Method for recovering negative electrode materials from discarded lithium batteries and adding copper oxide to make functional graphene masterbatch

Abstract

A method for recycling negative electrode materials from waste lithium-ion batteries and converting them into functional graphene masterbatches by adding copper oxide involves disassembling the waste lithium-ion batteries, manually or mechanically crushing them, and then obtaining the internal negative electrode materials through washing, dehydration, drying, and sieving. These negative electrode materials are ordinary carbon powder, which is essentially artificial graphite with a carbon content of over 99%. The graphene is then processed through sintering, NMP ultrasonic cleaning, wet grinding, dehydration, and drying. Compared to traditional methods, this process does not require a large amount of energy to obtain single-layer and multi-layer graphene products. This process reduces the particle size of the graphene to between 1µm (single micrometer) and 0.01µm (nanometer), and then combines it with high-plasticity molecules and copper oxide of 1µm (single micrometer) to 0.01µm (nanometer) size using a melt-mixing method. This method does not require the addition of functional groups as connecting bonds. Unlike other graphene masterbatches that incorporate functional groups, carbon black, resins, etc., this technology uses only single-micron to nano-sized particles to fully melt, mix, and uniformly disperse them within high-plasticity molecules, ensuring consistent uniformity to form functional graphene masterbatches.

Description

Technical Field

[0001] This invention relates to waste lithium battery recycling technology, specifically a method for recycling negative electrode materials from waste lithium series batteries and adding copper oxide to convert them into functional graphene masterbatch. Prior Technology

[0002] Current methods for producing graphene include mechanical exfoliation, chemical vapor deposition, and chemical reduction.

[0003] The mechanical exfoliation method involves gradually peeling away the graphite layer until only one layer of graphene remains. The graphene produced by the mechanical exfoliation method is of high quality but has limited production volume, making it suitable for laboratory research.

[0004] Chemical vapor deposition (CVD) is a method that deposits a single layer of graphene onto the surface of a metal substrate using a source gas at high temperatures. It is suitable for large-scale production in industrial applications.

[0005] The advantage of preparing graphene by chemical reduction is that it is low in cost, but the quality is relatively low and it does not meet the requirements for high-quality applications.

[0006] Waste lithium batteries contain materials such as carbon powder. If these materials can be recycled and made into graphene masterbatch, waste resources can be effectively utilized, reducing the original cost of graphene development and production. Summary of the Invention

[0007] The main objective of this invention is to provide a method for recycling negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch. After disassembling the waste lithium-ion batteries and removing the battery casing, the obtained artificial graphite is processed through a physical process to obtain single-layer and multi-layer graphene. This graphene is then mixed with copper oxide and combined with plastic polymers to form functional graphene masterbatch.

[0008] Therefore, the manufacturing process of this invention is as follows:

[0009] Step 1: Collect waste lithium batteries;

[0010] Step 2: Physically decompose the waste lithium-ion batteries;

[0011] Step 3: Obtain the negative electrode roll (sheet);

[0012] Step 4: Wash the negative electrode roll (plate) with water to separate the carbon powder from the copper foil of the negative electrode roll (plate);

[0013] Step 5: Dehydrate the toner from Step 4, allowing water molecules to separate from the toner through centrifugal rotation;

[0014] Step 6: Dry the dehydrated toner from Step 5 and reduce the moisture content to below 5%;

[0015] Step 7: Sift the dried carbon powder through a sieve to remove residual impurities and debris, thereby obtaining artificial graphite;

[0016] Step 8: Place the artificial graphite obtained in Step 7 into a high-temperature furnace and calcine it at 600°C. The calcine time is adjusted according to the amount of artificial graphite added, so as to remove impurities from the artificial graphite.

[0017] Step 9: Place the calcined artificial graphite from Step 8 into N-methylpyrrolidone (NMP) for ultrasonic cleaning;

[0018] Step 10: The artificial graphite cleaned by NMP ultrasound in Step 9 is put into a ball mill for wet grinding. The grinding time is between 10 and 30 minutes to obtain single-layer graphene liquid and multi-layer graphene liquid.

