroscopic photograph of the barrier film of the application is as shown in Figure 1；By the structure formed in photo in Fig. 1 it is found that be coated with
The less region of formation hole, surface occupied area of layer and the bigger region of hole occupied area.According to coating surface structure mesopore
Gap rate and the calculating in aperture and statistics, mark off bond regions and electrolyte diffusion region, function divide after structure schematic diagram such as
Shown in Fig. 2.
Due to the character of electrolyte diffusion region in the application, even if in the manufacture process of battery, coating is through electrolysis immersion
After High Temperature High Pressure process in bubble and formation process, coating still has higher porosity.Soak and hot pressing etc. through electrolyte
After battery process, after being disassembled by isolating membrane, the stereoscan photograph of barrier film is as shown in Figure 3 and Figure 4.Can be found by Fig. 3, coating
Still having certain porosity, the enlarged photograph of electrolyte diffusion region is as shown in Figure 4.As seen from Figure 4, electrolyte diffusion region is still
There is space clearly, do not block.
As a kind of improvement of the application barrier film, the area of adhesion zone accounts for the 25%～30% of the barrier film gross area.In this Shen
In barrier film please, when primarily serving area is the barrier film gross area 25%～the 30% of the region bondd with pole piece, can play
Good bond effect.The too small meeting in adhesion zone causes barrier film difference bonding with electrode, and bonding interface is poor, affects circulating battery.Bonding
District crosses conference and causes electrolyte diffusion difficulty, increases battery polarization, causes difference of magnification, also can affect circulating battery.
In this application:
The test equipment in aperture and method of testing be: with SEM microscope, porous coating surface needs to measure the district in aperture
Territory carries out observing and preserving picture.Horizontal direction aperture L1 and longitudinal direction aperture for each hole measurement picture mesopore
L2, the calculation in aperture is (L1+L2)/2.Average as being surveyed aperture, region in the aperture measuring 100 holes.
Bond regions account for overall area ratio test equipment and method of testing be: by the application method define bond regions and general
The area of bond regions is added and obtains bond regions area N1, and the gross area of barrier film to be determined is N2, the area proportion of adhesion zone
For N1/N2 × 100%.
As a kind of improvement of the application barrier film, containing binding agent and ceramic particle in coating；In this application, pottery
Ceramic material refers to naturally occurring or synthetic compound through the class Inorganic Non-metallic Materials shaped and high temperature sintering is made.
Compound contained in ceramic particle in the application is the compound containing polar group；Polar group is excellent
Electing hydroxyl as, binding agent is mainly pvdf.Use the ceramic particle containing polar group, make the table of ceramic particle
Face is easier to be combined with the non-solvent of aqueous, and beneficially non-solvent enters coating along ceramic particle diffusion into the surface, thus
At the macropore that is formed about of ceramic particle, promote that macropore is formed.
As a kind of improvement of the application barrier film, the ceramic particle of the application be shaped as polyhedron or spherical, and
Preferably tetrahedron, cuboid, octahedron.The application is found through experiments, and uses and has the polyhedron of corner angle or have three-dimensional structure
Type spherical, relative to from the point of view of flaky material during forming coating, be not likely to produce multiple-level stack, hinder non-solvent with molten
The exchange diffusion of agent.Polyhedral ceramic particle relatively and spherical from the point of view of, it more promotes that non-solvent diffusion effect is higher.
As a kind of improvement of the application barrier film, ceramic particle is selected from boehmite, aluminium sesquioxide powder, hydroxide
Magnesium dust.
As a kind of improvement of the application barrier film, in coating, ceramic material and granule agglomerant mass ratio are 0.5～4:1,
Preferably 1.2～3:1.Under the ceramic particle content of the application, can promote that non-solvent spreads, form more preferable solventnonsolvent
Exchange, thus form macropore.If ceramic particle addition is too low, in film forming procedure, promote solventnonsolvent exchange
Effect deficiency, it is difficult to form macropore；If ceramic particle addition is too high, coating adhesion is low, easily from isolating membrane table
Face is peeled off, and makes breakdown of coating.
As a kind of improvement of the application barrier film, the wet-film thickness of coating with the ratio of the median particle diameter of ceramic particle is
0.5～1.5:1, preferably 0.7～1.1:1.If coating layer thickness is excessive, ceramic particle can not effectively expose coating table
Face, thus can not promote that solventnonsolvent exchanges, thus the effect of enhanced diffustion can not be played, it is difficult to form macroporous structure；It is coated with
Layer thickness is too small, then ceramic particle is largely exposed to coating surface, is easily peeled off, and makes breakdown of coating.
As a kind of improvement of the application barrier film, the median particle diameter of ceramic particle is 1.0～2.5 μm, preferably 1.5 μ
m。
As a kind of improvement of the application barrier film, isolating membrane base material is polyolefin.The polyolefine material of the application is conventional
Polyolefine material.
The application further relates to the preparation method of this lithium ion battery separator, at least comprises the following steps: by binding agent and pottery
Ceramic material granule adds to makes coating fluid in organic solvent, by coating solution on base material, be then immersed in solidification liquid, shape
Becoming to have cated base material, the wet-film thickness of coating is 1～3 μm, preferably 1.4～2.2 μm.
The application uses phase inversion method principle to prepare the coating of barrier film, and wherein, solvent used is oiliness, and PVDF is permissible
It is dissolved in solvent；Non-solvent is aqueous, and PVDF does not dissolves in non-solvent；And solvent and non-solvent dissolve each other.Employing oil-based solvent dissolves
After PVDF, mix with pottery, form coating fluid.By coating solution on isolating membrane, isolating membrane is immersed in non-solvent, occur
Solvent and non-solvent exchange, PVDF is extracted in non-solvent due to solvent, and solidification separates out, and forms coating.Non-solvent and solvent
Pore structure is formed during swapping.
As a kind of improvement of the application preparation method, solvent is selected from NMP, containing deionized water in non-solvent.
As a kind of improvement of the application preparation method, in coating fluid, binding agent is 1:45～50 with the quality of solvent.
As a kind of improvement of the application preparation method, coating fluid and solidification liquid temperature are 15～25 DEG C, and preferably 20
～25 DEG C.
As a kind of improvement of the application preparation method, it is dried after coating/porous substrate is taken out from solidification liquid,
The condition being dried is to dry 30～40min under the conditions of 60～70 DEG C.
As a kind of improvement of the application preparation method, the soak time being immersed in non-solvent by isolating membrane is 10～60
Second；Preferably 20～50 seconds.
In the preparation method of the application, ceramic particle specifically chosen as previously mentioned.
Embodiment 1
A kind of diaphragm for non-water system secondary battery, including barrier film base material and the coating being attached on substrate surface, coating
Top layer includes adhesion zone and electrolyte diffusion region.
The preparation method of the barrier film of the application is:
1, the PVDF system resin KYNAR2851 that ARKEN company produces is dissolved in solvent dimethyl acetylamide making to be coated with
Cloth liquid, the solid content of resin is 5%, and resin is 5:93 with the mass ratio of solvent；Add ceramic particle material, ceramic particle material
Kind, particle diameter, the parameter such as content as shown in table 1；
2, coating fluid use OSB-17 bar coat porous substrate (TN0901:SK company, 9 μ m thick, porosity
43%) on, forming coating fluid coating, coating is as shown in table 1 with the ratio of ceramic particle；
3, coating fluid coating/porous substrate is immersed in deionized water solidification liquid, induce inversion of phases, make coating fluid solidify.
Coating fluid and solidification liquid temperature are 25 DEG C.Enter in solidification liquid after 20s, after coating/porous substrate is taken out from solidification liquid
40min is dried under the conditions of 60 DEG C.
Table 1:
The barrier film prepared is measured and added up porosity and aperture by stereoscan photograph, calculate bond regions and electricity
Solving the area of liquid diffusion region, concrete data are as shown in table 2.
Table 2:
Meanwhile, above-mentioned barrier film employing following methods is prepared as lithium ion battery, and the performance of lithium ion battery is carried out
Detection.
1, the preparation of the original negative pole piece of lithium rechargeable battery
By negative electrode active material graphite and SiOx(weight ratio 1:1, the gram volume of graphite is the mixture of (0 < x < 2)
340mAh/g, first coulombic efficiency are 91%, SiOxThe gram volume of (0 < x < 2) is that 1135mAh/g, first coulombic efficiency are
58.4%), (specific surface area BET is 62m for bonding agent butadiene-styrene rubber, conductive agent conductive carbon black SP2/ g) 92:3:5 in mass ratio with
Solvent N-methyl pyrilidone (NMP) mix homogeneously makes cathode size, afterwards according to 121mg/1540mm2Coat weight will
Cathode size is coated uniformly on the tow sides of porous current collector Copper Foil, forms cathode membrane after then drying at 85 DEG C,
And the water content of cathode membrane is less than 300ppm, then carry out colding pressing, trimming, cut-parts, point bar, welding negative lug, obtain
Width is the original negative pole piece of the lithium rechargeable battery of 160mm.
2, the preparation of the positive plate of lithium rechargeable battery
By positive active material cobalt acid lithium (LiCoO2), binding agent Kynoar (PVDF), conductive agent conductive carbon black SP
(specific surface area BET is 62m2/ g) 97:1.5:1.5 in mass ratio is dissolved in solvent N-methyl pyrilidone (NMP), stirs
Make anode sizing agent, then anode sizing agent is uniformly coated on positive and negative two surfaces of plus plate current-collecting body aluminium foil, afterwards 85
Obtain the positive pole diaphragm of 118 μ m-thick after drying at DEG C, afterwards through colding pressing, cutting into slices, point bar, welding positive pole ear, obtain lithium from
The positive plate of sub-secondary cell.
3, the preparation of the electrolyte of lithium rechargeable battery
By lithium salts LiPF6With non-aqueous organic solvent (ethylene carbonate (EC): diethyl carbonate (DEC): Ethyl methyl carbonate
(EMC): vinylene carbonate (VC)=8:85:5:2, mass ratio) solution formulated for 8:92 in mass ratio is as lithium ion
The electrolyte of secondary cell.
4. the preparation of lithium rechargeable battery
After positive plate, isolating membrane (PE film) and rich lithium cathode sheet winding, obtain naked battery core, afterwards through encapsulation, note
Enter electrolyte, chemical conversion, molding of bleeding, obtain lithium rechargeable battery.
Using the isolating membrane making coating in embodiment to make lithium ion battery, only change isolating membrane, other parts are not done
Change.
Detection method:
High rate performance method of testing:
By 0.7C constant-current charge to 4.4V, stand 10min, with 0.2C constant-current discharge to 3.0V, measure and release electricity note
For Q1.By 0.7C constant-current charge to 4.4V, stand 10min, with 2C constant-current discharge to 3.0V, measure releasing electricity and be designated as Q2.
High rate performance test result is Q2/Q1* × 100%.
Cycle performance method of testing:
By 0.7C constant-current charge to 4.4V, stand 10min；With 1C constant-current discharge to 3.0V, stand 10min, releasing
Electricity is designated as Q3.Using above-mentioned steps as a cycle charge-discharge, carry out 200 circulations.The electricity note that 200th circulation is released
For Q4.Cycle performance test result is Q4/Q3 × 100%.Concrete data are as shown in table 3.
Table 3:
| Barrier film is numbered | High rate performance | Cycle performance |
| 1 | 70.1% | 85.3% |
| 2 | 84.2% | 92.8% |
| 3 | 88.0% | 95.2% |
| 4 | 78.6% | 91.1% |
| 5 | 69.7% | 80.3% |
| 6 | 77.1% | 84.7% |
| 7 | 83.6% | 86.2% |
| 8 | 86.4% | 93.2% |
| 9 | 80.2% | 91.3% |
| 10 | 70.7% | 82.3% |
| 11 | 87.0% | 94.3% |
| 12 | 87.2% | 94.4% |
| 13 | 86.4% | 93.2% |
| 14 | 88.0% | 95.2% |
| 15 | 86.4% | 93.2% |
Comparative example:
Preparing barrier film according to the method for embodiment 1, difference is, adds ceramic particle material, ceramic particle material in barrier film
The parameters such as the kind of material, particle diameter, content are as shown in table 4；
Table 4:
| Barrier film is numbered | Ceramic species | Pottery: weight of binder ratio | Pottery particle diameter: wet-film thickness | Pottery particle diameter |
| D1 | Boehmite/cuboid | 0.2:1 | 0.9:1 | 2μm |
| D2 | Boehmite/cuboid | 5:1 | 0.9:1 | 2μm |
| D3 | Boehmite/cuboid | 2:1 | 0.3:1 | 2μm |
| D4 | Boehmite/cuboid | 2:1 | 2:1 | 2μm |
| D5 | Boehmite/cuboid | 2:1 | 0.9:1 | 3μm |
| D6 | Boehmite/cuboid | 2:1 | 0.9:1 | 0.2μm |
| D7 | Magnesium hydroxide/lamellar | 2:1 | 0.9:1 | 2μm |
The method that above-mentioned barrier film uses the embodiment of the present application 1 is prepared as lithium ion battery, carries out bond regions and electrolyte
The measurement of diffusion region and the detection of performance, observe under a scanning electron microscope, and concrete form measurement result is as shown in table 5；With
Time according to the determination of experimental method high rate performance of embodiment 1 and cycle performance, specific experiment result is as shown in table 6.
Table 5:
Table 6
Although the application is open as above with preferred embodiment, but is not for limiting claim, any this area skill
Art personnel, on the premise of conceiving without departing from the application, can make some possible variations and amendment, therefore the application
Protection domain should be defined in the range of standard with the application claim.
