CN103468208A - Abrasive and coating slurry of lithium-ion power battery diaphragm and preparation methods thereof - Google Patents
Abrasive and coating slurry of lithium-ion power battery diaphragm and preparation methods thereof Download PDFInfo
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- CN103468208A CN103468208A CN2013104394652A CN201310439465A CN103468208A CN 103468208 A CN103468208 A CN 103468208A CN 2013104394652 A CN2013104394652 A CN 2013104394652A CN 201310439465 A CN201310439465 A CN 201310439465A CN 103468208 A CN103468208 A CN 103468208A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides an abrasive and coating slurry of a lithium-ion power battery diaphragm and preparation methods thereof. The coating slurry comprises 10-25% of chemical binder, 1-3% of thickening agent, 25-55% of abrasive slurry, 0.1-0.3% of defoaming agent, 0.1-0.3% of wetting agent, 0.1-0.3% of dispersing agent and 0.1-0.3% of levelling agent by w/w. The abrasive, the coating slurry and the preparation methods have the beneficial effects that the costs of the abrasive slurry and the coating slurry can be greatly reduced by adopting cheap silicon carbide as a main raw material of the abrasive slurry or the coating slurry; relative to lithium-ion power battery diaphragms disclosed by the prior art, aluminium oxide is not used, so that aluminium oxide can not carry out chemical reaction with lithium iron phosphate in positive plates of lithium batteries, and trilithium aluminate (Li3AlO3) can not be generated; therefore the problem of puncture of the diaphragm does not exist in a battery using process, so that the safety of a lithium battery can be improved, and the service life of the lithium battery can be prolonged.
Description
technical field
The present invention relates to a kind of abrasive for the lithium-ion-power cell barrier film, coating sizing-agent and preparation method thereof.
Background technology
Power cell is the power supply that instrument provides power resources, refers to provide for electromobile, electric train, electric bicycle, golf cart the store battery of power more.With power cell, as the automobile of the energy new-energy automobile that is otherwise known as, new-energy automobile and characteristic environmental protection energy-conservation because of it is expected, but its industrialization faces greatest problem, is high selling price.From external hybrid vehicle, the price difference between hybrid vehicle of the same type and fuel combustion type automobile reaches ten thousand yuans of 8-10, and the price difference of domestic pure electric vehicle type and fuel vehicle of the same type is especially up to more than 20 ten thousand.Can progressively fill and lead up although the operation and maintenance in new-energy automobile later stage is with low cost the price difference of once purchasing, the great number acquisition price becomes the significant obstacle that hinders the new-energy automobile industrialization undoubtedly.
The height of new-energy automobile price comes from dynamic lithium battery, and new-energy automobile mainly partly is comprised of battery powered system, electric system and electrical control system and assembling etc.Wherein motor, automatically controlled and assembling and orthodox car are basic identical, and the reason of price difference is battery powered system.From the cost structure of new-energy automobile, battery powered system has occupied the 30-45% of new-energy automobile cost, and dynamic lithium battery occupies the cost structure of the about 75-85% of battery powered system.
Business-like dynamic lithium battery mainly comprises ferric phosphate lithium cell, lithium manganate battery and ternary material battery etc. in the market, and China market be take iron lithium phosphate as main, the hybrid battery system of the large more options lithium manganate of Japan and Korea S and ternary material.At present domestic ferric phosphate lithium cell price is about 3-4 unit/Wh, and lithium manganate and ternary material battery are about 4-5 unit/Wh.Consider the cell container of dissimilar new-energy automobile, the cell container of plug-in hybrid-power automobile is 10-16KWh, the cell container 24-60KWh of pure electric automobile, the cell container of pure electric bus is generally 200-400Kwh, corresponding battery price is in ten thousand yuan of 3-5, ten thousand yuan of 7-18 and ten thousand yuan of levels of 60-120, and so high battery price is the major cause that new-energy automobile holds at high price.
Reduce the battery cost, always be solution party important in industry to.Positive electrode material, negative material, battery diaphragm, electrolytic solution is most important four starting material of lithium cell, wherein, positive electrode material, negative material and electrolytic solution, realized production domesticization fully, its Costco Wholesale is effectively controlled, but, lithium battery diaphragm is because investment risk is large, technical threshold is high, fail to realize domestic scale operation always, become the bottleneck of restriction China lithium cell industry development, particularly to security, the power lithium-ion battery field that coherence request is higher, the obstacle that China makes the country prosperous and is difficult to go beyond from lithium cell big producing country to lithium cell production especially.
Battery diaphragm is the highest a kind of high added value material of technology barriers in the lithium electric material, has accounted for the 30-50% of lithium cell cost.How in the situation that guarantee the lithium cell security, reduce battery diaphragm cost, be current power cell industry problem in the urgent need to address.At present, battery diaphragm is to coat coating sizing-agent at the one or both sides of the polymeric membrane of Porous to form, the cost determination of coating sizing-agent the cost of battery diaphragm.
In order to address this problem, Chinese patent literature CN102751483A discloses a kind of lithium-ion-power cell barrier film and preparation method thereof, used the coating sizing-agent of 40 50% precipitator method barium sulfate (w/w) and 1 5% aluminium sesquioxide (w/w) in battery isolating film in the document, because the cost of precipitator method barium sulfate is lower, so, can reduce widely the cost of battery isolating film, thereby reduce the cost of dynamic lithium battery.But, this battery isolating film, although have certain price advantage, also there is certain hidden danger in it aspect security.This be because, the coating sizing-agent in the document contains aluminium sesquioxide, and aluminium sesquioxide is after making battery, can with positive plate of lithium battery in iron lithium phosphate generation chemical reaction, generate aluminic acid three lithium (Li
3alO
3), and aluminic acid three lithiums are spinel structures, in the process of using at battery, easily puncture barrier film, cause the positive and negative electrode short circuit of lithium cell, gently make lithium cell reduction of service life, heavy cause the lithium cell heating and the generation battery explosion.
At present, China is due to a large amount of productions of solar power silicon plate, make the silicon carbide industry supporting with it also advance by leaps and bounds, sale weakness due to solar power silicon plate on world market, also affected silicon carbide in our production capacity surplus, prices is also sold and is had some setbacks, and is badly in need of finding other Application Areas for silicon carbide.
summary of the invention
In order to overcome the problems referred to above, the present invention provides a kind of not only with low cost to society, and the good abrasive that can be used for the lithium-ion-power cell barrier film of safety performance.
Second purpose of the present invention is to provide a kind of preparation method of described abrasive.
The 3rd purpose of the present invention is to provide the coating sizing-agent that the described abrasive of a kind of use is made.
The 4th purpose of the present invention is to provide a kind of preparation method of coating sizing-agent.
With respect to first goal of the invention, technical scheme of the present invention is: a kind of abrasive of lithium-ion-power cell barrier film is provided, comprises the following component of weight percent,
Silicon carbide (SiC) 25-55%
N, N-Methyl pyrrolidone 1-3%
Vinyl pyrrolidone 1-3%
Carbonic acid divinyl ester 1-3%
Organic fluorine dispersion agent 0.01-1%
The deionized water surplus.
As improvement of the present invention, described organic fluorine dispersion agent is the FSWET-1010 of Du Pont organic fluorine dispersion agent.
This is the preparation method that a kind of abrasive of lithium-ion-power cell barrier film also is provided, component and ratio in above-mentioned abrasive, various components are inserted in dispersion machine, in dispersion machine, disperse to stir at least 15 minutes, then, transfer in shredder, by the zirconium dioxide grinding bead, grind 20-50 hour, make ground slurry, standby.
The present invention also provides a kind of coating sizing-agent of lithium-ion-power cell barrier film, comprises the following component of weight percent,
Chemical industry binder 10-25%
Thickening material 1-3%
Ground slurry 25-55%
Defoamer 0.1-0.3%
Wetting agent 0.1-0.3%
Dispersion agent 0.1-0.3%
Flow agent 0.1-0.3%.
As improvement of the present invention, described chemical industry binder is SBR carboxylic styrene butadiene latex, carboxylic styrene-butadiene rubber dispersion liquid, polyurethane aqueous dispersion liquid, vinylformic acid-primary amine copolymer emulsion, vinylformic acid-primary amine copolymerization dispersion liquid, vinylidene solvent-borne type dispersion liquid or vinylidene aqueous liquid dispersion.
As improvement of the present invention, described thickening material is Xylo-Mucine or associative thickener.
The present invention also provides a kind of preparation method of coating sizing-agent, in component and the ratio of above-mentioned coating sizing-agent, inserts in container and is uniformly mixed and gets final product.
The present invention has adopted the cheap silicon carbide of China (production capacity surplus occurred in making solar power silicon plate process, for China's silicon carbide has found a new outlet) as the main raw material of ground slurry or coating sizing-agent, can reduce widely the cost of ground slurry and coating sizing-agent; For the disclosed lithium-ion-power cell barrier film of Chinese patent literature CN102751483A, owing to there not being aluminium sesquioxide, thereby, after making battery, just do not have aluminic acid three lithium (Li
3alO
3) generate, therefore, in the process of using at battery, do not have the problem that punctures barrier film, can improve like this security of lithium cell and the work-ing life of prolongation lithium cell; Again, silicon carbide has good heat conductivility, can accelerate the radiating rate of lithium cell, can improve equally the work-ing life of lithium cell, thereby further reduces the use cost of lithium cell.
