CN111703141A - Graphene composite flexible packaging film and lithium ion battery - Google Patents

Graphene composite flexible packaging film and lithium ion battery Download PDF

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Publication number
CN111703141A
CN111703141A CN202010537861.9A CN202010537861A CN111703141A CN 111703141 A CN111703141 A CN 111703141A CN 202010537861 A CN202010537861 A CN 202010537861A CN 111703141 A CN111703141 A CN 111703141A
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layer
graphene
polymer layer
flexible packaging
packaging film
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何大平
杨金龙
钱伟
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Wuhan Hanene Technology Co Ltd
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Wuhan Hanene Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • H01M10/6235—Power tools
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • 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

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  • General Chemical & Material Sciences (AREA)
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Abstract

A graphene composite flexible packaging film. The graphene composite flexible packaging film comprises a first polymer layer, a first adhesive layer, a graphene film layer, a second adhesive layer and a second polymer layer which are sequentially stacked, wherein the bottom surface of the graphene film layer is arranged opposite to the first polymer layer and is bonded with the first polymer layer through the first adhesive layer; the top surface of the graphene film layer is disposed opposite the second polymer layer and is bonded to the second polymer layer by a second adhesive layer. The graphene film provided by the invention can exist in a battery system very stably and resist electrolyte corrosion, and has excellent barrier property and corrosion resistance. In addition, the heat dissipation problem can be well solved, and the service life and the safety performance of the battery are improved. The invention also provides a lithium ion battery containing the graphene composite flexible packaging film.

