CN108695518A - A kind of preparation method of anode for lithium battery collector - Google Patents
A kind of preparation method of anode for lithium battery collector Download PDFInfo
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- CN108695518A CN108695518A CN201710231618.2A CN201710231618A CN108695518A CN 108695518 A CN108695518 A CN 108695518A CN 201710231618 A CN201710231618 A CN 201710231618A CN 108695518 A CN108695518 A CN 108695518A
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- lithium battery
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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
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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
- 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
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
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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
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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
- H01M4/668—Composites of electroconductive material and synthetic resins
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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 methods of anode for lithium battery collector, include the following steps:(1)First weigh the raw material of different ratio:Carbon fiber(CF), conductive agent carbon black(SP), binder(PVDF), N- methyl pyrrole network alkanones(NMP);(2)It takes NMP and PVDF to pour into agate jar successively, makes its dispersion as possible;(3)It weighs agate abrading-ball to be added in ball grinder, controls rotating speed and time;(4)The CF weighed and SP are gradually sprinkling upon in ball grinder successively, then added in NMP to ball grinder, rotating speed and time are controlled;(5)Slurry is coated on preprepared aluminium foil with coating machine and forms conductive layer, conductive layer thickness on aluminium collector is controlled after drying.Using above-mentioned technical proposal, not only technique itself is easy to operate, but also can increase substantially the electric conductivity between collector and material, and drop ground internal resistance is conducive to giving full play to for the practical high rate performance of lithium ion battery.
Description
Technical field
Lithium ion battery manufacturing field belonging to the present invention, more particularly to a kind of preparation side of anode for lithium battery collector
Method.
Background technology
With the fast development of society, people are continuously increased resource and energy demand, especially in present water and sky
In the environment of gas pollution, thirsts for a kind of new energy and replace traditional fossil energy.Currently, lithium ion battery is more next as new energy
The approval of people is more obtained, however the performance indicators such as the high rate performance of lithium battery and energy density are relatively low, especially high rate performance
Demand it is increasing.Therefore, a kind of performance methodology that can put forward lithium battery multiplying power of searching is current field of lithium research
One big hot spot.
Lithium ion battery mainly has the compositions such as positive and negative pole material, diaphragm, electrolyte and collector, and lithium battery is forthright again
Energy major influence factors are the diffusion mobility speed of lithium ion, the electric conductivity of the electric conductivity of collector and material itself.Material sheet
The poorly conductive of body can be solved with conductive agent, and the present invention is then to improve the electric conductivity between collector and active material to improve
The high rate performance of lithium ion battery.A kind of new technique is designed to prepare novel plus plate current-collecting body, material and collector it
Between formed one be conducive to electronics transmission channel, reduce internal resistance, to improve the charge-discharge magnification performance of lithium ion battery.
Invention content
The object of the present invention is to provide a kind of preparation methods of anode for lithium battery collector.
Technical solution is as follows, a kind of preparation method of anode for lithium battery collector, which is characterized in that including following step
Suddenly:
A, the raw material of following weight percentage proportioning is weighed:Carbon fiber(CF)12.5%-22.5%, conductive agent carbon black(SP)70.0%-
85.0%, binder(PVDF)2.5%-7.5%, N- methyl pyrrole network alkanone(NMP)Solvent quality is 1.0-1.5 times of total material weight;
B, it takes NMP and PVDF in step a to pour into agate jar successively, makes its dispersion as possible;
C, agate abrading-ball is weighed(Abrading-ball ratio 1.5-3.0)It is added in ball grinder, rotating speed 500-600rpm, time 3-5h, abrading-ball ratio
It refer to the ratio of the quality and CF and SP gross masses of required abrading-ball;
D, it waits for that time is up by step c, the CF weighed in step a and SP is taken gradually to be sprinkling upon in ball grinder successively, then add NMP to ball milling
In tank, the amount for adjusting NMP is 0.1-1.0 times, rotating speed 500-600rpm, time 2-4h of CF and SP gross masses;
F, it waits for that time is up by d, slurry is coated on preprepared aluminium foil with coating machine and forms conductive layer, is controlled after drying
Conductive layer thickness is 5-20 μm on aluminium collector, this aluminium foil is known as applying CF-SP aluminium foils.
According to a kind of preparation method of anode for lithium battery collector described in claim 1, which is characterized in that adjust
NMP amounts are 40%-50% come the solid content for controlling its slurry afterwards.
A kind of preparation method of anode for lithium battery collector according to step b, c and d in claim 1, it is special
Sign is that Ball-milling Time is controlled in 5-9h.
A kind of preparation method of anode for lithium battery collector according to step f in claim 1, feature exist
In it is 5-20 μm to control conductive layer thickness on aluminium collector.
Practical beneficial effect of the present invention:Using above-mentioned technical proposal, not only technique itself is easy to operate, but also can be substantially
Degree improves the electric conductivity between collector and material, and drop ground internal resistance is conducive to the abundant hair of the practical high rate performance of lithium ion battery
It waves.
Description of the drawings
Fig. 1 is the electrochemical performance data of the ternary lithium battery of 1 gained of the embodiment of the present invention.
Specific implementation mode
The main flow that ternary (NCM532) type lithium ion battery makes:The preparation of slurry(Dispensing, stirring)→ pole piece
Preparation(Coating drying, is cut, rolling)The preparation of → battery core(Spot welding, winding, fluid injection)→ chemical conversion and test(Chemical conversion activation,
Secondary encapsulation, test), anode is ternary material+Al foil collectors, and cathode is artificial graphite+Cu foil collectors, and diaphragm is single layer
PP films, electrolyte are LiPF6Organic electrolyte, a concentration of 1mol/L.
Detection method:
(1)According to ternary battery old process, in addition to plus plate current-collecting body difference(Conventional aluminium foil and painting CF-SP aluminium foils), other
All, finished battery design capacity is 1000mAh for material and technique, and two kinds of different plus plate current-collecting bodies respectively prepare 6 monomer electricity
Pond is averaged and compares data;
(2)The single battery that different plus plate current-collecting bodies make, its practical positive electrode specific capacity is measured with partial volume instrument;
(3)Various finished batteries use 1C constant-current charges, blanking voltage 4.2V then to use 0.2C, 1C, 2C constant-current discharge, cut
Only voltage 3.0V detects high rate performance.
Embodiment 1
The present embodiment painting CF-SP aluminium foil plus plate current-collecting bodies using the present invention, are manufactured according to ternary lithium battery routine production process
1000mAh single batteries apply CF-SP aluminium foil plus plate current-collecting bodies according to following technique to prepare:
A, the raw material of following weight percentage proportioning is weighed:Carbon fiber(12.5%)1.25g, conductive agent carbon black(83%)8.3g glues
Tie agent(4.5%)0.45g, N- methyl pyrrole network alkanone(NMP)Solvent quality is 1.5 times of total material weight, quality 15g;
B, it takes NMP and PVDF in step a to pour into agate jar successively, makes its dispersion as possible;
C, agate abrading-ball is weighed(Abrading-ball is than 1.5)14.3g or so is added in ball grinder, rotating speed 500rpm, time 3h;
D, it waits for that time is up by step c, the CF weighed in step a and SP is taken gradually to be sprinkling upon in ball grinder successively, then add NMP to ball
In grinding jar, the amount for adjusting NMP is 0.1 times, quality 1g, rotating speed 500rpm of CF and SP gross masses, time 2h;
F, it waits for that time is up by d, slurry is coated on preprepared aluminium foil with coating machine and forms conductive layer, is controlled after drying
Conductive layer thickness is 10 μm on aluminium collector.
532 single battery performance detection data such as Fig. 1 of ternary.
Comparative example 1
The present embodiment is to use ternary lithium battery routine aluminium foil plus plate current-collecting body, is manufactured according to ternary lithium battery routine production process
1000mAh single batteries.
532 single battery performance detection data such as Fig. 1 of its ternary.
It can be seen that from the data in Fig. 1 using the plus plate current-collecting body for applying CF-SP aluminium foils as lithium ion battery, electricity
The discharge-rate performance in pond is substantially better than conventional aluminium foil.Not only technological operation is simple by the present invention, but also is more conducive to lithium ion
The raising of the performance of battery actual specific capacity, high rate performance and cycle performance.
Claims (4)
1. this patent is related to a kind of preparation method of anode for lithium battery collector, which is characterized in that include the following steps:
A, the raw material of following weight percentage proportioning is weighed:Carbon fiber(CF)12.5%-22.5%, conductive agent carbon black(SP)70.0%-
85.0%, binder(PVDF)2.5%-7.5%, N- methyl pyrrole network alkanone(NMP)Solvent quality is 1.0-1.5 times of total material weight;
B, it takes NMP and PVDF in step a to pour into agate jar successively, makes its dispersion as possible;
C, agate abrading-ball is weighed(Abrading-ball ratio 1.5-3.0)It is added in ball grinder, rotating speed 500-600rpm, time 3-5h, abrading-ball ratio
It refer to the ratio of the quality and CF and SP gross masses of required abrading-ball;
D, it waits for that time is up by step c, the CF weighed in step a and SP is taken gradually to be sprinkling upon in ball grinder successively, then add NMP to ball milling
In tank, the amount for adjusting NMP is 0.1-1.0 times, rotating speed 500-600rpm, time 2-4h of CF and SP gross masses;
F, it waits for that time is up by d, slurry is coated on preprepared aluminium foil with coating machine and forms conductive layer, is controlled after drying
Conductive layer thickness is 5-20 μm on aluminium collector.
2. according to a kind of preparation method of anode for lithium battery collector described in claim 1, which is characterized in that after adjusting
NMP amounts are 40%-50% come the solid content for controlling its slurry.
3. a kind of preparation method of anode for lithium battery collector according to step b, c and d in claim 1, feature
It is, Ball-milling Time is controlled in 5-9h.
4. a kind of preparation method of anode for lithium battery collector according to step f in claim 1, which is characterized in that
It is 5-20 μm to control conductive layer thickness on aluminium collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710231618.2A CN108695518A (en) | 2017-04-11 | 2017-04-11 | A kind of preparation method of anode for lithium battery collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710231618.2A CN108695518A (en) | 2017-04-11 | 2017-04-11 | A kind of preparation method of anode for lithium battery collector |
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| CN108695518A true CN108695518A (en) | 2018-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661004A (en) * | 2019-08-23 | 2020-01-07 | 河南豫清新能源产业有限公司 | Method for removing oxidation film of lithium battery aluminum foil |
| CN112151806A (en) * | 2020-09-15 | 2020-12-29 | 浙江长宇新材料有限公司 | Ultra-light multilayer composite current collector and preparation method thereof |
-
2017
- 2017-04-11 CN CN201710231618.2A patent/CN108695518A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661004A (en) * | 2019-08-23 | 2020-01-07 | 河南豫清新能源产业有限公司 | Method for removing oxidation film of lithium battery aluminum foil |
| CN112151806A (en) * | 2020-09-15 | 2020-12-29 | 浙江长宇新材料有限公司 | Ultra-light multilayer composite current collector and preparation method thereof |
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Application publication date: 20181023 |
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| WD01 | Invention patent application deemed withdrawn after publication |