CN107681160A - A kind of preparation method of utter misery aluminium foil - Google Patents
A kind of preparation method of utter misery aluminium foil Download PDFInfo
- Publication number
- CN107681160A CN107681160A CN201710857446.XA CN201710857446A CN107681160A CN 107681160 A CN107681160 A CN 107681160A CN 201710857446 A CN201710857446 A CN 201710857446A CN 107681160 A CN107681160 A CN 107681160A
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- Prior art keywords
- aluminium foil
- preparation
- utter misery
- misery aluminium
- electrocondution slurry
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention discloses a kind of preparation method of utter misery aluminium foil, comprise the following steps：Electrocondution slurry is fitted into electrostatic spinning apparatus, regulation Static Spinning voltage is 1 15kV, and solution flow rate is 0.1 1.5mLh‑1, the distance of electrostatic spinning nozzle and aluminium foil is 1 20cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil.The present invention is simple to operate, and electrocondution slurry dosage is few and is uniformly distributed on aluminium foil；The utter misery aluminium foil that the present invention is prepared can reduce the internal resistance of cell, improve the energy density and cycle performance of battery.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of preparation method of utter misery aluminium foil.
Background technology
Lithium ion battery has high-energy-density, has extended cycle life, the characteristic of memory-less effect, again have it is safe and reliable and
Energy fast charging and discharging advantage, therefore as the focus of research.Aluminum foil current collector plays attachment activity material and electricity in lithium battery
The function of subconductivity.The grain diameter of lithium battery positive pole active substance is larger so that the contact between particle and collector is a little
Contact with face, reduce the pathway of electronics, so as to add resistance.
Utter misery aluminium foil is uniformly, fine and smoothly to cover scattered conductive nano graphite and carbon black granules on the surface of aluminium foil
On.This coating can provide splendid static conductive performance, the micro-current of active material be collected, so as to be greatly reduced just
Contact resistance between pole material and collector, and adhesive ability between the two can be improved, and then significantly improve the comprehensive of battery
Close performance.
At present, generally electrocondution slurry is coated on aluminium foil to prepare utter misery aluminium foil, but electrocondution slurry dosage is larger, applies
The performance of carbon aluminium foil is not so good, and then influences the performance of prepared battery.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of preparation method of utter misery aluminium foil, the present invention
Simple to operate, electrocondution slurry dosage is few and is uniformly distributed on aluminium foil；The utter misery aluminium foil that the present invention is prepared can reduce battery
Internal resistance, improve the energy density and cycle performance of battery.
A kind of preparation method of utter misery aluminium foil proposed by the present invention, comprises the following steps：Electrocondution slurry is loaded into Static Spinning
In silk device, regulation Static Spinning voltage is 1-15kV, solution flow rate 0.1-1.5mLh-1, electrostatic spinning nozzle and aluminium foil
Distance is 1-20cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil.
Preferably, the solid content of electrocondution slurry is 10-25wt%, viscosity 20-100mPaS.
Preferably, the raw material of electrocondution slurry includes：Conductive powder body, binding agent and solvent.
Preferably, conductive powder body is at least one of graphite, carbon black, acetylene black, graphene, CNT.
Preferably, binding agent is esters of acrylic acid binding agent or vinyl cyanide binding agent.
Preferably, solvent is at least one of deionized water, methanol, ethanol, propyl alcohol, isopropanol.
Preferably, conductive powder body is carbon black and graphite.
Preferably, binding agent is acrylic adhesive.
Preferably, solvent is deionized water.
Preferably, Static Spinning voltage can be 2,3,4,5,6,7,8,9,10,11,12,13 or 4kV, and solution flow rate can be with
For 0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2,1.3 or 1.4mLh-1, electrostatic spinning nozzle and aluminium
The distance of paper tinsel can be 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 or 19cm.
Preferably, Static Spinning voltage is 13kV, solution flow rate 1.0mLh-1, the distance of electrostatic spinning nozzle and aluminium foil
For 12cm.
The present invention by selecting suitable raw material to cooperate obtains electrocondution slurry, and selects suitable solid content and viscosity
Electrocondution slurry, from the method for electrostatic spinning spraying, and select suitable electrospinning parameters so that electrocondution slurry uniformly applies
Overlay on aluminium foil, increase the uniformity of utter misery aluminium foil, and the dosage of electrocondution slurry can be greatly reduced, so as to increase active material
With the electric conductivity between collector utter misery aluminium foil, reduce the internal resistance of cell；The coating for the utter misery aluminium foil that the present invention is prepared is relatively thin,
So as to reduce the surface density of utter misery aluminium foil, the energy density of battery is improved；The utter misery aluminium foil that the present invention is prepared can also increase
Add the peel strength of pole piece active material, improve the cycle performance of battery；And the present invention is simple to operate.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of preparation method of utter misery aluminium foil, comprises the following steps：Electrocondution slurry is fitted into electrostatic spinning apparatus, adjusted
Static Spinning voltage is 8kV, solution flow rate 0.8mLh-1, the distance of electrostatic spinning nozzle and aluminium foil is 10cm, and aluminium foil is carried out
Spraying, then drying obtain utter misery aluminium foil.
Embodiment 2
A kind of preparation method of utter misery aluminium foil, comprises the following steps：It is 10wt%, viscosity 100mPaS by solid content
Electrocondution slurry is fitted into electrostatic spinning apparatus, and regulation Static Spinning voltage is 1kV, solution flow rate 1.5mLh-1, electrostatic spinning spray
The distance of head and aluminium foil is 1cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil, wherein, the raw material bag of electrocondution slurry
Include：Acetylene black, vinyl cyanide binding agent and isopropanol.
Embodiment 3
A kind of preparation method of utter misery aluminium foil, comprises the following steps：It is 25wt% by solid content, viscosity is led for 20mPaS
Plasma-based material is fitted into electrostatic spinning apparatus, and regulation Static Spinning voltage is 15kV, solution flow rate 0.1mLh-1, electrostatic spinning spray
The distance of head and aluminium foil is 20cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil, wherein, the raw material of electrocondution slurry
Including：Graphite, CNT, esters of acrylic acid binding agent, ethanol, propyl alcohol.
Embodiment 4
A kind of preparation method of utter misery aluminium foil, comprises the following steps：It is 15wt% by solid content, viscosity is led for 80mPaS
Plasma-based material is fitted into electrostatic spinning apparatus, and regulation Static Spinning voltage is 6kV, solution flow rate 1.1mLh-1, electrostatic spinning nozzle
Distance with aluminium foil is 5cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil, wherein, the raw material bag of electrocondution slurry
Include：Carbon black, graphene, acrylic adhesive and methanol.
Embodiment 5
A kind of preparation method of utter misery aluminium foil, comprises the following steps：It is 20wt% by solid content, viscosity is led for 40mPaS
Plasma-based material is fitted into electrostatic spinning apparatus, and regulation Static Spinning voltage is 10kV, solution flow rate 0.5mLh-1, electrostatic spinning spray
The distance of head and aluminium foil is 15cm, and aluminium foil is sprayed, and then drying obtains utter misery aluminium foil, wherein, the raw material of electrocondution slurry
Including：Graphite, carbon black, acetylene black, acrylic adhesive, ionized water, methanol, ethanol.
Embodiment 6
A kind of preparation method of utter misery aluminium foil, comprises the following steps：
Graphite powder, carbon black are added in deionized water after soaking 20h, add acrylic adhesive, then move at a high speed
Dispersion machine high speed disperses 0.5h, is homogenized 0.5h, crosses 100 mesh sieves and obtains electrocondution slurry, wherein, graphite powder, the weight ratio of carbon black
For 1：1, carbon black, deionized water, the weight of acrylic adhesive ratio are 20：180：1, the solid content of electrocondution slurry is
10.5wt%, viscosity 31mPaS；
Electrocondution slurry is fitted into electrostatic spinning apparatus, regulation Static Spinning voltage is 13kV, solution flow rate 1.0mLh-1, the distance of electrostatic spinning nozzle and aluminium foil is 12cm, and aluminium foil is sprayed, and after aluminium foil surface sprays full electrocondution slurry, is placed in
Drying obtains utter misery aluminium foil in baking oven.
Embodiment 7
A kind of preparation method of utter misery aluminium foil, comprises the following steps：
Graphite powder, carbon black are added in deionized water after soaking 20h, add acrylic adhesive, then move at a high speed
Dispersion machine high speed disperses 0.5h, is homogenized 0.5h, crosses 100 mesh sieves and obtains electrocondution slurry, wherein, graphite powder, the weight ratio of carbon black
For 7：3, carbon black, deionized water, the weight of acrylic adhesive ratio are 20：180：1, the solid content of electrocondution slurry is
10.5wt%, viscosity 31mPaS；
Electrocondution slurry is fitted into electrostatic spinning apparatus, regulation Static Spinning voltage is 15kV, solution flow rate 0.8mLh-1, the distance of electrostatic spinning nozzle and aluminium foil is 10cm, and aluminium foil is sprayed, and after aluminium foil surface sprays full electrocondution slurry, is placed in
Drying obtains utter misery aluminium foil in baking oven.
Test example
Using aluminium foil as control group, positive electrode is coated in utter misery aluminium foil, embodiment 7 that embodiment 6 is prepared respectively and made
On standby obtained utter misery aluminium foil and aluminium foil, with LiFePO4It is positive electrode, graphite as negative pole, LiPF6Solution as electrolyte,
Through hot pressing, assembling is melted into, obtains lithium ion battery after partial volume, carries out electrical performance data detections to three groups of lithium ion batteries, as a result
Such as following table：
| Project | Internal resistance m Ω | Thickness mm | Peel strength N/m | % is compared in 1C constant currents |
| Embodiment 6 | 1.44 | 19.04 | 0.24 | 98.56 |
| Embodiment 7 | 1.45 | 19.11 | 0.23 | 98.45 |
| Control group | 1.51 | 19.21 | 0.18 | 97.91 |
As can be seen from the above table using the utter misery aluminum foil thickness that is prepared of the present invention is thinner, peel strength is high, its is made
Standby lithium ion battery internal resistance is low, energy density and good cycle.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of utter misery aluminium foil, it is characterised in that comprise the following steps：Electrocondution slurry is loaded into electrostatic spinning dress
In putting, regulation Static Spinning voltage is 1-15kV, solution flow rate 0.1-1.5mLh-1, the distance of electrostatic spinning nozzle and aluminium foil
For 1-20cm, aluminium foil is sprayed, then drying obtains utter misery aluminium foil.
2. the preparation method of utter misery aluminium foil according to claim 1, it is characterised in that the solid content of electrocondution slurry is 10-
25wt%, viscosity 20-100mPaS.
3. the preparation method of utter misery aluminium foil according to claim 1 or claim 2, it is characterised in that the raw material of electrocondution slurry includes：Lead
Electric powder, binding agent and solvent.
4. the preparation method of utter misery aluminium foil according to claim 3, it is characterised in that conductive powder body is graphite, carbon black, acetylene
At least one of black, graphene, CNT.
5. according to the preparation method of the utter misery aluminium foil of claim 3 or 4, it is characterised in that binding agent glues for esters of acrylic acid
Tie agent or vinyl cyanide binding agent.
6. according to the preparation method of any one of the claim 3-5 utter misery aluminium foils, it is characterised in that solvent be deionized water,
At least one of methanol, ethanol, propyl alcohol, isopropanol.
7. according to the preparation method of any one of the claim 3-6 utter misery aluminium foils, it is characterised in that conductive powder body be carbon black and
Graphite.
8. according to the preparation method of any one of the claim 3-7 utter misery aluminium foils, it is characterised in that binding agent is acrylic compounds
Binding agent.
9. according to the preparation method of any one of the claim 3-8 utter misery aluminium foils, it is characterised in that solvent is deionized water.
10. according to the preparation method of any one of the claim 1-9 utter misery aluminium foils, it is characterised in that Static Spinning voltage is
13kV, solution flow rate 1.0mLh-1, the distance of electrostatic spinning nozzle and aluminium foil is 12cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710857446.XA CN107681160A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of utter misery aluminium foil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710857446.XA CN107681160A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of utter misery aluminium foil |
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| CN107681160A true CN107681160A (en) | 2018-02-09 |
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| CN201710857446.XA Pending CN107681160A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of utter misery aluminium foil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666580A (en) * | 2018-04-13 | 2018-10-16 | 北京卫蓝新能源科技有限公司 | A kind of polymer three-dimensional collector, preparation method and application |
| CN109411762A (en) * | 2018-09-28 | 2019-03-01 | 桑顿新能源科技有限公司 | A kind of utter misery aluminium foil and preparation method thereof |
| CN110854356A (en) * | 2019-11-27 | 2020-02-28 | 安徽江淮汽车集团股份有限公司 | Method for coating conductive powder on metal foil |
| CN112864398A (en) * | 2021-01-27 | 2021-05-28 | 江苏智泰新能源科技有限公司 | Conductive coating, coating method and application |
| CN115117365A (en) * | 2022-07-27 | 2022-09-27 | 湖北亿纬动力有限公司 | Carbon-coated current collector and preparation method and application thereof |
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| CN110854356A (en) * | 2019-11-27 | 2020-02-28 | 安徽江淮汽车集团股份有限公司 | Method for coating conductive powder on metal foil |
| CN112864398A (en) * | 2021-01-27 | 2021-05-28 | 江苏智泰新能源科技有限公司 | Conductive coating, coating method and application |
| CN115117365A (en) * | 2022-07-27 | 2022-09-27 | 湖北亿纬动力有限公司 | Carbon-coated current collector and preparation method and application thereof |
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