Flexible current collector and preparation method thereof, electrode and battery

Abstract

The invention relates to the technical field of flexible current collectors, and provides a flexible current collector and a preparation method thereof, an electrode and a battery. The flexible current collector comprises a first textile fabric substrate and a plating layer, wherein the first textile fabric substrate is formed by weaving textile fabric cellosilk; and the plating layer is coated on the surface of the first textile fabric substrate and comprises a nickel element material and a phosphorus element material. The flexible current collector provided by the invention has relatively high electrode stability, so that the battery adopting the flexible current collector can be applicable to relatively high cut-off voltage, and the performance of electric equipment is effectively improved.

Description

Technical Field

[0001] This application belongs to the field of flexible current collector technology, and particularly relates to a flexible current collector and its preparation method, electrode, and battery. Background Technology

[0002] With the development of wearable devices, the need for flexible energy storage devices such as flexible supercapacitors, flexible lithium-ion capacitors, and flexible lithium-ion batteries is becoming increasingly urgent. It is well known that flexible energy storage devices can provide higher energy density when operating at higher cutoff voltages, but the performance of some of their components is unstable under high voltage conditions, severely limiting their applicable voltage range. Therefore, in order to enable flexible energy storage devices to use high-voltage cathode materials and improve the performance of electrical devices, it is imperative to improve the electrochemical stability of flexible energy storage devices. Flexible current collectors, as constituent materials of the electrodes in flexible energy storage devices, are a crucial factor restricting the electrochemical stability of these devices. Summary of the Invention

[0003] The purpose of this application is to provide a flexible current collector and its preparation method, electrode, and battery, which aim to improve the electrochemical stability of flexible energy storage devices under high voltage conditions.

[0004] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, this application provides a flexible current collector, the flexible current collector comprising:

[0006] The first textile base is formed by weaving textile fibers;

[0007] The coating, which covers the surface of the textile substrate, includes nickel and phosphorus materials.

[0008] Preferably, the coating is a nickel-phosphorus alloy, and the thickness of the coating is 500 nm to 1000 nm.

[0009] Preferably, the first textile substrate comprises:

[0010] At least one of polyethylene terephthalate, polypropylene, polyvinyl chloride, polyethylene, polyethylene naphthalate, polymethyl methacrylate, and polycarbonate.

[0011] Secondly, this application provides a method for preparing a flexible current collector, the method comprising:

[0012] The textile substrate is pretreated to obtain a pretreated product;

[0013] The pretreated product is placed in a mixture of quaternary ammonium salt monomer and potassium salt initiator and reacted at a first preset temperature for a first preset time to obtain a second treated product.

[0014] A palladium-containing catalyst layer is coated on the surface of the second processed product to obtain a third processed product;

[0015] The third processed product is placed in a mixture of a nickel-containing reagent and a phosphorus-containing reducing agent and reacted for a second preset time to obtain the flexible current collector.

[0016] Preferably, the textile substrate is pretreated to obtain a pretreated product, comprising:

[0017] The textile substrate is placed in a vacuum plasma chamber and treated for a third preset time to obtain the fourth processed product.

[0018] The fourth processed product is placed in a silanizing agent and reacted for a fourth preset time to obtain a pretreated product.

[0019] Thirdly, this application provides an electrode comprising a current collector and an electrode active material, wherein the current collector is a flexible current collector as described in any of the first aspects.

[0020] Preferably, the cutoff voltage of the electrode active material is between 3 and 4.7 V.

[0021] Fourthly, this application provides a battery comprising a positive electrode and a negative electrode, wherein the positive electrode employs the electrode described in the third aspect above.

[0022] Preferably, the current collector in the negative electrode includes a second textile substrate and a copper plating layer, wherein the copper plating layer covers the surface of the second textile substrate.

[0023] Fifthly, this application provides an electrical device that includes a battery as described in the fourth aspect above.

[0024] Beneficial effects of this application

[0025] This application provides a flexible current collector, comprising a first textile substrate and a coating covering the surface of the first textile substrate. The coating comprises nickel and phosphorus materials. The inventors of this application have discovered that by compounding nickel and phosphorus materials to form the coating, the resulting nickel-phosphorus material is amorphous or microcrystalline. Compared to the pure nickel coating material used in the prior art, it lacks crystal defects such as grain boundaries and dislocations, and consequently exhibits higher corrosion resistance and greater electrochemical stability. This allows batteries using this flexible current collector to withstand higher cutoff voltages, thereby effectively improving the performance of electrical equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an electron microscope image of a flexible current collector provided in an embodiment of this application;

[0028] Figure 2 This is a resistance variation diagram of the flexible current collector provided in the embodiments of this application;

[0029] Figure 3 This is one of the flowcharts of a method for preparing a flexible current collector provided in the embodiments of this application;

[0030] Figure 4 This is the second flowchart of a method for preparing a flexible current collector provided in the embodiments of this application;

[0031] Figure 5 These are comparison charts of linear scan voltammetry test data and cyclic voltammetry test data provided in the embodiments of this application;

[0032] Figure 6 These are comparison charts of capacity retention and coulomb efficiency provided in the embodiments of this application;

[0033] Figure 7 This is an electron microscope image of the negative electrode current collector provided in the embodiments of this application;

[0034] Figure 8 This is a resistance variation diagram of the negative electrode current collector provided in the embodiments of this application;

[0035] Figure 9 These are the capacity retention rate data change graphs and charge / discharge curves provided in the embodiments of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] For ease of description, the terms "first," "second," etc., used in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0038] It should be understood that in the various embodiments of this application, the order of the above processes does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0039] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0040] The weights of the relevant components mentioned in the embodiments of this application can refer not only to the specific content of each component, but also to the proportional relationship between the weights of the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this application is within the scope disclosed in the embodiments of this application. Specifically, the mass described in the embodiments of this application can be a mass unit known in the chemical industry, such as μg, mg, g, or kg.

[0041] In recent years, the rapid development of wearable devices has driven the advancement of flexible energy storage devices. Flexible energy storage devices can provide higher energy density when operating at higher cutoff voltages, but the performance of some device components is unstable under high voltage conditions, severely limiting their applicable voltage range. Therefore, in order to enable flexible energy storage devices to use high-voltage cathode materials and improve the performance of electrical devices, it is urgent to improve the electrochemical stability of flexible energy storage devices. Flexible current collectors, as constituent materials of the electrodes of flexible energy storage devices, are a crucial factor restricting the electrochemical stability of these devices. To address this, this application provides a flexible current collector and its preparation method to improve the electrode stability of flexible energy storage devices.

[0042] It's important to note that the cutoff voltage is the upper limit of the voltage range that an energy storage device can utilize during discharge. A higher cutoff voltage means the battery can discharge over a wider voltage range, releasing more energy and providing higher energy density. Increased energy density means the battery can store more energy within the same size and weight, providing greater power output, thus extending the lifespan of electrical equipment and improving its performance.

[0043] In embodiments achievable under this application, the flexible current collector includes a first textile substrate and a coating, wherein the first textile substrate is formed by weaving textile fibers, and the coating covers the surface of the first textile substrate, the coating including nickel and phosphorus materials.

[0044] The inventors of this application discovered through research that when nickel and phosphorus materials are compounded to form a coating, an oxide film forms on the surface of the resulting nickel-phosphorus material. This oxide film can prevent further oxidation reactions, and the addition of phosphorus helps to form a dense phosphide layer. This phosphide layer can effectively prevent oxidation reactions, thereby improving the stability of the nickel-phosphorus material. Compared with the prior art that only uses nickel as the coating material for flexible current collectors, the flexible current collector in this application has higher electrode stability, enabling batteries using this flexible current collector to be used with higher cut-off voltages, thereby effectively improving the performance of electrical equipment.

[0045] It should be noted that the above-mentioned coating can specifically cover the outer surface of each textile fiber in the first textile substrate, with a thickness between 500nm and 1000nm.

[0046] In some embodiments, the first textile substrate includes at least one of polyethylene terephthalate, polypropylene, polyvinyl chloride, polyethylene, polyethylene naphthalate, polymethyl methacrylate, and polycarbonate.

[0047] As a preferred embodiment, the textile fiber filament is selected as polyethylene terephthalate (PET), and the coating material covering the surface of the textile fiber filament is nickel-phosphorus alloy. Nickel-phosphorus alloy has a uniform grain structure and fine grain size, which helps to improve the corrosion resistance and stability of the coating.

[0048] As an example, Figure 1 An electron microscope image of a flexible current collector according to an embodiment of this application is shown. (Refer to...) Figure 1 a. The flexible current collector of this application is woven from multiple textile fibers in a grid pattern, as shown in the reference. Figure 1 b. A nickel-phosphorus alloy coating is uniformly applied to the surface of each textile fiber. The coating is uniform, intact, and crack-free, ensuring that the flexible current collector has high conductivity. Figure 2 The resistance change graph of the aforementioned flexible current collector NiPPET during the bending test is shown below. Figure 2 It can be seen that under a bending radius of 2 mm, after 10,000 bending cycles, the sheet resistance of NiPPET increases by less than 2%, which indicates that NiPPET has excellent resistance stability and reliable conductivity.

[0049] Figure 3 A flowchart illustrating a method for preparing a flexible current collector according to an embodiment of this application is shown, with reference to... Figure 3 The preparation method includes the following steps:

[0050] Step S1: Pre-treat the textile substrate to obtain the pre-treated product;

[0051] Step S2: The pretreated product is placed in a mixture of quaternary ammonium salt monomer and potassium salt initiator, and reacted at a first preset temperature for a first preset time to obtain a second treated product;

[0052] Step S3: Coat the surface of the second treated product with a palladium-containing catalyst layer to obtain the third treated product;

[0053] Step S4: The third processed product is placed in a mixture of nickel-containing reagent and phosphorus-containing reducing agent and reacted for a second preset time to obtain the flexible current collector.

[0054] The quaternary ammonium salt monomer includes methacryloyloxyethyltrimethylammonium chloride (METAC) at a concentration of 20% (v / v); the potassium salt initiator includes potassium persulfate and / or potassium permanganate, with a potassium persulfate concentration of 2 g / L; the nickel-containing reagent is a solution composed of Ni₂SO₄·5H₂O, sodium citrate, and sodium acetate, with Ni₂SO₄·5H₂O concentration of 40 g / L, sodium citrate concentration of 24 g / L, and sodium acetate concentration of 24 g / L; the phosphorus-containing reducing agent is a sodium hypophosphite solution; and the first preset temperature is 80 °C.

[0055] The first preset duration ranges from 1 to 3 hours, and the specific values ​​can include 1 hour, 1.5 hours, 2 hours, 2.5 hours, or 3 hours.

[0056] The second preset duration ranges from 45 to 90 minutes, and the specific values ​​can be 45 minutes, 60 minutes, 75 minutes, or 90 minutes.

[0057] It should be noted that the above values ​​are merely examples, and this application is not limited to them.

[0058] For example, the textile substrate is pretreated in step S1 to obtain a pretreated product. In step S2, the pretreated product is placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80°C for 3 h to obtain a second treated product. Then, in step S3, the second treated product is reacted in a palladium-containing reagent to coat the surface of the second treated product with a palladium-containing catalyst layer to obtain a third treated product. In step S4, the third treated product is placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate and sodium hypophosphite and subjected to an electrodeposition reaction at pH ~ 4 for 1 h to obtain a flexible current collector.

[0059] It should be noted that, since the textile substrate has poor hydrophilicity, in order to facilitate the smooth progress of subsequent reactions, the textile substrate needs to be pretreated in step S1 to obtain a pretreated product with better hydrophilicity.

[0060] As one possible embodiment, refer to Figure 4 Step S1 may specifically include:

[0061] Step S101: Place the textile substrate in a vacuum plasma chamber for a third preset time to obtain the fourth processed product;

[0062] Step S102: The fourth processed product is placed in a silanizing reagent and reacted for a fourth preset time to obtain a pretreated product.

[0063] The third preset duration ranges from 10 to 30 minutes, and the specific values ​​can include 10 minutes, 15 minutes, 20 minutes, 25 minutes, or 30 minutes.

[0064] The fourth preset duration ranges from 30 to 60 minutes, and specific values ​​can include 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, or 60 minutes.

[0065] The silanizing agent is a solution formed by dissolving 4% (v / v) 3-mercaptopropyltrimethoxysilane in 95% (v / v) ethanol, 1% (v / v) acetic acid and 4% (v / v) deionized water.

[0066] For example, the textile substrate is placed in a vacuum plasma chamber for 0.5 h to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane is dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid and 4% (v / v) deionized water to obtain a silanizing agent. The above fourth treated product is placed in the silanizing agent and reacted for 1 h to obtain a pretreated product.

[0067] The second processed product described above is reacted in a palladium-containing reagent in step S3 to coat the surface of the second processed product with a palladium-containing catalyst layer, thereby obtaining the third processed product. Specifically, this can be done in the following manner:

[0068] The second processed product is immersed in a palladium-containing catalyst solution and reacted for a fifth preset time to form a palladium-containing catalyst layer on the surface of the second processed product, thereby obtaining the third processed product.

[0069] The palladium-containing catalyst solution can be a (NH4)2PdCl4 solution with a concentration of 5 mM.

[0070] The fifth preset duration ranges from 30 to 60 minutes, and specific values ​​can include 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, or 60 minutes.

[0071] For example, the second treated product is immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 30 min to carry out an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- Catalyst coating.

[0072] Some embodiments of this application provide an electrode comprising a current collector and an electrode active material, wherein the current collector is a flexible current collector provided in the embodiments of this application.

[0073] Specifically, the cutoff voltage of the electrode active material is between 3 and 4.7V, and the electrode active materials that can be used include lithium cobalt oxide (LCO) and lithium nickel cobalt manganese oxide (NCM).

[0074] This application uses linear sweep voltammetry (LSV) and cyclic voltammetry (CV) to test the anodic stability of the flexible current collector. Figure 5 Figure a shows a comparison of linear sweep voltammetry test data for the flexible current collector (NiPPET) with a nickel-phosphorus coating and the flexible current collector (NiPET) with a nickel coating in this application. Figure 5 Figure b shows the cyclic voltammetry test data of the flexible current collector (NiPPET) containing a nickel-phosphorus coating in this application.

[0075] Reference Figure 5 As can be seen, when the anolyte current rises to around 4.7V, the test data for NiPPET is significantly higher than that for NiPET, indicating that NiPPET possesses higher electrochemical stability; (Refer to...) Figure 5 As can be seen from b, NiPPET can operate stably within a relatively high cutoff voltage range of 3-4.5V, indicating that this current collector is suitable for most common cathode materials, such as LCO and NCM, and can effectively improve the performance of electrical equipment.

[0076] Using Li foil as the counter electrode and NCM as the electrode material, half-cell tests were conducted on NiPPET in a coin cell, with Al as the control. Figure 6 a and Figure 6 Figure b shows a comparison of the capacity retention and coulombic efficiency of the NiPPET / NCM electrode and the Al / NCM electrode, respectively. It can be seen that the NiPPET / NCM electrode exhibits similar rate performance to the Al / NCM electrode, and it can operate stably during long-term cycling, demonstrating comparable capacity retention and coulombic efficiency. This indicates that NiPPET, as a flexible current collector, can withstand high potentials for extended periods in battery environments, and has significant application potential.

[0077] Some embodiments of this application provide a battery including a positive electrode and a negative electrode, the positive electrode employing the electrodes as described in the embodiments of this application.

[0078] It should be noted that the current collector in the above-mentioned negative electrode of the battery includes a second textile substrate and a copper plating layer, which covers the surface of the second textile substrate.

[0079] The second textile substrate includes at least one of polyethylene terephthalate, polypropylene, polyvinyl chloride, polyethylene, polyethylene naphthalate, polymethyl methacrylate, and polycarbonate.

[0080] Among the aforementioned materials, polyethylene terephthalate (PET) possesses advantages such as light weight, low price, good ductility, and durability. Furthermore, its preparation technology is mature, and thickness is easily controlled, indicating promising application prospects. However, PET exhibits relatively low electrochemical stability, particularly on the negative electrode side of lithium-ion batteries. To address this, this application pre-coats a copper layer onto the surface of PET using chemical plating, yielding a pre-product, CuPET. Subsequently, electroplating is employed, using CuPET as the working electrode and Cu foil as the counter electrode, to react and obtain the final product, ECuPET. This process protects the textile substrate beneath the copper plating from the influence of the lithium-ion battery electrolyte, thereby improving the electrochemical stability of the battery's negative electrode current collector.

[0081] As an example, polyethylene terephthalate (PET) was used as the second textile substrate to obtain the negative electrode current collector ECuPET. Figure 7 An electron microscope image of the negative electrode current collector ECuPET provided in an embodiment of this application is shown. (Refer to...) Figure 7 a. ECuPET is woven from multiple textile fibers in a grid pattern. (Refer to...) Figure 7b. A copper plating layer is uniformly coated on the surface of each textile fiber, and the plating layer is uniform, intact, and crack-free. The areal density of ECuPET is tested to be 2 mg·cm³. -2 The sheet resistance is 0.13 Ohm / sq. -2 . Figure 8 The graph showing the change in resistance of ECuPET during the bending test is shown. Figure 8 It can be seen that, under a bending radius of 2 mm, after 10,000 bending cycles, the sheet resistance of ECuPET only increases to 0.14 Ohm / sq. -2 This demonstrates that ECuPET exhibits excellent resistance stability.

[0082] In one possible embodiment, graphite Gr is used as the negative electrode active material, combined with the negative electrode current collector ECuPET as the negative electrode electrode, and NiPEPT / NCM is used as the positive electrode electrode to assemble a flexible pouch battery ECuPET / Gr||NCM / NiPPET. Figure 9 Figure a shows the capacity retention data of a flexible pouch cell after bending cycles at bending radii of 5 mm, 2 mm, and 1 mm. (Refer to...) Figure 9 It can be seen that the flexible pouch cell ECuPET / Gr||NCM / NiPPET still has a high capacity retention rate of 88.4% after 1000 bending cycles. It can also exhibit excellent mechanical robustness even under bending conditions with a bending radius of 2mm. Under the condition of a lower bending radius of 1mm, the battery capacity decays faster, but after 1500 bending cycles, the battery capacity retention rate can still reach 78.4%. Figure 9 b shows the charge-discharge curves (GCD curves) of the flexible pouch cell after bending cycles. (Refer to...) Figure 9 b. The charge-discharge curves show that the flexible pouch cell ECuPET / Gr||NCM / NiPPET can still operate stably after different bending cycles, which also proves that the flexible current collector provided in this application has high electrode stability.

[0083] Some embodiments of this application provide an electrical device, including a battery as described in the embodiments of this application. In the embodiments of this application, the battery can be a power source for the electrical device or an energy storage unit for the electrical device.

[0084] The batteries disclosed in some embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft.

[0085] Some embodiments of this application provide an electrical device that uses a battery as a power source. This electrical device can be, but is not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be, but are not limited to, gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be, but are not limited to, pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0086] Example

[0087] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0088] Example 1

[0089] The textile substrate was treated in a vacuum plasma chamber for 30 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 1 h to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 3 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 30 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product, which is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite. An electrodeposition reaction is carried out at pH 4 for 1 hour to obtain a flexible current collector.

[0090] Example 2

[0091] The textile substrate was treated in a vacuum plasma chamber for 20 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 50 min to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 2 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 45 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product. This third treated product is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite, and subjected to an electrodeposition reaction at pH 4 for 90 min to obtain a flexible current collector.