Description

Graphene composite flexible packaging film and lithium ion battery
Technical Field
The invention relates to a lithium ion battery flexible packaging film material, in particular to a graphene composite flexible packaging film for a lithium ion battery. The invention also provides a lithium ion battery containing the graphene composite flexible packaging film.
Background
The soft package battery, especially the soft package lithium ion battery, has the advantages of large energy density, good safety performance, flexible appearance and the like, is widely applied to the fields of 3C digital products, electric tools and the like, and occupies a very important position in battery products. Most soft package lithium ion batteries on the market at present adopt the plastic-aluminum membrane to encapsulate, and the plastic-aluminum membrane quality is light, the leakproofness is good, and the deflection is big, can prevent the battery explosion, therefore the demand to the plastic-aluminum membrane is very big on the market at present.
In general, the electrolyte in the battery is highly corrosive, and particularly a soft packaging film with high stability is required under the extreme voltage conditions of the battery. And the aluminum belongs to active metal, when the inner layer of the aluminum-plastic film is damaged, the aluminum foil of the middle layer contacts the electrolyte in the battery to form a primary battery, the primary battery is easily corroded by the electrolyte to influence the barrier property of the primary battery, and the aluminum and the active material easily form aluminum alloy at a low potential. Such as aluminum lithium alloys in soft-pack lithium ion batteries, which deplete the active lithium material in the battery, resulting in a diminished, or even a failed, battery capacity.
On the other hand, the battery product has the phenomenon of generating heat and scalding in the processes of quick charging, quick discharging and long-time use, and the existing soft package aluminum-plastic film has high heat resistance but cannot effectively dissipate heat, so that the battery has certain potential safety hazard in the use process.
Disclosure of Invention
In view of the above, it is necessary to provide a graphene composite flexible packaging film with good heat dissipation and corrosion resistance for an outer packaging film of a lithium ion battery to solve the above problems.
The graphene composite flexible packaging film comprises a first polymer layer, a first adhesive layer, a graphene film layer, a second adhesive layer and a second polymer layer which are sequentially stacked, wherein the bottom surface of the graphene film layer is arranged opposite to the first polymer layer and is bonded with the first polymer layer through the first adhesive layer; the top surface of the graphene film layer is disposed opposite the second polymer layer and is bonded to the second polymer layer by a second adhesive layer.
Preferably, the material of the first polymer layer is at least one of polyester fiber, polyamide fiber, polyimide, polyethylene, polypropylene, polyacrylonitrile and polyethylene/polypropylene composite material.
Preferably, the first polymer layer is polyamide fiber.
Preferably, the material of the second polymer layer is at least one of polyester fiber, polyamide fiber, polyimide, polyacrylonitrile, polyethylene, polypropylene and polyethylene/polypropylene composite material.
Preferably, the material of the second polymer layer is polypropylene.
Preferably, the material of the first adhesive layer and the second adhesive layer is at least one of aliphatic polyether urethane adhesive, thermoplastic polyimide adhesive, polyvinyl acetal adhesive, polyurethane adhesive, epoxy resin adhesive or acidic polypropylene.
Preferably, the first adhesive layer and the second adhesive layer are polyurethane adhesives.
Preferably, the thickness of the graphene thin film layer is between 4 and 100 μm.
A lithium ion battery comprises the graphene composite flexible packaging film.
The graphene composite flexible packaging film provided by the invention is a composite film obtained by adopting a compact graphene film as an intermediate layer, and the graphene film can exist in a battery system very stably and is resistant to electrolyte corrosion, and has excellent barrier property and corrosion resistance. In addition, the graphene composite flexible packaging film is light and thin in texture and can well replace an aluminum plastic film.
On the other hand, the graphene material has high heat radiation performance and high heat conduction performance; the graphene composite flexible packaging film for the outer packaging film of the lithium ion battery can effectively solve the problem of heat dissipation, and the service life and the safety performance of the battery are improved.
Drawings
Fig. 1 is a schematic structural diagram of a graphene composite flexible packaging film provided by the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the following detailed description of the present invention is provided with reference to the accompanying drawings.
Please refer to fig. 1, wherein fig. 1 is a schematic structural diagram of a graphene composite flexible packaging film provided by the present invention.
The graphene composite flexible packaging film 100 provided by the invention comprises a first polymer layer 10, a first adhesive layer 20, a graphene film layer 30, a second adhesive layer 40 and a second polymer layer 50 which are sequentially stacked from the bottom. The first adhesive layer 20 is disposed between the first polymer 10 and the graphene film layer 30; the second adhesive layer 40 is disposed between the graphene film layer 30 and the second polymer layer 50.
The first polymer layer 10 is a bottom layer of the graphene composite flexible packaging film 100, and may be at least one of polyester fiber, polyamide fiber, polyimide, polyacrylonitrile, polyethylene, polypropylene, and polyethylene/polypropylene composite material, and preferably, the first polymer layer 10 is polypropylene. The first polymer layer 10 is located inside the lithium ion battery in normal use and has a thickness of between 4 and 100 μm.
The graphene film 30 is located in the middle of the graphene composite flexible packaging film 100. The top surface of the graphene film 30 is disposed toward the second polymer layer 20; the bottom surface of the graphene thin film 30 is disposed toward the first polymer layer 10. The graphene layer is a flexible graphene film with high compactness and good mechanical properties. The thickness of the graphene film is between 4 and 100 mu m.
The first adhesive layer 20 is disposed between the first polymer layer 10 and the graphene film layer 30, and bonds and fixes the bottom surfaces of the first polymer layer 10 and the graphene film layer 30. The first adhesive layer 10 may be at least one of an aliphatic polyether urethane adhesive, a thermoplastic polyimide adhesive, a polyvinyl acetal adhesive, a polyurethane adhesive, an epoxy resin adhesive, and an acidic polypropylene, and is preferably a polyurethane adhesive.
The second polymer layer 50 is a top layer of the graphene composite flexible packaging film 100, and may be at least one of polyester fiber, polyamide fiber, polyimide, polyethylene, polypropylene, polyacrylonitrile, and polyethylene/polypropylene composite material. Preferably, the material of the first polymer layer 10 is polyamide fibers. The second polymer layer 50 is located outside the lithium ion battery under normal use conditions, and the thickness of the second polymer layer 50 is between 4 and 100 μm. Preferably, the thickness of the second polymer layer 50 is between 10-30 μm.
The second adhesive layer 40 is disposed between the second polymer layer 50 and the graphene film layer 30, and bonds and fixes the top surfaces of the second polymer layer 50 and the graphene film layer 30.
The first polymer layer 10, the first adhesive layer 20, the graphene film layer 30, the second adhesive layer 40 and the second polymer layer 50 are bonded together by direct pressing or hot pressing, so as to prepare the graphene composite flexible packaging film 100. The graphene composite flexible packaging film 100 can be used for lithium ion batteries, and can also be used as a packaging material in other fields.
A packaging film of the lithium ion battery is the graphene composite flexible packaging film 100.
Example one
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 15 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 50 μm. The second polymer layer 50 is polyamide fibre PA and has a thickness of 20 μm.
Example two
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 50 μm. The second polymer layer 50 is polyester PET and has a thickness of 20 μm.
EXAMPLE III
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 30 μm. The second polymer layer 50 is polyester fiber and has a thickness of 20 μm.
Example four
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are respectively polyether urethane adhesives. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 30 μm. The second polymer layer 50 is polyamide fibre PA with a thickness of 15 μm.
EXAMPLE five
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polyethylene, and the thickness of the first polymer layer 10 is 15 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 50 μm. The second polymer layer 50 is polyamide fibre PA with a thickness of 15 μm.
EXAMPLE six
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is a composite (PE/PP) of polyethylene and polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 50 μm. The second polymer layer 50 is a polyamide fibre PET with a thickness of 20 μm.
EXAMPLE seven
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 30 μm. The second polymer layer 50 is a polyamide fibre PET with a thickness of 20 μm.
Example eight
In this embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene PP, and the thickness of the first polymer layer 10 is 4 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 4 μm. The second polymer layer 50 is a polyamide fiber with a thickness of 100 μm.
Example nine
In this embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene PP, and the thickness of the first polymer layer 10 is 100 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 100 μm. The second polymer layer 50 is polyester fiber and has a thickness of 4 μm.
Example ten
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 60 μm. The first adhesive layer 20 and the second adhesive layer 40 are polyurethane adhesives respectively. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 10 μm. The second polymer layer 50 is polyester fiber and has a thickness of 10 μm.
EXAMPLE eleven
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is polypropylene, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are respectively polyether urethane adhesives. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 30 μm. The second polymer layer 50 is polyamide fibre PA with a thickness of 15 μm.
Example twelve
In the present embodiment, the first polymer layer 10 of the graphene composite flexible packaging film 100 is made of a mixture of polypropylene, polyimide and polyacrylonitrile, and the thickness of the first polymer layer 10 is 20 μm. The first adhesive layer 20 and the second adhesive layer 40 are respectively polyether urethane adhesives. The graphene thin layer 30 is a dense flexible graphene thin film, and the thickness of the graphene thin layer is 30 μm. The second polymer layer 50 is made of polyamide fiber, polyimide, polyethylene, polypropylene and polyacrylonitrile, the specific proportion can be adjusted according to the requirement, and the thickness is 15 μm.
It should be noted that, although the present invention has been described with reference to specific embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. The utility model provides a compound flexible packaging film of graphite alkene which characterized in that: the graphene film comprises a first polymer layer, a first adhesive layer, a graphene film layer, a second adhesive layer and a second polymer layer which are sequentially stacked, wherein the bottom surface of the graphene film layer is arranged opposite to the first polymer layer and is bonded with the first polymer layer through the first adhesive layer; the top surface of the graphene film layer is disposed opposite the second polymer layer and is bonded to the second polymer layer by a second adhesive layer.
2. The graphene composite flexible packaging film of claim 1, wherein: the material of the first polymer layer is at least one of polyester fiber, polyamide fiber, polyimide, polyethylene, polypropylene, polyacrylonitrile and polyethylene/polypropylene composite material.
3. The graphene composite flexible packaging film of claim 2, wherein: the first polymer layer is a polyamide fiber.
4. The graphene composite flexible packaging film of claim 1, wherein: the material of the second polymer layer is at least one of polyester fiber, polyamide fiber, polyimide, polyacrylonitrile, polyethylene, polypropylene and polyethylene/polypropylene composite material.
5. The graphene composite flexible packaging film according to claim 4, wherein: the material of the second polymer layer is polypropylene.
6. The graphene composite flexible packaging film of claim 1, wherein: the first adhesive layer and the second adhesive layer are made of at least one of aliphatic polyether urethane adhesive, thermoplastic polyimide adhesive, polyvinyl acetal adhesive, polyurethane adhesive, epoxy resin adhesive or acidic polypropylene.
7. The graphene composite flexible packaging film according to claim 6, wherein: the first adhesive layer and the second adhesive layer are polyurethane adhesives.
8. The graphene composite flexible packaging film of claim 1, wherein: the thickness of the graphene film layer is between 4 and 100 mu m.
9. A lithium ion battery comprising the graphene composite flexible packaging film according to any one of claims 1 to 8.
CN202010537861.9A 2020-06-13 2020-06-13 Graphene composite flexible packaging film and lithium ion battery Pending CN111703141A (en)

