CN114927700A - High-weldability composite current collector and preparation method thereof - Google Patents

High-weldability composite current collector and preparation method thereof Download PDF

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Publication number
CN114927700A
CN114927700A CN202210753344.4A CN202210753344A CN114927700A CN 114927700 A CN114927700 A CN 114927700A CN 202210753344 A CN202210753344 A CN 202210753344A CN 114927700 A CN114927700 A CN 114927700A
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current collector
composite current
metal
weldability
nickel
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王成豪
李学法
张国平
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Yangzhou Nanopore Innovative Materials Technology Ltd
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Yangzhou Nanopore Innovative Materials Technology Ltd
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Priority to CN202210753344.4A priority Critical patent/CN114927700A/en
Publication of CN114927700A publication Critical patent/CN114927700A/en
Priority to PCT/CN2022/116790 priority patent/WO2024000804A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • 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
    • H01M4/662—Alloys
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

The invention relates to a high-weldability composite current collector and a preparation method thereof, wherein the high-weldability composite current collector comprises a film supporting layer, and alloy coatings are respectively arranged on two surfaces of the film supporting layer, which are arranged oppositely; wherein, the alloy coating comprises metal aluminum and metal nickel which are uniformly mixed. According to the invention, metal aluminum and metal nickel are mixed, and the metal nickel has excellent corrosion resistance and better weldability, so that the alloy plating layer containing the metal nickel has higher weldability, and the alloy plating layer with higher weldability is welded with the thin film supporting layer more firmly, thereby effectively solving the problems of infirm welding and insufficient welding in the welding process, and simultaneously effectively ensuring the electrical property and safety of the battery.

Description

High-weldability composite current collector and preparation method thereof
Technical Field
The invention relates to the technical field of secondary batteries, in particular to a high-weldability composite current collector and a preparation method thereof.
Background
The current composite current collector mainly comprises a copper current collector and an aluminum current collector, wherein the copper current collector or the aluminum current collector comprises two parts, namely a film supporting layer arranged in the middle and metal coatings arranged on two surfaces of the film supporting layer, which are arranged in an opposite manner. The thickness requirement of the metal coating is generally about 1-2.5 μm, and the preparation of the composite current collector is completed by an evaporation process, because the thickness of the metal coating is only 1-2.5 μm, the composite current collector provided with the metal coating is easy to have the phenomena of infirm welding and insufficient soldering in the welding process, especially for the aluminum current collector, because the weldability of metal aluminum is poor, the welding problem is more severe, and the batch use of the aluminum current collector is severely restricted.
Disclosure of Invention
Therefore, the composite current collector with high weldability and wide application range and capable of being used in large batch needs to be provided, and the problems of infirm welding and insufficient welding in the welding process can be effectively solved.
A high weldability composite current collector comprising:
the film supporting layer is provided with alloy coatings on two surfaces which are arranged oppositely;
wherein, the alloy coating comprises metal aluminum and metal nickel which are uniformly mixed.
Through mixing metal aluminium and metal nickel, because metal nickel has good corrosion resistance and better weldability, make the alloy cladding that contains metal nickel have higher weldability, make the higher alloy cladding of weldability and the welding of film supporting layer combine together comparatively firmly, thereby effectively solve and appear welding insecure, the rosin joint's problem in welding process, can effectively guarantee the electrical property and the security of battery simultaneously, and the composite current collector application scope of this application is wider, but large batch use.
In one embodiment, the ratio of the metallic aluminum to the metallic nickel is 1: 0.2-0.5.
In one embodiment, the purities of the metal aluminum and the metal nickel are both more than or equal to 99.8 percent.
In one embodiment, the thickness of the thin film support layer is in the range of 1 μm to 25 μm, and the thickness of the alloy plating is in the range of 1 μm to 2.5 μm.
In one embodiment, the puncture strength of the film support layer is more than or equal to 100gf, the MD tensile strength is more than or equal to 200MPa, the TD tensile strength is more than or equal to 200MPa, the MD elongation is more than or equal to 30%, and the TD elongation is more than or equal to 30%.
