CN106299524A - Carbon-coated current collector easy for separating powder from foil and application and recovery method - Google Patents
Carbon-coated current collector easy for separating powder from foil and application and recovery method Download PDFInfo
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- CN106299524A CN106299524A CN201610719496.7A CN201610719496A CN106299524A CN 106299524 A CN106299524 A CN 106299524A CN 201610719496 A CN201610719496 A CN 201610719496A CN 106299524 A CN106299524 A CN 106299524A
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- foil
- carbon
- water
- soluble
- collector
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 69
- 239000011888 foil Substances 0.000 title claims abstract description 62
- 239000000843 powder Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011084 recovery Methods 0.000 title claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 239000003575 carbonaceous material Substances 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 10
- 229910001416 lithium ion Inorganic materials 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000013543 active substance Substances 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- -1 alkyl phenol Chemical compound 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- LLYXJBROWQDVMI-UHFFFAOYSA-N 2-chloro-4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1Cl LLYXJBROWQDVMI-UHFFFAOYSA-N 0.000 claims description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229920000180 alkyd Polymers 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920001289 polyvinyl ether Polymers 0.000 claims description 2
- 238000009288 screen filtration Methods 0.000 claims description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical class [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 2
- 229920003169 water-soluble polymer Polymers 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 23
- 239000003792 electrolyte Substances 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000010405 anode material Substances 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 239000005030 aluminium foil Substances 0.000 description 22
- 239000011230 binding agent Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 7
- 230000004044 response Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 239000011149 active material Substances 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004137 mechanical activation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000013589 supplement Substances 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/64—Carriers or collectors
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a carbon-coated current collector easy for separating powder from foil, which comprises a current collector foil, wherein one side or two sides of the current collector foil are provided with water-soluble carbon coatings, and the water-soluble carbon coatings are composed of the following raw materials in percentage by weight: 20-50% of water-soluble resin, 40-70% of carbon material and 0-20% of dispersing agent, wherein the thickness of the current collector foil is 5-25 μm, and the thickness of the water-soluble carbon coating is 1-4 μm. The water-soluble carbon coating layer is easy to dissolve by water, and has electrolyte resistance and NMP resistance. The invention also discloses a recovery method of the carbon coating current collector easy for separating the powder from the foil, which enables the water-soluble carbon coating layer between the anode material and the aluminum foil to be fully dissolved through the steps of soaking, stirring, filtering and the like, thereby realizing the effective separation of the anode material and the aluminum foil current collector.
Description
Technical field
The invention belongs to lithium ion battery material and reclaim field, a kind of be prone to the carbon coating that powder separates with foil
Collector and application.
Background technology
The problem of environmental pollution is day by day serious, and the environmental protection consciousness of people becomes strong gradually.Traditional energy produces huge
Carbon emission, more and more obvious on the impact of global climate, especially cause with the tradition petrochemical industry automobile as fuel to environment
Heavier pressure.Along with new forms of energy proportion in energy resource structure incrementally increases, following new-energy automobile also will progressively substitute biography
The automobile of system.New-energy automobile supporting dynamics is gradually increased by China, the battery used by current new-energy automobile be mainly lithium from
Sub-battery.Lithium ion battery has the advantages such as high-energy-density, high voltage, life-span length and memory-less effect, becomes electric automobile
First-selection.
Along with lithium ion battery large-scale use in electric automobile, the recovery of old and useless battery will be huge asking
Topic.The major part of battery is battery core, electrolyte and battery case, and battery case is disassembled by cutting and is easy to reclaim.Electrolyte is
Volatile liquid, separates the most relatively easy.But the both positive and negative polarity active material in battery core is not readily separated with aluminium foil, Copper Foil etc..
Positive active material is tightly combined with aluminium foil by PVDF；Negative electrode active material is adhered to firmly at the bottom of cuprio by SBR glue.At present
In commercial Application, it is achieved the Main Means that active substance separates with base material is: high-temperature heating destroys the adhesion of binding agent, then warp
Cross mechanical activation comminution, realize metal base by blower system and separate with active substance.This method operation sequence is many, heating and
Pulverize link and consume substantial amounts of energy, and cause air, dust etc. and pollute.The separator purity of last gained is limited.
Realize that active substance separates with foil it is crucial that eliminate the adhesion of PVDF, SBR etc. and foil, this adhesion
The main cause produced is that the polar functional group in macromolecule defines the interaction such as hydrogen bond, Van der Waals force with substrate surface.
Use some organic solvents such as NMP, dimethylbenzene etc. can effectively dissolve these binding agents, destroy bonding action, it is achieved separate,
But these solvents are harmful, pollute environment and cost is high.
