CN109004152A - Electrode-supported anodic aluminium oxide membrane and preparation method thereof - Google Patents
Electrode-supported anodic aluminium oxide membrane and preparation method thereof Download PDFInfo
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- CN109004152A CN109004152A CN201810687307.1A CN201810687307A CN109004152A CN 109004152 A CN109004152 A CN 109004152A CN 201810687307 A CN201810687307 A CN 201810687307A CN 109004152 A CN109004152 A CN 109004152A
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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
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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 present invention provides a kind of electrode-supported anodic aluminium oxide membrane and preparation method thereof, anodic aluminium oxide membrane by following parts by weight material composition: (800-1200) part ceramic powder and (80-140) part binder；Wherein, ceramic powder is mixed by the particle of particle diameter distribution two kinds between 200nm and 80 μm and two or more different-grain diameters; and the ratio that micron-sized particle accounts for ceramic powder total weight is (60-90) %, and the ratio for accounting for ceramic powder total weight of nano-scale particle is (10-40) %.The present invention obtains the slurry of debita spissitudo, while controlling the solid content of slurry, makes the inorganic ceramic membrane thicknesses coated in lithium ion cell electrode on piece uniformly and porosity is higher by mixing inorganic ceramic powder with the glue of a small amount of binder.Further, the partial size of inorganic ceramic powder particle is screened, advantageously reduces the thickness of inorganic ceramic membrane, so that final anodic aluminium oxide membrane thickness obtained is conducive to the energy density for improving lithium ion battery up to 15~60 μm.
Description
Technical field
The present invention relates to technical field of lithium ion, in particular to a kind of electrode-supported anodic aluminium oxide membrane and its
Preparation method.
Background technique
Because having the advantages that operating voltage is high, energy density is big, it is low with self discharge etc. to have extended cycle life, lithium ion battery is had become
For main force's power supply of all kinds of portable electronic products, and diaphragm is the critical material of lithium ion battery.Lithium ion battery separator material
Must have: non-electronic conductor, chemical stability be good, electrolyte resistance burn into mechanical strength is big, have extended cycle life, absorbency and
The features such as liquid retention is good.Diaphragm has a very important role to the comprehensive performance for improving battery.The lithium ion being commercialized at present
Battery diaphragm is mainly polyethylene (PE), polypropylene (PP) microporous barrier.But polyalkene diaphragm is also defective, on the one hand works as the external world
When temperature meets or exceeds diaphragm fusing point, diaphragm itself meeting occurrence of large-area is shunk or is melted so as to cause inside battery thermal runaway
The generation of phenomenon or short circuit, therefore keeping the size and shape of diaphragm constant is the key that improve battery security.On the other hand,
The compatibility of they and electrolyte is not very ideal, and needs modified optimization.The compatibility and electrolyte of diaphragm and electrolyte exist
Absorption and holding in diaphragm is related, affects capacity, multiplying power and the cycle performance of battery.Compatibility is better, these electrochemistry
Performance is better.In addition, it is developed organo-mineral complexing diaphragm, polymer electrolyte diaphragm etc., but these diaphragm materials
There are still thermal stability it is poor, ionic conductivity is poor the problems such as.
Compared with traditional organic barrier film, the anodic aluminium oxide membrane cost of raw material is cheap, can significantly lower the cost of diaphragm；It is mechanical
Intensity is high, and Li dendrite is difficult to penetrate；Heat resisting temperature is high, and the integrality of structure can be still kept at 400 DEG C；Electrolyte compatibility is good,
The wherein presence of the nano inorganic particle of a large amount of high porosity high-specific surface areas can improve the Electolyte-absorptive and liquid retention of diaphragm
Energy.Anodic aluminium oxide membrane is divided into self-cradling type anodic aluminium oxide membrane and electrode-supported anodic aluminium oxide membrane again, and self-cradling type anodic aluminium oxide membrane prepares work
Skill is complicated, forms a film thicker, generally higher than 100 μm, and with existing lithium ion battery production process equipment poor compatibility, it is difficult to realize
Commercial size application.And electrode-supported anodic aluminium oxide membrane, it is to be applied directly to inorganic slurry on electrodes of lithium-ion batteries, shape
At anodic aluminium oxide membrane combination electrode, the positive/negative plate after applying diaphragm is directly combined into battery core, and completes fluid injection, it can be achieved that scale
Production, therefore, developing electrode support type anodic aluminium oxide membrane is the main trend of current anodic aluminium oxide membrane technology.
