CN105895922B - A kind of preparation method of conductive coating aluminium foil - Google Patents
A kind of preparation method of conductive coating aluminium foil Download PDFInfo
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- CN105895922B CN105895922B CN201610317607.1A CN201610317607A CN105895922B CN 105895922 B CN105895922 B CN 105895922B CN 201610317607 A CN201610317607 A CN 201610317607A CN 105895922 B CN105895922 B CN 105895922B
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- aluminium foil
- coated
- conductive
- conductive carbon
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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
-
- 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
-
- 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
-
- 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 provides a kind of preparation methods of conductive coating aluminium foil, including are cleaned to aluminium foil, the high temperature anneal；It is adhesive coated at 1 ~ 2 μm that a layer thickness is coated on one side at it；Conductive carbon coating of a layer thickness at 1 ~ 4 μm is coated again on adhesive coated surface；It is put into baking oven to dry it, makes conductive carbon coating and adhesive coated is cured cross-linking reaction；Step (2)-(4) are repeated, adhesive coated and conductive carbon coating is successively coated in the another side of aluminium foil, after curing oven, the two-sided conductive coating aluminium foil for being coated with carbon coating can be obtained.The surface tension of conductive coating aluminium foil prepared by the present invention is big, conducts electricity very well, and can effectively promote the electrical property and consistency of manufactured finished battery.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to a kind of system of lithium ion battery conductive coating aluminium foil
Preparation Method.
Background technique
The energy and environmental problem increasingly aggravated in recent years, so that lithium ion battery is extensive as a source of power on automobile
Ground is applied, this to the heat production under the cycle life of lithium ion battery, dynamic condition and in groups after the consistency of battery pack mention
Higher requirement out.
It is directly to be coated on aluminum foil current collector surface, collector that the method for preparing pole piece traditional at present, which is by active material,
The electronics that electrochemical reaction generates is collected by the physical contact with active material and is exported to external circuit, to realize chemistry
It can be mutually converted with electric energy.The defect that this mode is primarily present has: 1) being a point between active material and rigid current collector
Contact, interface impedance is big, and the DCR of battery is big under dynamic condition, i.e. battery heat production is big, and cycle life is limited；2) binder is viscous
Knotting strength is limited, and during continuous charge and discharge, easily expand between collector and active material causes to fall off battery, causes
The internal resistance of battery sharply increases, and influences the cycle life and security performance of battery.
Therefore, the interface impedance between collector and active material is reduced, improving adhesion strength between the two is to be promoted
Battery cycle life, security performance, the important means of heat production problem and consistency.
Summary of the invention
The present invention provides a kind of preparation method of lithium ion battery positive conductive coated aluminum foil, solves lithium ion battery
Adhesive capacity between middle active material and collector can effectively improve battery in the cycle life and cyclic process of battery
The variation of impedance.
A kind of preparation method of conductive coating aluminium foil, includes the following steps:
(1) aluminium foil is cleaned, the high temperature anneal；
(2) the coated machine paint roller of one side through step (1) treated aluminium foil is coated into bonding of a layer thickness at 1 ~ 2 μm
Agent coating；
(3) another paint roller is continued through, coats conductive carbon of a layer thickness at 1 ~ 4 μm again on adhesive coated surface
Coating；
(4) it is put into baking oven to dry it, makes conductive carbon coating and adhesive coated is cured cross-linking reaction；
(5) step (2)-(4) are repeated, adhesive coated and conductive carbon coating are successively coated in the another side of aluminium foil, through drying
After case drying is cured cross-linking reaction, the two-sided conductive coating aluminium foil for being coated with carbon coating can be obtained.
Further scheme, step (1) aluminium foil is first to carry out pickling, alkali cleaning, washing respectively, to remove foil surface
Impurity；The high temperature anneal is carried out at a temperature of being placed in 400 ~ 600 DEG C again after draining, and makes to form hole uniformly, fine and close on aluminium foil.
To make it is adhesive coated can more evenly, closer be attached on aluminium foil.
Further scheme, it is described it is adhesive coated formed for curing reaction type conducting resinl and cure-crosslinking agent, wherein solidifying
The content of crosslinking agent is 0.3-0.8wt%.
