CN109390550A - A kind of positive pole aluminium foil collector performance improvement method - Google Patents
A kind of positive pole aluminium foil collector performance improvement method Download PDFInfo
- Publication number
- CN109390550A CN109390550A CN201811244175.1A CN201811244175A CN109390550A CN 109390550 A CN109390550 A CN 109390550A CN 201811244175 A CN201811244175 A CN 201811244175A CN 109390550 A CN109390550 A CN 109390550A
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- CN
- China
- Prior art keywords
- aluminium foil
- positive pole
- pole aluminium
- foil collector
- performance improvement
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Classifications
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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
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
-
- 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
- H01M4/04—Processes of manufacture in general
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
-
- 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
Abstract
The present invention relates to cell positive material technical fields, especially a kind of positive pole aluminium foil collector performance improvement method, by being pre-processed to aluminium foil surface using pretreatment fluid, it is disposed of the spot of aluminium foil surface, so that metallic matrix is completely exposed, but also some acid ions can be loaded to metal base surface, so that under not washed, it enters in sodium fluoborate solution and is handled, and then help to form microporous barrier in metal base surface, not only increase the toughness of aluminium foil, so that aluminium foil can combine closely with adhesive, enhance adhesive strength, improve peel strength.
Description
Technical field
The present invention relates to cell positive material technical field, especially a kind of positive pole aluminium foil collector performance improvement method.
Background technique
Lithium ion battery has the advantages that voltage is high, energy density height, memory-less effect, has extended cycle life, self discharge is low etc.,
It is widely used.The performance of positive electrode will dominate the performance of lithium ion battery.Currently, lithium ion battery is mainly by organic
The components such as electrolyte, diaphragm, anode, cathode, collector composition.The liquid state organic electrolyte used due to lithium ion battery is led
Electric energy power is weaker, in order to realize the high rate during charging-discharging of lithium ion battery, the positive electrode and cathode material of lithium ion battery
Material be generally all processed into it is powdered, then by the powder of positive electrode or the powder of negative electrode material, using adhesives in afflux
On body, the collection of electric current is realized.Therefore, for lithium ion battery, surface appearance, collector and the positive electrode of collector
Contact impedance, collector between negative electrode material the surface appearance situation of change in charge and discharge process, it is equal to the performance of battery
Having largely influences, such as: when charging, the positive pole aluminium foil collector of lithium ion battery is easy to happen passivation and increases electricity
The polarization of pole, so that the charge-discharge performance of battery is decreased obviously；Between the positive pole aluminium foil collector and positive electrode of lithium ion battery
Be bonded it is insecure and the phenomenon that lose powder, affect the security performance of battery charge and discharge performance and battery.
When the powder and aluminum foil current collector of anode material for lithium-ion batteries bond, adhesive segment is by by bonding aluminium foil, glue
The composition such as stick and graphite agent；Currently, less to the research handled by bonding aluminium foil surface, be all mainly by
Preparatory graphene coated or carbon dust etc. in the aluminum foil current collector of lithium ion cell positive, it is real to reach the performance for improving aluminium foil
Now inhibit battery polarization, reduces fuel factor, improve high rate performance, reduce the effects of internal resistance of cell.But in the prior art,
It is inappropriate due to handling glued aluminium foil surface, cause using during adhesive bonding aluminium foil, adhesive strength is not high, makes
It is poor application performance must to be bonded.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of positive pole aluminium foil collector performance
Ameliorative way.
It is achieved particular by following technical scheme:
The first purpose of the invention is to provide positive pole aluminium foil collector performance improvement method, comprising the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 10-20s at 40-50 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, handles 30-50s at 80-100 DEG C, adopts
Rinsed well with clear water, dry to get；The pretreatment fluid is by sodium sulphate 2-8g/L, potassium acetate 1-3g/L, octyl phenol
Polyoxyethylene ether 5-7g/L and water composition；The sodium fluoborate solution be by phosphate 4-11g/L, ammonium fluoride 1-5g/L,
Acetate 3-8g/L, sodium fluoborate 14-17g/L and water composition.It is handled by aluminium foil using pretreatment fluid, it can not only
The spot for removing aluminium foil surface, additionally aids aluminum foil metal matrix and exposes completely, so that processed in sodium fluoborate solution
Journey, in the environment of capable of existing with phosphate, ammonium fluoride, acetate and sodium fluoborate, so that forming micropore in metal surface
Film, and then enhance aluminium foil toughness and adhesive property, so that adhesive coated after aluminium foil surface, can penetrate into aluminium foil table
In the micropore in face, adhesive strength is improved, enhances adhesive property.
