CN106410209A - Silver-gray electroconductive slurry for lithium battery current collector and its preparation method and use - Google Patents
Silver-gray electroconductive slurry for lithium battery current collector and its preparation method and use Download PDFInfo
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- CN106410209A CN106410209A CN201610907304.5A CN201610907304A CN106410209A CN 106410209 A CN106410209 A CN 106410209A CN 201610907304 A CN201610907304 A CN 201610907304A CN 106410209 A CN106410209 A CN 106410209A
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- gray
- silver
- electrocondution slurry
- slurry
- silver gray
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- 239000002002 slurry Substances 0.000 title claims abstract description 80
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052709 silver Inorganic materials 0.000 claims abstract description 56
- 239000004332 silver Substances 0.000 claims abstract description 56
- 238000000576 coating method Methods 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 239000013530 defoamer Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011889 copper foil Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000005030 aluminium foil Substances 0.000 claims 1
- 239000011149 active material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 229910021383 artificial graphite Inorganic materials 0.000 abstract 1
- 229910021382 natural graphite Inorganic materials 0.000 abstract 1
- 238000012512 characterization method Methods 0.000 description 10
- 239000013543 active substance Substances 0.000 description 7
- 230000002950 deficient Effects 0.000 description 7
- 241000222065 Lycoperdon Species 0.000 description 5
- 241000768494 Polymorphum Species 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000003643 water by type Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses silver-gray electroconductive slurry for a lithium battery current collector. The silver-gray electroconductive slurry comprises, by weight, 5 to 30 parts of an electroconductive carbon source, 3 to 25 parts of an electroconductive adhesive, 0.5 to 10 parts of a defoamer and 35 to 91.5 parts of a solvent. The electroconductive carbon source comprises one or more of artificial graphite and natural graphite and is in a color of light black, silver gray or offwhite. The invention also discloses a preparation method of the silver-gray electroconductive slurry for a lithium battery current collector and a use of the silver-gray electroconductive slurry as an aluminum/copper foil electroconductive coating of a lithium ion battery. The silver-gray electroconductive slurry reduces the resistance between the active material and the current collector, improves the adhesion between the active material and the current collector, greatly reduces the use amount of a binder, prevents corrosion and oxidation of the current collector, improves battery conductivity, stability, safety and reliability, improves the battery assembling, reduces the cost of a battery manufacturer and improves the overall performances of the battery. The preparation method has the characteristics of simple preparation processes and low production cost.
Description
【Technical field】
The present invention relates to electrocondution slurry and its preparation and use, more particularly to a kind of caking property is strong, electric conductivity is excellent,
And the silver gray electrocondution slurry for lithium battery collector of low production cost and its production and use.
【Background technology】
Fast development with lithium ion battery industry and the continuous expansion in market, to the performance requirement of lithium ion battery not
Disconnected lifting, wherein, high power discharge and recharge, high safety performance, long-life electrokinetic cell are in lithium ion battery industry predominantly
Position.Collector as the indispensable part of lithium ion battery, its effect be the electric current that cell active materials are produced collect with
Just form larger current versus output, this requires to be fully contacted between collector and active substance, and internal resistance should be as far as possible
Little.
In existing lithium battery processing technology, active substance is directly coated at collection liquid surface, passes through binding agent after being dried
Realize active substance and be fixed on collection liquid surface.However, there is following both sides defect in such structure design：1) rigidity
Contact area between metal collector and active material particle is limited, and interface resistance is larger, causes the rising of the internal resistance of cell, for
There is negative effect in the performance under the conditions of battery performance particularly high current charge-discharge；2) adhesion strength of binding agent is limited,
It is easy to there is expanding to disengage between active substance and collector in lasting charge and discharge process, lead to the internal resistance of cell further
Increase so that the cycle life of battery and security performance are affected.In order to overcome the problems referred to above, research finds by afflux
Body carries out being surface-treated, and can be effectively improved collector and lithium ion battery active substance adhesive property, to reduce making of binding agent
With thus improving the electric conductivity of lithium ion battery.Therefore, how a kind of good conductivity is provided and bond effect is good, make battery
Capacity is preferably played, and the finish materials of preparation process is simple then become a kind of objective demand.
【Content of the invention】
Present invention seek to address that the problems referred to above, and a kind of can raising between lithium battery active materials and collector is provided
Adhesion property, improves collector electric conductivity, the resistance of reduction battery, prevents collector corrosion and aoxidize, to improve the steady of battery
Qualitative, the silver gray electrocondution slurry for lithium battery collector of safety and reliability.
For realizing the purpose of the present invention, the invention provides a kind of silver gray electrocondution slurry for lithium battery collector,
This electrocondution slurry comprises following component by weight percentage：
Described conduction carbon source is behaved and is made one of graphite, native graphite or a combination thereof, and its color is light/dark balance, silver gray
Or canescence.
Preferably, the silver gray electrocondution slurry for lithium battery collector of the present invention comprise by weight percentage as
Lower component：
Described conduction carbon source is behaved and is made one of graphite, native graphite or a combination thereof, and its color is light/dark balance, silver gray
Or canescence.
The particle diameter of described conduction carbon source is 15 nanometers～50 microns.
Described conducting resinl is aqueouss LA-133, one kind of Polyvinylpyrrolidone, carboxymethyl cellulose or butadiene-styrene rubber.
Described defoamer is one of ethanol, methanol, Polyethylene Glycol, calcium oxide or several combinations.
Described solvent is deionized water.
Present invention also offers a kind of preparation method of the silver gray electrocondution slurry for lithium battery collector, the method bag
Include following steps：
A, solvent and conducting resinl are pressed 35～91.5:When 3～25 weight is than adding in blender stirring 0.5～3 little；
B, add the conductive carbon source that weight percent content is 5～30 to stir into blender 1～5 hour, add again
Measure the defoamer that degree is 0.5～10 to stir 0.5～2 hour, obtain silver-gray just dispersed electro-conductive slurry；
C, the first dispersed electro-conductive slurry in step b is added in dispersal device and disperses 3-10 time, obtain silver gray conductive paste
Material.
In step c, described dispersal device is blender, skin grinder or cell pulverization instrument.
Present invention also offers a kind of silver gray electrocondution slurry for lithium battery collector is as lithium ion battery aluminium/copper
The application of paper tinsel conductive coating.
The contribution of the present invention is, it efficiently solves and is currently used for the electrocondution slurry adhesion strength of lithium battery collector and has
Limit, and electrocondution slurry processing technique is complicated, the high problem of production cost.The present invention passes through with conductive carbon source, conducting resinl, defoamer
And the silver gray electrocondution slurry that solvent is prepared for raw material, it is applied on collector and obtains collector conductive coating, it can not only carry
For static conductive performance, collect the micro-current of lithium ion battery plus-negative plate active substance, such that it is able to active matter is greatly lowered
Resistance between matter and collector, but also adhesive force between the two can be improved, the consumption of binding agent is greatly reduced, to collection
Fluid plays anticorrosion and Oxidation, improves electric conductivity, stability, safety and the reliability of battery, improves battery combo,
Reduce cell production companies cost, and then so that the overall performance generation of battery is obviously improved.The present invention also has preparation technology
Simply, the low feature of low production cost, long service life, product fraction defective.
【Brief description】
Fig. 1 is the schematic diagram of the electrocondution slurry of the present invention.
Fig. 2 is that the electrocondution slurry of the present invention is coated on the schematic diagram of aluminum/Copper Foil.
Fig. 3 is the electrocondution slurry SEM figure of the present invention.
Fig. 4 is the aluminum/Copper Foil conductive coating section SEM figure of the present invention.
【Specific embodiment】
The following example is being explained further and supplementing to the present invention, and the present invention is not limited in any way.
Embodiment 1
It is separately added into 60 grams of deionized waters and 15 grams of Polyvinylpyrrolidone stir 2 hours in blender, be subsequently adding
20 grams of mean diameters are that 5 microns of Lycoperdon polymorphum Vitt conduction Delanium stirs 3 hours, are eventually adding 5 grams of ethanol and continue stirring 1 hour,
Obtaining color is silver-gray just dispersed electro-conductive slurry, first dispersed electro-conductive slurry is disperseed 6 times with skin grinder, obtains silver gray and lead
Plasma-based material, as shown in Figure 1.
The electrocondution slurry obtaining is carried out SEM sign, from SEM figure, characterization result is as shown in figure 3, can be seen that silver gray is conductive
Slurry is uniformly dispersed.In the collector that the electrocondution slurry obtaining is coated lithium battery in coating machine, obtain silver gray afflux
Body coating, as shown in Figure 2.The coating obtaining is carried out SEM sign, characterization result as shown in figure 4, can be seen that silver grey from SEM figure
Color electrocondution slurry contacts closely knit with collector.Silver gray is applied the coating in lithium ion battery, test result shows, the present invention
Silver gray electrocondution slurry can reduce resistance between cell active materials and collector, improve stability, the safety of battery
And reliability, its electric conductivity is substantially better than black conductive slurry, and thickness of thin, adhering to performance between electrode and collector
With the obvious advantage, battery producer is easy to identify in application, it is possible to decrease the fraction defective of product, improves battery with two side terminals.
Embodiment 2
It is separately added into 66 grams of deionized waters and 10 grams of LA-133 stir 2 hours in blender, be subsequently adding 20 grams averagely
Particle diameter is that 20 microns of Lycoperdon polymorphum Vitt conduction Delanium stirs 3 hours, is eventually adding 4 grams of methanol and continues stirring 1 hour, obtains color
For silver-gray just dispersed electro-conductive slurry, first dispersed electro-conductive slurry is disperseed 6 times with cell pulverization instrument, obtains silver gray conductive paste
Material.
The electrocondution slurry obtaining is carried out SEM sign, can be seen that silver gray electrocondution slurry is uniformly dispersed from characterization result.Will
In the collector that the electrocondution slurry obtaining coats lithium battery in coating machine, obtain silver gray current collector coatings.By obtain
Coating carries out SEM sign, and it is closely knit that characterization result shows that silver gray electrocondution slurry is contacted with collector.Silver gray is applied the coating to
In lithium ion battery, test result shows, the silver gray electrocondution slurry of the present invention can reduce cell active materials and collector it
Between resistance, improve the stability of battery, safety and reliability, its electric conductivity is substantially better than black conductive slurry, and thick
Degree is thin, and performance advantage is obvious for adhering between electrode and collector, and battery producer is easy to identify in application, it is possible to decrease product
Fraction defective, improves battery with two side terminals.
Embodiment 3
It is separately added into 35 grams of deionized waters and 25 grams of carboxymethyl celluloses stir 3 hours in blender, be subsequently adding 30
Gram mean diameter is that 50 microns of canescence conduction native graphite stirs 5 hours, is eventually adding 10 grams of Polyethylene Glycol and continues stirrings 2
Hour, obtaining color is silver-gray just dispersed electro-conductive slurry, first dispersed electro-conductive slurry is disperseed 10 times with sand mill, obtains silver
Lycoperdon polymorphum Vitt electrocondution slurry.
The electrocondution slurry obtaining is carried out SEM sign, can be seen that silver gray electrocondution slurry is uniformly dispersed from characterization result.Will
In the collector that the electrocondution slurry obtaining coats lithium battery in coating machine, obtain silver gray current collector coatings.By obtain
Coating carries out SEM sign, and it is closely knit that characterization result shows that silver gray electrocondution slurry is contacted with collector.Silver gray is applied the coating to
In lithium ion battery, test result shows, the silver gray electrocondution slurry of the present invention can reduce cell active materials and collector it
Between resistance, improve the stability of battery, safety and reliability, its electric conductivity is substantially better than black conductive slurry, and thick
Degree is thin, and performance advantage is obvious for adhering between electrode and collector, and battery producer is easy to identify in application, it is possible to decrease product
Fraction defective, improves battery with two side terminals.
Embodiment 4
It is separately added into 91.5 grams of deionized waters and 3 grams of butadiene-styrene rubber stir 0.5 hour in blender, be subsequently adding 5 grams
Mean diameter is that 200 nanometers of silver gray conduction Delanium stirs 1 hour, is eventually adding 0.5 gram of calcium oxide and continues stirring 0.5
Hour, obtaining color is silver-gray just dispersed electro-conductive slurry, first dispersed electro-conductive slurry is disperseed 3 times with sand mill, obtains silver
Lycoperdon polymorphum Vitt electrocondution slurry.
The electrocondution slurry obtaining is carried out SEM sign, can be seen that silver gray electrocondution slurry is uniformly dispersed from characterization result.Will
In the collector that the electrocondution slurry obtaining coats lithium battery in coating machine, obtain silver gray current collector coatings.By obtain
Coating carries out SEM sign, and it is closely knit that characterization result shows that silver gray electrocondution slurry is contacted with collector.Silver gray is applied the coating to
In lithium ion battery, test result shows, the silver gray electrocondution slurry of the present invention can reduce cell active materials and collector it
Between resistance, improve the stability of battery, safety and reliability, its electric conductivity is substantially better than black conductive slurry, and thick
Degree is thin, and performance advantage is obvious for adhering between electrode and collector, and battery producer is easy to identify in application, it is possible to decrease product
Fraction defective, improves battery with two side terminals.
Embodiment 5
It is separately added into 55 grams of deionized waters and 15 grams of LA-133 stir 2 hours in blender, be subsequently adding 25 grams averagely
Particle diameter is that 15 nanometers of Lycoperdon polymorphum Vitt conduction Delanium stirs 3 hours, is eventually adding 5 grams of ethanol and continues stirring 1 hour, obtains color
For silver-gray just dispersed electro-conductive slurry, first dispersed electro-conductive slurry is disperseed 6 times with sand mill, obtains silver gray electrocondution slurry.
