Micro-nano-scale multifunctional carrier film, current collector and battery

Abstract

The utility model relates to the technical field of thin films, in particular to a micro-nano-scale multifunctional carrier thin film, a current collector and a battery. The utility model discloses a micro-nano-scale multifunctional carrier film. The micro-nano-scale multifunctional carrier film comprises a middle layer, the heat insulation layers are arranged on the upper layer and the lower layer of the middle layer; the grafting layer is arranged on the heat insulation layer; the pre-plating layer is arranged on the grafting layer; and the functional layer is arranged on the pre-plating layer. According to the micro-nano-scale multifunctional carrier film, the heat insulation layers are arranged on the upper layer and the lower layer of the middle layer, so that the middle layer is protected from being damaged by environmental factors, and the overall tensile strength and ductility of the film material are improved; a grafting layer is arranged on the surface of the heat insulation layer and used for improving interface bonding force; a pre-plating layer is arranged on the surface of the grafting layer and used for further improving the binding force of the plating layer.

Description

Technical Field

[0001] The present application relates to the technical field of thin films, and particularly to a micro-nano multi-functional carrier thin film, a current collector, and a battery. Background Art

[0002] With the continuous development of science and technology and the promotion of national policies related to user safety, conductive carrier thin films have attracted much attention due to their good conductivity, excellent mechanical properties, high safety performance, long durability, etc., and have achieved certain development and applications. However, most traditional carrier thin films are made of practical metal foils, and they can no longer meet the market demand due to their high production cost, poor mechanical properties, and poor safety. Therefore, there is an urgent need for a multi-functional carrier thin film that can meet the requirements of low production cost, excellent mechanical properties, and high safety. In the prior art, a polymer is used as the base material, and a metal conductive layer is attached to the upper and lower surfaces of the base material. This component can be used as a carrier thin film in multiple fields such as new energy, electronics, optoelectronics, etc., and has a low cost and reliable safety performance. However, the adhesion between the layers of this carrier thin film is poor, and there are many defects on the surface of the film material.

[0003] Therefore, it is necessary to provide a micro-nano multi-functional carrier thin film, a current collector, and a battery. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present application provides a micro-nano multi-functional carrier thin film, a current collector, and a battery, which are used to solve the problems of poor mechanical properties of the carrier thin film and many defects on the surface of the film material in the prior art. The micro-nano multi-functional carrier thin film described in the present application has heat insulation layers provided on the upper and lower layers of the intermediate layer to protect the intermediate layer from being damaged by environmental factors, so as to retain a relatively high tensile strength and elongation of the film material; a grafting layer is provided on the surface of the heat insulation layer to improve the interfacial bonding force between the pre-plated layer and the metal; a pre-plated layer is provided on the surface of the grafting layer to further improve the bonding force with the functional layer; a coating layer is provided on the surface of the functional layer, using materials with good conductivity such as conductive carbon black, carbon nanotubes, graphene, graphite, etc., to protect the functional layer from mechanical and physical damage in the use environment, and at the same time enhance the conductive performance of the functional layer.

[0005] The technical solution adopted by the present application to solve its technical problems is as follows:

[0006] In the first aspect, the present application provides a micro-nano multi-functional carrier thin film, including an intermediate layer;

[0007] Heat insulation layers, provided on the upper and lower layers of the intermediate layer;

[0008] A grafting layer, provided on the heat insulation layer;

[0009] A pre-plated layer, provided on the grafting layer;

[0010] A functional layer is provided on the pre-plated layer.

[0011] Furthermore, a coating layer is provided on the functional layer.

[0012] Furthermore, the thickness of the intermediate layer is 2 - 20 μm;

[0013] The thickness of the heat insulation layer is 10 - 100 nm;

[0014] The thickness of the grafting layer is 10 - 100 nm;

[0015] The thickness of the pre-plated layer is 50 - 100 nm;

[0016] The thickness of the functional layer is 100 nm - 1 μm;

[0017] The thickness of the coating layer is 10 - 100 nm.