It is preferred that the phosphate is one of potassium dihydrogen phosphate, sodium dihydrogen phosphate, calcium dihydrogen phosphate or several
Any mixing ratio mixing.
It is preferred that the acetate is one of zinc acetate, potassium acetate or the mixing of two kinds of any mass ratio.
It is preferred that the sodium fluoborate solution is by phosphate 8g/L, ammonium fluoride 3g/L, acetate 5g/L, sodium fluoborate
16g/L and water composition.
The pretreatment fluid is by sodium sulphate 5g/L, potassium acetate 2g/L, Octylphenol polyoxyethylene ether 6g/L and water
Composition.
The positive pole aluminium foil collector that the method for the invention improves is the bonding anode using adhesive coated behind surface
Material is applied to lithium battery, lithium ion battery, polymer battery or superbattery.
It is preferred that the adhesive is that 2g polyvinylidene fluoride resin is dissolved in 30-40ml dimethyl acetamide, add
The dissolution of 1-2g acrylic resin, stirs evenly and is prepared.Through use the adhesive, can increase substantially with it is processed
The bonding force of aluminium foil surface enhances peel strength.
The second purpose of the invention is to provide for being bonded positive pole aluminium foil collector and cell positive material powder
2g polyvinylidene fluoride resin is dissolved in 30-40ml dimethyl acetamide by adhesive preparation method, adds 1-2g acrylic acid tree
Liposoluble solution under room temperature, is stirred evenly and is prepared.
Compared with prior art, the technical effect of the invention is embodied in:
By using pretreatment fluid pretreatment, being disposed of the spot of aluminium foil surface aluminium foil surface, so that
Metallic matrix is completely exposed, but also can load some acid ions to metal base surface, so that under not washed, into
Enter into sodium fluoborate solution and handled, and then help to form microporous barrier in metal base surface, not only increases aluminium foil
Toughness enhance adhesive strength so that aluminium foil can combine closely with adhesive, improve peel strength.
Especially in combination with the preparation and selection to adhesive component, so that being used for using the adhesive to after above-mentioned process
Aluminium foil carries out coating gluing cell positive material powder, will not lose powder, and adhesive strength is higher, reduce impedance.
Specific embodiment
It is limited below with reference to specific embodiment technical solution of the present invention is further, but claimed
Range is not only limited to made description.
Embodiment 1
Positive pole aluminium foil collector performance improvement method, comprising the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 10s at 40 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, handles 30s at 80 DEG C, is rushed using clear water
Wash clean, dry to get.
The pretreatment fluid is by sodium sulphate 2g/L, potassium acetate 1g/L, Octylphenol polyoxyethylene ether 5g/L and water
Composition；
The sodium fluoborate solution is by sodium dihydrogen phosphate 4g/L, ammonium fluoride 1g/L, zinc acetate 3g/L, sodium fluoborate
14g/L and water composition.
Embodiment 2
Positive pole aluminium foil collector performance improvement method, comprising the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 20s at 50 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, 50s is handled at 100 DEG C, using clear water
Rinse well, dry to get.
The pretreatment fluid is by sodium sulphate 8g/L, potassium acetate 3g/L, Octylphenol polyoxyethylene ether 7g/L and water
Composition；
The sodium fluoborate solution is by the mass mixings 11g/L such as potassium dihydrogen phosphate and calcium dihydrogen phosphate, ammonium fluoride 5g/
L, potassium acetate 8g/L, sodium fluoborate 17g/L and water composition.
Embodiment 3
Positive pole aluminium foil collector performance improvement method, comprising the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 15s at 45 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, handles 40s at 90 DEG C, is rushed using clear water
Wash clean, dry to get.
The pretreatment fluid is by sodium sulphate 6g/L, potassium acetate 2g/L, Octylphenol polyoxyethylene ether 6g/L and water
Composition；
The sodium fluoborate solution is by the mass ratioes mixing such as calcium dihydrogen phosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate 8g/
L, ammonium fluoride 3g/L, the mass mixings 5g/L, sodium fluoborate 16g/L such as zinc acetate and potassium acetate and water composition.
Embodiment 4
Positive pole aluminium foil collector performance improvement method, comprising the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 20s at 40 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, 50s is handled at 80-100 DEG C, using clear
Water is rinsed well, dry to get.
The pretreatment fluid is by sodium sulphate 8g/L, potassium acetate 2g/L, Octylphenol polyoxyethylene ether 5g/L and water
Composition；
The sodium fluoborate solution is by calcium dihydrogen phosphate 11g/L, ammonium fluoride 1g/L, the quality such as zinc acetate and potassium acetate
Mix 3g/L, sodium fluoborate 15g/L and water composition.
Embodiment 5
For being bonded the adhesive preparation method of positive pole aluminium foil collector and cell positive material powder, by 2g polyvinylidene fluoride
Olefine resin is dissolved in 30ml dimethyl acetamide, is added 1g acrylic resin and is dissolved, under room temperature, stirs evenly and be prepared.
Embodiment 6
For being bonded the adhesive preparation method of positive pole aluminium foil collector and cell positive material powder, by 2g polyvinylidene fluoride
Olefine resin is dissolved in 40ml dimethyl acetamide, is added 2g acrylic resin and is dissolved, under room temperature, stirs evenly and be prepared.
Embodiment 7
For being bonded the adhesive preparation method of positive pole aluminium foil collector and cell positive material powder, by 2g polyvinylidene fluoride
Olefine resin is dissolved in 35ml dimethyl acetamide, adds the dissolution of 1.5g acrylic resin, under room temperature, stir evenly preparation and
At.
Embodiment 8
For being bonded the adhesive preparation method of positive pole aluminium foil collector and cell positive material powder, by 3g polyvinylidene fluoride
Olefine resin is dissolved in 29ml dimethyl acetamide and is prepared.
Embodiment 9
As different from Example 5: 2.5g acrylic resin.
Embodiment 10
As different from Example 6: 0.5g acrylic resin.
Embodiment 11
As different from Example 6: 1g acrylic resin.
The invention is respectively coated on the aluminium foil of embodiment 1-4 preparation using adhesive prepared by embodiment 8, and is passed through
After crossing 180 DEG C of heat treatment 10min, its peel strength is measured；Meanwhile the aluminium foil for preparing the adhesive of coating embodiment 8 uses
Lithium iron phosphate positive material powder sample, the charge and discharge under 2C multiplying power electric current, and to its cyclic discharge capacity and 50 time for the first time
Cyclic discharge capacity is detected, and result is as shown in table 1 below:
Table 1
By 1 data of table show it can be seen from for the invention treated aluminium foil, peel strength maintain compared with
Height, and enable to the discharge capacity attenuation rate for the battery being prepared lower, performance is stablized.
Further, this researcher in view of the above technology, studies the adhesive component of use, and with embodiment
The aluminum foil current collector of 2 preparations carries out being coated in its surface using adhesive prepared by embodiment 5-11 as test material, and adopts
After 180 DEG C of heat treatment 10min, its peel strength is measured, result is as shown in table 2 below:
Table 2
| Peel strength (N/mm2) | |
| Embodiment 5 | 0.0902 |
| Embodiment 6 | 0.0877 |
| Embodiment 7 | 0.0894 |
| Embodiment 8 | 0.0805 |
| Embodiment 9 | 0.0764 |
| Embodiment 10 | 0.0776 |
| Embodiment 11 | 0.0913 |
By the data of table 2 show it can be seen from for adhesive rational proportion and raw material selection, will be helpful to
The intensity and peeling resistance for improving bonding, especially for the control of the additional amount of material composition, it will pair of high degree
Adhesive adhesive property impacts, and the reasonable collocation of material composition progress and proportion to adhesive are passed through in the invention
Design enhances so as to effectively improve the Nian Jie performance of the aluminum foil current collector improved in adhesive and the invention
Peel strength.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of positive pole aluminium foil collector performance improvement method, which comprises the following steps:
(1) aluminium foil is used into pretreatment fluid immersion treatment 10-20s at 40-50 DEG C；
(2) by step (1), treated that aluminium foil is placed in sodium fluoborate solution, 30-50s is handled at 80-100 DEG C, using clear
Water is rinsed well, dry to get.
The pretreatment fluid be by sodium sulphate 2-8g/L, potassium acetate 1-3g/L, Octylphenol polyoxyethylene ether 5-7g/L and
Water composition；
The sodium fluoborate solution is by phosphate 4-11g/L, ammonium fluoride 1-5g/L, acetate 3-8g/L, sodium fluoborate 14-
17g/L and water composition.
2. positive pole aluminium foil collector performance improvement method as described in claim 1, which is characterized in that the phosphate is phosphorus
One of acid dihydride potassium, sodium dihydrogen phosphate, calcium dihydrogen phosphate or the mixing of several any mixing ratios.