[0019] Step 11: Place the single-layer graphene liquid and multi-layer graphene liquid from Step 10 into a centrifuge for dehydration. After removing them from the centrifuge, you will obtain single-layer graphene and multi-layer graphene containing 10 to 20% water.

[0020] Step 12: Dry the single-layer graphene and multi-layer graphene obtained in Step 11 to reduce their moisture content to below 5%, thereby obtaining dried single-layer graphene and dried multi-layer graphene;

[0021] Step 13: The dried single-layer graphene and dried multi-layer graphene from Step 12 are added to a mixer and mixed with copper oxide powder to obtain a graphene-copper oxide mixture;

[0022] Step 14: Combine the graphene-copper oxide mixture obtained in Step 13 with plastic masterbatch, melt-blend through an extruder, and then extrude to form graphene masterbatch;

[0023] Step 15: The graphene masterbatch obtained in step 14 is cooled by water bath or air cooling and then cut into uniform small particles by a pelletizer.

[0024] In an embodiment of the present invention, step 5, the dehydration process, involves using a centrifuge to dehydrate the toner. Initially, the centrifuge speed is set at 200 rpm for 1 minute, then increased to 400 rpm for 3 minutes, then further increased to 800 rpm for 3 minutes, and finally increased to 1300 rpm for 5 minutes. The toner is then removed from the centrifuge to obtain slightly moist toner containing 10-20% moisture.

[0025] In an embodiment of the present invention, the drying method in step 6 of the drying process is natural drying, or low-temperature drying at 45°C to 55°C, or high-temperature drying at 90°C to 120°C.

[0026] In an embodiment of the present invention, in step 7 of the sieving process, a 200 to 300 mesh sieve is used for sieving, and the particle size of the artificial graphite obtained is 48 μm to 75 μm, and the carbon content of the artificial graphite is between 95% and 99%.

[0027] In an embodiment of the present invention, in step 9, artificial graphite is placed in a 70 to 90% NMP solution, the oscillation frequency of the ultrasonic cleaner is set to 37 kHz to 40 kHz, and the oscillation time is 5 to 8 hours.

[0028] In an embodiment of the present invention, the monolayer graphene solution obtained in step 10 is subjected to wavelength detection by a UV spectrometer, and the wavelength falls between 264 and 266 nm.

[0029] In an embodiment of the present invention, in step 11, the centrifuge initially sets the centrifugation speed to 200 rpm / 1 minute, then increases it to 400 rpm / 3 minutes, then continues to increase the speed to 800 rpm / 3 minutes, and finally increases it to 1300 rpm / 5 minutes. Finally, the centrifuge is removed to obtain slightly moist toner containing 10-20% moisture.

[0030] In an embodiment of the present invention, the drying method in step 12 is natural drying, or low-temperature drying at 45°C to 55°C, or high-temperature drying at 90°C to 120°C.

[0031] In an embodiment of the present invention, the ratio of graphene to copper oxide in step 13 is 1:1, 1:3, or 3:1.

[0032] In an embodiment of the present invention, after step 13, a dispersant can be added to the mixture of graphene and copper oxide. The dispersant is selected from polyvinyl alcohol (PVA) or polyvinylpyrrolidone (PVP) to improve the dispersibility of graphene and copper oxide in the polymer.

[0033] In the aforementioned embodiments, antioxidants, stabilizers, and other additives can be added to improve the durability of the masterbatch.

[0034] In an embodiment of the present invention, in step 14, the plastic masterbatch may be polypropylene (PP), or polyethylene (PE), or polyester (PET), or polycarbonate (PC), or polystyrene (PS), or polyamide (PA, nylon), or thermoplastic polyurethane (TPU), or polymethyl methacrylate (PMMA), or polytetrafluoroethylene (PTFE, Teflon), or polyphenylene sulfide (PPS), or polyether ether ketone (PEEK), or liquid crystal polymer (LCP), or polyetherimide (PEI), or polybenzimidazole (PBI), or thermoplastic vulcanizate (TPV), or thermoplastic vulcanizate (TPV).

