Ultraviolet curing type silicon-carbon negative electrode material as well as preparation method and application thereof

Abstract

The invention discloses an ultraviolet light curing type silicon-carbon negative electrode material and a preparation method and application thereof, and belongs to the technical field of battery materials, the ultraviolet light curing type silicon-carbon negative electrode material comprises a polymer monomer, a photoinitiator, a cross-linking agent, silicon-carbon powder, a porous material and a solvent; the polymer monomer is butyl acrylate. According to the invention, by selecting the elastic butyl acrylate as a polymer monomer, silicon-carbon particles with irregular shapes can be packaged in an electrode structure, and volume expansion of silicon elements due to heating in an electrode preparation process is effectively buffered, so that the structural stability of the whole material is improved; contact between particles and transmission of mechanical stress are prevented, pressure caused by volume expansion is buffered, and integrity and uniformity of the structure are maintained. Compared with a silicon-carbon negative electrode prepared by adopting a traditional binder, a lithium ion battery prepared by adopting the ultraviolet curing type silicon-carbon negative electrode material provided by the invention has higher first-circle coulombic efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery materials technology, specifically to an ultraviolet-curable silicon-carbon anode material, its preparation method, and its application. Background Technology

[0002] The negative electrode materials of lithium-ion batteries are mainly divided into two categories: carbon materials and non-carbon materials. Commercial lithium-ion batteries mainly use graphite, a carbon material, as the negative electrode material. The theoretical specific capacity of graphite is 372 mAh / g. Among non-carbon materials, silicon-based negative electrode materials have attracted much attention due to their high theoretical specific capacity (4200 mAh / g). With the advancement of science and technology, silicon-carbon negative electrode materials have been gradually developed.

[0003] However, in practical applications, it has been found that although silicon-carbon anode materials have a significant advantage in specific capacity, their compatibility with conventional binders is poor, resulting in poor adhesion between the coated silicon-carbon anode material and the current collector, and the coating is prone to peeling and cracking. In existing technologies, although the synergistic effect of formulations of curing agents, binders, and dispersants such as sodium alginate, polyacrylic acid (PAA), sodium carboxymethyl cellulose (CMC), and styrene-butadiene rubber (SBR) can crosslink the entire anode material, this method, while enhancing the electrolyte wetting effect of the anode sheet (the anode carbon material often has poor electrolyte wetting), also affects the migration rate of lithium ions in the main electrolyte solvent, increasing battery impedance. Furthermore, although temperature can promote the crosslinking rate of PAA, CMC, and SBR with silicon-carbon particles, crosslinking is often not completed during formation and requires several battery cycles. This leads to the continued generation of water during the later crosslinking process, which in turn causes side reactions with the electrolyte, affecting battery cycle life. Furthermore, materials such as PAA and PAA-Li possess high rigidity, which, while effectively suppressing the volume expansion of silicon in silicon-carbon anode materials to some extent, makes them prone to self-polymerization during homogenization or drying. This self-polymerization generates polymers with higher molecular weights, resulting in greater macroscopic brittleness of the electrode. This brittleness makes the electrode susceptible to cracking or falling off due to external forces during electrode processing or battery manufacturing. These phenomena not only affect battery production efficiency but, more importantly, lead to a reduction in battery capacity and cycle life.

[0004] Furthermore, existing electrode fabrication processes involve numerous steps and complex condition control, which can easily lead to inconsistencies in material properties, thereby affecting battery stability and overall electrochemical performance. This can also increase production costs and complexity, limiting their industrial application. Therefore, existing silicon-carbon anode material fabrication processes still require improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a UV-curable silicon-carbon anode material to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A UV-curable silicon-carbon anode material comprises the following components by weight: 3-7 parts polymer monomer, 0.16-0.37 parts photoinitiator, 0.52-1.21 parts crosslinking agent, 30-70 parts silicon-carbon powder, 0.1-5 parts porous material, and 30-70 parts solvent; wherein the polymer monomer is butyl acrylate; and the porous material is a porous hydrogen-bonded organic framework material.

[0007] Preferably, the photoinitiator is diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide.

[0008] Preferably, the crosslinking agent is polyethylene glycol diacrylate.