3. positive pole aluminium foil collector performance improvement method as described in claim 1, which is characterized in that the acetate is vinegar
One of sour zinc, potassium acetate or the mixing of two kinds of any mass ratio.
4. positive pole aluminium foil collector performance improvement method as described in claim 1, which is characterized in that the sodium fluoborate is molten
Liquid is by phosphate 8g/L, ammonium fluoride 3g/L, acetate 5g/L, sodium fluoborate 16g/L and water composition.
5. positive pole aluminium foil collector performance improvement method as described in claim 1, which is characterized in that the pretreatment fluid is
By sodium sulphate 5g/L, potassium acetate 2g/L, Octylphenol polyoxyethylene ether 6g/L and water composition.
6. the positive pole aluminium foil collector that the method according to claim 1 to 5 improves.
7. the positive pole aluminium foil collector that the method according to claim 1 to 5 improves is using adhesive coated on surface
Afterwards, it is bonded positive electrode, is applied to lithium battery, lithium ion battery, polymer battery or superbattery.
8. the use as claimed in claim 7, which is characterized in that the adhesive is to be dissolved in 2g polyvinylidene fluoride resin
In 30-40ml dimethyl acetamide, the dissolution of 1-2g acrylic resin is added, stirs evenly and is prepared.
9. a kind of for being bonded the adhesive preparation method of positive pole aluminium foil collector and cell positive material powder, feature exists
In: 2g polyvinylidene fluoride resin is dissolved in 30-40ml dimethyl acetamide, the dissolution of 1-2g acrylic resin, room temperature are added
Under, it stirs evenly and is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811244175.1A CN109390550A (en) | 2018-10-24 | 2018-10-24 | A kind of positive pole aluminium foil collector performance improvement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811244175.1A CN109390550A (en) | 2018-10-24 | 2018-10-24 | A kind of positive pole aluminium foil collector performance improvement method |
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| Publication Number | Publication Date |
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| CN201811244175.1A Pending CN109390550A (en) | 2018-10-24 | 2018-10-24 | A kind of positive pole aluminium foil collector performance improvement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140734A (en) * | 2021-04-06 | 2021-07-20 | 河北师范大学 | Method for preparing modified current collector aluminum foil at room temperature |
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|---|---|---|---|---|
| CN1277236A (en) * | 2000-06-08 | 2000-12-20 | 华南理工大学 | Adhesive for lithium ion cell |
| CN103397318A (en) * | 2013-08-02 | 2013-11-20 | 石欣 | Metal anti-rust phosphating solution |
| CN103840170A (en) * | 2014-03-31 | 2014-06-04 | 福建师范大学 | Method for modifying positive aluminum-foil current collector by two-section method and by using phosphoric acid-sodium fluoride-chromic anhydride |
| CN103872336A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for modifying positive aluminum foil current collector by utilizing phosphoric acid-fluorine-dichromate |
| CN103872335A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for modifying positive aluminum foil current collector by utilizing phosphoric acid-sodium fluoride-chromic anhydride |
| CN103872334A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for improving performance of positive aluminum foil current collector by utilizing two-step method and fluoboric acid |
| EP3282503A1 (en) * | 2015-04-07 | 2018-02-14 | LG Chem, Ltd. | Electrode and method for manufacturing same |
-
2018
- 2018-10-24 CN CN201811244175.1A patent/CN109390550A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277236A (en) * | 2000-06-08 | 2000-12-20 | 华南理工大学 | Adhesive for lithium ion cell |
| CN103397318A (en) * | 2013-08-02 | 2013-11-20 | 石欣 | Metal anti-rust phosphating solution |
| CN103840170A (en) * | 2014-03-31 | 2014-06-04 | 福建师范大学 | Method for modifying positive aluminum-foil current collector by two-section method and by using phosphoric acid-sodium fluoride-chromic anhydride |
| CN103872336A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for modifying positive aluminum foil current collector by utilizing phosphoric acid-fluorine-dichromate |
| CN103872335A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for modifying positive aluminum foil current collector by utilizing phosphoric acid-sodium fluoride-chromic anhydride |
| CN103872334A (en) * | 2014-03-31 | 2014-06-18 | 福建师范大学 | Method for improving performance of positive aluminum foil current collector by utilizing two-step method and fluoboric acid |
| EP3282503A1 (en) * | 2015-04-07 | 2018-02-14 | LG Chem, Ltd. | Electrode and method for manufacturing same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140734A (en) * | 2021-04-06 | 2021-07-20 | 河北师范大学 | Method for preparing modified current collector aluminum foil at room temperature |
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Application publication date: 20190226 |