But electrode-supported anodic aluminium oxide membrane is mainly made of inorganic ceramic particle, traditional ceramic coating membrane, selection
Nano Ceramic Particles mainly based on nanometer, are coated on organic PP or PE diaphragms, form one layer of pottery by ceramic particle size
Porcelain coating, and electrode-supported anodic aluminium oxide membrane, are that inorganic ceramic slurry is applied directly on battery pole piece, this partial size mistake
The presence of small, high-specific surface area nano inorganic particle, though diaphragm Electolyte-absorptive can be improved and protect the performance of liquid, simultaneously
It may penetrate into pole piece, block the transmission channel of lithium ion, seriously affect the chemical property of battery；If particle diameter mistake
Greatly, then it is difficult to form a film again, and anodic aluminium oxide membrane itself is for polymer separators, flexibility is poor, holds under external force
Generation that is broken and leading to safety problem easily occurs.
Summary of the invention
In consideration of it, the invention proposes a kind of electrode-supported anodic aluminium oxide membranes and preparation method thereof, it is intended to solve existing nothing
Machine diaphragm and the poor problem of lithium battery pole slice matching.
Specifically, first aspect present invention proposes a kind of electrode-supported anodic aluminium oxide membrane, and the anodic aluminium oxide membrane is by following
The material composition of parts by weight: (800-1200) part ceramic powder and (80-140) part binder；Wherein, the ceramic powder is by partial size point
The particle of two kind and two or more different-grain diameter of the cloth between 200nm and 80 μm mixes, and described micron-sized
The ratio that grain accounts for the ceramic powder total weight is (60-90) %, the ratio for accounting for the ceramic powder total weight of the nano-scale particle
Example is (10-40) %.As shown in Figure 1, the particle diameter distribution of ceramic powders can be rendered as bimodal or multi-modal.
Specifically, ceramic powder is α-Al2O3、SiO2、CaCO3、ZrO2And TiO2At least one of.Can be preferably
SiO2、α-Al2O3And ZrO2One of, further preferably α-Al2O3.Binder is selected from polyvinyl alcohol, polyethylene, poly- third
At least one of alkene, Kynoar, polyimides, polyethylene oxide and polyacrylonitrile.It can alleviate ceramic powder slurry
During coated in battery pole piece the phenomenon that battery pole piece volume expansion, so as to avoid ceramic powder particles from battery pole piece
On the phenomenon that falling off.Ceramic powder and binder in the embodiment of the present invention are commercial product, do not do any restriction to its source.
When it is implemented, the weight ratio of ceramic powder and binder and dispersing agent can preferably (800-1000): (100-
120)。
Further, in above-mentioned electrode-supported anodic aluminium oxide membrane, the partial size is the pottery of (1-10) μm and (200-600) nm
The mass ratio of porcelain powder particles is (10-20): (2-4).Preferably, partial size is 3 μm and the mass ratio of the ceramic powder particles of 500nm is
17:3.Such as the ceramic powder α-Al in 1kg2O3In, can select 850g partial size is 3 μm of α-Al2O3Particle, 150g partial size are
α-the Al of 200nm2O3Particle.
It is further preferred that partial size is (20-80) μm, the quality of the ceramic powder particles of (1-10) μm and (200-600) nm
Than for (10-15): (2-4): (2-4).It is furthermore preferred that the mass ratio that partial size is the ceramic powder particles of 80 μm, 2 μm and 600nm is
13:4:3.Such as the ceramic powder SiO in 1kg2In, can select 650g partial size is 80 μm of SiO2Particle, 200g partial size are 2 μm
SiO2The SiO that particle and 150g partial size are 600nm2Particle.
