CN107546391A - poly-dopamine and graphene composite coating - Google Patents
poly-dopamine and graphene composite coating Download PDFInfo
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- CN107546391A CN107546391A CN201710572682.7A CN201710572682A CN107546391A CN 107546391 A CN107546391 A CN 107546391A CN 201710572682 A CN201710572682 A CN 201710572682A CN 107546391 A CN107546391 A CN 107546391A
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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 present invention relates to a kind of poly-dopamine and the composite coating of graphene, it is characterised in that specific coating step is as follows：（1）DOPA amine monomers are dissolved in HCl solvents, it is 1 ~ 1000mmol L to be configured to dopamine concentration‑1Alkaline solution；（2）Graphene uniform is scattered in a solvent, and shared volumn concentration ratio is 0.001% ~ 99.99% to graphene in a solvent；（3）By step（1）And step（2）The solution mixing of preparation, battery afflux liquid or pole piece is placed in mixed solution, static placement 2h ~ 48h.After cleaning, dried under 80 DEG C ~ 120 DEG C temperature conditionss, the composite coating of gained poly-dopamine and graphene.It is directed under the conditions of high current charge-discharge, the problem of big calorimetric can not scatter and disappear quickly caused by inside battery, utilize the good thermal conduction characteristic of poly-dopamine and graphene, it is graphene coated with the composite coating of poly-dopamine in collection liquid surface, further improve the bond strength of collector and active material, meanwhile have the function that to reduce internal temperature of battery.
Description
Technical field
The present invention relates to a kind of poly-dopamine and the composite coating of graphene, has and improves lug, collector heat sinking function,
Belong to field of new energy technologies, be mainly used in the new energy energy storage list such as lithium ion battery, metal-air battery, ultracapacitor
First field.
Background technology
Motor, battery, it is automatically controlled be new-energy automobile development three big core components.Wherein, battery is even more to restrict new energy
The core important document of development of automobile.At present, people's pursuit is more energy density, the life-span of battery, to the demand of electric automobile
It is more course continuation mileage and low temperature use demand.But current battery is also there is certain safety problem, such as burning or even
The problem of blast.Wherein, heat dispersion of the battery in the case of high magnification, and the technical problem of urgent need to resolve how are ensured.
Patent CN103337676B, patent CN103474712B are using cooling water filter unit from flow cooling device, close
Water shutoff cold drawing reduces the heat of battery.Patent CN101640286B uses a kind of new-type lug, by increasing current lead-through face
Product reduces the purpose of cell heat under the conditions of high-multiplying power discharge to reach.Patent CN102593503B sets up gold by inside battery
Category conduit is designed to reduce the purpose of the heat of inside battery.Usually, be all by outside batteries apply water cooling plant and
Reach the purpose of radiating by changing the structure design of battery.
Here, we reach reduction battery by way of applying coating by changing the thinking of inside battery design
The purpose of heat.A kind of present practical technology is one layer of activity of painting on the copper foil of affluxion body or aluminium foil of lithium ion battery
Charcoal material, the bond strength of collector and active material is improved, but in cell fabrication processes, the de- of utter misery material usually occur
Fall problem.This patent, by physical-chemical reaction process, it is more with gathering to make graphene from this thinking in collection liquid surface
The composite coating of bar amine, the bond strength of collector and active material is further improved, meanwhile, reach reduction internal temperature of battery
Effect.
Poly-dopamine is the main active of the stickum of shell biology exocuticle secretion, according to document [Haeshin
Lee etc. , NATURE. 2007, 448(19) : 338-342; Haeshin Lee etc. , SCIENCE, 2007,
318:426-430J] to report, dopamine can significantly be modified the surface characteristic of object, and viscous between dopamine modified layer and matrix
Knot power is extremely strong, and in recent years, its application in field of surface modification is a lot of [CN 101864670B, CN102061479A], but
It is that forming composite coating with graphene is used to improve battery afflux liquid performance, in terms of further improving inside battery heat dispersion
Application have not been reported.
On the patent of graphene and poly-dopamine class have focused largely on it is several in terms of.1. changed by poly-dopamine
The characteristic of kind graphene, or the method for preparing graphite alkenes material.As CN105153381A disclose it is a kind of poly- more by introducing
The method of bar amine substance modification graphene, by it is covalent modified and it is non-covalent it is modified combine, before ensureing that graphene-structured is complete
Put the structural stability for improving modified product.CN104229781A and CN104229781B discloses one kind and prepares high itrogen content of getter with nitrogen doped
The method of nitrogen-doped graphene.2. for the research of dopamine context of detection, such as a kind of detection dopamines of CN104267085A
Modified electrode and its preparation method and application, CN103604849A and CN103604849B be a kind of to detect dopamine, anti-bad simultaneously
The electrochemical sensor of hematic acid and uric acid.3. by the active group of dopamine, the grafting of graphene and other materials is realized.Such as
A kind of methods of surface of graphene oxide graft modification aramid fiber of CN104047160B, CN104927302A one kind is by graphite
Epoxy resin composite material of alkene toughness reinforcing and preparation method thereof, a kind of nanometer composite proton exchange membranes of CN103715438A and its
Preparation method and application.