Summary of the invention
It is an object of the invention to overcome prior art, it is provided that a kind of be prone to the carbon coated collector that powder separates with foil
And apply and recovery method, the method has advantage efficient, pollution-free, that operation is simple, with low cost and energy consumption is little.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of it is prone to the carbon coated collector that powder separates with foil, including collector foil, it is characterised in that described collector
The single or double of foil has containing water-soluble carbon coating, and described water-soluble carbon coating is by the raw material of following weight percent content
Composition: water-soluble resin 20-50%, material with carbon element 40-70%, dispersant 0-20%, described collector foil thickness is 5-25 μm,
Water-soluble carbon coating layer thickness is 1-4 μm.
Described water-soluble resin is polyurethane, acrylic resin, polyester resin, water soluble polymer, alkyd resin, propylene
One or more in nitrile multiple copolymer.
Described material with carbon element is one or more in white carbon black, SP, acetylene black, Graphene, graphite, CNT.
Described dispersant be supermolecule dispersant, alkyl phenol polyvinylether, polyacrylate, alkyl polyoxyethylene ether,
One or more in metal tripolyphosphate salt, polysiloxane-based dispersant.
Invention additionally discloses and a kind of be prone to the application in lithium ion battery of carbon coated collector that powder separates with foil.
Invention additionally discloses a kind of recovery method being prone to the carbon coated collector that powder separates with foil, including following step
Rapid:
(1) anode slice of lithium ion battery is cut into a certain size section；
(2) with the water soaking certain time of uniform temperature；
(3) 0-3h is stirred with blender with 20-1000r/min rotating speed；
(4) collector foil is obtained with the screen filtration of aperture >=10mm；
(5) it is filtrated to get active substance separator with 50-1000 eye mesh screen.
Described anode slice of lithium ion battery is sticked to carbon by LiFePO4, cobalt acid lithium, LiMn2O4 or ternary material and is coated with
Cover and form on collector.
Described section area is at 0.001-0.02m2Between.
Described coolant-temperature gage is between 0-100 DEG C, and soak time is at 0-48h.
Described blender is the one in paddle, wheeled, spiral and anchor agitator.
Carbon-coated aluminum foils is to coat the composite of one layer of carbonaceous conductive layer in aluminum foil current collector.Carbon-coated aluminum foils has in reduction
Hinder, improve cycle performance and extend the advantages such as life-span, be used widely in the battery that LiFePO4 is main.It is coated with carbon aluminum
The material with carbon element conductive layer thickness of paper tinsel is 1-4 μm.The water paste of preparation carbon-coated aluminum foils is mainly by graphite granule or white carbon black, dispersant
Form with binding agent.Binding agent and dispersant account between the 20-50% of coating.Battery recycling is also brought by the use of carbon-coated aluminum foils
Bigger motility, when active material is coated in carbon-coated aluminum foils surface, the material with carbon element on PVDF therein and top layer and bonding
Agent combines, and relative to being applied directly on aluminium foil, creates more preferably adhesiving effect.In order to realize aluminium foil and active material
Separate, need the active force of binding agent and the aluminium foil destroying in original carbon coat.
When designing the carbon coat of carbon-coated aluminum foils, the preferable resin of water solublity is used to make binding agent, the spy of these resins
Point is containing more water soluble group, including hydroxyl, carboxyl, anion and cation.Especially contain on main chain or side chain
Relatively polyanionic is (such as COO-) salinization resin, there is preferable water solublity, simultaneously can not be by the organic solvent such as NMP, electrolyte
Dissolve.After film forming, interlaminar resin does not crosslinks, and resin has the corrosion resistance of excellence to ester, alcohol and ketones solvent.Anode sizing agent
With NMP as solvent, electrolyte does not all have corrosiveness containing EC, DEC and DMC equal solvent to coating, but coating runs into water again
Time can rapid solution.When battery recycling, positive plate is immersed in water, uses certain mechanical agitation, positive active material can be made
It is rapidly separated collector, it is achieved aluminium foil quickly efficiently separates with positive electrode active material.This separation method uses water to be solvent, does not has
Having pollution problem, in whipping process, it is only necessary to provide appropriate mixing power, energy consumption is less.
Beneficial effects of the present invention: the aqueous carbon coat aluminum foil current collector of the present invention has higher water solublity, more by force
Resistance to NMP and electrolyte property, preferably processing and serviceability.The method for designing of the present invention is conducive to positive plate of lithium battery to return
Time receiving positive electrode active materials separates with collector, and separates link with water as solvent, and technical process is simply effective, low cost
Honest and clean, energy consumption is low, is the lithium electricity method that reclaims the first public a kind of green high-efficient in field.
