CN107611326A - Cyclodextrin ceramic diaphragm coating slurry and lithium ion battery separator and lithium ion battery - Google Patents
Cyclodextrin ceramic diaphragm coating slurry and lithium ion battery separator and lithium ion battery Download PDFInfo
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- CN107611326A CN107611326A CN201710866276.1A CN201710866276A CN107611326A CN 107611326 A CN107611326 A CN 107611326A CN 201710866276 A CN201710866276 A CN 201710866276A CN 107611326 A CN107611326 A CN 107611326A
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- cyclodextrin
- coating slurry
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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 invention provides a kind of cyclodextrin ceramic diaphragm coating slurry, including：Cyclodextrin compounds, wetting agent and ceramic powders.The present invention uses cyclodextrin compounds to reduce the water imbibition that aqueous ceramic powder coats barrier film as aqueous binders, improve the heat resistance and high rate charge-discharge efficiency of lithium ion battery in water paste.And the use of organic solvent is avoided, not only safety and environmental protection, and reduce production cost.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of cyclodextrin ceramic diaphragm coating slurry and
Lithium ion battery separator and lithium ion battery.
Background technology
In lithium-ion battery module, barrier film need to possess compared with macroion conductance as one of lithium ion battery critical material
Rate and mechanical property, so as to effectively prevent battery plus-negative plate from directly contacting to cause short circuit, and battery can be beneficial in discharge and recharge
Ion is allowed freely rapidly to move.Current commercialized polyalkene diaphragm has its intrinsic defect, i.e., when ambient temperature reaches
Barrier film fusing point or more than when, barrier film in itself can occurrence of large-area melting so as to causing the production of internal short-circuit of battery or thermal runaway phenomenon
It is raw, therefore for lithium ion battery separator, the integrality for keeping barrier film is to improve the key of lithium battery security, and for
For porous polyolefin barrier film, because its polarity and organic electrolyte polarity are inconsistent, cause battery in repeated charge process
Middle non-aqueous eletrolyte has poor retentivity to barrier film, so as to influence the later cycles performance of battery.
When applied to field of mobile phones, if mobile phone is under hot conditions for a long time, inside battery heat is not easy to spread, such as
Fruit barrier film poor heat resistance, then barrier film melts, and then sets off an explosion.With the development in the fields such as electric automobile, for lithium-ion electric
The capacity and power of the electrochmical power source system such as pond propose higher requirement, therefore the high rate charge-discharge performance of battery also obtains
It is increasing to pay attention to.The high rate charge-discharge performance of lithium ion battery depends greatly on barrier film.In order to meet lithium
The needs of ion battery high rate charge-discharge development, exploitation highly effective and safe barrier film have turned into the task of top priority of industry.
Currently, ceramic diaphragm is the battery diaphragm of new type of safe, and it is the single or double coated inorganic in battery diaphragm
Ceramic powders such as Al2O3、SiO2、TIO2Deng a kind of feature diaphragm material of the organo-mineral complexing formed.Ceramic coated film
To the wettability of electrolyte, water retainability has a larger lifting, heat resistance and mechanical property also more uncoated ceramic powder
The barrier film at end has enhancing.The binding agent used in ceramic coated film has oiliness binding agent and aqueous binders, oiliness binding agent at present
Organic solvent is needed to use during use, organic solvent volatilization is serious in process of production, it is high to pollute environment, cost,
Make production scene toxicity big, have a strong impact on the health of workshop staff.Aqueous binders are applied to ceramic coated
Barrier film slurry, the production process greenization of ceramic coating membrane can be made, reduce production cost.At present, conventional aqueous binders
Have sodium carboxymethylcellulose/butadiene-styrene rubber (SBR), polyvinyl alcohol (PVA), polyacrylate, gelatin, kayexalate,
Acrylonitrile multiple copolymer (LA) etc..For example, in number of patent application CN201410252166.2, elaborate to use aqueous binders
Polyvinyl alcohol and polyacrylic acid obtain aqueous binders coating slurry with polymer beads blending high-speed stirred, prepared by this method
Coat film improves the heat resistance of barrier film.In number of patent application CN201610233723.5, elaborate to use LA133 conducts
Binding agent, ceramic powders are inorganic insulator, improve the thermal weight loss rate of battery.In number of patent application CN201410327462.4
In, elaborate to use sodium carboxymethylcellulose/butadiene-styrene rubber that aluminum oxide is inorganic particle as binding agent, improve following for battery
Ring performance.