In one embodiment, the material of the film support layer includes at least one of an insulating polymer material, an insulating polymer composite material, a conductive polymer material, and a conductive polymer composite material.
In one embodiment, the insulating polymer material includes at least one of Polyamide (PA), polyester terephthalate, Polyimide (PI), Polyethylene (PE), polypropylene (PP), polystyrene (PPE), polyvinyl chloride (PVC), aramid, acrylonitrile-butadiene-styrene copolymer (ABS), polybutylene terephthalate (PET), poly (paraphenylene terephthalamide) (PPTA), polypropylene (PPE), Polyoxymethylene (POM), epoxy resin, phenol resin, Polytetrafluoroethylene (PTEE), polyvinylidene fluoride (PVDF), silicone rubber, Polycarbonate (PC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), cellulose, starch, proteins, their derivatives, their cross-linked compounds, and their copolymers.
In one embodiment, the insulating polymer composite material is a composite material formed by the insulating polymer material and an inorganic material;
wherein the inorganic material comprises at least one of a ceramic material, a glass material, and a ceramic composite material.
The present application also provides a method for preparing a high weldability composite current collector as described above, comprising the steps of:
mixing the metal aluminum and the metal nickel according to the weight ratio of 1: evaporating at a ratio of 0.2-0.5 to form aluminum particles and nickel ions;
the aluminum particles and the nickel ions are conveyed along the direction close to the film supporting layer and are attached to the two surfaces of the film supporting layer, which are arranged oppositely, so that the alloy plating layer is formed on the two surfaces of the film supporting layer, which are arranged oppositely.
In one embodiment, the heating and evaporating manners of the metal aluminum and the metal nickel include resistance heating, electron beam heating, radio frequency induction heating, arc heating and laser heating.
In the scheme, metal aluminum and metal nickel are mixed, and the metal nickel has excellent corrosion resistance and better weldability, so that the alloy plating layer containing the metal nickel has higher weldability, and the alloy plating layer with higher weldability and the film supporting layer are firmly combined together after being welded, thereby effectively solving the problems of infirm welding and insufficient welding in the welding process, and simultaneously effectively ensuring the electrical property and the safety of the battery; by setting the ratio of metallic aluminum to metallic nickel to 1: 0.2-0.5, the electrical property and the safety of the battery can be effectively ensured, the weldability of an alloy coating is ensured, the content of metallic nickel is not too high, and the electrical property of the battery is influenced; the content of the metallic nickel is not too low, otherwise, the weldability of the alloy coating cannot be ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a high solderability composite current collector according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating steps of a method for manufacturing a high weldability composite current collector according to an embodiment of the invention;
fig. 3 is a schematic flow chart illustrating steps of a method for manufacturing a composite current collector according to a comparative example of the present invention.
Description of the reference numerals
10. Compounding a current collector; 100. a film support layer; 200. and (4) alloy plating.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, an embodiment of the present invention provides a composite current collector 10 with high solderability, which includes a thin film support layer 100, and alloy plating layers 200 are respectively disposed on two opposite surfaces of the thin film support layer 100. The alloy plating layer 200 includes metal aluminum and metal nickel which are uniformly mixed. Because the weldability of the metal aluminum is low, the metal nickel with good weldability is mixed with the metal aluminum to ensure that the alloy plating layer 200 has high weldability, so that the problems of infirm welding and insufficient welding in the welding process are effectively solved, and the electrical property and the safety of the battery are ensured.
The puncture strength of the high-weldability composite current collector 10 is more than or equal to 50gf, the MD tensile strength is more than or equal to 180MPa, the TD tensile strength is more than or equal to 180MPa, the MD elongation is more than or equal to 10%, and the TD elongation is more than or equal to 10%. Exemplary high weldability composite current collector 10 has a puncture strength of 80gf, MD tensile strength of 260MPa, and TD tensile strength of 260 MPa. The MD elongation was 60% and the TD elongation was 60%. It should be noted that: MD (Machine Direction) refers to the Machine Direction and TD (Transverse Direction) refers to the Transverse Direction.
Referring to fig. 1, according to some embodiments of the present application, optionally, the ratio of metal aluminum to metal nickel is 1: 0.2-0.5. Specifically, the alloy plating layer 200 is made of metal aluminum and metal nickel, and the ratio of the metal aluminum to the metal nickel of the alloy plating layer 200 is 1: 0.2-0.5. That is, the content of the metal aluminum is higher than that of the metal nickel, so that the electrical property and safety of the battery can be effectively ensured, and the weldability of the alloy plating layer 200 can be ensured.
The ratio of the metal aluminum to the metal nickel is not limited in the present application, and can be in the range of 1: 0.2-0.5. It is to be understood that: the content of metallic nickel should not be too high, otherwise the electrical properties of the battery are affected. The content of metallic nickel should not be too low, otherwise the weldability of the alloy plating layer 200 cannot be ensured.
Referring to FIG. 1, according to some embodiments of the present application, the purities of the aluminum metal and the nickel metal are greater than or equal to 99.8%. That is, high-purity aluminum metal and high-purity nickel metal are used as aluminum metal and nickel metal in the present application. Specifically, the high-purity metallic nickel has excellent corrosion resistance, better weldability and electromagnetic control performance. The high-purity metal aluminum layer has the properties of low deformation resistance, high conductivity, good plasticity and the like. The weldability of the alloy plating layer 200 is further improved by using high-purity metallic nickel and high-purity metallic aluminum.
The peeling force between the alloy plating layer 200 and the film supporting layer 100 is more than or equal to 5N/m. Illustratively, the peel force between alloy plating 200 and thin film support layer 100 is 10N/m. The peeling force between the alloy plating layer 200 and the film support layer 100 is high, so that the alloy plating layer 200 and the film support layer 100 are not easy to fall off, and the electrical property and the safety of the battery are ensured.
Referring to fig. 1, according to some embodiments of the present application, optionally, the thin film support layer 100 has a thickness in a range of 1 μm to 25 μm, and the alloy plating layer 200 has a thickness in a range of 1 μm to 2.5 μm. It is to be understood that: the thickness of the highly solderable composite current collector 10 of the present application ranges from 3 μm to 30 μm. The thickness of the thin film support layer 100 is not limited in this application and can be selected from 1 μm to 25 μm. The thickness of alloy coating 200 is not limited in this application and can be selected from 1 μm to 2.5. mu.m. Illustratively, the thickness of the thin film support layer 100 is 20 μm and the thickness of the alloy plating layer 200 is 2 μm.
Referring to FIG. 1, according to some embodiments of the present application, optionally, the film support layer 100 has a puncture strength of 100gf or more, an MD tensile strength of 200MPa or more, a TD tensile strength of 200MPa or more, an MD elongation of 30% or more, and a TD elongation of 30% or more. Illustratively, the film support layer 100 has a puncture strength of 200f or more, an MD tensile strength of 300MPa or more, a TD tensile strength of 300MPa or more, an MD elongation of 50% or more, and a TD elongation of 50% or more.
It should be noted that: the upper limits of the puncture strength, MD tensile strength, TD tensile strength, MD elongation, and TD elongation of the film support layer 100 are not limited in this application, and may be set by the user as needed. The lower limit of the puncture strength of the film support layer 100 should not be lower than 100gf, the lower limit of the MD tensile strength should not be lower than 200MPa, the lower limit of the TD tensile strength should not be lower than 200MPa, the lower limit of the MD elongation should not be lower than 30%, and the lower limit of the TD elongation should not be lower than 30%, otherwise the mechanical properties of the film support layer 100 may be affected, and finally the puncture strength, MD tensile strength, TD tensile strength, MD elongation, and TD elongation of the composite current collector 10 with high weldability may be affected.
Referring to fig. 1, according to some embodiments of the present disclosure, a material of the film support layer 100 may optionally include at least one of an insulating polymer material, an insulating polymer composite material, a conductive polymer material, and a conductive polymer composite material.
