CN105895922A - Fabrication method of conductive coating aluminum foil - Google Patents
Fabrication method of conductive coating aluminum foil Download PDFInfo
- Publication number
- CN105895922A CN105895922A CN201610317607.1A CN201610317607A CN105895922A CN 105895922 A CN105895922 A CN 105895922A CN 201610317607 A CN201610317607 A CN 201610317607A CN 105895922 A CN105895922 A CN 105895922A
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- conductive
- aluminium foil
- aluminum foil
- conductive carbon
- carbon coating
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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
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
-
- 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
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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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- 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 invention provides a fabrication method of a conductive coating aluminum foil. The fabrication method comprises the following steps of (1) washing the aluminum foil, and carrying out high-temperature annealing processing; (2) applying a binding agent coating layer with the thickness of 1-2 micrometers onto one surface of the aluminum foil; (3) applying a conductive carbon coating layer with the thickness of 1-4 micrometers onto the surface of the binding agent coating layer; (4) placing the aluminum foil in a drying oven for drying so that the curing cross-linking reaction is generated between the conductive carbon coating layer and the binding agent coating layer; and (5), repeating the steps (2) to (4), sequentially applying the binding agent coating layer and the conductive carbon coating layer on the other surface of the aluminum foil, and curing the aluminum foil by the drying oven to obtain the conductive coating aluminum foil whose two surfaces are coated with the carbon coating layers. The conductive coating aluminum foil fabricated according to the method is high in surface tension and good in conductivity, and the electrical performance and the consistency of the fabricated battery finished product can be effectively improved.
Description
Technical field
The present invention relates to technical field of lithium ion, be specifically related to the preparation method of a kind of lithium ion battery conductive coating aluminium foil.
Background technology
The energy the most day by day increased the weight of and environmental problem so that lithium ion battery is widely available application as power resources on automobile, this to the heat production under the cycle life of lithium ion battery, dynamic condition and in groups after the concordance of set of cells higher requirement is proposed.
The most traditional method preparing pole piece is to be directly to be coated on aluminum foil current collector surface by active material, collector is by collecting the electronics that electrochemical reaction produces with the physical contact of active material and deriving to external circuit, thus realizes the mutual conversion of chemical energy and electric energy.The defect that this mode is primarily present has: be 1) point cantact between active material and rigid current collector, and interface impedance is big, and under dynamic condition, the DCR of battery is big, i.e. battery heat production is big, and cycle life is limited；2) adhesion strength of binding agent is limited, and battery, during continuous discharge and recharge, easily expands between collector and active substance and causes coming off, and causes the internal resistance of battery drastically to strengthen, and affects cycle life and the security performance of battery.
Therefore, reduce the interface impedance between collector and active material, improve adhesion strength therebetween and be an up battery cycle life, security performance, heat production problem and conforming important means.
Summary of the invention
The present invention provides the preparation method of a kind of lithium ion battery positive conductive coated aluminum foil, solves the adhesive capacity between active substance and collector in lithium ion battery, can effectively improve the change of battery impedance in the cycle life of battery and cyclic process.
The preparation method of a kind of conductive coating aluminium foil, comprises the steps:
(1) aluminium foil is carried out, the high temperature anneal；
(2) the one side coated machine paint roller of aluminium foil after step (1) processes is coated adhesive coated in 1 ~ 2 μm of a layer thickness；
(3) continue through another paint roller, repaste the last layer thickness conductive carbon coating in 1 ~ 4 μm on adhesive coated surface；
(4) put into baking oven it is dried, make conductive carbon coating and adhesive coated generation curing cross-linking reaction；
(5) repeating step (2)-(4), the another side at aluminium foil coats adhesive coated and conductive carbon coating successively, after curing oven, the two-sided conductive coating aluminium foil scribbling carbon coating.
Scheme further, described step (1) aluminium foil is to carry out pickling, alkali cleaning, washing the most respectively, to remove the impurity on foil surface；Carry out the high temperature anneal at a temperature of being placed in 400 ~ 600 DEG C again after draining, make on aluminium foil, to form uniform, fine and close hole.Can be attached on aluminium foil evenly, more closely so that adhesive coated.
Further scheme, described adhesive coated forms for curing reaction type conducting resinl and cure-crosslinking agent, and wherein the content of cure-crosslinking agent is 0.3-0.8wt%.
Scheme further, described curing reaction type conducting resinl includes epoxide resin conductive adhesive, phenolic resin conducting resinl and conductive polyurethane glue.
Further scheme, in described step (3), conductive carbon coating is granular conductive carbon black and sheets of conductive graphite or granular conductive carbon black and Graphene mixes for 2:1 in mass ratio.
Scheme further, the baking oven in described step (4) is UV uv equipment.
The present invention reaches the baking oven of 140-200 DEG C by temperature or UV uv equipment makes conductive carbon coating and adhesive coated middle curing reaction type conducting resinl generation curing cross-linking reaction, ensure that conductive carbon coating can be attached on aluminium foil evenly, more closely, make conductive coating aluminium foil.