[0018] Furthermore, the material of the intermediate layer is any one of PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), PA (polyamide), PVC (polyvinyl chloride), PI (polyimide), PC (polycarbonate), BOPP (biaxially oriented polypropylene), CPP (cast polypropylene), PMMA (polymethyl methacrylate), PS (polystyrene), ABS (acrylonitrile - butadiene - styrene copolymer), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and polysulfone (PS) - type, polyethersulfone (PES) - type.

[0019] Furthermore, the material of the heat insulation layer is any one of silicon oxide, zirconium oxide, titanium oxide, aluminum oxide, and antimony - doped tin oxide.

[0020] Furthermore, the raw material of the grafting layer is any one of modified styrene - butadiene rubber (SBR), polyvinylidene fluoride (PVDF), carboxymethyl cellulose (CMC), polytetrafluoroethylene (PTFE), and polyurethane.

[0021] Furthermore, the pre-plated layer is any one of aluminum oxide, copper oxide, and silicon oxide.

[0022] Furthermore, the material of the functional layer 5 is any one of aluminum, copper, gold, and silver;

[0023] Furthermore, the coating layer is any one of conductive carbon black, carbon nanotubes, carbon nanofibers, graphene, graphite, metal nanowires, titanium carbide, conductive polymers, and hybrid nanofillers.

[0024] In a second aspect, the present application provides a current collector, including the above - described micro - nano - scale multifunctional carrier thin film.

[0025] In a third aspect, the present application provides a battery, including the current collector described above.

[0026] The beneficial effects of the present application are as follows:

[0027] 1. For the micro-nano multi-functional carrier film described in the present application, heat insulation layers are provided on the upper and lower layers of the intermediate layer to protect the intermediate layer from being damaged by environmental factors, so as to protect the overall tensile strength and elongation rate of the film material; a grafting layer is provided on the surface of the heat insulation layer, using a high-temperature resistant and highly adhesive material to improve the interfacial bonding force; a pre-plating layer is provided on the surface of the grafting layer to further improve the plating bonding force; a coating layer is provided on the surface of the functional layer, using materials with good conductivity such as conductive carbon black, carbon nanotubes, graphene, and graphite to protect the functional layer from mechanical and physical damage in the use environment, and at the same time enhance the conductivity of the functional layer.

[0028] 2. The micro-nano multi-functional carrier film described in the present application has good conductivity, excellent mechanical properties, strong plasticity, and high durability, and can be widely used in the fields of electronics, optoelectronics, aerospace, automobiles, medical devices, and military equipment, and can be used to manufacture current collectors and batteries. Description of the Drawings

[0029] The present application will be further described below with reference to the drawings and embodiments.

[0030] Figure 1 is a schematic structural diagram of a micro-nano multi-functional carrier film described in the present application;

[0031] Figure 2 is a schematic structural diagram of the micro-nano multi-functional carrier film of Embodiment 1 described in the present application;

[0032] Figure 3 is a schematic structural diagram of the micro-nano multi-functional carrier film of Embodiment 2 described in the present application;

[0033] Among them: 1. Intermediate layer; 2. Heat insulation layer; 3. Grafting layer; 4. Pre-plating layer; 5. Functional layer; 6. Coating layer. Detailed Embodiments

[0034] The concept, specific structure and technical effects of the present application will be clearly and completely described below in combination with embodiments and drawings to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope protected by the present application. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the present invention can be combined interactively on the premise of not conflicting with each other.

[0035] As Figure 1 shown, the present application provides a micro-nano multi-functional carrier film, including an intermediate layer 1;

[0036] A heat insulation layer 2, arranged on the upper and lower layers of the intermediate layer 1;

[0037] A grafting layer 3, arranged on the heat insulation layer 2;

[0038] A pre-plating layer 4, arranged on the grafting layer 3;

[0039] A functional layer 5, arranged on the pre-plating layer 4.