Embodiment
One, ground slurry
The ground slurry of following each embodiment all adopts following method preparation, component and ratio in the abrasive of following each embodiment, various components are inserted in dispersion machine, in dispersion machine, disperse to stir at least 15 minutes, then, transfer in shredder, by the zirconium dioxide grinding bead, grind 20-50 hour, make ground slurry, standby.
Embodiment 1
Silicon carbide 25%
N, N-Methyl pyrrolidone 1%
Vinyl pyrrolidone 1%
Carbonic acid divinyl ester 1%
Organic fluorine dispersion agent 0.01%
The deionized water surplus.
Embodiment 2
Silicon carbide 30%
N, N-Methyl pyrrolidone 2%
Vinyl pyrrolidone 2%
Carbonic acid divinyl ester 2%
Organic fluorine dispersion agent 0.1%
The deionized water surplus.
Embodiment 3
Silicon carbide 35%
N, N-Methyl pyrrolidone 3%
Vinyl pyrrolidone 3%
Carbonic acid divinyl ester 3%
Organic fluorine dispersion agent 0.3%
The deionized water surplus.
Embodiment 4
Silicon carbide 40%
N, N-Methyl pyrrolidone 3%
Vinyl pyrrolidone 3%
Carbonic acid divinyl ester 3%
Organic fluorine dispersion agent 0.5%
The deionized water surplus.
Embodiment 5
Silicon carbide 45%
N, N-Methyl pyrrolidone 3%
Vinyl pyrrolidone 3%
Carbonic acid divinyl ester 3%
Organic fluorine dispersion agent 0.7%
The deionized water surplus.
Embodiment 6
Silicon carbide 50%
N, N-Methyl pyrrolidone 3%
Vinyl pyrrolidone 3%
Carbonic acid divinyl ester 3%
Organic fluorine dispersion agent 1%
The deionized water surplus.
Embodiment 7
Silicon carbide 55%
N, N-Methyl pyrrolidone 3%
Vinyl pyrrolidone 3%
Carbonic acid divinyl ester 3%
Organic fluorine dispersion agent 1%
The deionized water surplus.
Two, coating sizing-agent
The preparation method of following each coating sizing-agent, all can, in component and the ratio of the coating sizing-agent of following each embodiment, insert in container and be uniformly mixed and get final product.
Chemical industry binder in following each embodiment can be selected any one in SBR carboxylic styrene butadiene latex, carboxylic styrene-butadiene rubber dispersion liquid, polyurethane aqueous dispersion liquid, vinylformic acid-primary amine copolymer emulsion, vinylformic acid-primary amine copolymerization dispersion liquid, vinylidene solvent-borne type dispersion liquid and vinylidene aqueous liquid dispersion, and the phase trans-substitution is used.
Thickening material in following each embodiment can be selected any one in Xylo-Mucine and associative thickener, and the phase trans-substitution is used.
Ground slurry in following each embodiment can be selected any one embodiment in above-mentioned enforcement 1 to embodiment 7.
Embodiment 8
SBR carboxylic styrene butadiene latex 10%
Xylo-Mucine 1%
Ground slurry (adopting embodiment 1) 25%
Defoamer 0.1%
Wetting agent 0.1%
Dispersion agent 0.1%
Flow agent 0.1%.
Embodiment 9
Carboxylic styrene-butadiene rubber dispersion liquid 15%
Associative thickener 2%
Ground slurry (adopting embodiment 2) 30%
Defoamer 0.2%
Wetting agent 0.2%
Dispersion agent 0.2%
Flow agent 0.2%.
Embodiment 10
Polyurethane aqueous dispersion liquid 20%
Xylo-Mucine 3%
Ground slurry (adopting embodiment 3) 35%
Defoamer 0.3%
Wetting agent 0.3%
Dispersion agent 0.3%
Flow agent 0.3%.
Embodiment 11
Vinylformic acid-primary amine copolymer emulsion 25%
Associative thickener 3%
Ground slurry (adopting embodiment 4) 40%
Defoamer 0.3%
Wetting agent 0.3%
Dispersion agent 0.3%
Flow agent 0.3%.