The content of the invention
It is an object of the invention to provide a kind of poly-dopamine and the composite coating of graphene, and it is directed in large current density
Under the conditions of electricity, the problem of big calorimetric can not scatter and disappear quickly caused by inside battery, led using poly-dopamine and graphene are good
Thermal characteristics, it is graphene coated with the composite coating of poly-dopamine in collection liquid surface, further improve collector and active material
Bond strength, meanwhile, have the function that reduce internal temperature of battery.
The technical scheme is that be achieved in that：A kind of composite coating of poly-dopamine and graphene, it is characterised in that
Specific coating step is as follows：（1）DOPA amine monomers are dissolved in HCl solvents, be configured to dopamine concentration for 1 ~
1000mmol•••L-1Alkaline solution, solution ph forms polymer between 7.5 ~ 11；（2）Graphene uniform is disperseed
In a solvent, wherein solvent is less than comprising one or more, wherein CMC weight/mass percentage compositions such as NMP, CMC, PVDF, DMF, DMA
0.05%, DMF volume percent content are less than 50%, DMA volume percent contents 50%；Graphene shared volume in a solvent
Percentage composition ratio is 0.001% ~ 99.99%；（3）By step（1）And step（2）The solution mixing of preparation, by battery afflux liquid
Or pole piece is placed in mixed solution, static placement 2h ~ 48h.After cleaning, dried under 80 DEG C ~ 120 DEG C temperature conditionss, gained gathers
The composite coating of dopamine and graphene.
The step（1）And step（2）The preparation of solution can step completion.Wrapped in poly-dopamine and graphene composite coating
Containing poly-dopamine, graphene, wherein described graphene includes the graphene one or several kinds containing conductive group.
Described poly-dopamine is mixture, wherein including DOPA amine monomers, catechol derivatives and its polymer；It is multiple
Close graphene weight/mass percentage composition in coating and be more than or equal to 20%, Dopaminergics content of material is the 1/100 ~ 1 of graphene content
Times.
The positive effect of the present invention is that the composite coating of the graphene and poly-dopamine acts on battery afflux liquid, a side
Face, be advantageous to improve and solve the problems, such as that cell active materials come off from collector；On the other hand, the composite coating is advantageous to
Improve battery under the conditions of high current charge-discharge, internal temperature of battery is higher, and inside battery heat does not allow the problem of easy to lose, has
Effect reduces by 3 DEG C ~ 10 DEG C of battery surface temperature.
Brief description of the drawings
Fig. 1 poly-dopamines and graphene composite coating structure schematic diagram.
The electrochemical window of Fig. 2 lithium ion batteries.
Embodiment
Embodiments of the present invention are described below in conjunction with the accompanying drawings, described embodiment is the right to the present invention
It is required that specific descriptions, claim includes but is not limited to described embodiment content.
Embodiment 1
50g DOPA amine monomers are dissolved in HCl solvents as shown in Figure 1, it is 1mmol L to be configured to dopamine concentration-1Alkalescence
Solution, solution pH value are 7.5；50g graphene uniforms are dispersed in NMP and CMC in the mixed solvent, wherein NMP and CMC's
Volume ratio is 100:1, shared percent by volume is 0.1% to graphene in a solvent；By above two solution 1:1 mixing, by lithium
The copper foil of affluxion body and aluminium foil of ion battery are respectively placed in mixed solution, static placement 48h.After cleaning, 120 DEG C of temperature conditionss
Under, dry 1h, the composite coating of gained poly-dopamine and graphene.
Embodiment 2
50g DOPA amine monomers are dissolved in HCl solvents, it is 100mmol L to be configured to dopamine concentration-1Alkaline solution, it is molten
Liquid pH values are 11；70g graphene uniforms are dispersed in the in the mixed solvent containing NMP, PVDF and DMF, wherein NMP, DMF and
PVDF volume ratio is 70: 30:2, shared percent by volume is 5% to graphene in a solvent；By above two solution 1:2
Mixing, the copper foil of affluxion body of lithium ion battery and aluminium foil is respectively placed in mixed solution, static placement 24h.After cleaning, 80 DEG C
Under temperature conditionss, vacuum drying 1h, the composite coating of gained poly-dopamine and graphene.It is visually visible, on copper foil and aluminium foil
One layer of black composite coating of even deposition, the um of coating layer thickness 0.5.The cated collector of painting of preparation is used as positive pole, lithium piece is made
For negative material, C2032 button cells are assembled into as barrier film using PP materials, electrochemical window test are carried out, such as Fig. 2 institutes
Show.It can be seen that the battery system containing graphene and poly-dopamine coating, still with electrochemical stability.