Accompanying drawing explanation
Fig. 1 is to use water, NMP, the design sketch of the electrolyte wiping embodiment of the present invention 1 gained carbon-coated aluminum foils.
In figure: 1. immersion cotton swab；2. coating shedding；3. water-soluble carbon coat；4. aluminum foil substrate；5. leaching NMP cotton swab；6.
Leaching electrolyte cotton swab.
Detailed description of the invention
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
In the present invention, collector foil and aluminium foil, current collector aluminum foil are same materials.
Embodiment 1
A kind of being prone to the carbon coated collector that powder separates with foil, including collector foil, the one side of collector foil has
Containing water-soluble carbon coating, water-soluble carbon coating is made up of the raw material of following weight percent content: water soluble acrylic resin
50%, carbon black 50%.Water-soluble carbon coating layer thickness is 2 μm, and current collector aluminum foil thickness is 15 μm, positive and negative coating iron phosphate lithium positive pole
Material, after roll-in, positive and negative thickness is 70 μm.
The present invention is prone to the application in lithium ion battery of carbon coated collector that powder separates with foil.Carbon coating afflux
Body is the composite coating one layer of carbonaceous conductive layer in aluminum foil current collector.Carbon-coated aluminum foils has reduction internal resistance, improves cyclicity
The advantages such as life-span and can be extended, be used widely in the battery that LiFePO4 is main.The material with carbon element of carbon-coated aluminum foils is led
Electric layer thickness is 1-4 μm.The water paste of preparation carbon-coated aluminum foils is mainly by graphite granule or white carbon black, dispersant and binding agent group
Become.Binding agent and dispersant account between the 20-50% of coating.The use of carbon-coated aluminum foils also brings bigger spirit to battery recycling
Activity, when active material is coated in carbon-coated aluminum foils surface, PVDF therein is combined, relatively with material with carbon element and the binding agent on top layer
In being applied directly on aluminium foil, create more preferably adhesiving effect.Separate with active material to realize aluminium foil, need broken
Binding agent in bad original carbon coat and the active force of aluminium foil.
Taking positive plate 1kg, wherein aluminium foil quality is: 70g；Positive electrode is: 930g.Pole piece is cut into average area is
0.01m2Section.
After the water soaking 3h that 5kg temperature is 50 DEG C, proceed to paddle agitator, with 100 r/min rotating speed agitation 1h.
Obtain aluminium foil with the woven wire filter that aperture is 15mm, be dried, be weighed as 74g.
It is filtrated to get positive electrode separator with 150 eye mesh screens, is dried, is weighed as 770g.Remaining turbid solution enters sedimentation
Pond, takes upper strata clear water after sedimentation 1h, and precipitum is part positive electrode, is dried, and is weighed as 120g.
Calculating the positive electrode response rate is: 95.7%；The current collector aluminum foil response rate is close to 100%.Reclaim gained aluminium foil to recover
Metallochrome, does not has visible atrament to adhere to.
Embodiment 2
A kind of being prone to the carbon coated collector that powder separates with foil, including collector foil, the one side of collector foil has
Containing water-soluble carbon coating, water-soluble carbon coating is made up of the raw material of following weight percent content: water-soluble organic silicon is modified
PVA20%, acetylene black 70%, supermolecule dispersant 10%.Water-soluble carbon coating layer thickness is 1 μm, and current collector aluminum foil is 5 μm, positive and negative
Coating lithium iron phosphate positive material, after roll-in, positive and negative thickness is 70 μm.
Taking positive plate 1kg, wherein aluminium foil quality is: 70g；Positive electrode is: 930g.Pole piece is cut into average area is
0.015m2Section.
After the water soaking 0.5h that 6kg temperature is 100 DEG C, proceed to paddle agitator, stir 2h with 20r/min rotating speed.
Obtain aluminium foil with the woven wire filter that aperture is 20mm, be dried, be weighed as 71g.
It is filtrated to get positive electrode separator with 50 eye mesh screens, is dried, is weighed as 720g.Remaining turbid solution enters sedimentation
Pond, takes upper strata clear water after sedimentation 1h, and precipitum is part positive electrode, is dried, and is weighed as 185g.
Calculating the positive electrode response rate is: 97.3%；The aluminium foil response rate is close to 100%.Recovery gained aluminium foil surface does not has can
The atrament attachment seen.