Conductivity type adhesive is called for short conducting resinl, is that one can glued joint various material effectively, has again the adhesive of electric conductivity.By curing process feature, conducting resinl can be divided into curing reaction type, heat molten type, high temperature sintering type, solvent-borne type and pressure sensitive conducting resinl.
Owing to the preparation method of traditional conductive carbon coating is by being coated in by water paste on the aluminium foil after sided corona treatment, adhesive ability between aqueous coating slurry and aluminium foil is limited, and the skewness that conductive coating is on foil, the electrical property of the battery that impact is made and concordance.And the present invention is by realizing the crosslinking curing between two kinds of binding agents, it is obviously improved conductive carbon coating adhesive ability on aluminium foil, can effectively ensure on aluminium foil, form the dispersion on aluminium foil of uniform, fine and close micropore, beneficially slurry and spread out by aluminium foil carries out pickling, alkali cleaning and the high temperature anneal simultaneously.The surface tension of conductive coating aluminium foil prepared by the present invention is big, conduct electricity very well, it is possible to effectively promote electrical property and the concordance of the resultant battery made.
Detailed description of the invention
Embodiment 1:
The preparation method of a kind of conductive coating aluminium foil, comprises the steps:
(1) pickling, alkali cleaning, washing are carried out the most respectively, to remove the impurity on foil surface；Carry out the high temperature anneal at a temperature of being placed in 400 DEG C again after draining, make on aluminium foil, to form uniform, fine and close hole；
(2) the one side coated machine paint roller of the aluminium foil after step (1) processes being coated a layer thickness is the adhesive coated of 1 μm；Described adhesive coated forming for conductive polyurethane glue and cure-crosslinking agent benzoyl peroxide, wherein the content of cure-crosslinking agent benzoyl peroxide is 0.5wt%；
(3) continue through another paint roller, repaste the last layer thickness conductive carbon coating in 1 μm on adhesive coated surface；Conductive carbon coating is to be mixed for 2:1 in mass ratio by granular conductive carbon black and sheets of conductive graphite；
(4) it is dried by the baking oven putting into 180 DEG C, makes conductive carbon coating and adhesive coated generation curing cross-linking reaction；
(5) repeating step (2)-(4), the another side at aluminium foil coats adhesive coated and conductive carbon coating successively, after curing oven, the two-sided conductive coating aluminium foil scribbling carbon coating.
Embodiment 2:
The preparation method of a kind of conductive coating aluminium foil, comprises the steps:
(1) pickling, alkali cleaning, washing are carried out the most respectively, to remove the impurity on foil surface；Carry out the high temperature anneal at a temperature of being placed in 600 DEG C again after draining, make on aluminium foil, to form uniform, fine and close hole；
(2) the one side coated machine paint roller of the aluminium foil after step (1) processes being coated a layer thickness is the adhesive coated of 2 μm；Described adhesive coated forming for epoxide resin conductive adhesive and cure-crosslinking agent di-isopropylbenzene hydroperoxide, wherein the content of cure-crosslinking agent di-isopropylbenzene hydroperoxide is 0.3wt%；
(3) continue through another paint roller, repaste the last layer thickness conductive carbon coating in 4 μm on adhesive coated surface；Conductive carbon coating is to be mixed for 2:1 in mass ratio by granular conductive carbon black and Graphene；
(4) put into UV uv equipment it is dried, make conductive carbon coating and adhesive coated generation curing cross-linking reaction；
(5) repeating step (2)-(4), the another side at aluminium foil coats adhesive coated and conductive carbon coating successively, after the solidification of UV-light cured equipment, the two-sided conductive coating aluminium foil scribbling carbon coating.
Comparative example:
It is chosen at widely used conventional aluminium foil in lithium ion battery and first carries out sided corona treatment, conventionally coat one layer of conductive coating (granular conductive carbon black and sheets of conductive graphite mix for 2:1 in mass ratio) at aluminium foil surface, prepare conductive coating aluminium foil.
Conductive coating aluminium foil embodiment 1 and comparative example prepared is made battery as collector and is carried out dependence test, and its detection method is all the examination criteria that this area is conventional.The pole piece peel strength relatively comparative example made by aluminium foil that the result display present invention makes promotes 8%, and pole piece resistivity declines 5%, and the concordance of pole piece conductivity is obviously improved.Battery aspect, the internal resistance of the battery that the conductive aluminum foil that the present invention makes is made is than conventional reduction by 3%, and the cycle life of battery promotes 10%, and the internal resistance amplification of battery substantially decreases in cyclic process.
Embodiment described above is only to be described the preferred embodiment of the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (6)
1. the preparation method of a conductive coating aluminium foil, it is characterised in that: comprise the steps:
(1) aluminium foil is carried out, the high temperature anneal；
(2) the one side coated machine paint roller of aluminium foil after step (1) processes is coated adhesive coated in 1 ~ 2 μm of a layer thickness；
(3) continue through another paint roller, repaste the last layer thickness conductive carbon coating in 1 ~ 4 μm on adhesive coated surface；
(4) put into baking oven it is dried, make conductive carbon coating and adhesive coated generation curing cross-linking reaction；
(5) repeating step (2)-(4), the another side at aluminium foil coats adhesive coated and conductive carbon coating successively, after curing oven, the two-sided conductive coating aluminium foil scribbling carbon coating.