[0009] Preferably, the solvent is N,N-dimethylformamide.

[0010] Preferably, the method for preparing the porous material includes the following steps: 3,4,9,10-perylenetetracarboxylic dianhydride and dicyandiamide were mixed and added to N,N-dimethylformamide and ethylene glycol to obtain a reaction solution; The reaction solution is heated and reacted, the resulting product is filtered, and then washed and dried to obtain the porous material.

[0011] Preferably, the mass ratio of 3,4,9,10-perylenetetracarboxylic dianhydride to dicyandiamide is 1:(1.5-2.5).

[0012] Preferably, the temperature of the heating reaction is 180-220℃.

[0013] Another object of the present invention is to provide a method for preparing the above-mentioned UV-curable silicon-carbon anode material, which includes the following steps: The polymer monomers are mixed with the solvent; Add the photoinitiator dropwise while stirring; Add silicon carbide powder while stirring; Add the porous material while stirring; A crosslinking agent was added dropwise while stirring to obtain a UV-curable silicon-carbon anode material.

[0014] Another object of the present invention is to provide an application of the above-mentioned UV-curable silicon-carbon anode material in the preparation of lithium-ion batteries.

[0015] Preferably, the lithium-ion battery includes a positive electrode and a negative electrode, and the method for preparing the negative electrode includes the following steps: The UV-curable silicon-carbon anode material is vacuum defoamed and then coated onto the current collector. The current collector coated with the UV-curable silicon-carbon anode material is UV-cured and then subjected to gradient drying to obtain the anode.

[0016] The UV-curable silicon-carbon anode material provided by this invention, by selecting elastic butyl acrylate as the polymer monomer, can encapsulate irregularly shaped silicon-carbon particles within the electrode structure. This effectively buffers the volume expansion of silicon elements during electrode fabrication due to heating, thereby improving the overall structural stability of the material, preventing interparticle contact and the transmission of mechanical stress, and facilitating the buffering of pressure caused by volume expansion, maintaining the integrity and uniformity of the structure. Compared to silicon-carbon anodes prepared using traditional binders, lithium-ion batteries made with the UV-curable silicon-carbon anode material provided by this invention have higher first-cycle coulombic efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic flowchart illustrating a UV-curable silicon-carbon anode material and its preparation method, provided in an embodiment of the present invention.

[0018] Figure 2 Scanning electron microscope image of the UV-curable silicon-carbon anode prepared in Example 1.

[0019] Figure 3 The first charge-discharge curves are shown for lithium-ion batteries made using the UV-curable silicon-carbon anode of Example 2 and the binder-type silicon-carbon anode of Comparative Example 1. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, in one embodiment of the present invention, a UV-curable silicon-carbon anode material and a method for preparing the anode are provided, which includes the following steps: S1. Mix 3-7 parts by weight of polymer monomer with 30-70 parts by weight; S2. While stirring, add 0.16-0.37 parts of photoinitiator dropwise; S3. While stirring, add 30-70 parts of silicon carbide powder; S4. While stirring, add 0.1-5 parts of porous material; S5. While stirring, add 0.52-1.21 parts of crosslinking agent dropwise to obtain UV-curable silicon-carbon anode material; S6. After vacuum defoaming treatment, the above-mentioned UV-curable silicon-carbon anode material is then coated onto the current collector. S7. The current collector coated with UV-curable silicon-carbon anode material is UV-cured. S8. After UV curing, gradient drying is performed to obtain the negative electrode for lithium-ion batteries.