Embodiment 12
Vinylformic acid-primary amine copolymerization dispersion liquid 25%
Xylo-Mucine 3%
Ground slurry (adopting embodiment 5) 45%
Defoamer 0.3%
Wetting agent 0.3%
Dispersion agent 0.3%
Flow agent 0.3%.
Embodiment 13
Vinylidene solvent-borne type dispersion liquid 25%
Associative thickener 3%
Ground slurry (adopting embodiment 6) 50%
Defoamer 0.3%
Wetting agent 0.3%
Dispersion agent 0.3%
Flow agent 0.3%.
Embodiment 14
Vinylidene aqueous liquid dispersion 25%
Xylo-Mucine 3%
Ground slurry (adopting embodiment 7) 55%
Defoamer 0.3%
Wetting agent 0.3%
Dispersion agent 0.3%
Flow agent 0.3%.
By embodiment 8 to embodiment 14 described coating sizing-agents, be coated on respectively on micropore basal membrane, coating thickness, in 10 μ m ± 0.5 μ m scope, adopts following examination criteria: EN 29073-T1; With main a few money battery isolating films of the similar thickness of external import, compare, its result is as follows:
As can be seen from the above table, not only all properties index has all reached the standard of external import, and increases on air penetrability, closed pore temperature and three Performance figures of breaking temperature.Like this, in the work-ing life that can improve the lithium cell of working it out with the present invention, reach the purpose further reduced costs.
Claims (7)
1. the abrasive of a lithium-ion-power cell barrier film is characterized in that: comprise the following component of weight percent,
Silicon carbide 25-55%
N, N-Methyl pyrrolidone 1-3%
Vinyl pyrrolidone 1-3%
Carbonic acid divinyl ester 1-3%
Organic fluorine dispersion agent 0.01-1%
The deionized water surplus.
2. the abrasive of a kind of lithium-ion-power cell barrier film according to claim 1, it is characterized in that: described organic fluorine dispersion agent is the FSWET-1010 of Du Pont organic fluorine dispersion agent.
3. the preparation method of the abrasive of a lithium-ion-power cell barrier film, it is characterized in that: in component and the ratio of abrasive claimed in claim 1, various components are inserted in dispersion machine, in dispersion machine, disperse to stir at least 15 minutes, then, transfer in shredder, by the zirconium dioxide grinding bead, grind 20-50 hour, make ground slurry, standby.
4. the coating sizing-agent of a lithium-ion-power cell barrier film is characterized in that: comprise the following component of weight percent,
Chemical industry binder 10-25%
Thickening material 1-3%
Ground slurry 25-55%
Defoamer 0.1-0.3%
Wetting agent 0.1-0.3%
Dispersion agent 0.1-0.3%
Flow agent 0.1-0.3%.
5. according to the coating sizing-agent of the described a kind of lithium-ion-power cell barrier film of claim 4, it is characterized in that: described chemical industry binder is SBR carboxylic styrene butadiene latex, carboxylic styrene-butadiene rubber dispersion liquid, polyurethane aqueous dispersion liquid, vinylformic acid-primary amine copolymer emulsion, vinylformic acid-primary amine copolymerization dispersion liquid, vinylidene solvent-borne type dispersion liquid or vinylidene aqueous liquid dispersion.
6. according to the coating sizing-agent of the described a kind of lithium-ion-power cell barrier film of claim 4 or 5, it is characterized in that: described thickening material is Xylo-Mucine or associative thickener.
7. the preparation method of a coating sizing-agent, is characterized in that: in component and the ratio of coating sizing-agent claimed in claim 4, insert in container and be uniformly mixed and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104394652A CN103468208A (en) | 2013-09-25 | 2013-09-25 | Abrasive and coating slurry of lithium-ion power battery diaphragm and preparation methods thereof |
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|---|---|---|---|
| CN2013104394652A CN103468208A (en) | 2013-09-25 | 2013-09-25 | Abrasive and coating slurry of lithium-ion power battery diaphragm and preparation methods thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638203A (en) * | 2018-11-26 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of lithium ion battery separator |
| CN112201880A (en) * | 2020-09-28 | 2021-01-08 | 消之源科技技术有限公司 | Preparation method of automatic intelligent cooling partition plate for new energy lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109638203A (en) * | 2018-11-26 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of lithium ion battery separator |
| CN112201880A (en) * | 2020-09-28 | 2021-01-08 | 消之源科技技术有限公司 | Preparation method of automatic intelligent cooling partition plate for new energy lithium battery |
| CN112201880B (en) * | 2020-09-28 | 2022-11-11 | 消之源科技技术有限公司 | Preparation method of cooling partition plate for lithium battery |
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Application publication date: 20131225 |