Embodiment 3
50g DOPA amine monomers are dissolved in HCl solvents, it is 70mmol L to be configured to dopamine concentration-1Alkaline solution, it is molten
Liquid pH value is 10, and the CMC of 1% mass percent is then added in above-mentioned solvent, forms homogeneous solution.Under ul-trasonic irradiation
By percent by volume be 1.5% graphene dispersion into above-mentioned solution.It is molten that the nickel set fluid of zinc-air battery is immersed in mixing
In liquid, 24h is stood.Cleaning foaming nickel set fluid, vacuum drying 2h under the conditions of 100 DEG C, naked eyes are visible, and one layer is deposited on collector
Light/dark balance coating, it is homogeneous.
Claims (3)
1. the composite coating of a kind of poly-dopamine and graphene, it is characterised in that specific coating step is as follows：（1）By dopamine
Monomer is dissolved in HCl solvents, and it is 1 ~ 1000mmol L to be configured to dopamine concentration-1Alkaline solution, solution ph is between 7.5
Polymer is formed between ~ 11；（2）Graphene uniform is scattered in a solvent, wherein solvent include NMP, CMC, PVDF, DMF,
The one or more such as DMA, wherein CMC weight/mass percentage compositions are less than 50%, DMA volumes less than 0.05%, DMF volume percent contents
Degree 50%；Shared volumn concentration ratio is 0.001% ~ 99.99% to graphene in a solvent；（3）By step
（1）And step（2）The solution mixing of preparation, battery afflux liquid or pole piece is placed in mixed solution, static placement 2h ~ 48h;
After cleaning, dried under 80 DEG C ~ 120 DEG C temperature conditionss, the composite coating of gained poly-dopamine and graphene.
A kind of 2. composite coating of the poly-dopamine and graphene according to right 1, it is characterised in that described step（1）With
Step（2）The step of preparation one of solution completes poly-dopamine and graphene composite coating, and poly-dopamine, graphene are included in coating,
Wherein it is one or several kinds of to include the graphene containing conductive group for graphene.
A kind of 3. composite coating of the poly-dopamine and graphene according to right 1, it is characterised in that described poly-dopamine
It is mixture, wherein including DOPA amine monomers, catechol derivatives and its polymer；Graphene quality percentage in composite coating
Content is more than or equal to 20%, and Dopaminergics content of material is 1/100 ~ 1 times of graphene content.
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| CN201710572682.7A CN107546391B (en) | 2017-07-14 | 2017-07-14 | Polydopamine and graphene composite coating |
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Cited By (6)
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| CN108470598A (en) * | 2018-04-06 | 2018-08-31 | 天津工业大学 | Flexible transparent conductive film and preparation method thereof |
| CN110518253A (en) * | 2019-08-30 | 2019-11-29 | 陕西煤业化工技术研究院有限责任公司 | A kind of cathode of lithium battery collector and preparation method thereof |
| CN114410221A (en) * | 2022-01-18 | 2022-04-29 | 沈阳化工大学 | Preparation method of low-temperature curing environment-friendly water-based chromium-free zinc-aluminum coating |
| KR20220087757A (en) * | 2020-12-18 | 2022-06-27 | 주식회사 포스코 | Steel sheet and method for manufacturing the same |
| CN114796601A (en) * | 2022-05-20 | 2022-07-29 | 武汉理工大学 | Composite piezoelectric film for inducing bone regeneration and preparation method and application thereof |
| CN116836495A (en) * | 2023-04-11 | 2023-10-03 | 湖北中一科技股份有限公司 | Composite conductive film and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470598A (en) * | 2018-04-06 | 2018-08-31 | 天津工业大学 | Flexible transparent conductive film and preparation method thereof |
| CN110518253A (en) * | 2019-08-30 | 2019-11-29 | 陕西煤业化工技术研究院有限责任公司 | A kind of cathode of lithium battery collector and preparation method thereof |
| KR20220087757A (en) * | 2020-12-18 | 2022-06-27 | 주식회사 포스코 | Steel sheet and method for manufacturing the same |
| CN114410221A (en) * | 2022-01-18 | 2022-04-29 | 沈阳化工大学 | Preparation method of low-temperature curing environment-friendly water-based chromium-free zinc-aluminum coating |
| CN114410221B (en) * | 2022-01-18 | 2022-09-30 | 沈阳化工大学 | Preparation method of low-temperature curing environment-friendly water-based chromium-free zinc-aluminum coating |
| CN114796601A (en) * | 2022-05-20 | 2022-07-29 | 武汉理工大学 | Composite piezoelectric film for inducing bone regeneration and preparation method and application thereof |
| CN116836495A (en) * | 2023-04-11 | 2023-10-03 | 湖北中一科技股份有限公司 | Composite conductive film and preparation method thereof |
| CN116836495B (en) * | 2023-04-11 | 2024-02-06 | 湖北中一科技股份有限公司 | Composite conductive film and preparation method thereof |
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