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CN112218496A (en) * 2020-10-10 2021-01-12 江南大学 Thermal rectifying device and application thereof in regulating graphene thermal rectifying effect

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CN106887537A (en) * 2017-03-09 2017-06-23 北京旭碳新材料科技有限公司 A kind of aluminum plastic film composite bed and preparation method thereof and lithium ion battery
CN109037503A (en) * 2018-10-31 2018-12-18 福建巨电新能源股份有限公司 A kind of polymer Li-ion battery carbon composite membrane
CN109037498A (en) * 2018-07-26 2018-12-18 广州埃米石墨烯科技有限公司 A kind of lithium ion battery orientation graphene flexible packaging film and preparation method thereof
CN111251684A (en) * 2018-12-01 2020-06-09 深圳格林德能源集团有限公司 Full-plastic packaging film for lithium battery

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CN109037498A (en) * 2018-07-26 2018-12-18 广州埃米石墨烯科技有限公司 A kind of lithium ion battery orientation graphene flexible packaging film and preparation method thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112218496A (en) * 2020-10-10 2021-01-12 江南大学 Thermal rectifying device and application thereof in regulating graphene thermal rectifying effect
CN112218496B (en) * 2020-10-10 2021-08-17 江南大学 Thermal rectifying device and application thereof in regulating graphene thermal rectifying effect

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Application publication date: 20200925