[0035] In an embodiment of the present invention, in step 14, graphene masterbatch is used in the field of conductivity, and its proportion is 3% graphene + 1% copper oxide + 96% plastic masterbatch.

[0036] In an embodiment of the present invention, in step 14, graphene masterbatch is used in the antibacterial field, and its proportion is 1% graphene + 3% copper oxide + 96% plastic masterbatch.

[0037] In an embodiment of the present invention, in step 14, graphene masterbatch is used in the field of comprehensive performance, and its proportion is 2% graphene + 2% copper oxide + 96% plastic masterbatch.

[0038] Based on the above description, the features and effects of this invention are briefly summarized as follows: This invention involves disassembling and processing waste lithium batteries, followed by manual or mechanical crushing, and then obtaining the internal negative electrode material through washing, dehydration, drying, and sieving. This negative electrode material is ordinary carbon powder, which is essentially artificial graphite with a carbon content of over 99%. It then undergoes sintering, NMP ultrasonic cleaning, wet grinding, dehydration, and drying processes. Compared to traditional methods, this process does not require a large amount of energy to obtain single-layer and multi-layer graphene products. This processing method reduces the particle size of the graphene to between 1µm (single micrometer) and 0.01µm (nanometer), and combines it with high-plasticity molecules and copper oxide of 1µm (single micrometer) to 0.01µm (nanometer) size using a melt-mixing method. This method does not require the addition of functional groups as connecting bonds. Unlike other graphene masterbatches that incorporate functional groups, carbon black, resins, etc., this technology uses only single-micron to nano-sized particles to fully melt, mix, and uniformly disperse them within high-plasticity molecules, ensuring consistent uniformity to form functional graphene masterbatches. Simple Explanation of the Diagram

[0039] Figure 1: Flowchart of the present invention. Figure 2: System diagram of the present invention. Implementation

[0040] As shown in Figures 1 and 2, the present invention provides a method for recycling negative electrode materials from waste lithium-ion batteries and converting them into functional graphene masterbatches by adding copper oxide. The method includes:

[0041] Step 1 (S1): Collect waste lithium series batteries. The aforementioned lithium series batteries include, but are not limited to, the following types: lithium metal batteries, lithium-ion batteries, lithium polymer batteries, lithium titanate batteries, lithium ternary batteries, lithium iron phosphate batteries, lithium titanium batteries, and solid-state lithium batteries. Classify them according to each type of lithium series battery in order to collect precious metal materials other than carbon powder.

[0042] Step 2 (S2): Physically decompose the waste lithium series batteries. The aforementioned physical decomposition process can be carried out by physical crusher A1. The crushing method of the aforementioned physical crusher can be general cutting, laser cutting, or mechanical crushing.

[0043] Step 3 (S3): Obtain the negative electrode roll (plate).

[0044] Step 4 (S4): As shown in Figure 1, the negative electrode roll (plate) is washed with water using a water jet cleaner A2 to separate the carbon powder from the copper foil of the negative electrode roll (plate). The carbon powder is in a wet state at this time.

[0045] Step 5 (S5): As shown in Figures 1 and 4, the toner from Step 4 is dehydrated, so that water molecules are separated from the toner by centrifugal rotation. In this state, the toner may be in a clump or a peelable sheet state. In Step 5, centrifuge A3 is used to dehydrate the toner. The centrifuge speed is initially set at 200 rpm / 1 minute, then increased to 400 rpm / 3 minutes, then further increased to 800 rpm / 3 minutes, and finally increased to 1300 rpm / 5 minutes. Finally, the toner is removed from the centrifuge to obtain slightly moist toner containing 10-20% moisture.

[0046] Step 6 (S6): Dry the dehydrated toner from Step 5 and reduce the moisture content to below 5%; wherein, the drying method in the drying process is natural drying by sun exposure for 7 to 15 days, or drying in dryer A4 at a low temperature of 45°C to 55°C, or drying in dryer at a high temperature of 90°C to 120°C.