Specifically, the insulating polymer material includes at least one of Polyamide (PA), polyester terephthalate, Polyimide (PI), Polyethylene (PE), polypropylene (PP), polystyrene (PPE), polyvinyl chloride (PVC), aramid, acrylonitrile-butadiene-styrene copolymer (ABS), polybutylene terephthalate (PET), polyparaphenylene terephthalamide (PPTA), polypropylene (PPE), Polyoxymethylene (POM), epoxy resin, phenol resin, Polytetrafluoroethylene (PTEE), polyvinylidene fluoride (PVDF), silicone rubber, Polycarbonate (PC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), cellulose, starch, protein, derivatives thereof, cross-linked products thereof, and copolymers thereof.
The insulating polymer composite material is a composite material formed by an insulating polymer material and an inorganic material. Wherein the inorganic material comprises at least one of a ceramic material, a glass material and a ceramic composite material.
The conductive polymer material may be at least one of doped polysulphide and doped polyacetylene.
The conductive polymer composite material may be a composite material formed by an insulating polymer material and a conductive material. Specifically, the conductive material may be at least one of a conductive carbon material, a metal material, and a composite conductive material. More specifically, the conductive carbon material is selected from at least one of carbon black, carbon nanotube, graphite, acetylene black, and graphene. The metal material is selected from at least one of metal nickel, metal iron, metal copper, metal aluminum or alloy of the above metals. The composite conductive material is selected from at least one of graphite powder coated by metallic nickel and carbon fiber coated by metallic nickel.
Referring to fig. 2, an embodiment of the present invention further provides a method for preparing a composite current collector 10 with high weldability, including the following steps:
step 1: mixing metal aluminum and metal nickel according to the ratio of 1: evaporating at a ratio of 0.2-0.5 to form aluminum particles and nickel ions.
Step 2: the aluminum particles and nickel ions are transported in a direction close to the film support layer 100 and attached to the two opposite surfaces of the film support layer 100 to form alloy plating layers 200 on the two opposite surfaces of the film support layer 100.
Specifically, the process of heating and evaporating the metal aluminum and the metal nickel is performed in a vacuum environment to prevent impurities from being doped in aluminum particles and nickel ions. The process of forming the alloy plating layer 200 on both surfaces of the thin film support layer 100, which are disposed opposite to each other, is also performed in a vacuum environment to prevent impurities from being doped in the alloy plating layer 200.
Referring to fig. 1, according to some embodiments of the present application, the aluminum metal and the nickel metal are optionally heated and evaporated by resistive heating, electron beam heating, radio frequency induction heating, arc heating, and laser heating. The application does not limit the heating and evaporating mode of the metal aluminum and the metal nickel, and can be set according to the use requirement. Illustratively, aluminum metal and nickel metal are heated and evaporated by arc heating.
Example (b):
the present disclosure is more particularly described in the following examples that are intended as illustrations only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise indicated, all parts, percentages, and ratios reported in the following examples are on a weight basis, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further treatment, and the equipment used in the examples is commercially available.
Method for preparing high-weldability composite current collector 10
Example 1:
step 1: mixing metal aluminum and metal nickel according to the weight ratio of 1: 0.5 to form aluminum particles and nickel ions. Wherein, the purity of the metal aluminum and the metal nickel is 99.9 percent.
Step 2: the aluminum particles and nickel ions are transported in a direction close to the film support layer 100 and attached to the two opposite surfaces of the film support layer 100 to form alloy plating layers 200 on the two opposite surfaces of the film support layer 100.
Among them, polybutylene terephthalate (PET) is used as the film support layer 100. The thickness of the thin film support layer 100 is 6 μm and the thickness of the alloy plating layer 200 ranges from 1 μm. Finally, the composite current collector 10 with high weldability of 8 microns is prepared, and after the preparation is completed, the composite current collector 10 with high weldability is cut, rolled and subjected to vacuum packaging operation.
Example 2:
step 1: mixing metal aluminum and metal nickel according to the weight ratio of 1: 0.35 to form aluminum particles and nickel ions. Wherein, the purity of the metal aluminum and the metal nickel is 99.9 percent.
And 2, step: the aluminum particles and nickel ions are transported in a direction close to the film support layer 100 and attached to two opposite surfaces of the film support layer 100 to form alloy plating layers 200 on the two opposite surfaces of the film support layer 100.
Among them, polybutylene terephthalate (PET) is used as the film support layer 100. The thickness of the thin film support layer 100 is 1 μm, and the thickness of the alloy plating layer 200 ranges from 1 μm. Finally, the 3-micron high-weldability composite current collector 10 is prepared, and after the preparation is completed, the high-weldability composite current collector 10 is cut, rolled and subjected to vacuum packaging operation.
Example 3:
step 1: mixing metal aluminum and metal nickel according to the ratio of 1: 0.2 to form aluminum particles and nickel ions. Wherein, the purity of the metal aluminum and the metal nickel is 99.9 percent.
Step 2: the aluminum particles and nickel ions are transported in a direction close to the film support layer 100 and attached to the two opposite surfaces of the film support layer 100 to form alloy plating layers 200 on the two opposite surfaces of the film support layer 100.
Among them, polybutylene terephthalate (PET) is used as the film support layer 100. The thickness of the thin film support layer 100 is 25 μm and the thickness of the alloy plating layer 200 ranges from 2.5 μm. And finally, preparing the composite current collector 10 with high weldability of 30 microns, and after the preparation is finished, slitting, rolling and vacuum packaging the composite current collector 10 with high weldability.
Comparative example 1:
referring to fig. 3, the method for preparing the composite current collector 10 according to the present comparative example includes the following steps:
step 1: a6 μm membrane support layer of 100 and 99.9% pure aluminum metal were selected. Among them, polybutylene terephthalate (PET) is used as the film support layer 100.
Step 2: respectively putting a film supporting layer 100 with the thickness of 6 microns and metal aluminum with the purity of 99.9 percent into vacuum coating equipment, and evaporating metal aluminum layers on two surfaces, which are opposite to the film supporting layer 100, of the film supporting layer to obtain the required composite current collector 10. In this embodiment, the thickness of the metal aluminum layer is 1 μm.
Finally, the composite current collector 10 with the diameter of 8 microns is prepared. After the composite current collector 10 is manufactured, the composite current collector 10 is slit, rolled and vacuum-packed.
Comparative example 2:
the preparation method of the composite current collector 10 provided by the present comparative example includes the following steps:
step 1: a 25 μm film support layer of 100 and 99.9% pure aluminum metal was chosen. Among them, polybutylene terephthalate (PET) is used as the film support layer 100.
And 2, step: respectively putting the film supporting layer 100 with the thickness of 25 micrometers and the metal aluminum with the purity of 99.9% into vacuum coating equipment, and evaporating metal aluminum layers on two surfaces, which are opposite to each other, of the film supporting layer 100 to obtain the required composite current collector 10. In this embodiment, the thickness of the metal aluminum layer is 2.5 μm.
Finally, 30 μm of composite current collector 10 was obtained. After the composite current collector 10 is manufactured, the composite current collector 10 is slit, rolled and vacuum-packed.
The composite current collectors 10 of examples 1 to 3 and comparative examples 1 to 2 were tested for welding tension, and the effect data as shown in table 1 were obtained. It is to be understood that: the welding tension of the composite current collector 10 refers to the welding tension between the film support layer 100 and the alloy plating layer 200, and between the film support layer 100 and the metal aluminum layer.
Table 1 shows weld pull test data for composite current collector 10.
Figure BDA0003721733330000111
Figure BDA0003721733330000121
TABLE 1
As can be seen from the above table, the welding tension of the composite current collector 10 with high weldability according to the present invention is greater than that of the composite current collector 10 according to the comparative example, and the welding tension of the composite current collector 10 is independent of the thickness of the film support layer 100, the thickness of the alloy plating layer 200, and the thickness of the metal aluminum layer, and is only dependent on the content of metal nickel, where the higher the content of metal nickel is, the greater the welding tension of the composite current collector 10 is.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A high weldability composite current collector, characterized in that it comprises:
the film supporting layer is provided with alloy coatings on two surfaces which are arranged oppositely;
wherein, the alloy coating comprises metal aluminum and metal nickel which are uniformly mixed.
2. The highly weldable composite current collector of claim 1, wherein the ratio of the metallic aluminum to the metallic nickel is 1: 0.2-0.5.
3. The high weldability composite current collector as claimed in claim 1, wherein the purity of metallic aluminum and metallic nickel is greater than or equal to 99.8%.