Claims (10)
1. a diaphragm for non-water system secondary battery, including barrier film base material and the coating being attached on described substrate surface, it is special
Levying and be, the top layer of described coating includes that adhesion zone and electrolyte diffusion region, the area of described bond regions mesopore account for described bonding
The percentage ratio of district's gross area is 0～20%, and the area of described electrolyte diffusion region mesopore accounts for the described electrolyte diffusion region gross area
Percentage ratio be 50～90%.
Diaphragm for non-water system secondary battery the most according to claim 1, it is characterised in that the aperture of described adhesion zone is less than
Equal to 100nm, the aperture of described electrolyte diffusion region is 0.3～3 μm.
Diaphragm for non-water system secondary battery the most according to claim 1, it is characterised in that the area of described adhesion zone accounts for institute
State the 25%～30% of the barrier film gross area.
Diaphragm for non-water system secondary battery the most according to claim 1, it is characterised in that containing binding agent in described coating
And ceramic particle, compound contained in described ceramic particle is the compound containing polar group；Described polarity
Group is preferably hydroxyl.
Diaphragm for non-water system secondary battery the most according to claim 4, it is characterised in that the shape of described ceramic particle
Shape is polyhedron or spherical.
Diaphragm for non-water system secondary battery the most according to claim 4, it is characterised in that described ceramic particle is selected from
Boehmite, aluminium sesquioxide powder, magnesium hydroxide powder.
Diaphragm for non-water system secondary battery the most according to claim 4, it is characterised in that ceramic material in described coating
Grain and binding agent mass ratio are 0.5～4:1, preferably 1.2～3:1.
Diaphragm for non-water system secondary battery the most according to claim 4, it is characterised in that the wet-film thickness of described coating with
The ratio of the median particle diameter of ceramic particle is 1:0.5～1.5, preferably 1:0.7～1.1.
Diaphragm for non-water system secondary battery the most according to claim 4, it is characterised in that in described ceramic particle
Value particle diameter is 1.0～2.5 μm, preferably 1.5 μm.
Diaphragm for non-water system secondary battery the most according to claim 1, it is characterised in that the minimal face of described bond regions
Amassing is 2.25 μm2, the minimum area of described electrolyte diffusion region is 2.25 μm2。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737702A (en) * | 2017-07-21 | 2018-02-27 | 上海恩捷新材料科技股份有限公司 | A kind of oiliness coating process and device |
| WO2018205980A1 (en) * | 2017-05-11 | 2018-11-15 | Shanghai Energy New Materials Technology Co., Ltd. | Coating slurries for preparing separators, separators for electrochemical devices and preparation methods therefor |
| WO2019015671A1 (en) * | 2017-07-21 | 2019-01-24 | Shanghai Energy New Materials Technology Co., Ltd. | Processes and apparatus for preparation of separators of electrochemical devices |
| CN109830630A (en) * | 2018-12-29 | 2019-05-31 | 深圳中兴新材技术股份有限公司 | Coating diaphragm with hierarchical porous structure and its preparation method and application |
| CN111341974A (en) * | 2020-03-13 | 2020-06-26 | 江苏厚生新能源科技有限公司 | PVDF (polyvinylidene fluoride) coated diaphragm and preparation method thereof, PVDF coated layer and lithium battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707242A (en) * | 2009-10-14 | 2010-05-12 | 东莞新能源科技有限公司 | Organic/inorganic composite porous isolating membrane |
| CN101872853A (en) * | 2010-04-21 | 2010-10-27 | 东莞新能源电子科技有限公司 | Polymer lithium ion secondary battery and isolating membrane thereof |
| CN102244223A (en) * | 2011-05-26 | 2011-11-16 | 东莞新能源科技有限公司 | Electrochemical device and inorganic/organic composite porous membrane |
| CN104040757A (en) * | 2012-01-18 | 2014-09-10 | 索尼公司 | Separator, battery, battery pack, electronic device, electric vehicle, electricity storage device, and power system |
-
2016
- 2016-08-12 CN CN201610664142.7A patent/CN106207058B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN102244223A (en) * | 2011-05-26 | 2011-11-16 | 东莞新能源科技有限公司 | Electrochemical device and inorganic/organic composite porous membrane |
| CN104040757A (en) * | 2012-01-18 | 2014-09-10 | 索尼公司 | Separator, battery, battery pack, electronic device, electric vehicle, electricity storage device, and power system |
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| CN111341974A (en) * | 2020-03-13 | 2020-06-26 | 江苏厚生新能源科技有限公司 | PVDF (polyvinylidene fluoride) coated diaphragm and preparation method thereof, PVDF coated layer and lithium battery |
| CN111341974B (en) * | 2020-03-13 | 2022-03-11 | 江苏厚生新能源科技有限公司 | PVDF (polyvinylidene fluoride) coated diaphragm and preparation method thereof, PVDF coated layer and lithium battery |
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