2. according to the preparation method described in claim 1, it is characterised in that: described step (1) aluminium foil is to carry out pickling, alkali cleaning, washing the most respectively, to remove the impurity on foil surface；Carry out the high temperature anneal at a temperature of being placed in 400 ~ 600 DEG C again after draining, make on aluminium foil, to form uniform, fine and close hole.
3. according to the preparation method described in claim 1, it is characterised in that: described adhesive coated forming for curing reaction type conducting resinl and cure-crosslinking agent, wherein the content of cure-crosslinking agent is 0.3-0.8wt%.
4. according to the preparation method described in claim 3, it is characterised in that: described curing reaction type conducting resinl includes epoxide resin conductive adhesive, phenolic resin conducting resinl and conductive polyurethane glue.
5. according to the preparation method described in claim 1, it is characterised in that: in described step (3), conductive carbon coating is granular conductive carbon black and sheets of conductive graphite or granular conductive carbon black and Graphene mixes for 2:1 in mass ratio.
6. according to the preparation method described in claim 1, it is characterised in that: the baking oven in described step (4) is UV uv equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610317607.1A CN105895922B (en) | 2016-05-13 | 2016-05-13 | A kind of preparation method of conductive coating aluminium foil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610317607.1A CN105895922B (en) | 2016-05-13 | 2016-05-13 | A kind of preparation method of conductive coating aluminium foil |
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| Publication Number | Publication Date |
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| CN105895922A true CN105895922A (en) | 2016-08-24 |
| CN105895922B CN105895922B (en) | 2019-01-08 |
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| CN201610317607.1A Active CN105895922B (en) | 2016-05-13 | 2016-05-13 | A kind of preparation method of conductive coating aluminium foil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777307A (en) * | 2017-12-29 | 2018-11-09 | 上海其鸿新材料科技有限公司 | A kind of lithium battery collector conductive coating |
| CN111416100A (en) * | 2020-02-28 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of battery cell |
| CN113231278A (en) * | 2021-05-18 | 2021-08-10 | 南通宇华新材料科技有限公司 | Preparation method of carbon-coated foil for lithium ion battery |
| CN113285073A (en) * | 2021-05-18 | 2021-08-20 | 南通宇华新材料科技有限公司 | Carbon-coated foil with efficient conductive function |
| CN114005991A (en) * | 2021-10-26 | 2022-02-01 | 远景动力技术(江苏)有限公司 | Composite aluminum foil and preparation method and application thereof |
| CN114759191A (en) * | 2022-03-29 | 2022-07-15 | 佛山市中技烯米新材料有限公司 | Current collector metal foil, preparation method thereof and lithium battery current collector |
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| CN105514349A (en) * | 2014-09-24 | 2016-04-20 | 比亚迪股份有限公司 | Lithium ion battery cathode plate, preparation method, and lithium ion battery |
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| US6403263B1 (en) * | 2000-09-20 | 2002-06-11 | Moltech Corporation | Cathode current collector for electrochemical cells |
| CN101884125A (en) * | 2007-10-26 | 2010-11-10 | 赛昂能源有限公司 | Primer for battery electrode |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777307A (en) * | 2017-12-29 | 2018-11-09 | 上海其鸿新材料科技有限公司 | A kind of lithium battery collector conductive coating |
| CN111416100A (en) * | 2020-02-28 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of battery cell |
| CN113231278A (en) * | 2021-05-18 | 2021-08-10 | 南通宇华新材料科技有限公司 | Preparation method of carbon-coated foil for lithium ion battery |
| CN113285073A (en) * | 2021-05-18 | 2021-08-20 | 南通宇华新材料科技有限公司 | Carbon-coated foil with efficient conductive function |
| CN114005991A (en) * | 2021-10-26 | 2022-02-01 | 远景动力技术(江苏)有限公司 | Composite aluminum foil and preparation method and application thereof |
| CN114005991B (en) * | 2021-10-26 | 2023-10-27 | 远景动力技术(江苏)有限公司 | Composite aluminum foil and preparation method and application thereof |
| CN114759191A (en) * | 2022-03-29 | 2022-07-15 | 佛山市中技烯米新材料有限公司 | Current collector metal foil, preparation method thereof and lithium battery current collector |
| CN114759191B (en) * | 2022-03-29 | 2023-12-29 | 佛山市中技烯米新材料有限公司 | Current collector metal foil, preparation method thereof and lithium battery current collector |
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| CN105895922B (en) | 2019-01-08 |
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Effective date of registration: 20190701 Address after: 230012 Cailun Road and the northeast corner of Hushui Road, Xinzhan District, Hefei City, Anhui Province Patentee after: Hefei Guoxuan Precision Coating Material Co., Ltd. Address before: 230011 No. 599 Daihe Road, Xinzhan District, Hefei City, Anhui Province Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |