Lithium-carbon composite tape and its manufacturing method

Abstract

The present invention provides a lithium-carbon composite tape and a manufacturing method thereof. The lithium-carbon composite tape includes a substrate, a metallic lithium intermediate layer located on both sides of the substrate, and a lithium-carbon composite layer located outside the intermediate layer, and the mass fraction of carbon in the lithium-carbon composite layer is 5% to 90%. The substrate layer of the lithium-carbon composite tape provides high-strength tensile performance to the lithium-carbon composite tape, and is suitable for large-scale industrialized production. The metallic lithium intermediate layer tightly bonds the substrate layer and the lithium-carbon composite layer, and the problem of swelling during the preparation of the lithium-carbon composite tape can be avoided. The metallic lithium intermediate layer can effectively reduce the internal resistance of the lithium-carbon composite tape, and the lithium in the intermediate layer is active lithium, which contributes to the battery cycle process and can replenish the consumption of metallic lithium in the lithium-carbon layer. The lithium-carbon composite layer includes a carbon skeleton, which provides a spare space for the deposition of metallic lithium, and can not only suppress the volume change during the metallic lithium cycle process, but also effectively reduce the local current density of the electrode and prevent the formation of lithium dendrites.

Description

[Technical Field]

[0001] The present invention belongs to the field of metallic lithium processing, and particularly relates to a lithium-carbon composite tape and a method for producing the same. [Background technology]

[0002] Metallic lithium has always been a research focus in the field of lithium batteries, as it is a promising anode material with wide application potential in the future. However, pure metallic lithium has problems such as a large volume change during cycling and the tendency to form lithium dendrites, hindering its industrial application.

[0003] To address the issues inherent in pure metallic lithium, other materials have been composited with metallic lithium to obtain composite materials with superior performance and meet the demand for high energy density and long cycle life in lithium batteries. Among these, composites of inexpensive and widely available carbon materials with metallic lithium have been a focus of research. Lithium-carbon composites address electrode volume changes during cycling and suppress the formation of lithium dendrites. However, when carbon materials are added to pure metallic lithium, especially at high carbon content levels, the tensile strength of the lithium-carbon composite decreases, making it difficult to process and adhere to the current collector substrate. To improve the bonding strength between the lithium-carbon composite and the current collector substrate, the composite is typically performed using a high-pressure roll press. However, this often leads to swelling and separation between the current collector and the lithium-carbon composite, resulting in a rapid deterioration in the performance of the lithium-carbon composite during battery cycling and ultimately affecting the cycle life of the battery.

[0004] For these reasons, there is a need for a lithium-carbon composite tape that has high tensile strength and in which the lithium-carbon material is tightly bonded to the substrate. Summary of the Invention

[0005] In response to the above technical challenges, the present invention provides a lithium-carbon composite tape having high tensile strength and in which the lithium-carbon material is tightly bonded to the substrate. In particular, a metallic lithium interlayer is provided between the substrate layer and the lithium-carbon material layer. The substrate layer provides high tensile strength as a lithium-carbon composite tape, while the in-situ bonded metallic lithium interlayer solves the problem of the substrate layer and the lithium-carbon layer not being tightly bonded together, which can easily cause swelling. Furthermore, the presence of the metallic lithium interlayer effectively reduces the internal resistance of the lithium-carbon composite tape. The lithium in this layer is active lithium, which contributes to the battery cycling process and can replenish the metallic lithium consumed in the lithium-carbon material layer.

[0006] In order to achieve the above object of the invention, according to one aspect of the present invention, A conductive substrate; a metallic lithium intermediate layer located on each side of the substrate; a lithium-carbon composite layer located on the outer side of the metal interlayer; Including, The lithium-carbon composite tape includes a porous carbon skeleton and metallic lithium filled in the voids of the porous carbon skeleton, and the mass fraction of carbon in the lithium-carbon composite layer is 5% to 90%, preferably 15% to 65%.

[0007] In some embodiments, the substrate is a metal foil material, an organic polymer film material, an inorganic material film material, or a composite film material of these materials.

[0008] In some embodiments, the metal foil material is a foil material obtained from aluminum, copper, nickel, tin, platinum, gold, silver, iron, lead, titanium, indium, zinc, magnesium, beryllium, tungsten, sodium, antimony, or a combination thereof, such as copper foil, aluminum foil, nickel foil, stainless steel foil, punched copper foil, woven copper mesh, stainless steel mesh, etc.

[0009] In some embodiments, the organic polymer film material is a film material made of a polyolefin, polyester, or a modified polymer containing one or more amino groups, carboxyl groups, hydroxyl groups, imino groups, halogen atoms, sulfonic acid groups, nitrate groups, mercapto groups, phenyl groups, or cyano groups, such as polyethylene film material, polypropylene film material, polyacrylonitrile film material, polyethylene terephthalate film material, and the above film materials with holes.

[0010] In some embodiments, the inorganic material film material includes a film material obtained from an inorganic carbon material, a metal oxide, a metal halide, a metal nitride, a metal sulfide, a metal salt, or a combination thereof, such as a carbon fiber film material, a graphene film material, a carbon nanotube film material, or buckypaper.

[0011] In some embodiments, the composite film material of these materials is a polyacrylonitrile film material with a copper surface plated, a copper foil with an oxide surface plated, a copper mesh with a silver surface plated, or a stainless steel mesh with a lithium surface plated.

[0012] In some embodiments, the thickness of the substrate is 1 micron to 20 microns, and the porosity of the substrate is 0% to 85%, for example, 15% to 85%.

[0013] In some embodiments, the thickness of the metallic lithium intermediate layer is 20 nm to 5 microns, preferably 1 micron to 5 microns.

[0014] In some embodiments, the lithium-carbon layer has a thickness of 1 micron to 200 microns, with a preferred thickness range of 5 microns to 50 microns.

[0015] In some embodiments, the porous carbon skeleton of the lithium-carbon composite material is a mesh-like skeleton formed by entanglement of composite carbon materials and having a lithium affinity modified layer, the composite carbon material including a crystalline carbon material and an amorphous carbon coating layer covering the surface of the crystalline carbon material, and the amorphous carbon coating layer constitutes the lithium affinity modified layer.

[0016] In some embodiments, the crystalline carbon material comprises one or more of carbon nanotubes, graphene, pyrogenic carbon fibers, graphite, soft carbon, hard carbon, mesophase carbon microspheres, and carbon black.

[0017] In some embodiments, the amorphous carbon coating layer is a carbonized product of an organic material blended with a crystalline carbon material, the organic material being selected from the group consisting of an organic binder, an organic filler, and a crosslinker.

[0018] In some embodiments, the thickness of the amorphous carbon coating layer is in the range of 10 nm to 600 nm.

[0019] In some embodiments, the amorphous carbon coating layer further comprises nanometal particles embedded therein or on the surface thereof, and the nanometal particles have a size range of 5 nm to 800 nm.

[0020] In some embodiments, the porous carbon skeleton in the lithium-carbon composite layer has a linear, spherical, sea urchin-like, porous spherical, spherical-like, or flattened structure.

[0021] According to another aspect of the present invention, there is provided a method for producing the above lithium-carbon composite tape, the method being carried out under the protection of an inert gas and comprising the following steps: First step: A pretreatment step of the substrate in which the substrate is subjected to at least one of deoiling, pre-oxidation, plasma spraying, ultrasonic cleaning, and high-temperature treatment. The second step is a metallic lithium intermediate layer preparation step in which a metallic lithium intermediate layer is prepared on the surface of the substrate by roll pressing, doctor blade coating, pressure coating, physical vapor deposition, or electroplating. The third step is the lithium-carbon composite layer preparation step, in which the lithium-carbon composite material is bonded to the metallic lithium intermediate layer by doctor blade coating, pressure coating, and press compounding to obtain a lithium-carbon composite tape.

[0022] In some embodiments, the inert gas includes high-purity argon gas and high-purity helium gas.

[0023] In some embodiments, the lithium-carbon composite material comprises: Step 1: uniformly mixing an organic binder, a filler, a crosslinking agent, and a solvent, the filler including a crystalline carbon material, an organic filler, and an optional inorganic filler; Step 2: Pre-drying the mixture obtained in step 1 by removing the solvent; Step 3: heating the material obtained in step 2 at a temperature in the range of 300°C to 1200°C under the protection of an inert gas atmosphere, and obtaining a porous carbon skeleton after cooling; Step 4 is immersing the porous carbon skeleton obtained in step 3 in molten lithium to obtain a lithium-carbon composite material; It is produced by a method comprising:

[0024] In some embodiments, the mass ratio of the organic binder, filler, crosslinking agent, and solvent is (4 to 15 parts):(10 to 30 parts):(0.01 to 20 parts):(20 to 400 parts).

[0025] In some embodiments, the mass proportion of the crystalline carbon material in the filler is 15% to 100%.

[0026] In some embodiments, the organic binder is selected from the group consisting of polyvinyl alcohol, polyvinylidene fluoride, polybutene styrene, polystyrene, polycarboxylated cellulose, cyanoacrylate, polyacrylic acid, cyclodextrin, cyclic ether derivatives, polyurethane, methacrylate, epoxy resin, vinyl acetate polymer, polyimide, organofluoropolymer, organosiloxane, polyethylene glycol, polyethylene, polyvinyl chloride, polypropylene, glycerin, ethylparaben and its derivatives, and monosaccharide or polysaccharide polymers.

[0027] In some embodiments, the organic filler is selected from the group consisting of plastic particulates (polypropylene, polyethylene terephthalate, polystyrene), benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, calcium propionate, and dehydroacetate.

[0028] In some embodiments, the inorganic filler is selected from the group consisting of metal nanoparticles, metal oxides, metal nitrides, calcium carbonate, hydrous magnesium silicate, mica, hydrated silica, and silica.

[0029] In some embodiments, the crosslinking agent is selected from the group consisting of a high molecular weight polymer in which allyl sucrose or pentaerythritol allyl ether is bonded to acrylic acid, benzoyl peroxide, diethylenetriamine, sodium borate hydrate, cellulose derivatives, and isothiazolinone.

[0030] In some embodiments, the solvent is selected from the group consisting of water, tetrachloroethylene, toluene, turpentine, acetone, methyl acetate, ethyl acetate, pentane, n-hexane, cyclohexane, octane, citralva, ethanol, xylene, toluene, cyclohexanone, isopropanol, ethyl ether, propylene oxide, methylbutanone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, acetonitrile, pyridine, phenol, and ethylenediamine.

[0031] The lithium-carbon composite tape provided by the present invention has at least one of the following advantages: 1. The substrate layer of the lithium-carbon composite tape provides high tensile strength to the lithium-carbon composite tape, making it suitable for large-scale industrial production. 2. The metallic lithium interlayer of the lithium-carbon composite tape tightly bonds the substrate layer and the lithium-carbon layer, thereby avoiding the problem of blistering during the manufacturing process of the lithium-carbon composite tape. 3. The presence of the metallic lithium interlayer can effectively reduce the internal resistance of the lithium-carbon composite tape. Furthermore, the lithium in the metallic lithium interlayer is active lithium, which contributes to the battery cycling process and replenishes the metallic lithium consumed in the lithium-carbon layer. 4. The lithium-carbon composite layer in the lithium-carbon composite tape contains a porous carbon skeleton, which provides extra space for the deposition of metallic lithium, suppresses volume changes during metallic lithium cycling, reduces the local current density of the electrode, and prevents the formation of lithium dendrites. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a schematic structural diagram of one of the lithium-carbon composite tapes according to the present invention. [Figure 2] FIG. 2 shows the lithium-carbon composite tape produced in Example 1. [Figure 3] FIG. 3 shows the lithium-carbon composite tape produced in Example 6. [Figure 4] FIG. 4 shows the lithium-carbon composite tape produced in Example 7. [Figure 5] FIG. 5 shows the lithium-carbon composite tape produced in Example 8. [Figure 6] FIG. 6 shows the lithium-carbon composite tape produced in Example 9. [Figure 7] FIG. 7 shows the lithium-carbon composite tape produced in Comparative Example 2. [Figure 8] FIG. 8 is a cycle graph of the batteries assembled with the materials prepared in Example 1, Comparative Example 2, and Comparative Example 3. DETAILED DESCRIPTION OF THE INVENTION

[0033] In order to clarify the objectives, technical solutions, and advantages of the present invention, the present invention will be described in more detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are merely for the purpose of interpreting the present invention and are not intended to limit the present invention. The technical features of each embodiment of the present invention described below can be combined with each other if they are not inconsistent with each other.

[0034] One typical structure of the lithium-carbon composite tape of the present invention, as shown in FIG. 1, includes a substrate 1, metallic lithium intermediate layers 2, 2' bonded to both sides of the substrate 1, and lithium-carbon composite layers 3, 3' deposited on the metallic lithium intermediate layers. The thicknesses of the metallic lithium intermediate layers 2, 2' on both sides of the substrate 1 may be the same or different, and the methods for forming the metallic lithium intermediate layers may be the same or different. Similarly, the lithium-carbon composite layers 3, 3' on both sides may be the same or different. Preferably, the metallic lithium intermediate layer 2 and the metallic lithium intermediate layer 2' are the same, and the lithium-carbon composite layer 3 and the lithium-carbon composite layer 3' are the same. [Example]

[0035] Example 1 Substrate pretreatment A rotary plasma cleaning machine (Shenzhen Dongxin High-Tech Automation Equipment Co., Ltd.) was used to clean the 6-micron-thick copper foil, obtaining a copper foil substrate with no dust on the surface.

[0036] Preparation of metallic lithium interlayer Physical vapor deposition was used to deposit a layer of metallic lithium with a thickness of 4 microns on the surface of the copper foil. During the physical vapor deposition process, the vacuum level in the cavity was kept at 5.0 × 10 -3 Pa, the cavity temperature was 650°C, and the temperature control accuracy was ±2°C.

[0037] Preparation of lithium-carbon layer Polyvinyl alcohol (Aladdin Reagents (Shanghai) Co., Ltd.), polystyrene microspheres (Suzhou Weimai New Materials Co., Ltd.), carbon nanotubes (Shandong University), diethylenetriamine (Shanghai Yantai Industrial Co., Ltd.), isothiazolinone (Aladdin Reagents (Shanghai) Co., Ltd.), silver nanoparticles, and deionized water were mixed uniformly in a mass ratio of 6:9:9:5:5:2:75.

[0038] The prepared mixture was pre-dried at 85°C for 5 hours. The pre-dried material was placed in a crucible and subjected to high-temperature treatment under an inert gas atmosphere to obtain a carbon skeleton material. The high-temperature treatment temperature was 1000°C for 5 hours. The carbon skeleton material prepared as described above was brought into contact with molten metallic lithium, and the metallic lithium was immersed in the carbon material. After cooling, a lithium-carbon block material with a three-dimensional carbon skeleton was obtained. After turning, roll pressing, and cutting, a lithium-carbon composite tape with a thickness of 50 microns was obtained.

[0039] The lithium-carbon composite tape prepared as described above was pressed (at a pressure of 2 MPa) with copper foil having metallic lithium deposited on its surface by roll pressing to obtain a lithium-carbon composite tape with a thickness of 60 microns. As shown in Figure 2, the lithium-carbon outer layer of the prepared lithium-carbon composite tape was tightly adhered to the copper foil substrate, and the surface of the lithium-carbon layer was flat and not blistered.

[0040] Example 2 Substrate pretreatment A rolled PET (polyethylene terephthalate) film with a thickness of 6 μm was used as the substrate. First, the rolled PET film was dried in a vacuum oven at 80°C for 24 hours.

[0041] Fabrication of the metal interlayer Vacuum deposition equipment (vacuum degree 10 -3 A lithium layer was vapor-deposited on both the top and bottom surfaces of a rolled PET film in a vacuum chamber (at 500°C, 1000 Pa) until the lithium layer was 4 μm thick.

[0042] Preparation of lithium-carbon layer The lithium-carbon tape prepared in Example 1 was combined with a PET film having metallic lithium vapor-deposited on its surface by roll pressing to obtain a lithium-carbon composite tape having a thickness of 60 microns.

[0043] Example 3 The same procedures as in Example 2 were carried out except that the substrate was changed to a polyacrylonitrile film material with a copper-plated surface.

[0044] Example 4 The same procedure as in Example 2 was carried out except that tin tetrachloride was added to the polyacrylonitrile film material.

[0045] Example 5 The substrate was changed to a polyacrylonitrile film material with aluminum oxide coated on the surface, but the other conditions were the same as in Example 2.

[0046] Example 6 As shown in FIG. 3, the substrate was changed to punched copper, but the rest was the same as in Example 1.

[0047] Example 7 As shown in FIG. 4, the substrate was changed to a knitted copper mesh, but the rest was the same as in Example 1.

[0048] Example 8 As shown in FIG. 5, the substrate was changed to a stainless steel mesh, but the rest was the same as in Example 1.

[0049] Example 9 As shown in FIG. 6, the substrate was changed to carbon nanotube paper, but the rest was the same as in Example 1.

[0050] Example 10 The same procedures as in Example 1 were carried out except that the substrate was changed to graphene paper.

[0051] Comparative Example 1 Polyvinyl alcohol (Aladdin Reagents (Shanghai) Co., Ltd.), polystyrene microspheres (Suzhou Weimai New Materials Co., Ltd.), carbon nanotubes (Shandong University), diethylenetriamine (Shanghai Yantai Industrial Co., Ltd.), isothiazolinone (Aladdin Reagents (Shanghai) Co., Ltd.), silver nanoparticles, and deionized water were mixed uniformly in a mass ratio of 6:9:9:5:5:2:75.

[0052] The prepared mixture was pre-dried at 85°C for 5 hours. The pre-dried material was placed in a crucible and subjected to high-temperature treatment under an inert gas atmosphere to obtain a carbon skeleton material. The high-temperature treatment temperature was 1000°C for 5 hours. The carbon skeleton material prepared as described above was brought into contact with molten metallic lithium, and the metallic lithium was immersed in the carbon material. After cooling, a lithium-carbon block material with a three-dimensional carbon skeleton was obtained. After turning, roll pressing, and cutting, a lithium-carbon tape with a thickness of 60 microns was obtained.

[0053] Comparative Example 2 Substrate pretreatment A rotary plasma cleaning machine (Shenzhen Dongxin High-Tech Automation Equipment Co., Ltd.) was used to clean the 6-micron-thick copper foil, obtaining a copper foil substrate with no dust on the surface.

[0054] Preparation of lithium-carbon layer Polyvinyl alcohol (Aladdin Reagents (Shanghai) Co., Ltd.), polystyrene microspheres (Suzhou Weimai New Materials Co., Ltd.), carbon nanotubes (Shandong University), diethylenetriamine (Shanghai Yantai Industrial Co., Ltd.), isothiazolinone (Aladdin Reagents (Shanghai) Co., Ltd.), silver nanoparticles, and deionized water were mixed uniformly in a mass ratio of 6:9:9:5:5:2:75.

[0055] The prepared mixture was pre-dried at 85°C for 5 hours. The pre-dried material was placed in a crucible and subjected to high-temperature treatment under an inert gas atmosphere to obtain a carbon skeleton material. The high-temperature treatment temperature was 1000°C for 5 hours. The carbon skeleton material prepared as described above was brought into contact with molten metallic lithium, and the metallic lithium was immersed in the carbon material. After cooling, a lithium-carbon composite block with a three-dimensional carbon skeleton was obtained. After turning, roll pressing, and cutting, a lithium-carbon composite tape with a thickness of 54 microns was obtained.

[0056] The lithium-carbon composite tape prepared as described above was pressed together with pretreated copper foil using a roll press (pressure of 2 MPa) to obtain a lithium-carbon composite tape with a thickness of 60 microns. As shown in Figure 7, the lithium-carbon composite tape had blisters on the surface, and the lithium-carbon layer and the substrate were not tightly bonded.

[0057] Comparative Example 3 A 50 micron pure lithium tape was roll-pressed to combine it with copper foil having metallic lithium deposited on its surface (pressure: 2 MPa) to obtain a lithium-copper composite tape; the other steps were the same as in Example 1.

[0058] Peel force measurement: Measurement samples measuring 25 mm wide and 150 mm long were prepared using the tape prepared in each example, with five samples per example. TESA 7475 adhesive tape (Desa Adhesive Tape Co., Ltd.) was applied to the measurement surface of the measurement sample and roll-pressed twice using a 2 kg standard roller. Double-sided adhesive tape was applied to the non-measurement surface of the sample, and the sample was fixed to a standard stainless steel plate and prepared for measurement. One end of the adhesive tape was peeled off the stainless steel, and the stainless steel plate was clamped in the lower jig, while the other end of the adhesive tape was clamped in the upper jig. The measurement test was performed at a speed of 30 mm / min and a pulling angle of 180°. The average value of the data measured by pulling the adhesive tape at 180° was recorded as the measurement result.

[0059] Tensile strength measurement Using the tapes produced in each example, measurement samples measuring 25 mm wide and 150 mm long were prepared, with five samples per example. The measurement samples were clamped in a measurement jig, and the measurement test was carried out at a speed of 50 mm / min and a pulling angle of 180°. The maximum tension value during the material fracture process was recorded, and the average value of the maximum tension values ​​was taken to obtain the tensile strength of the material.

[0060] The peel strength and tensile strength values ​​of each of Examples 1 to 10 and Comparative Examples 1 to 3 are shown in the table below. [Table 1]

[0061] As can be seen from Example 1 and Comparative Example 2 in the above table, after forming a metallic lithium intermediate layer on the copper foil substrate, the peel strength of the lithium-carbon composite tape increased from 55 gf / 25 mm to 183 gf / 25 mm, indicating that the intermediate layer can significantly increase the adhesion of the lithium-carbon layer to the copper foil substrate. The tensile test data for Examples 1, 2, 3, 4, and Comparative Example 1 also showed that although the tensile strength of the lithium-carbon tape itself was low at only 45 MPa, after the lithium-carbon tape was roll-pressed onto copper foil or an organic polymer substrate (e.g., polyethylene terephthalate, polyacrylonitrile), the tensile strength of the material significantly increased, meeting the needs of industrial production.

[0062] Button batteries were assembled using the tapes prepared in Example 1, Comparative Example 2, and Comparative Example 3 as the negative electrode and a lithium iron phosphate positive electrode. A Celgard 2500 PP film was used as the separator, and 1M LiPF6, EC:EMC = 3:7 (vol / vol) was used as the electrolyte. Charge and discharge measurements were performed on the assembled button batteries, with the measurement voltage range being 2.2 to 3.8 V and the charge and discharge current being 0.5 C. The measurement graph is shown in Figure 8.

[0063] As can be seen from Figure 8, in Comparative Example 3, the material made from pure metallic lithium rapidly decreased in discharge capacity and reached the end of its life after approximately 85 cycles, whereas the battery assembled with lithium-carbon material significantly extended its cycle life. Comparative Example 2 also used lithium-carbon material, but because the lithium-carbon material was directly composited with the substrate, the bonding between the substrate and the lithium-carbon material was poor, resulting in a decline in the performance of the lithium-carbon material, which may be related to the internal resistance of the material. Poor bonding between the materials increased the internal resistance, accelerating the rate of decline in the battery's cycle life. In contrast, the battery assembled with the material of Example 1 had the longest cycle life.

[0064] In the examples of the present invention, the lithium-carbon particles and the manufacturing method thereof according to the present invention are described in detail by combining specific embodiments, but this is for the purpose of fulfilling legal requirements, and the present invention is not limited to the examples described above. Those skilled in the art can replicate the lithium-carbon particles and the manufacturing method thereof by appropriate operations based on the disclosure and teachings of the specification.

[0065] Based on the disclosure and teachings of the above specification, a person skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments shown and described above, and any modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. Although some specific terms are used in this specification, these terms are used for the convenience of explanation and do not limit the present invention in any way.

Claims

1. A substrate, a metallic lithium intermediate layer located on at least one side of the substrate; a lithium-carbon composite layer positioned outside the metallic lithium intermediate layer; The lithium-carbon composite material includes a porous carbon skeleton and metallic lithium filled in the voids of the porous carbon skeleton, The mass fraction of carbon in the lithium-carbon composite layer is 5% to 90%. A lithium-carbon composite tape.

2. 2. The lithium-carbon composite tape according to claim 1, wherein the substrate is a metal foil, an organic polymer film, an inorganic film, or a composite film of these materials.

3. the metal foil material is a foil material obtained from aluminum, copper, nickel, tin, platinum, gold, silver, iron, lead, titanium, indium, zinc, magnesium, beryllium, tungsten, sodium, antimony, or a combination thereof; the organic polymer film material is a film material made of polyolefin, polyester, or a modified polymer containing one or more of an amino group, a carboxyl group, a hydroxyl group, an imino group, a halogen element, a sulfonic acid group, a nitrate group, a mercapto group, a phenyl group, and a cyano group; The inorganic material film material includes a film material obtained from an inorganic carbon material, a metal oxide, a metal halide, a metal nitride, a metal sulfide, a metal salt, or a combination thereof; The composite film materials of these materials include polyacrylonitrile film materials with copper plating on the surface, copper foil with oxide plating on the surface, copper mesh with silver plating on the surface, and stainless steel mesh with lithium plating on the surface. The lithium-carbon composite tape according to claim 2 .

4. 2. The lithium-carbon composite tape according to claim 1, wherein the lithium-carbon composite tape satisfies at least one of the following requirements: Requirement (1): The thickness of the substrate is 1 micron to 20 microns, and the porosity of the substrate is 0% to 85%. Requirement (2): The thickness of the metallic lithium intermediate layer is 20 nanometers to 5 microns. Requirement (3): The thickness of the lithium-carbon composite material layer is 1 micron to 200 microns.

5. 2. The lithium-carbon composite tape according to claim 1, wherein the porous carbon skeleton of the lithium-carbon composite material is a mesh-like skeleton formed by entanglement of composite carbon materials and having a lithium affinity modified layer, the composite carbon material including a crystalline carbon material and an amorphous carbon coating layer covering the surface of the crystalline carbon material, and the amorphous carbon coating layer constitutes the lithium affinity modified layer.

6. the crystalline carbon material comprises one or more of carbon nanotubes, graphene, pyrolytic carbon fiber, graphite, soft carbon, hard carbon, mesophase carbon microspheres, and carbon black; the amorphous carbon coating layer is a carbonized product of an organic material blended with a crystalline carbon material, the organic material being selected from the group consisting of an organic binder, an organic filler, and a cross-linking agent; The thickness of the amorphous carbon coating layer is in the range of 10 nm to 600 nm.

6. The lithium-carbon composite tape according to claim 5.

7. The lithium-carbon composite tape according to claim 5, wherein the amorphous carbon coating layer further comprises nano-metal particles embedded therein or on the surface thereof, and the nano-metal particles have a size range of 5 nm to 800 nm.

8. 2. The lithium-carbon composite tape according to claim 1, wherein the porous carbon skeleton in the lithium-carbon composite material layer has a linear, spherical, sea urchin-like, porous spherical, near-spherical, or flat structure.

9. 2. The lithium-carbon composite tape according to claim 1, wherein the mass fraction of carbon in the lithium-carbon composite layer is 15% to 65%.

10. A method for producing the lithium-carbon composite tape according to claim 1, comprising the steps of: The method is carried out under inert gas protection and comprises the following steps: First step: a pretreatment step of the substrate, which involves subjecting the substrate to at least one of deoiling, pre-oxidation, plasma spraying, ultrasonic cleaning, and high-temperature treatment; A second step: a metallic lithium intermediate layer preparation step of preparing a metallic lithium intermediate layer on the surface of the substrate by a method such as roll pressing, doctor blade coating, pressure coating, physical vapor deposition, electroplating, or thermal evaporation; The third step is a lithium-carbon composite layer preparation step in which the lithium-carbon composite material is bonded to the metallic lithium intermediate layer by doctor blade coating, pressure coating, and press compounding to obtain a lithium-carbon composite tape.

11. The manufacturing method according to claim 10, wherein the inert gas includes argon gas and helium gas.

12. The lithium-carbon composite material is Step 1: uniformly mixing an organic binder, a filler, a crosslinking agent, and a solvent, the filler including a crystalline carbon material, an organic filler, and an optional inorganic filler; Step 2: Pre-drying the mixture obtained in step 1 by removing the solvent; Step 3: heating the material obtained in step 2 at a temperature in the range of 300°C to 1200°C under the protection of an inert gas atmosphere, and obtaining a porous carbon skeleton after cooling; Step 4, in which the porous carbon skeleton obtained in step 3 is immersed in molten lithium to obtain a lithium-carbon composite material; and provided that the mass ratio of the organic binder, filler, crosslinking agent, and solvent is 4 to 15 parts: 10 to 30 parts: 0.01 to 20 parts: 20 to 400 parts; The mass ratio of the crystalline carbon material in the filler is 15% to 100%; the organic binder is selected from the group consisting of polyvinyl alcohol, polyvinylidene fluoride, polybutene styrene, polystyrene, polycarboxylated cellulose, cyanoacrylate, polyacrylic acid, cyclodextrin, cyclic ether derivatives, polyurethane, methacrylate, epoxy resin, vinyl acetate polymer, polyimide, organofluoropolymer, organosiloxane, polyethylene glycol, polyethylene, polyvinyl chloride, polypropylene, glycerin, ethylparaben and its derivatives, monosaccharide or polysaccharide polymers, the organic filler is selected from the group consisting of plastic fine particles, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, calcium propionate, and dehydroacetate; the inorganic filler is selected from the group consisting of metal nanoparticles, metal oxides, metal nitrides, calcium carbonate, hydrous magnesium silicate, mica, hydrated silica, and silica; the crosslinking agent is selected from the group consisting of a polymer in which allyl sucrose or pentaerythritol allyl ether is bound to acrylic acid, benzoyl peroxide, diethylenetriamine, sodium borate hydrate, a cellulose derivative, and isothiazolinone; 11. The method according to claim 10, wherein the solvent is selected from the group consisting of water, tetrachloroethylene, toluene, turpentine oil, acetone, methyl acetate, ethyl acetate, pentane, n-hexane, cyclohexane, octane, citralva, ethanol, xylene, toluene, cyclohexanone, isopropanol, ethyl ether, propylene oxide, methylbutanone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, acetonitrile, pyridine, phenol, and ethylenediamine.

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