[0022] The polymer monomer selected is butyl acrylate; butyl acrylate is a type of artificial rubber elastomer, which is inexpensive and has excellent elasticity and thermal stability. The photoinitiator selected is diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide, but it is not limited to this. Diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide is a commonly used UV curing agent, which makes it more convenient to control the polymerization reaction. The crosslinking agent selected is polyethylene glycol diacrylate with a molecular weight of 575, but it is not limited to this; polyethylene glycol diacrylate is used for better crosslinking of polymer monomers; The solvent used is N,N-dimethylformamide, but it is not limited to this. Other solvents that can uniformly disperse the above raw materials can also be used. Among them, N,N-dimethylformamide is often used as a solvent in lithium-ion batteries, which helps to improve the migration rate of lithium ions. The silicon carbide powder can be the C ONE-SC 1800 product sold by Carbon One New Energy Group Co., Ltd., but it is not limited to this product. Other commercially available silicon carbide sources can also be used. The porous material is selected from porous hydrogen-bonded organic framework materials. Specifically, the preparation method of the porous material includes the following steps: mixing 3,4,9,10-perylenetetracarboxylic dianhydride and dicyandiamide, and adding them to N,N-dimethylformamide and ethylene glycol to obtain a reaction solution; heating the reaction solution to 180-220℃ for reaction, filtering the obtained product, and washing and drying it to obtain the porous material. The mass ratio of 3,4,9,10-perylenetetracarboxylic dianhydride to dicyandiamide is 1:(1.5-2.5).

[0023] Copper foil can be used as the current collector, but it is not limited to this.

[0024] It should be noted that the irradiation wavelength used for UV curing can be selected based on the wavelength that the photoinitiator effectively absorbs, such as 350-400 nm in the UV-A region. The UV curing time varies from a few minutes to several hours, depending on the thickness of the polymer layer and the polymerization rate. The drying temperature varies from 60-100℃, depending on the volatility of the solvent and the thermal stability of the polymer; the drying time varies from several hours to more than ten hours, depending on the thickness of the polymer layer and the solvent content.

[0025] In this embodiment of the invention, the UV-curable silicon-carbon anode material exhibits excellent tensile and compressive elasticity, allowing it to penetrate and occupy the internal voids of a porous electrode, encapsulating irregularly shaped silicon-carbon particles within the electrode structure. Furthermore, through UV curing, this material can tightly adhere the silicon-carbon particles to the current collector surface. As the electrode reaction proceeds, the material's excellent elasticity dissipates the stress generated by the expansion of the silicon particles, maintaining the integrity of the electrode structure. This results in more stable cycling of the lithium-ion battery, facilitating its large-scale development. This embodiment of the invention addresses the problems of poor adhesion between the silicon-carbon anode material and the current collector, leading to easy coating detachment and cracking in existing technologies; it also solves the problems of numerous process steps and complex condition control in existing technologies.

[0026] The following embodiments are some specific implementation examples of the present invention in practical applications, but are not limited thereto.

[0027] Example 1: This example provides a method for preparing a UV-curable silicon-carbon anode, which includes the following steps: S1. Weigh 0.05g of butyl acrylate and 0.5g of N,N-dimethylformamide into a 5mL glass vial equipped with a stir bar, mix well to obtain a polymer monomer solution. S2. While stirring, add 0.0026 g of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide to the above polymer monomer solution and stir for 10 min to completely dissolve the solid. The solution remains clear and transparent to obtain a mixed solution. S3. Weigh 500mg of silicon carbide powder, grind it in a quartz mortar for 30 minutes, and then add it to the above mixed solution while stirring with a spatula. Continue stirring for 1 hour. The silicon carbide powder is the commercially available product C ONE-SC 1800 from Carbon One New Energy Group Co., Ltd. S4. Weigh 10 mg of porous hydrogen-bonded organic framework material and grind it in a quartz mortar for 20 min. While stirring, add it to the above mixed solution with a spatula and continue stirring for 1 h. The preparation method of porous hydrogen-bonded organic framework material includes the following steps: Mix 2 g of 3,4,9,10-perylenetetracarboxylic dianhydride and 4.05 g of dicyandiamide and add it to a mixed solvent of 20 mL of N,N-dimethylformamide and 20 mL of ethylene glycol to obtain a reaction solution. Stir the reaction solution magnetically at room temperature for 4 h, then transfer it to a reactor, seal it, and heat it in a muffle furnace at 200 °C for 60 h. After the reactor cools, filter the obtained product using a glass suction funnel and wash it sequentially with ethanol, dichloromethane, N,N-dimethylformamide, deionized water, and acetone. Then dry it in a vacuum drying oven at 80 °C for 8 h to obtain porous hydrogen-bonded organic framework material. S5. Continue to add 0.0086g of polyethylene glycol diacrylate dropwise while stirring, and continue stirring for 4 hours to obtain a slurry; S6. Place the above slurry in a vacuum oven and vacuum defoam for 1 minute without heating. Then tighten the bottle mouth, place it on the stirring table and stir appropriately for 60 seconds. Add it to the copper foil surface with a dropper and coat it with a scraper.