The electrode-supported anodic aluminium oxide membrane material that first aspect present invention provides, by bonding inorganic ceramic powder with a small amount of
The glue of agent mixes, and obtains the slurry of debita spissitudo, while controlling the solid content of slurry, makes to be coated in lithium ion cell electrode piece
On inorganic ceramic membrane thicknesses uniformly and porosity it is higher, easily infiltrated by electrolyte, reduce activation polarization, be conducive to prolong
The service life of long battery.Further, the partial size of inorganic ceramic powder particle is screened, advantageously reduces inorganic ceramic membrane
Thickness so that final obtained anodic aluminium oxide membrane thickness up to 15~60 μm, is conducive to improve the energy density of lithium ion battery；
In addition, ceramic powder material used in the embodiment of the present invention is cheap and easy to get and has thermal stability, have the function of it is fire-retardant, and it is existing
Organic barrier film in technology, which is compared, has very big security advantages.
Second aspect of the present invention provides a kind of preparation method of electrode-supported anodic aluminium oxide membrane, comprising the following steps:
Step S1 is mixed according to the ceramic powder that preset ratio weighs certain mass different-grain diameter.
Specifically, ceramic powder is α-Al2O3、SiO2、CaCO3、ZrO2And TiO2At least one of.Can be preferably
SiO2、CaCO3And ZrO2One of or a variety of, further preferably SiO2.Wherein, no matter ceramic powder be one-component or
Various ingredients mixing, is made of the particle of different-grain diameter.When ceramic powder is multicomponent, the dosage of different component can basis
Actual conditions determine, meet preset particle diameter distribution.The particle diameter distribution of bulky grain ceramic powder can be preferably (1-80) μm,
The particle diameter distribution of little particle ceramic powder can preferably (200-500) nm.In order to improve the porosity of the diaphragm finally prepared, have
When body is implemented, partial size is (1-10) μm and the mass ratio of the ceramic powder particles of (200-600) nm is (10-20): (2-4), can be excellent
It is selected as (15-20): (3-4).It is further preferred that partial size is 3 μm and the mass ratio of the ceramic powder particles of 500nm is 17:3.Example
Such as in the ceramic powder of 1kg, can select 850g partial size is 3 μm of α-Al2O3Particle, 150g partial size are the α-Al of 500nm2O3
Particle.It is further preferred that partial size is (20-80) μm, the mass ratio of the ceramic powder particles of (1-10) μm and (200-600) nm is
(10-15): (2-4): (2-4).It is furthermore preferred that the mass ratio that partial size is the ceramic powder particles of 80 μm, 2 μm and 600nm is 13:4:
3。
Step S2 takes appropriate binder and is each configured to certain density sol solution.
Specifically, the sol solution of water configuration binder can be added, the mass concentration of binder in the sol solution of binder
For (5-20) %, preferably 5%.Step S3 mixes the sol solution of the ceramic powder and the binder according to preset ratio
Slurry is obtained, be dispersed and is stirred a period of time, inorganic ceramic coating suspension is obtained.
Specifically, water can be added, which to adjust the solid of substance in slurry, contains value, the amount that water is added can be according to actual requirement
Gu being determined containing value, Gu can be preferably (60-70) % containing value, the time of stirring can be (2-6) h, by adequately stirring
Mixing can enable ceramic powder to be uniformly dispersed in binder solution, and the inorganic ceramic coating for being conducive to be made high dispersive is suspended
Liquid.In order to form evenly dispersed inorganic ceramic slurry, ultrasonic wave dispersion and churned mechanically mode can be used various objects
Matter is uniformly mixed.
Step S4, by inorganic ceramic coating suspension with the application temperature of (50-70) DEG C and (1-5) m/min
Coating speed is coated on battery pole piece surface, and by the battery pole piece be placed in temperature be (30~70) DEG C and humidity for (50~
80) dry (6~12) h under conditions of %, can be obtained electrode-supported anodic aluminium oxide membrane.
Specifically, application temperature can be preferably 60 DEG C, coating speed can be preferably 2m/min.The battery pole piece
Drying condition can be preferred are as follows: temperature (40-60) DEG C, such as 40 DEG C, 50 DEG C and 60 DEG C；Humidity (60-70) %, such as
60%, 65%, 70%；Drying time (8-10) h, such as 8h, 9h and 10h.