[0040] Specifically, by sequentially performing multi-step coating on the intermediate layer, that is, first coating the heat insulation layer on the upper and lower layers of the intermediate layer; then setting the grafting layer on the heat insulation layer; continuing to set the pre-plating layer on the grafting layer; and continuing to coat the functional layer on the pre-plating layer; each layer uses different micro-nano materials, which can not only improve the mechanical properties of the film, but also endow the film with multiple functions.

[0041] Specifically, a coating layer 6 is further arranged on the functional layer 5. The materials used for the coating layer include but are not limited to materials with good conductivity such as conductive carbon black, carbon nanotubes, carbon nanofibers, graphene, graphite, metal nanowires, titanium carbide, conductive polymers, hybrid nano-fillers, etc. The coating layer has high conductivity and plays a certain protective role for the functional layer.

[0042] Specifically, the thickness of the intermediate layer 1 is 2 - 20 μm;

[0043] The thickness of the heat insulation layer 2 is 10 - 100 nm;

[0044] The thickness of the grafting layer 3 is 10 - 100 nm;

[0045] The thickness of the pre-plating layer 4 is 50 - 100 nm;

[0046] The thickness of the functional layer 5 is 100 nm - 1 μm;

[0047] The thickness of the coating layer 6 is 10 - 100 nm.

[0048] Specifically, the material of the intermediate layer 1 is any one of PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), PA (polyamide), PVC (polyvinyl chloride), PI (polyimide), PC (polycarbonate), BOPP (biaxially oriented polypropylene), CPP (cast polypropylene), PMMA (polymethyl methacrylate), PS (polystyrene), ABS (acrylonitrile - butadiene - styrene copolymer), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and polysulfone (PS) - type, polyethersulfone (PES) - type. In this application, the intermediate layer is the substrate. After the intermediate layer is corona - treated, its roughness increases, enhancing its surface adhesion. Then, heat - insulating layers are plated on the upper and lower layers of the intermediate layer.

[0049] Specifically, the material of the heat - insulating layer 2 is any one of silicon oxide, zirconium oxide, titanium oxide, aluminum oxide, and antimony - doped tin oxide. In this application, the material of the heat - insulating layer is a heat - insulating material, which protects the intermediate layer from environmental factors during the subsequent coating process, avoiding phenomena such as high - temperature burning, water vapor intrusion, and mechanical damage.

[0050] Specifically, the grafting layer 3 is an adhesive material, and the adhesive material can be, for example, any one of existing modified styrene - butadiene rubber (SBR), polyvinylidene fluoride (PVDF), carboxymethyl cellulose (CMC), polytetrafluoroethylene (PTFE), and polyurethane.

[0051] In this application, the grafting layer is bonded to the heat - insulating layer through the adhesive material, improving the bonding force between the above - mentioned heat - insulating layer and the pre - coating layer. The grafting layer has a high - strength bonding function.

[0052] Specifically, the pre - coating layer 4 is any one of aluminum oxide, copper oxide, and silicon oxide. The pre - coating layer is a pre - coated nano - material, which prepares for the thickening of the subsequent functional layer and can further improve the interfacial bonding force.

[0053] Specifically, the material of the functional layer is any one of aluminum, copper, gold, and silver; in this application, the functional layer selects metal materials with good conductivity such as aluminum, copper, gold, and silver.

[0054] Specifically, the coating layer 6 is any one of conductive carbon black, carbon nanotubes, carbon nanofibers, graphene, graphite, metal nanowires, titanium carbide, conductive polymers, and hybrid nano - fillers. The coating layer has high electrical conductivity and plays a certain protective role for the functional layer.

[0055] Example 1

[0056] In specific applications, the above-mentioned micro-nano multi-functional carrier film can be applied to a flexible integrated printed circuit board, such as Figure 2 shown. The middle layer serves as a support layer, and the materials that can be selected include polypropylene (PP), polyimide (PI), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polysulfone (PS) and polyethersulfone (PES); the material used for the heat insulation layer is alumina or zirconia; the material used for the grafting layer is a polymer adhesive, such as modified styrene-butadiene rubber (SBR), polyvinylidene fluoride (PVDF), carboxymethyl cellulose (CMC), polytetrafluoroethylene (PTFE), polyurethane, etc.; the material used for the pre-plating layer is copper oxide; the material used for the functional layer is copper; the material used for the coating layer is insulating ink.