[0028] S7. Place the coated copper foil under a 365nm wavelength ultraviolet lamp for 45 minutes to obtain the electrode.

[0029] S8. Finally, place the electrode in a 60℃ oven to dry for 2 hours, then raise the temperature to 80℃ and dry for 2 hours to obtain a UV-curable silicon-carbon anode.

[0030] Example 2: This example provides a method for preparing a UV-curable silicon-carbon anode, which includes the following steps: S1. Weigh 0.03g of butyl acrylate and 0.3g of N,N-dimethylformamide into a 5mL glass vial equipped with a stir bar, mix well to obtain a polymer monomer solution; S2. While stirring, add 0.0016 g of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide to the above polymer monomer solution and stir for 10 min to completely dissolve the solid. The solution remains clear and transparent to obtain a mixed solution. S3. Weigh 300mg of silicon carbide powder, grind it in a quartz mortar for 30 minutes, and then add it to the above mixed solution while stirring with a spatula. Continue stirring for 1 hour. The silicon carbide powder is the commercially available product C ONE-SC 1800 from Carbon One New Energy Group Co., Ltd. S4. Weigh 1 mg of porous hydrogen-bonded organic framework material and grind it in a quartz mortar for 20 min. While stirring, add it to the above mixed solution with a spatula and continue stirring for 1 h. The preparation method of porous hydrogen-bonded organic framework material includes the following steps: mix 2 g of 3,4,9,10-perylenetetracarboxylic dianhydride and 3 g of dicyandiamide, and add it to a mixed solvent of 20 mL of N,N-dimethylformamide and 20 mL of ethylene glycol to obtain a reaction solution; stir the reaction solution magnetically at room temperature for 4 h, then transfer it to a reactor, seal it, and heat it in a muffle furnace at 180 °C for 60 h; after the reactor cools, filter the obtained product using a glass suction funnel, and wash it successively with ethanol, dichloromethane, N,N-dimethylformamide, deionized water, and acetone, and then dry it in a vacuum drying oven at 80 °C for 8 h to obtain porous hydrogen-bonded organic framework material. S5. Continue to add 0.0052g of polyethylene glycol diacrylate dropwise while stirring, and continue stirring for 4 hours to obtain a slurry; S6. Place the above slurry in a vacuum oven and vacuum defoam for 1 minute without heating. Then tighten the bottle mouth, place it on the stirring table and stir appropriately for 60 seconds. Add it to the copper foil surface with a dropper and coat it with a scraper.

[0031] S7. Place the coated copper foil under a 365nm wavelength ultraviolet lamp for 40 minutes to obtain the electrode.

[0032] S8. Finally, place the electrode in a 60℃ oven to dry for 2 hours, then raise the temperature to 80℃ and dry for 2 hours to obtain a UV-curable silicon-carbon anode.

[0033] Example 3: This example provides a method for preparing a UV-curable silicon-carbon anode, which includes the following steps: S1. Weigh 0.07g of butyl acrylate and 1g of N,N-dimethylformamide into a 5mL glass vial equipped with a stir bar, mix well to obtain a polymer monomer solution. S2. While stirring, add 0.0037 g of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide to the above polymer monomer solution and stir for 10 min to completely dissolve the solid. The solution remains clear and transparent to obtain a mixed solution. S3. Weigh 700mg of silicon carbide powder, grind it in a quartz mortar for 30 minutes, and then add it to the above mixed solution while stirring with a spatula. Continue stirring for 1 hour. The silicon carbide powder is the commercially available product C ONE-SC 1800 from Carbon One New Energy Group Co., Ltd. S4. Weigh 50 mg of porous hydrogen-bonded organic framework material and grind it in a quartz mortar for 20 min. While stirring, add it to the above mixed solution with a spatula and continue stirring for 1 h. The preparation method of porous hydrogen-bonded organic framework material includes the following steps: mix 2 g of 3,4,9,10-perylenetetracarboxylic dianhydride and 5 g of dicyandiamide, and add it to a mixed solvent of 20 mL of N,N-dimethylformamide and 20 mL of ethylene glycol to obtain a reaction solution; stir the reaction solution magnetically at room temperature for 4 h, then transfer it to a reactor, seal it, and heat it in a muffle furnace at 220 °C for 60 h; after the reactor cools, filter the obtained product using a glass suction funnel, and wash it successively with ethanol, dichloromethane, N,N-dimethylformamide, deionized water, and acetone, and then dry it in a vacuum drying oven at 80 °C for 8 h to obtain porous hydrogen-bonded organic framework material. S5. Continue to add 0.0121g of polyethylene glycol diacrylate dropwise while stirring, and continue stirring for 4 hours to obtain a slurry; S6. Place the above slurry in a vacuum oven and vacuum defoam for 1 minute without heating. Then tighten the bottle mouth, place it on the stirring table and stir appropriately for 60 seconds. Add it to the copper foil surface with a dropper and coat it with a scraper.

[0034] S7. Place the coated copper foil under a 365nm wavelength ultraviolet lamp for 50 minutes to obtain the electrode.

[0035] S8. Finally, place the electrode in a 60℃ oven to dry for 2 hours, then raise the temperature to 80℃ and dry for 2 hours to obtain a UV-curable silicon-carbon anode.

[0036] Comparative Example 1: Comparative Example 1 provides a method for preparing a binder-type silicon-carbon anode, which includes the following steps: (1) Weigh 900mg silicon carbide powder (Carbon One New Energy Group Co., Ltd., model C ONE-SC 1800), 50mg conductive carbon black (Super p), 37.5mg sodium carboxymethyl cellulose (CMC) and 1.25mL deionized water, add them to a ball mill jar and ball mill at 400rpm for 2h; (2) Add 138.9 mg of styrene-butadiene rubber (SBR) to the above ball milling jar and ball mill at 200 rpm for 2 hours.

[0037] (3) Add 1.25 mL of deionized water to the above ball mill jar and ball mill at 300 rpm for 1 h.

[0038] (4) Take out the ball mill jar, put it into the vacuum drying oven to dry and defoam for 1 minute, then put the slurry into a glass bottle with a magnet and stir for 1 minute to avoid precipitation and uneven slurry; coat the slurry on the surface of copper foil to obtain the electrode sheet.

[0039] (5) Finally, the electrode is dried in a 60°C oven for 12 hours to obtain a binder-type silicon-carbon anode.

[0040] Performance Testing and Characterization: I. The UV-curable silicon-carbon anode obtained in Example 1 was subjected to scanning electron microscopy (SEM) using a JEOL JSM-6700F SEM. A 5000x surface SEM image was obtained (see attached image). Figure 2 .from Figure 2 It can be seen that, through the encapsulation of butyl acrylate, the silicon-carbon anode is largely covered by a porous hydrogen-bonded organic framework material, which plays a role in buffering volume expansion and preventing the electrolyte from entering and causing excessive side reactions.

[0041] II. Battery Cycle Performance Test: By assembling lithium-ion batteries, the difference in first-charge performance at 25°C was compared between the UV-cured silicon-carbon anode of Example 2 and the binder-type silicon-carbon anode of Comparative Example 1. The results are as follows: Figure 3As shown in the figure. A comparison reveals that the UV-curable silicon-carbon anode prepared in this embodiment of the invention, due to the elasticity of butyl acrylate, can encapsulate irregularly shaped silicon-carbon particles within the electrode structure, effectively buffering the volume expansion of silicon during battery cycling, thus resulting in a higher first-cycle efficiency. Compared to silicon-carbon anodes prepared using traditional binders, the lithium-ion battery using the UV-curable silicon-carbon anode exhibits a higher first-cycle coulombic efficiency, reaching 88.45%.

[0042] Meanwhile, compared with existing polymerization reactions, the use of photoinitiators and photopolymerization steps in the embodiments of the present invention may reduce chemical waste emissions during the preparation process and improve the environmental friendliness of the process; and the preparation process is more energy-efficient and greener. By using specific photosensitizer responses and molecular templates to limit the polymerization reaction, the thickness and performance of the electrodes can be precisely controlled, and the material properties can be customized.

[0043] In summary, the preparation process of the UV-curable silicon-carbon anode provided in this invention consists of three stages: the first stage is slurry defoaming, the second stage is UV polymerization, and the third stage is gradient drying to remove solvents and moisture. In the first stage, a vacuum oven is used to create a vacuum without heating. In this vacuum environment, air introduced into the slurry due to prolonged stirring can be expelled, resulting in a uniform and smooth coating. The absence of heating prevents excessively high temperatures from causing partial cross-linking of the polymer monomers, which could lead to uneven coating and cracks. In the second stage, UV irradiation allows the photoinitiator in the slurry to rapidly catalyze cross-linking of the polymer monomers, enabling the polymer to fully encapsulate irregularly shaped silicon-carbon particles within the electrode structure. If the irradiation time is too short, the polymer cannot fully cross-link, leading to the volatilization of uncross-linked polymer during subsequent drying and resulting in coating cracks. If the irradiation time is too long, the intense UV light can cause polymer aging, affecting the polymer's elasticity and the degree of coating on the electrode, thus impacting subsequent battery performance. The third stage involves gradient temperature drying to remove solvents and moisture from the coating. Initial low-temperature drying allows the coating to form a crack-free surface with high mechanical strength, suppressing the stress caused by subsequent high-temperature drying. However, if the drying temperature is too low or the drying time is too short, the surface-forming dry film will not protect the coating; if the temperature is too high, the drying rate will be too fast, leading to cracks on the coating surface. The subsequent high-temperature drying after the low-temperature drying allows for further evaporation of solvents and moisture from the coating. If the subsequent drying temperature is too low or the drying time is too short, the removal of solvents and moisture will be insufficient, affecting the adhesion between the coating and the current collector; if the drying temperature is too high, it will also cause polymer denaturation, affecting its mechanical properties and the coating of silicon-carbon particles.

[0044] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification.

Claims

1. A UV-curable silicon-carbon anode material, characterized in that, It comprises the following components by weight: 3-7 parts polymer monomer, 0.16-0.37 parts photoinitiator, 0.52-1.21 parts crosslinking agent, 30-70 parts silicon carbide powder, 0.1-5 parts porous material, and 30-70 parts solvent; wherein the polymer monomer is butyl acrylate; and the porous material is a porous hydrogen-bonded organic framework material.

2. The UV-curable silicon-carbon anode material according to claim 1, characterized in that, The photoinitiator is diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide; the crosslinking agent is polyethylene glycol diacrylate.

3. The UV-curable silicon-carbon anode material according to claim 1, characterized in that, The solvent is N,N-dimethylformamide.

4. The UV-curable silicon-carbon anode material according to claim 1, characterized in that, The method for preparing the porous material includes the following steps: 3,4,9,10-perylenetetracarboxylic dianhydride and dicyandiamide were mixed and added to N,N-dimethylformamide and ethylene glycol to obtain a reaction solution; The reaction solution is heated and reacted, the resulting product is filtered, and then washed and dried to obtain the porous material.

5. The UV-curable silicon-carbon anode material according to claim 4, characterized in that, The mass ratio of 3,4,9,10-perylenetetracarboxylic dianhydride to dicyandiamide is 1:(1.5-2.5).

6. The UV-curable silicon-carbon anode material according to claim 1, characterized in that, The temperature for the heating reaction of the porous material is 180-220℃.

7. A method for preparing a UV-curable silicon-carbon anode material as described in any one of claims 1-6, characterized in that, Includes the following steps: The polymer monomers are mixed with the solvent; Add the photoinitiator dropwise while stirring; Add silicon carbide powder while stirring; Add the porous material while stirring; A crosslinking agent was added dropwise while stirring to obtain a UV-curable silicon-carbon anode material.

8. The application of a UV-curable silicon-carbon anode material as described in any one of claims 1-6 in the preparation of lithium-ion batteries.

9. The application according to claim 8, characterized in that, The lithium-ion battery includes a positive electrode and a negative electrode, and the method for preparing the negative electrode includes the following steps: The UV-curable silicon-carbon anode material is vacuum defoamed and then coated onto the current collector. The current collector coated with the UV-curable silicon-carbon anode material is UV-cured and then subjected to gradient drying to obtain the anode.

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