But currently used binding agent generally existing problems with：1. water imbibition is higher, barrier film is easily caused to deposit
During absorb water tacky, cause barrier film dry linting and be not easy to store；2. binding agent heat resistance itself is relatively low, be heated easily decompose or
Adhesive property declines.
The content of the invention
In view of this, the technical problem to be solved in the present invention be to provide a kind of cyclodextrin ceramic diaphragm coating slurry with
And lithium ion battery separator and lithium ion battery, the barrier film coating slurry of preparation have relatively low water imbibition, can improve lithium from
The heat resistance of sub- battery.
To solve above technical problem, the invention provides a kind of cyclodextrin ceramic diaphragm coating slurry, including：
Cyclodextrin compounds, wetting agent and ceramic powders.
Currently preferred, the cyclodextrin compounds are alpha-cyclodextrin, Hydroxyproply-α-cyclodextrin, oxidation-α-ring paste
Essence, sulfonic group-alpha-cyclodextrin, amino-alpha-cyclodextrin, phosphate-alpha-cyclodextrin, carboxyl-alpha-cyclodextrin, beta-schardinger dextrin, hydroxypropyl
Group-beta-cyclodextrin, oxidation-beta-schardinger dextrin, sulfonic acid group-beta-cyclodextrin, amino-beta-cyclodextrin, phosphoric acid group-beta-cyclodextrin, carboxyl-
Beta-schardinger dextrin, gamma-cyclodextrin, hydropropyl-y-cyclodextrin, oxidation-gamma-cyclodextrin, sulfonic group-gamma-cyclodextrin, amino-γ-
Any one or more in cyclodextrin, phosphate-gamma-cyclodextrin and carboxyl-gamma-cyclodextrin.
Preferably, the wetting agent is polyoxyethylated alkyl phenol, polyoxyethylene aliphatic alcohol ether, polyoxyethylene polyoxypropylene
Block copolymer, hyperbranched propenoic acid ester polymer, alkyl epoxy Siloxane-Oxyalkylene Copolymers, polyvinyl alcohol, polyethylene glycol, tell
Gently any one or more in Triton X-100.
Preferably, the ceramic powders be silica, titanium dioxide, aluminum oxide, boehmite, barium titanate, zirconium oxide and
Any one or more in barium monoxide.
The diameter of the ceramic powders is preferably 0.01~5 μm, more preferably 0.02~3 μm.
The present invention is not particularly limited to the preparation method of the cyclodextrin ceramic diaphragm coating slurry, preferably according to
It is prepared by lower section method：
A) cyclodextrin compounds and wetting agent are dissolved in water, obtain solution A；
B) solution A is mixed with ceramic powders, obtains cyclodextrin ceramic diaphragm coating slurry.
It is currently preferred, after obtaining the cyclodextrin ceramic diaphragm coating slurry, crossed 1000~10000 mesh sieves
Net, control slurry particle diameter.
The dosage of the cyclodextrin compounds be preferably cyclodextrin ceramic diaphragm coating slurry 0.5wt%~
5wt%, more preferably 1wt%~3wt%.
The dosage of the wetting agent is preferably 0.05wt%~1wt% of cyclodextrin ceramic diaphragm coating slurry, more excellent
Elect 0.1wt%~0.6wt% as.
The dosage of the ceramic powders is preferably 10wt%~60wt% of cyclodextrin ceramic diaphragm coating slurry, more excellent
Elect 20wt%~40wt% as.
In cyclodextrin ceramic diaphragm coating slurry of the present invention, it can also include well known to those skilled in the art
Other additives or auxiliary material, the present invention is to this and is not particularly limited.
Present invention also offers above-mentioned cyclodextrin ceramic diaphragm coating slurry field of lithium ion battery application.
The invention provides a kind of lithium ion battery separator, coated with above-mentioned cyclodextrin ceramic diaphragm coating slurry.
Present invention also offers a kind of lithium ion battery, including above-mentioned lithium ion battery separator.
The lithium ion battery prepared using cyclodextrin ceramic diaphragm coating slurry provided by the invention, high rate charge-discharge
After efficiency high is heat-treated up to 93%, 90 DEG C, percent thermal shrinkage 3%.
Compared with prior art, the invention provides a kind of cyclodextrin ceramic diaphragm coating slurry, including：Cyclodextrin
Compound, wetting agent and ceramic powders.The present invention prepares ceramic diaphragm coating slurry using cyclodextrin compounds, reduces water-based
Ceramic powders coat the water imbibition of barrier film, improve the heat resistance and high rate charge-discharge efficiency of lithium ion battery.And
The use of organic solvent is avoided, not only safety and environmental protection, and reduce production cost.
Brief description of the drawings
Fig. 1 is the SEM figures of cyclodextrin ceramic diaphragm coating slurry prepared by embodiment 10；
Fig. 2 is the rate charge-discharge loop test result figure after the barrier film assembled battery of embodiment and comparative example.
Embodiment
In order to further illustrate the present invention, cyclodextrin ceramic diaphragm provided by the invention is coated with reference to embodiment
Slurry and lithium ion battery separator and lithium ion battery are described in detail.
Embodiment 1
1) 0.5g alpha-cyclodextrins and 0.05g polyethylene glycol are stirred 10 minutes and are dissolved in 100g deionized waters, it is molten to obtain A
Liquid；
2) a diameter of 0.01 μm of 10g alumina powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 2
1) 5g Hydroxyproply-α-cyclodextrins and 1g polyethylene glycol are stirred 10 minutes and are dissolved in 100g deionized waters, obtain A
Solution；
2) a diameter of 5 μm of 60g SiO 2 powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 1000 eye mesh screens.
Embodiment 3
1) 5g sulfonic groups-alpha-cyclodextrin and 1g polyoxyethylated alkyl phenols are stirred 10 minutes and is dissolved in 100g deionized waters
In, obtain solution A；
2) a diameter of 0.03 μm of 60g barium titanate powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 4
1) 5g amino-alpha-cyclodextrin and 0.5g tweens are stirred 10 minutes and are dissolved in 100g deionized waters, it is molten to obtain A
Liquid；
2) a diameter of 2 μm of 50g alumina powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 2000 eye mesh screens.
Embodiment 5
1) 5g carboxyls-alpha-cyclodextrin and 0.5g polyoxyethylene aliphatic alcohol ethers are stirred 10 minutes and is dissolved in 100g deionized waters
In, obtain solution A；
2) a diameter of 2 μm of 60g boehmite powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 2000 eye mesh screens.
Embodiment 6
1) aoxidize 4g-alpha-cyclodextrin and 0.5g polyoxyethylene aliphatic alcohol ethers stir 10 minutes and be dissolved in 100g deionized waters
In, obtain solution A；
2) a diameter of 2 μm of 60g barium oxide powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 2000 eye mesh screens.
Embodiment 7：
1) 4g phosphates-alpha-cyclodextrin and 0.2g polyoxyethylene polyoxypropylene block copolymers are stirred 10 minutes and are dissolved in
In 100g deionized waters, solution A is obtained；
2) a diameter of 4 μm of 30g Zirconium oxide powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 1000 eye mesh screens.
Embodiment 8：
1) 4g beta-schardinger dextrins and 0.2g hyperbranched propenoic acids ester polymer are stirred 10 minutes and is dissolved in 100g deionized waters
In, obtain solution A；
2) a diameter of 0.05 μm of 30g barium titanate powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 9：
1) 4g hydroxypropyl-β-cyclodextrins and 0.2g alkyl epoxies Siloxane-Oxyalkylene Copolymers are stirred 10 minutes and are dissolved in
In 100g deionized waters, solution A is obtained；
2) a diameter of 2 μm of 30g boehmite powder is added in clear solution A, stirs 30 minutes and forms mixed slurry；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 2000 eye mesh screens.
Embodiment 10：
1) aoxidize 4g-beta-schardinger dextrin and 0.2g polyethylene glycol stir 10 minutes and be dissolved in 100g deionized waters, obtain A
Solution；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Microscopic sdIBM-2+2q.p.approach is carried out to the aqueous ceramic barrier film slurry of preparation, its SEM is schemed as shown in figure 1, applying as seen from Figure 1
Clad surface is smooth, has loose and porous structure.
