[go: up one dir, main page]

CN105895922B - Preparation method of conductive coating aluminum foil - Google Patents

Preparation method of conductive coating aluminum foil Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
coating
conductive
aluminum foil
preparation
conductive carbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610317607.1A
Other languages
Chinese (zh)
Other versions
CN105895922A (en
Inventor
陈萍
张江伟
李瑜
李慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Guoxuan Precision Coating Material Co ltd
Original Assignee
Gotion High Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gotion High Tech Co Ltd filed Critical Gotion High Tech Co Ltd
Priority to CN201610317607.1A priority Critical patent/CN105895922B/en
Publication of CN105895922A publication Critical patent/CN105895922A/en
Application granted granted Critical
Publication of CN105895922B publication Critical patent/CN105895922B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

The invention provides a preparation method of an aluminum foil with a conductive coating, which comprises the steps of cleaning the aluminum foil and carrying out high-temperature annealing treatment; coating a binder coating with the thickness of 1-2 μm on one surface of the substrate; coating a conductive carbon coating with the thickness of 1-4 mu m on the surface of the binder coating; drying the conductive carbon coating and the binder coating in a drying oven to enable the conductive carbon coating and the binder coating to generate a curing crosslinking reaction; and (5) repeating the steps (2) to (4), sequentially coating the other side of the aluminum foil with the binder coating and the conductive carbon coating, and curing in an oven to obtain the conductive coating aluminum foil with the carbon coatings coated on the two sides. The conductive coating aluminum foil prepared by the invention has large surface tension and good conductivity, and can effectively improve the electrical property and consistency of the finished battery.

Description

A kind of preparation method of conductive coating aluminium foil
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)

1.一种导电涂层铝箔的制备方法，其特征在于：包括如下步骤：1. a preparation method of conductive coating aluminum foil, is characterized in that: comprise the steps: （1）对铝箔进行清洗、高温退火处理；(1) Clean and anneal the aluminum foil at high temperature; （2）将经步骤（1）处理后的铝箔的一面经涂布机涂辊涂上一层厚度在1~2μm的粘结剂涂层；(2) Coat one side of the aluminum foil treated in step (1) with a layer of adhesive coating with a thickness of 1-2 μm through the coating roller of the coating machine; （3）继续通过另一个涂辊，在粘结剂涂层的表面再涂上一层厚度在1~4μm的导电碳涂层；(3) Continue to pass another coating roller, and coat a conductive carbon coating with a thickness of 1~4 μm on the surface of the adhesive coating; （4）放入烘箱对其进行烘干，使导电碳涂层和粘结剂涂层发生固化交联反应；(4) Put it in an oven to dry it, so that the conductive carbon coating and the binder coating undergo a curing and cross-linking reaction; （5）重复步骤（2）-（4），在铝箔的另一面依次涂上粘结剂涂层和导电碳涂层，经烘箱烘干发生固化交联反应后，即可得双面涂有碳涂层的导电涂层铝箔。(5) Repeat steps (2)-(4) to coat the other side of the aluminum foil with a binder coating and a conductive carbon coating in turn. Conductive coated aluminium foil with carbon coating. 2.根据权利要求1中所述的制备方法，其特征在于：所述步骤（1）铝箔是先分别进行酸洗、碱洗、水洗，以除去箔材表面的杂质；沥干后再置于400~600℃温度下进行高温退火处理，使铝箔上形成均匀、致密的孔隙。2. The preparation method according to claim 1, characterized in that: in the step (1), the aluminum foil is firstly subjected to acid washing, alkali washing and water washing to remove impurities on the surface of the foil; High temperature annealing treatment at 400~600℃ to form uniform and dense pores on the aluminum foil. 3.根据权利要求1中所述的制备方法，其特征在于：所述粘结剂涂层为固化反应型导电胶和固化交联剂组成，其中固化交联剂的含量为0.3-0.8wt%。3. The preparation method according to claim 1, wherein the adhesive coating is composed of a curing reactive conductive adhesive and a curing crosslinking agent, wherein the content of the curing crosslinking agent is 0.3-0.8wt% . 4.根据权利要求3中所述的制备方法，其特征在于：所述固化反应型导电胶包括环氧树脂导电胶、酚醛树脂导电胶和聚氨酯导电胶。4 . The preparation method according to claim 3 , wherein the curing reactive conductive adhesive comprises epoxy resin conductive adhesive, phenolic resin conductive adhesive and polyurethane conductive adhesive. 5 . 5.根据权利要求1中所述的制备方法，其特征在于：所述步骤（3）中导电碳涂层为颗粒状导电碳黑和片状导电石墨或颗粒状导电碳黑和石墨烯按质量比为2：1混合而成。5. The preparation method according to claim 1, characterized in that: in the step (3), the conductive carbon coating is granular conductive carbon black and flake conductive graphite or granular conductive carbon black and graphene by mass The ratio is 2:1 mixed. 6.根据权利要求1中所述的制备方法，其特征在于：所述步骤（4）中的烘箱为UV光固化设备。6 . The preparation method according to claim 1 , wherein the oven in the step (4) is UV light curing equipment. 7 .
CN201610317607.1A 2016-05-13 2016-05-13 Preparation method of conductive coating aluminum foil Active CN105895922B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610317607.1A CN105895922B (en) 2016-05-13 2016-05-13 Preparation method of conductive coating aluminum foil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610317607.1A CN105895922B (en) 2016-05-13 2016-05-13 Preparation method of conductive coating aluminum foil

Publications (2)

Publication Number Publication Date
CN105895922A CN105895922A (en) 2016-08-24
CN105895922B true CN105895922B (en) 2019-01-08

Family

ID=56716144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610317607.1A Active CN105895922B (en) 2016-05-13 2016-05-13 Preparation method of conductive coating aluminum foil

Country Status (1)

Country Link
CN (1) CN105895922B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208111572U (en) * 2017-12-29 2018-11-16 上海其鸿新材料科技有限公司 A kind of multifunctional 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 A kind of preparation method of electric core
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6403263B1 (en) * 2000-09-20 2002-06-11 Moltech Corporation Cathode current collector for electrochemical cells
KR101576694B1 (en) * 2007-10-26 2015-12-10 시온 파워 코퍼레이션 Primer for battery electrode
KR101472873B1 (en) * 2011-02-10 2014-12-15 쇼와 덴코 가부시키가이샤 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

Also Published As

Publication number Publication date
CN105895922A (en) 2016-08-24

Similar Documents

Publication Publication Date Title
CN105895922B (en) Preparation method of conductive coating aluminum foil
CN105261760B (en) Lithium ion battery aqueous positive-pole composite current collector, positive plate and preparation method thereof, lithium ion battery
JP5280313B2 (en) Lithium ion polymer battery comprising a polyolefin microporous membrane surface-modified with a hydrophilic polymer, a surface modification method thereof, and a surface-modified polyolefin microporous membrane as a separator
CN103165294B (en) Capacitor and method for manufacturing the same
KR101809189B1 (en) Metal foil, metal foil manufacturing method and electrode manufacturing method using the same
CN111599603B (en) MXene/ZnMnNi LDH van der Waals heterostructure and preparation method and application thereof
CN1839497A (en) Electrode and its preparation method
CN107978732A (en) Pole piece and battery
CN105470522B (en) Lithium ion battery positive electrode electrically-conducting paint and preparation method, based lithium-ion battery positive plate and preparation method and lithium ion battery
CN105895855A (en) Electrode coated with conductive carbon layer on surface and preparation method of electrode
CN110010824B (en) Polyolefin lithium ion battery diaphragm modification method
CN109742369A (en) Polymer-modified silicon-carbon composites and their applications
CN104466107A (en) Carbon fluoride composite positive electrode and preparation method thereof
CN107579256A (en) A kind of method of electrocondution slurry and its formation reticulated carbon thermal conductivity network collector
CN105336912A (en) Method for enhancing lithium ion battery current collector and active material adhesion
CN112850712A (en) Preparation method and application of MXene material
TW201427157A (en) Self-assembly carbon substrate cell negative electrode structure
CN116675983B (en) Preparation method and application of a fully organic polyetherimide-fluorene polyester blend energy storage composite material
CN108539280B (en) Composite current collector and preparation method thereof
CN113231278A (en) Preparation method of carbon-coated foil for lithium ion battery
CN112280383A (en) Porous titanium carbide MXene/reduced graphene oxide-based conductive ink and preparation method thereof
CN106384833A (en) Vanadium cell electrode assembly formed by modified carbon fiber felt and graphite current collector
CN107286757A (en) A kind of coating fluid, collector and preparation method thereof
CN108300004B (en) Graphene heat-conducting slurry and preparation method thereof
CN106450362A (en) A kind of vanadium battery electrode assembly

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

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: Gotion High-tech Co., Ltd.

TR01 Transfer of patent right