Embodiment 3
A kind of being prone to the carbon coated collector that powder separates with foil, including collector foil, the two-sided of collector foil has
Containing water-soluble carbon coating, water-soluble carbon coating is made up of the raw material of following weight percent content: water-soluble polyester resin 40%,
Graphene 40%, polyacrylate dispersant 20%.Water-soluble carbon coating layer thickness is 4 μm, and aluminium foil is 25 μm, positive and negative coating phosphoric acid
Ferrum lithium anode material, after roll-in, positive and negative thickness is 70 μm.
Taking positive plate 1kg, wherein aluminium foil quality is: 70g；Positive electrode is: 930g.Pole piece is cut into average area is
0.02m2Section.
After the water soaking 48h that 5kg temperature is 0 DEG C, proceed to paddle agitator, stir 3h with 500r/min rotating speed.
Obtain aluminium foil with the woven wire filter that aperture is 10mm, be dried, be weighed as 68g.
It is filtrated to get positive electrode separator with 200 eye mesh screens, is dried, is weighed as 697g.Remaining turbid solution enters sedimentation
Pond, takes upper strata clear water after sedimentation 1h, and precipitum is part positive electrode, is dried, and is weighed as 214g.
Calculating the positive electrode response rate is: 98.0%；The aluminium foil response rate is close to 97%.Reclaim gained aluminium foil surface and do not have visible
Atrament attachment.
Fig. 1 is the test of the embodiment of the present invention 1 water solublity carbon-coated aluminum foils solvent resistance.Wipe with water and reveal paper tinsel for 1 time the most completely, but
The most lossless with NMP and electrolyte wiping 300 times.Illustrate that the carbon coating that the present invention designs is met water and i.e. dissolved, and have preferably
Resistance to NMP and electrolyte property, not by organic solvent corrosion when using in lithium electricity, and reclaim link and be easy to be dissolved in water.
Above content is only to present configuration example and explanation, affiliated those skilled in the art couple
Described specific embodiment makes various amendment or supplements or use similar mode to substitute, without departing from invention
Structure or surmount scope defined in the claims, all should belong to protection scope of the present invention.
Claims (10)
1. it is prone to the carbon coated collector that powder separates with foil, including collector foil, it is characterised in that described afflux
The single or double of body foil has containing water-soluble carbon coating, former by following weight percent content of described water-soluble carbon coating
Material composition: water-soluble resin 20-50%, material with carbon element 40-70%, dispersant 0-20%, described collector foil thickness is 5-25 μ
M, water-soluble carbon coating layer thickness is 1-4 μm.
The most according to claim 1 it is prone to the carbon coated collector that powder separates with foil, it is characterised in that described water-soluble
Property resin is in polyurethane, acrylic resin, polyester resin, water soluble polymer, alkyd resin, acrylonitrile multiple copolymer
One or more.
The most according to claim 1 it is prone to the carbon coated collector that powder separates with foil, it is characterised in that described carbon material
Material is one or more in white carbon black, SP, acetylene black, Graphene, graphite, CNT.
The most according to claim 1 it is prone to the carbon coated collector that powder separates with foil, it is characterised in that described dispersion
Agent is supermolecule dispersant, polyacrylate, alkyl phenol polyvinylether, alkyl polyoxyethylene ether, metal tripolyphosphate salt, poly-silicon
One or more in oxygen alkanes dispersant.
5. one kind is prone to the application in lithium ion battery of carbon coated collector that powder separates with foil.
6. the recovery method being prone to the carbon coated collector that powder separates with foil, it is characterised in that comprise the following steps:
(1) anode slice of lithium ion battery is cut into a certain size section；
(2) with the water soaking certain time of uniform temperature；
(3) 0-3h is stirred with blender with 20-1000r/min rotating speed；
(4) collector foil is obtained with the screen filtration of aperture >=10mm；
(5) it is filtrated to get active substance separator with 50-1000 eye mesh screen.
Method the most according to claim 6, it is characterised in that described anode slice of lithium ion battery by LiFePO4,
Cobalt acid lithium, LiMn2O4 or ternary material stick to form in carbon coated collector.
Method the most according to claim 6, it is characterised in that described section area is at 0.001-0.02 m2Between.
Method the most according to claim 6, it is characterised in that described coolant-temperature gage is between 0-100 DEG C, and soak time exists
0-48h。
Method the most according to claim 6, it is characterised in that described blender is paddle, wheeled, spiral and anchor
One in formula blender.
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| CN109309266A (en) * | 2018-09-20 | 2019-02-05 | 广东工业大学 | A kind of method and regeneration positive electrode of recycling waste lithium ion cell anode material |
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