The electrocondution slurry obtaining is carried out SEM sign, can be seen that silver gray electrocondution slurry is uniformly dispersed from characterization result.Will
In the collector that the electrocondution slurry obtaining coats lithium battery in coating machine, obtain silver gray current collector coatings.By obtain
Coating carries out SEM sign, and it is closely knit that characterization result shows that silver gray electrocondution slurry is contacted with collector.Silver gray is applied the coating to
In lithium ion battery, test result shows, the silver gray electrocondution slurry of the present invention can reduce cell active materials and collector it
Between resistance, improve the stability of battery, safety and reliability, its electric conductivity is substantially better than black conductive slurry, and thick
Degree is thin, and performance advantage is obvious for adhering between electrode and collector, and battery producer is easy to identify in application, it is possible to decrease product
Fraction defective, improves battery with two side terminals.
Take this, the present invention passes through the silver gray conductive paste prepared with conductive carbon source, conducting resinl, defoamer and solvent for raw material
Material, is applied on collector and obtains collector conductive coating, and it is not only provided that static conductive performance, is just collecting lithium ion battery
The micro-current of negative electrode active material, such that it is able to the resistance being greatly lowered between active substance and collector, but also can carry
High adhesive force between the two, is greatly reduced the consumption of binding agent, and collector is played with anticorrosion and Oxidation, improves electricity
The electric conductivity in pond, stability, safety and reliability, improve battery combo, reduce cell production companies cost, and then make battery
Overall performance produce be obviously improved.The present invention also has preparation process is simple, low production cost, long service life, product
The low feature of fraction defective.
Although being disclosed to the present invention by above example, protection scope of the present invention is not limited thereto,
Under conditions of without departing from present inventive concept, the right of the present invention all will be fallen into the deformation that each component is done above, replacement etc.
In claimed range.
Claims (9)
1. a kind of silver gray electrocondution slurry for lithium battery collector is it is characterised in that this electrocondution slurry comprises with weight hundred
Divide the following component than meter：
Described conduction carbon source is behaved and is made one of graphite, native graphite or a combination thereof, and its color is light/dark balance, silver gray or ash
White.
2. it is used for as claimed in claim 1 the silver gray electrocondution slurry of lithium battery collector it is characterised in that this electrocondution slurry
Comprise following component by weight percentage：
Described conduction carbon source is behaved and is made one of graphite, native graphite or a combination thereof, and its color is light/dark balance, silver gray or ash
White.
3. it is used for as claimed in claim 1 the silver gray electrocondution slurry of lithium battery collector it is characterised in that described conductive carbon
The particle diameter in source is 15 nanometers～50 microns.
4. it is used for as claimed in claim 1 the silver gray electrocondution slurry of lithium battery collector it is characterised in that described conducting resinl
For aqueouss LA-133, one kind of Polyvinylpyrrolidone, carboxymethyl cellulose or butadiene-styrene rubber.
5. it is used for as claimed in claim 1 the silver gray electrocondution slurry of lithium battery collector it is characterised in that described defoamer
For one of ethanol, methanol, Polyethylene Glycol, calcium oxide or several combinations.
6. it is used for the silver gray electrocondution slurry of lithium battery collector as claimed in claim 1 it is characterised in that described solvent is
Deionized water.
7. a kind of preparation method being used for the silver gray electrocondution slurry of lithium battery collector as claimed in claim 1, its feature
It is, the method comprises the steps：
A, solvent and conducting resinl are pressed 35～91.5:When 3～25 weight is than adding in blender stirring 0.5～3 little；
B, add the conductive carbon source stirring that weight percent content is 5～30 1～5 hour into blender, add weight hundred
When point less than the defoamer stirring 0.5～2 that content is 0.5～10, obtain silver-gray just dispersed electro-conductive slurry；
C, the first dispersed electro-conductive slurry in step b is added in dispersal device and disperses 3-10 time, obtain silver gray electrocondution slurry.
8. be used for as claimed in claim 7 the preparation method of the silver gray electrocondution slurry of lithium battery collector it is characterised in that
In step c, described dispersal device is blender, skin grinder or cell pulverization instrument.
9. it is used for the silver gray electrocondution slurry of lithium battery collector as claimed in claim 1 as lithium ion battery aluminium/Copper Foil
The application of conductive coating.
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| CN201610907304.5A CN106410209A (en) | 2016-10-18 | 2016-10-18 | Silver-gray electroconductive slurry for lithium battery current collector and its preparation method and use |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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|---|---|---|---|---|
| CN107248577A (en) * | 2017-06-19 | 2017-10-13 | 佛山市大为科技有限公司 | A kind of high safety lithium battery collection liquid surface coating waterborne conductive slurry and its preparation method and application |
| CN107248577B (en) * | 2017-06-19 | 2019-05-10 | 佛山市大为科技有限公司 | A kind of high safety lithium battery collection liquid surface coating waterborne conductive slurry and its preparation method and application |
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