[0092] Example 3

[0093] The textile substrate was treated in a vacuum plasma chamber for 18 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 30 min to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 1 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 35 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product, which is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite. An electrodeposition reaction is carried out for 45 minutes at pH 4 to obtain a flexible current collector.

[0094] Example 4

[0095] The textile substrate was treated in a vacuum plasma chamber for 10 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 45 min to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 2.5 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 50 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product. This third treated product is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite, and subjected to an electrodeposition reaction for 55 minutes at pH 4 to obtain a flexible current collector.

[0096] Example 5

[0097] The textile substrate was treated in a vacuum plasma chamber for 25 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 35 min to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 1.5 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 40 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product. This third treated product is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite, and subjected to an electrodeposition reaction for 80 minutes at pH 4 to obtain a flexible current collector.

[0098] Example 6

[0099] The textile substrate was treated in a vacuum plasma chamber for 15 min to obtain a fourth treated product. 4% (v / v) 3-mercaptopropyltrimethoxysilane was dissolved in 95% (v / v) ethanol, 1% (v / v) acetic acid, and 4% (v / v) deionized water to obtain a silanizing agent. The fourth treated product was reacted in the silanizing agent for 45 min to obtain a pretreated product. The textile substrate was pretreated to obtain a pretreated product. This pretreated product was placed in a mixture of 20% (v / v) methacryloyloxyethyltrimethylammonium chloride and 2 g / L potassium persulfate and reacted at 80 °C for 3 h to obtain a second treated product. The second treated product was immersed in a 5 mM (NH4)2PdCl4 solution and reacted for 30 min to perform an ion exchange reaction to coat the surface of the second treated product with [PdCl4]. 2- The catalyst coating yields a third treated product. This third treated product is then placed in a mixed solution of Ni2SO4·5H2O, sodium citrate, sodium acetate, and sodium hypophosphite, and subjected to an electrodeposition reaction at pH 4 for 70 min to obtain a flexible current collector.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flexible current collector, characterized in that, The flexible current collector includes: The first textile base is formed by weaving textile fibers; The coating, which covers the surface of the first textile substrate, includes nickel and phosphorus materials.

2. The flexible current collector according to claim 1, characterized in that, The coating is a nickel-phosphorus alloy, and the thickness of the coating is 500nm to 1000nm.

3. The flexible current collector according to claim 1, characterized in that, The first textile substrate includes: At least one of polyethylene terephthalate, polypropylene, polyvinyl chloride, polyethylene, polyethylene naphthalate, polymethyl methacrylate, and polycarbonate.

4. A method for preparing a flexible current collector, characterized in that, The preparation method includes: The textile substrate is pretreated to obtain a pretreated product; The pretreated product is placed in a mixture of quaternary ammonium salt monomer and potassium salt initiator and reacted at a first preset temperature for a first preset time to obtain a second treated product. A palladium-containing catalyst layer is coated on the surface of the second processed product to obtain a third processed product; The third processed product is placed in a mixture of a nickel-containing reagent and a phosphorus-containing reducing agent and reacted for a second preset time to obtain the flexible current collector.

5. The preparation method according to claim 4, characterized in that, The textile substrate is pretreated to obtain a pretreated product, including: The textile substrate is placed in a vacuum plasma chamber and treated for a third preset time to obtain the fourth processed product. The fourth processed product is placed in a silanizing agent and reacted for a fourth preset time to obtain a pretreated product.

6. An electrode, said electrode comprising a current collector and an electrode active material, characterized in that, The current collector is a flexible current collector as described in any one of claims 1 to 2.

7. The electrode according to claim 6, characterized in that, The cutoff voltage of the electrode active material is between 3 and 4.7 V.

8. A battery, characterized in that, The battery includes a positive electrode and a negative electrode, wherein the positive electrode is an electrode as described in claim 6.

9. The battery according to claim 8, characterized in that, The current collector in the negative electrode includes a second textile substrate and a copper plating layer, wherein the copper plating layer covers the surface of the second textile substrate.

10. An electrical appliance, characterized in that, The electrical device includes the battery as described in claim 8.

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