[0057] On the flexible circuit board, a micro-nano multi-functional carrier film is provided; for the micro-nano multi-functional carrier film, the thickness of the middle layer is 4 microns, the thickness of the heat insulation layer is 100 nanometers, the thickness of the grafting layer is 200 nm, the thickness of the pre-plating layer is 100 nanometers, the thickness of the functional layer is 8 microns, and the thickness of the coating layer is 50 nanometers.

[0058] Example 2

[0059] The negative electrode current collector includes the micro-nano multi-functional carrier film as described in Figure 3 above. The thickness of the middle layer is 6 microns; the material used for the pre-plating layer is alumina; the material used for the functional layer is aluminum, and the thickness is 700 nanometers; the material used for the coating layer is materials with good conductivity such as conductive carbon black, carbon nanotubes, graphene and graphite.

[0060] In addition, the micro-nano multi-functional carrier film can also be used as a positive electrode current collector.

[0061] When used as a battery, it includes the current collector and electrolyte as described above.

[0062] The above is a specific description of the preferred embodiments of the present application. However, the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A micro-nano multifunctional carrier film, characterized in that: comprising an intermediate layer (1); Thermal insulation layers (2) are provided on the upper and lower layers of the intermediate layer (1); A grafting layer (3) is provided on the thermal insulation layer (2); a pre-plating layer (4) disposed on the grafting layer (3); A functional layer (5) is provided on the pre-plating layer (4).

2. The multifunctional carrier film according to claim 1, characterized in that: A coating layer (6) is also provided on the functional layer (5).

3. The multifunctional carrier film according to claim 2, characterized in that: The thickness of the intermediate layer (1) is 2-20 μm; The thickness of the heat-insulating layer (2) is 10-100 nm; The grafting layer (3) has a thickness of 10-200 nm; The thickness of the pre-plating layer (4) is 50-300 nm; The thickness of the functional layer (5) is 100 nm to 2 μm; The coating layer (6) has a thickness of 10-100 nm.

4. The multifunctional carrier film according to claim 1, characterized in that: The material of the intermediate layer (1) is any one of PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), PA (polyamide), PVC (polyvinyl chloride), PI (polyimide), PC (polycarbonate), BOPP (biaxially oriented polypropylene), CPP (cast polypropylene), PMMA (polymethyl methacrylate), PS (polystyrene), ABS (acrylonitrile-butadiene-styrene copolymer), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polysulfone (PS), and polyethersulfone (PES).

5. The multifunctional carrier film according to claim 1, characterized in that: The material of the heat insulation layer (2) is any one of silicon oxide, zirconium oxide, titanium oxide, aluminum oxide, and antimony-doped tin oxide.

6. The multifunctional carrier film according to claim 1, characterized in that: The raw material of the grafting layer (3) is any one of modified styrene-butadiene rubber (SBR), polyvinylidene fluoride (PVDF), carboxymethyl cellulose (CMC), polytetrafluoroethylene (PTFE), and polyurethane.

7. The multifunctional carrier film according to claim 1, characterized in that: The material of the pre-plating layer (4) is any one of aluminum oxide, copper oxide, and silicon oxide.

8. The multifunctional carrier film according to claim 2, characterized in that: The material of the functional layer (5) is any one of aluminum, copper, gold and silver; The coating layer (6) is made of any one of conductive carbon black, carbon nanotubes, carbon nanofibers, graphene, graphite, metal nanowires, titanium carbide, conductive polymers, and hybrid nanofillers.

9. A current collector, characterized in that: The invention comprises the micro-nano multifunctional carrier film according to any one of claims 1 to 8.

10. A battery, characterized in that: Comprising the current collector according to claim 9.

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