Further scheme, the curing reaction type conducting resinl include epoxide resin conductive adhesive, phenolic resin conducting resinl and gather
Urethane conducting resinl.
Further scheme, in the step (3) conductive carbon coating be granular conductive carbon black and sheets of conductive graphite or
Particulate conductive carbon black and graphene mix in mass ratio for 2:1.
Further scheme, the baking oven in the step (4) are UV uv equipment.
The present invention, which reaches 140-200 DEG C of baking oven or UV uv equipment by temperature, applies conductive carbon coating and binder
Curing reaction type conducting resinl is cured cross-linking reaction in layer, guarantee conductive carbon coating can more evenly, closer be attached to
On aluminium foil, conductive coating aluminium foil is made.
Conductivity type adhesive abbreviation conducting resinl, be one kind can effectively be glued a variety of materials but also
Adhesive.By curing process feature, conducting resinl can be divided into curing reaction type, heat molten type, high temperature sintering type, solvent type and pressure-sensitive
Type conducting resinl.
Due to the preparation method of traditional conductive carbon coating be by by aqueous slurry be coated in sided corona treatment after aluminium foil
On, the adhesive ability between aqueous coating slurry and aluminium foil is limited, and conductive coating being unevenly distributed on foil, influences to make
At battery electrical property and consistency.And the present invention is obviously improved by realizing the crosslinking curing between two kinds of binders
Adhesive ability of the conductive carbon coating on aluminium foil, while can have by carrying out pickling, alkali cleaning and the high temperature anneal to aluminium foil
The guaranteeing of effect forms micropore uniformly, fine and close on aluminium foil, is conducive to dispersion of the slurry on aluminium foil and spreads out.Present invention preparation
Conductive coating aluminium foil surface tension it is big, conduct electricity very well, and the electrical property of finished battery made of can effectively being promoted
And consistency.
Specific embodiment
Embodiment 1:
A kind of preparation method of conductive coating aluminium foil, includes the following steps:
(1) pickling, alkali cleaning, washing are carried out, respectively first to remove the impurity on foil surface；400 DEG C of temperature are placed in after draining again
Degree is lower to carry out the high temperature anneal, makes to form hole uniformly, fine and close on aluminium foil；
(2) the coated machine paint roller of one side through step (1) treated aluminium foil is coated into the binder that a layer thickness is 1 μm
Coating；It is described it is adhesive coated formed for conductive polyurethane glue and cure-crosslinking agent benzoyl peroxide, wherein cure-crosslinking agent
The content of benzoyl peroxide is 0.5wt%；
(3) another paint roller is continued through, a layer thickness is coated again on adhesive coated surface and is applied in 1 μm of conductive carbon
Layer；Conductive carbon coating is mixed in mass ratio for 2:1 by granular conductive carbon black and sheets of conductive graphite；
(4) it is put into 180 DEG C of baking oven to dry it, is crosslinked conductive carbon coating and adhesive coated be cured instead
It answers；
(5) step (2)-(4) are repeated, adhesive coated and conductive carbon coating are successively coated in the another side of aluminium foil, through drying
After case drying is cured cross-linking reaction, the two-sided conductive coating aluminium foil for being coated with carbon coating can be obtained.
Embodiment 2:
A kind of preparation method of conductive coating aluminium foil, includes the following steps:
(1) pickling, alkali cleaning, washing are carried out, respectively first to remove the impurity on foil surface；600 DEG C of temperature are placed in after draining again
Degree is lower to carry out the high temperature anneal, makes to form hole uniformly, fine and close on aluminium foil；
(2) the coated machine paint roller of one side through step (1) treated aluminium foil is coated into the binder that a layer thickness is 2 μm
Coating；It is described it is adhesive coated formed for epoxide resin conductive adhesive and cure-crosslinking agent di-isopropylbenzene hydroperoxide, wherein solidifying
The content of crosslinking agent di-isopropylbenzene hydroperoxide is 0.3wt%；
(3) another paint roller is continued through, a layer thickness is coated again on adhesive coated surface and is applied in 4 μm of conductive carbon
Layer；Conductive carbon coating is mixed in mass ratio for 2:1 by granular conductive carbon black and graphene；
(4) it is put into UV uv equipment to dry it, makes conductive carbon coating and adhesive coated is cured crosslinking
Reaction；
(5) step (2)-(4) are repeated, adhesive coated and conductive carbon coating are successively coated in the another side of aluminium foil, through UV
After uv equipment drying is cured cross-linking reaction, the two-sided conductive coating aluminium foil for being coated with carbon coating can be obtained.