Embodiment 11：
1) 4g sulfonic acid group-beta-cyclodextrin and 0.2g Triton X-100s are stirred be dissolved within 10 minutes 100g go from
In sub- water, solution A is obtained；
2) a diameter of 0.05 μm of 30g SiO 2 powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 12：
1) 4g amino-betas-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtain A
Solution；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 13：
1) 4g phosphoric acid group-beta-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
To solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 14：
1) 4g carboxylics group-beta-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtain A
Solution；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 15：
1) 4g gamma-cyclodextrins and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, it is molten to obtain A
Liquid；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 16：
1) 4g hydropropyl-y-cyclodextrins and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
To solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 17：
1) aoxidize 4g-gamma-cyclodextrin and 0.2g polyvinyl alcohol stir 10 minutes and be dissolved in 100g deionized waters, obtain
Solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 18：
1) 4g sulfonic groups-gamma-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
To solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 19：
1) 4g amino-gamma-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
Solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 20：
1) 4g phosphates-gamma-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
To solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 21：
1) 4g carboxyls-gamma-cyclodextrin and 0.2g polyvinyl alcohol are stirred 10 minutes and are dissolved in 100g deionized waters, obtained
Solution A；
2) a diameter of 0.05 μm of 30g titania powder is added in clear solution A, stirs 30 minutes and forms mixing slurry
Material；
3) mixed slurry and then by step 2) obtained produces aqueous ceramic barrier film slurry after crossing 10000 eye mesh screens.
Embodiment 22
Positive electrode uses cobalt acid lithium, and negative material uses graphite, and the embodiment 9 that about 3 μm of membrane surface coating thickness is made
Standby aqueous ceramic slurry coating, is prepared lithium ion battery.
Comparative example 1
Using the method for embodiment 22, positive electrode uses cobalt acid lithium, and negative material uses graphite, membrane surface coating thickness
The polyvinyl alcohol (PVA) of about 20 μm of degree, prepares lithium ion battery.
Comparative example 2
Positive electrode uses cobalt acid lithium, and negative material uses graphite, and barrier film selects uncoated basement membrane, conventional wet lay process system
Make battery.
The battery prepared to embodiment 22, comparative example 1~2, rate charge-discharge loop test is carried out, Fig. 2 is as a result seen, by scheming
2 as can be seen that under 8C multiplying powers, and the specific discharge capacity of hydroxypropyl-β-cyclodextrin adhesive coated film is compared with 0.5C, conservation rate
For 87%, and PVA and wet method film are respectively 80% and 75%, the specific discharge capacity of hydroxypropyl-β-cyclodextrin adhesive coated film
7% and 12% is respectively increased than PVA and wet method film.Obviously compare by the coat film of binding agent of cyclodextrin under high rate charge-discharge
Capacity is greatly improved.
The barrier film of the aqueous ceramic slurry coating prepared respectively to the embodiment 9 of about 3 μm of surface coating thickness (is designated as coating
Film), and uncoated barrier film (being designated as basement membrane) progress heat resistance test, it the results are shown in Table 1.
The heat resistance of table 1 is tested
| Material | Percent thermal shrinkage/% (90 DEG C of heat treatment) |
| Basement membrane | 13 |
| Coat film | 3 |
As can be seen from Table 1, after being coated with barrier film slurry prepared by the present invention, the heat resistance of barrier film greatly promotes.
From above-described embodiment and comparative example, prepared using cyclodextrin ceramic diaphragm coating slurry provided by the invention
Lithium ion battery, there is higher heat resistance and high rate charge-discharge efficiency.
The explanation of above example is only intended to help the method and its core concept for understanding the present invention.It should be pointed out that pair
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
Claims (10)
- A kind of 1. cyclodextrin ceramic diaphragm coating slurry, it is characterised in that including：Cyclodextrin compounds, wetting agent and ceramic powders.
- 2. cyclodextrin ceramic diaphragm coating slurry according to claim 1, it is characterised in that the cyclodextrin chemical combination Thing is alpha-cyclodextrin, Hydroxyproply-α-cyclodextrin, oxidation-alpha-cyclodextrin, sulfonic group-alpha-cyclodextrin, amino-alpha-cyclodextrin, phosphoric acid Base-alpha-cyclodextrin, carboxyl-alpha-cyclodextrin, beta-schardinger dextrin, hydroxypropyl-β-cyclodextrin, oxidation-beta-schardinger dextrin, sulfonic group-β-ring Dextrin, amino-beta-cyclodextrin, phosphoric acid group-beta-cyclodextrin, carboxylic group-beta-cyclodextrin, gamma-cyclodextrin, hydropropyl-y-cyclodextrin, Oxidation-gamma-cyclodextrin, sulfonic group-gamma-cyclodextrin, amino-gamma-cyclodextrin, phosphate-gamma-cyclodextrin and carboxyl-γ-ring paste Any one or more in essence.