The preparation method for the electrode-supported anodic aluminium oxide membrane that second aspect of the present invention provides, by inorganic ceramic powder partial size
Screening and the slurry that is mixed into of ceramic powder binder and dispersing agent three in substance solid content adjustment after, by being suitble to
Coating process by above-mentioned inorganic ceramic slurry be coated on lithium ion cell electrode on, prepare uniformly and the higher nothing of voidage
Machine diaphragm, preparation process is simple, energy continuous production, practical and lower production costs on production line.
Detailed description of the invention
Fig. 1 is the ceramic powder α-Al of multi-modal in the embodiment of the present invention 12O3With the ceramic powder of Unimodal Distribution in comparative example
α-Al2O3Particle diameter distribution comparison diagram；
Fig. 2 a is the ceramic powder α-Al by multi-modal in the embodiment of the present invention 12O3The structure chart of the anodic aluminium oxide membrane of preparation；
Fig. 2 b is the ceramic powder α-Al of Unimodal Distribution in comparative example2O3The structure chart of the anodic aluminium oxide membrane of preparation.
Specific embodiment
The following is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvement and modification are also considered as
Protection scope of the present invention.
Embodiment 1
Choose the ceramic powder α-Al of 1kg2O3, 3 μm of partial size mixed according to the ratio of 850g:150g respectively with the ceramic powder of 200nm
It closes；
It takes appropriate polyvinyl alcohol soluble in water, is configured to the PVA aqueous solution that 120g mass concentration is 5%；By ceramic powder
Al2O3After being mixed with PVA aqueous solution, the solid content value of 333g water adjustment slurry is added to 50%, after mechanical stirring 2h, is obtained
Uniform and stable high dispersive inorganic ceramic coats suspension；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 60 DEG C, is walked
Speed is 2m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 60 DEG C and
Dry 8h, obtains with a thickness of the anodic aluminium oxide membrane of 10 μm of electrode-supporteds under 50% humidity.
Embodiment 2
Choose the ceramic powder α-Al of 1000g2O3, 80 μm of partial size, 2 μm with the ceramic powder of 600nm respectively according to 650g:200g:
150g, ratio mixing；
It takes appropriate polyvinyl alcohol (PVA) soluble in water, is configured to the PVA aqueous solution that 110g mass concentration is 10%；It will pottery
Porcelain powder Al2O3After being mixed with PVA aqueous solution, then plus 450g water adjustment slurry solid content value to 60%, after mechanical stirring 4h, obtain
Suspension is coated to uniform and stable high dispersive inorganic ceramic；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 50 DEG C, is walked
Speed is 1m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 30 DEG C and
Dry 12h, obtains with a thickness of the anodic aluminium oxide membrane of 15 μm of electrode-supporteds under 70% humidity.
Embodiment 3
Choose the ceramic powder SiO of 1000g2, 2 μm of partial size mixed according to the ratio of 600g:400g respectively with the ceramic powder of 300nm
It closes；
It takes appropriate polyethylene soluble in water, is configured to the polyethylene aqueous solution that 120g mass concentration is 12%；By ceramic powder
SiO2After being mixed with polyethylene aqueous solution, the solid content value of 300g water adjustment slurry is added to 70%, after mechanical stirring 6h, is obtained
Suspension is coated to uniform and stable high dispersive inorganic ceramic；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 70 DEG C, is walked
Speed is 3m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 70 DEG C and
Dry 10h, obtains with a thickness of the anodic aluminium oxide membrane of 30 μm of electrode-supported under 80% humidity.
Embodiment 4
Choose the ceramic powder SiO of 700g2With ZrO2Mixture, the ceramic powder of 10 μm of partial size, 200nm and 400nm presses respectively
According to the ratio mixing of 490g:100g:110g；
It takes appropriate polyvinyl alcohol (PVA) soluble in water, is configured to the PVA aqueous solution that 100g mass concentration is 15%；It will pottery
After porcelain powder mixture is mixed with PVA aqueous solution, the solid content value of 350g water adjustment slurry is added to 75%, mechanical stirring 2h
Afterwards, uniform and stable high dispersive inorganic ceramic coating suspension is obtained；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 60 DEG C, is walked
Speed is 4m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 40 DEG C and
Dry 8h, obtains with a thickness of the anodic aluminium oxide membrane of 60 μm of electrode-supported under 60% humidity.
Embodiment 5
Choose the ceramic powder α-Al of 800g2O3, 3 μm of partial size, 1 μm with the ceramic powder of 500nm respectively according to 340g:300g:
The ratio of 160g mixes；
It takes appropriate Kynoar soluble in water, is configured to the polyvinylidene fluoride aqueous solution that 120g mass concentration is 20%；
By ceramic powder α-Al2O3After mixing with polyvinylidene fluoride aqueous solution, the solid content value of 400g water adjustment slurry is added to 60%,
After mechanical stirring 3h, uniform and stable high dispersive inorganic ceramic coating suspension is obtained；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 70 DEG C, is walked
Speed is 2m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 50 DEG C and
Dry 8h, obtains with a thickness of the anodic aluminium oxide membrane of 80 μm of electrode-supported under 70% humidity.
Embodiment 6
Choose the ceramic powder TiO of 900g2, the ceramic powder of 80 μm of partial size, 300nm and 500nm is respectively according to 810g:40g:
The ratio of 50g mixes；
It takes appropriate polypropylene soluble in water, is configured to the polypropylene aqueous solution that 110g mass concentration is 5%；By ceramic powder
TiO2After being mixed with polypropylene aqueous solution, the solid content value of 500g water adjustment slurry is added to 65%, after mechanical stirring 4h, is obtained
Suspension is coated to uniform and stable high dispersive inorganic ceramic；
High dispersive inorganic ceramic coating suspension is poured into trough of coating machine, the temperature that coating machine is arranged is 50 DEG C, is walked
Speed is 5m/min, and inorganic ceramic coating suspension is coated on coiled battery pole piece surface, and by battery pole piece in 60 DEG C and
Dry 10h, obtains with a thickness of the anodic aluminium oxide membrane of 10 μm of electrode-supported under 80% humidity.
Comparative example 1
Using the ceramic powder Al of Unimodal Distribution in the prior art2O3It is coated with the mixed slurries of binder as slurry
Anodic aluminium oxide membrane is prepared to the surface of battery pole piece.
Particle diameter distribution in anodic aluminium oxide membrane in the embodiment of the present invention 1 and comparative example is tested, by Fig. 1, Fig. 2 a and
Fig. 2 b can be seen that Al in comparative example2O3Ceramic diaphragm powder diameter be D50 be 10 microns normal state Unimodal Distribution particle, at
Film effect is poor.In the embodiment of the present invention 1, prepare slurry using in the ceramic powder particles of bimodal distribution, finally prepare it is inorganic every
Film thickness is uniform, not easily to fall off.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (13)
1. a kind of electrode-supported anodic aluminium oxide membrane, which is characterized in that the anodic aluminium oxide membrane by following parts by weight material composition:
(800-1200) part ceramic powder and (80-140) part binder；Wherein, the ceramic powder by particle diameter distribution 200nm and 80 μm it
Between two kinds and the particles of two or more different-grain diameters mix, and the micron-sized particle accounts for the ceramic powder gross weight
The ratio of amount is (60-90) %, and the ratio for accounting for the ceramic powder total weight of the nano-scale particle is (10-40) %.
2. electrode-supported anodic aluminium oxide membrane according to claim 1, which is characterized in that the partial size be (1-10) μm and
The mass ratio of the ceramic powder particles of (200-600) nm is (10-20): (2-4).
3. electrode-supported anodic aluminium oxide membrane according to claim 1 or 2, which is characterized in that the partial size be 3 μm and
The mass ratio of the ceramic powder particles of 200nm is 17:3.
4. electrode-supported anodic aluminium oxide membrane according to claim 1 or 2, which is characterized in that the partial size is (20-80) μ
M, the mass ratio of the ceramic powder particles of (1-10) μm and (200-600) nm is (10-15): (2-4): (2-4).
5. electrode-supported anodic aluminium oxide membrane according to claim 4, which is characterized in that the partial size be 80 μm, 2 μm and
The mass ratio of the ceramic powder particles of 600nm is 13:4:3.
6. electrode-supported anodic aluminium oxide membrane according to claim 1 or 2, which is characterized in that the ceramic powder is α-Al2O3、
SiO2、CaCO3、ZrO2And TiO2At least one of.
7. electrode-supported anodic aluminium oxide membrane according to claim 1 or 2, which is characterized in that the binder is selected from poly- second
At least one of enol, polyethylene, polypropylene, Kynoar, polyimides, polyethylene oxide and polyacrylonitrile.
8. a kind of preparation method of such as electrode-supported anodic aluminium oxide membrane of any of claims 1-7, which is characterized in that
The following steps are included:
Step (1), is mixed according to the ceramic powder that preset ratio weighs certain mass different-grain diameter；
Step (2) takes appropriate binder and is each configured to certain density sol solution；
The sol solution of the ceramic powder and the binder is mixed to get slurry according to preset ratio by step (3), be dispersed and
Stirring a period of time obtains inorganic ceramic coating suspension；
Step (4), by inorganic ceramic coating suspension with the coating of the application temperature of (50-70) DEG C and (1-5) m/min
Speed is coated on battery pole piece surface, and the battery pole piece is placed in temperature be (30~70) DEG C and humidity is (50~80) %
Under conditions of dry (6~12) h, electrode-supported anodic aluminium oxide membrane can be obtained.
9. the preparation method of electrode-supported anodic aluminium oxide membrane according to claim 8, which is characterized in that the step (2)
In, the mass concentration of binder is (5-20) % in the sol solution of binder.
10. the preparation method of electrode-supported anodic aluminium oxide membrane according to claim 8, which is characterized in that the step (3)
In, ceramic powder and binder account for the weight ratio of the slurry total amount as (90-99.5) %:(0.5-10) %.
11. the preparation method of electrode-supported anodic aluminium oxide membrane according to claim 8, which is characterized in that the step (4)
In, application temperature is 60 DEG C, coating speed 2m/min.
12. the preparation method of electrode-supported anodic aluminium oxide membrane according to claim 8, which is characterized in that the step (4)
In, the drying condition of the battery pole piece is as follows: temperature (40-60) be DEG C, humidity be (60-70) %, drying time be (8-
10)h。
13. the preparation method of electrode-supported anodic aluminium oxide membrane according to claim 8, which is characterized in that the step (4)
In, the porosity of obtained electrode-supported anodic aluminium oxide membrane is 35%-80%.
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| CN109742292A (en) * | 2018-12-17 | 2019-05-10 | 中国电力科学研究院有限公司 | A kind of preparation method, battery core and the lithium ion battery of anodic aluminium oxide membrane type lithium ion battery |
| CN109755634A (en) * | 2018-12-17 | 2019-05-14 | 中国电力科学研究院有限公司 | A kind of preparation method, battery core and the lithium ion battery of anodic aluminium oxide membrane type lithium ion battery |
| CN109755440A (en) * | 2018-12-17 | 2019-05-14 | 中国电力科学研究院有限公司 | A kind of preparation method, battery core and the lithium ion battery of low temperature resistant anodic aluminium oxide membrane type lithium ion battery |
| CN109802072A (en) * | 2018-12-17 | 2019-05-24 | 中国电力科学研究院有限公司 | A kind of preparation method of electrode-supported anodic aluminium oxide membrane compound electric pole piece |
| CN112563666A (en) * | 2020-12-18 | 2021-03-26 | 芯科众联新材料(常州)有限公司 | Mixed amphiprotic agent of small-particle alumina powder and large-particle alumina powder and process flow |
| CN114050376A (en) * | 2021-10-21 | 2022-02-15 | 东风汽车集团股份有限公司 | Double-layer electrode supported inorganic diaphragm and preparation method thereof |
| CN116218306A (en) * | 2023-03-21 | 2023-06-06 | 济南天盟新材料科技有限公司 | Protective coating for lithium ion battery slurry stirring equipment and preparation method |
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