Comparative example:
It is chosen at widely used routine aluminium foil in lithium ion battery and first carries out sided corona treatment, conventionally in aluminium foil
Surface coats one layer of conductive coating (granular conductive carbon black and sheets of conductive graphite mix in mass ratio for 2:1), is made
Conductive coating aluminium foil.
Battery is made as collector in conductive coating aluminium foil prepared by embodiment 1 and comparative example and carries out dependence test,
Detection method is the examination criteria of this field routine.Pole piece peel strength made by aluminium foil made of the present invention as the result is shown
8% is promoted compared with comparative example, pole piece resistivity declines 5%, and the consistency of pole piece conductivity is obviously improved.In terms of battery, the present invention
Than conventional reduction by 3%, the cycle life of battery promotes 10%, and is being circulated throughout for the internal resistance of battery made of manufactured conductive aluminum foil
The internal resistance amplification of battery obviously decreases in journey.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (6)
1. a kind of preparation method of conductive coating aluminium foil, characterized by the following steps:
(1) aluminium foil is cleaned, the high temperature anneal；
(2) the coated machine paint roller of one side through step (1) treated aluminium foil a layer thickness is coated to apply in 1 ~ 2 μm of binder
Layer；
(3) another paint roller is continued through, a layer thickness is coated again on adhesive coated surface and is applied in 1 ~ 4 μm of conductive carbon
Layer；
(4) it is put into baking oven to dry it, makes conductive carbon coating and adhesive coated is cured cross-linking reaction；
(5) step (2)-(4) are repeated, adhesive coated and conductive carbon coating is successively coated in the another side of aluminium foil, is dried through baking oven
After the raw curing cross-linking reaction of drying hair, the two-sided conductive coating aluminium foil for being coated with carbon coating can be obtained.
2. preparation method according to claim 1, it is characterised in that: step (1) aluminium foil is first to carry out acid respectively
It washes, alkali cleaning, washing, to remove the impurity on foil surface；It is carried out at high annealing at a temperature of being placed in 400 ~ 600 DEG C again after draining
Reason makes to form hole uniformly, fine and close on aluminium foil.
3. preparation method according to claim 1, it is characterised in that: described adhesive coated for curing reaction type conduction
Glue and cure-crosslinking agent composition, wherein the content of cure-crosslinking agent is 0.3-0.8wt%.
4. preparation method according to claim 3, it is characterised in that: the curing reaction type conducting resinl includes asphalt mixtures modified by epoxy resin
Rouge conducting resinl, phenolic resin conducting resinl and conductive polyurethane glue.
5. preparation method according to claim 1, it is characterised in that: conductive carbon coating is particle in the step (3)
Shape conductive carbon black and sheets of conductive graphite or granular conductive carbon black and graphene mix in mass ratio for 2:1.
6. preparation method according to claim 1, it is characterised in that: the baking oven in the step (4) is UV photocuring
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN105895922A CN105895922A (en) | 2016-08-24 |
| CN105895922B true 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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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208336379U (en) * | 2017-12-29 | 2019-01-04 | 上海其鸿新材料科技有限公司 | A kind of lithium battery collector |
| 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 |
| 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 |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403263B1 (en) * | 2000-09-20 | 2002-06-11 | Moltech Corporation | Cathode current collector for electrochemical cells |
| CN101884125B (en) * | 2007-10-26 | 2013-11-20 | 赛昂能源有限公司 | Primer for battery electrode |
| WO2012108212A1 (en) * | 2011-02-10 | 2012-08-16 | 昭和電工株式会社 | Current collector |
| CN105514349B (en) * | 2014-09-24 | 2018-04-20 | 比亚迪股份有限公司 | Based lithium-ion battery positive plate and preparation method and lithium ion battery |
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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. |
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