- 3. cyclodextrin ceramic diaphragm coating slurry according to claim 1, it is characterised in that the wetting agent is polyoxy Vinyl alkyl phenolic ether, polyoxyethylene aliphatic alcohol ether, polyoxyethylene polyoxypropylene block copolymer, hyperbranched propenoic acid polyisocyanate polyaddition Appointing in thing, alkyl epoxy Siloxane-Oxyalkylene Copolymers, polyvinyl alcohol, polyethylene glycol, tween and Triton X-100 Meaning is one or more.
- 4. cyclodextrin ceramic diaphragm coating slurry according to claim 1, it is characterised in that the ceramic powders are two Any one or more in silica, titanium dioxide, aluminum oxide, boehmite, barium titanate, zirconium oxide and barium monoxide.
- 5. cyclodextrin ceramic diaphragm coating slurry according to claim 1, it is characterised in that the ceramic powders it is straight Footpath is 0.01~5 μm.
- 6. cyclodextrin ceramic diaphragm coating slurry according to claim 1, it is characterised in that make in accordance with the following methods It is standby：A) cyclodextrin compounds and wetting agent are dissolved in water, obtain solution A；B) solution A is mixed with ceramic powders, obtains cyclodextrin ceramic diaphragm coating slurry.
- 7. cyclodextrin ceramic diaphragm coating slurry according to claim 6, it is characterised in that the cyclodextrin chemical combination Thing is 0.5wt%~5wt% of cyclodextrin ceramic diaphragm coating slurry, and the wetting agent coats for cyclodextrin ceramic diaphragm 0.05wt%~1wt% of slurry.
- 8. cyclodextrin ceramic diaphragm coating slurry according to claim 6, it is characterised in that the ceramic powders are ring 10wt%~60wt% of dextrin class ceramic diaphragm coating slurry.
- 9. a kind of lithium ion battery separator, it is characterised in that coated with the cyclodextrin pottery described in any one of claim 1~8 Porcelain barrier film coating slurry.
- 10. a kind of lithium ion battery, it is characterised in that including the lithium ion battery separator described in claim 9.
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| CN108417762A (en) * | 2018-02-28 | 2018-08-17 | 北京国能电池科技股份有限公司 | Lithium ion battery separator and preparation method thereof, lithium ion battery |
| CN109244325A (en) * | 2018-09-25 | 2019-01-18 | 合肥先杰新能源科技有限公司 | lithium battery diaphragm and preparation method thereof |
| CN110028323A (en) * | 2019-03-08 | 2019-07-19 | 国装新材料技术(江苏)有限公司 | Supermolecule ceramic forerunner based on cyclodextrin inclusion complex and preparation method thereof |
| CN110408075A (en) * | 2019-08-28 | 2019-11-05 | 广东工业大学 | A kind of composite isolated film and preparation method thereof |
| CN110518176A (en) * | 2019-07-05 | 2019-11-29 | 高芳 | A kind of preparation method of the compound diaphragm of ceramic coated PE |
| CN116042022A (en) * | 2023-03-30 | 2023-05-02 | 江苏正力新能电池技术有限公司 | Explosion-proof coating and application thereof in sodium ion battery |
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| CN110518176A (en) * | 2019-07-05 | 2019-11-29 | 高芳 | A kind of preparation method of the compound diaphragm of ceramic coated PE |
| CN110408075A (en) * | 2019-08-28 | 2019-11-05 | 广东工业大学 | A kind of composite isolated film and preparation method thereof |
| CN110408075B (en) * | 2019-08-28 | 2022-04-19 | 广东工业大学 | Composite isolation membrane and preparation method thereof |
| CN116042022A (en) * | 2023-03-30 | 2023-05-02 | 江苏正力新能电池技术有限公司 | Explosion-proof coating and application thereof in sodium ion battery |
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