4. The highly weldable composite current collector of claim 1, wherein the thin film support layer has a thickness in the range of 1 μm to 25 μm and the alloy plating has a thickness in the range of 1 μm to 2.5 μm.
5. The high weldability composite current collector as claimed in claim 1, wherein said thin film support layer has a puncture strength of not less than 100gf, an MD tensile strength of not less than 200MPa, a TD tensile strength of not less than 200MPa, an MD elongation of not less than 30%, and a TD elongation of not less than 30%.
6. The composite current collector with high weldability according to claim 1, characterized in that the material of said thin film support layer includes at least one of insulating polymer material, insulating polymer composite material, conductive polymer material and conductive polymer composite material.
7. The high weldability composite current collector as claimed in claim 6, wherein said insulating polymer material comprises at least one of Polyamide (PA), polyterephthalate, Polyimide (PI), Polyethylene (PE), polypropylene (PP), polystyrene (PPE), polyvinyl chloride (PVC), aramid, acrylonitrile-butadiene-styrene copolymer (ABS), polybutylene terephthalate (PET), polyparaphenylene terephthalamide (PPTA), polypropylene (PPE), Polyoxymethylene (POM), epoxy resin, phenolic resin, Polytetrafluoroethylene (PTEE), polyvinylidene fluoride (PVDF), silicone rubber, Polycarbonate (PC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), cellulose, starch, proteins, their derivatives, their cross-linked substances and their copolymers.
8. The high weldability composite current collector as claimed in claim 6, wherein said insulating polymer composite material is a composite material formed of said insulating polymer material and an inorganic material;
wherein the inorganic material comprises at least one of a ceramic material, a glass material, and a ceramic composite material.
9. A method for preparing a highly weldable composite current collector according to claim 2, comprising the steps of:
mixing the metal aluminum and the metal nickel according to the weight ratio of 1: evaporating at a ratio of 0.2-0.5 to form aluminum particles and nickel ions;
the aluminum particles and the nickel ions are conveyed along the direction close to the film supporting layer and are attached to the two surfaces of the film supporting layer, which are arranged oppositely, so that the alloy plating layer is formed on the two surfaces of the film supporting layer, which are arranged oppositely.
10. The method for preparing the high-weldability composite current collector as claimed in claim 9, wherein the modes of heating and evaporating the metal aluminum and the metal nickel include resistance heating, electron beam heating, radio frequency induction heating, arc heating and laser heating.
CN202210753344.4A 2022-06-29 2022-06-29 High-weldability composite current collector and preparation method thereof Withdrawn CN114927700A (en)

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WO2024000804A1 (en) * 2022-06-29 2024-01-04 扬州纳力新材料科技有限公司 High-weldability composite current collector and preparation method therefor

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* Cited by examiner, † Cited by third party
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CN108754245A (en) * 2018-06-20 2018-11-06 华正金属材料(太仓)有限公司 A kind of composite material
CN108531793A (en) * 2018-07-12 2018-09-14 华正金属材料(太仓)有限公司 A kind of Al-alloy metal material
CN110943227B (en) * 2019-05-31 2021-03-09 宁德时代新能源科技股份有限公司 Composite current collector, electrode plate and electrochemical device
CN112186197A (en) * 2019-07-01 2021-01-05 宁德时代新能源科技股份有限公司 Positive current collector, positive pole piece and electrochemical device
CN113422062A (en) * 2021-05-11 2021-09-21 联动天翼新能源有限公司 Current collector, pole piece, battery and equipment
CN114927700A (en) * 2022-06-29 2022-08-19 扬州纳力新材料科技有限公司 High-weldability composite current collector and preparation method thereof

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Publication number Priority date Publication date Assignee Title
WO2024000804A1 (en) * 2022-06-29 2024-01-04 扬州纳力新材料科技有限公司 High-weldability composite current collector and preparation method therefor
CN115425236A (en) * 2022-09-06 2022-12-02 浙江柔震科技有限公司 Composite current collector and preparation method and device thereof
CN115425236B (en) * 2022-09-06 2023-06-02 浙江柔震科技有限公司 Composite current collector and preparation method and device thereof

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