[0047] Step 7 (S7): The dried toner powder is sieved using a screening machine A5. The screening machine A5 uses a sieve to remove residual impurities and debris, thereby obtaining high-purity artificial graphite. In the sieving process, a sieve with a mesh size of 200 to 300 is used for sieving, and the particle size of the obtained high-purity toner powder is 48 μm to 75 μm, and the carbon content of the artificial graphite is between 95% and 99%. In addition, the dried toner powder can be placed in a vibrating machine to separate impurities, metals and other substances by vibration and shaking.

[0048] Step 8 (S8): As shown in Figure 1, the artificial graphite from step 7 (S7) is placed in high-temperature furnace A6 for calcination to remove impurities; wherein, the calcination temperature in high-temperature furnace A6 in step 8 (S8) is set at 600℃, and the calcination time must exceed 30 minutes to remove general impurities.

[0049] Step 9 (S9): As shown in Figures 1 and 2, place the calcined artificial graphite from Step 8 (S8) into an ultrasonic cleaner A7, and add N-methylpyrrolidone (NMP solution) for ultrasonic cleaning and oscillation. The specific parameters are as follows: immerse the artificial graphite in a 70-90% NMP solution, with an NMP solution concentration of 80% being optimal, and use the ultrasonic cleaner A7 for cleaning. The ultrasonic oscillation frequency is 37KHz-40KHz, with the optimal frequency being 37KHz, and the oscillation time is adjusted to more than 8 hours.

[0050] Step 10 (S10): As shown in Figures 1 and 2, the artificial graphite cleaned by NMP ultrasonic in step 9 (S9) is put into ball mill A8 for wet grinding. The grinding time is between 10 and 30 minutes to obtain single-layer graphene liquid and multi-layer graphene liquid. The single-layer graphene solution and multi-layer graphene liquid are subjected to wavelength detection by a UV spectrometer, and the wavelength falls between 264 and 266 nm.

[0051] Step 11 (S11): As shown in Figures 1 and 2, the single-layer graphene liquid and multi-layer graphene liquid from step 10 (S10) are placed in centrifuge A3 for dehydration. After being removed from centrifuge A3, single-layer graphene and multi-layer graphene containing 10 to 20% moisture are obtained. The centrifuge speed of centrifuge A3 is initially set at 200 rpm / 1 minute, then increased to 400 rpm / 3 minutes, then further increased to 800 rpm / 3 minutes, and finally increased to 1300 rpm / 5 minutes. Finally, the centrifuge A3 is removed to obtain slightly moist toner containing 10 to 20% moisture.

[0052] Step 12 (S12): As shown in Figures 1 and 2, the single-layer graphene and multi-layer graphene from Step 11 (S11) are dried to reduce their moisture content to below 5%, resulting in dried single-layer graphene and dried multi-layer graphene. In Step 12 (S12), the drying method is natural drying, or drying at a low temperature of 45°C to 55°C using dryer A4, or drying at a high temperature of 90°C to 120°C using dryer A4.

[0053] Step 13 (S13): As shown in Figures 1 and 2, the dried single-layer graphene and dried multi-layer graphene from step 12 (S12) are mixed with copper oxide powder in mixer A9 to obtain a graphene-copper oxide mixture; the ratio of graphene to copper oxide is 1:1, 1:3, or 3:1.

[0054] Step 14 (S14): As shown in Figures 1 and 2, the graphene-copper oxide mixture obtained in step 13 (S13) is combined with plastic masterbatch and melt-blended through an extruder A10 to form graphene masterbatch by extrusion. The plastic masterbatch can be made of polypropylene (PP), polyethylene (PE), polyester (PET), polycarbonate (PC), polystyrene (PS), polyamide (PA, nylon), thermoplastic polyurethane (TPU), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE, Teflon), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polyetherimide (PEI), polybenzimidazole (PBI), thermoplastic vulcanizate (TPV), or thermoplastic vulcanizate (TPV). In step 14, the graphene masterbatch is used in the conductive field, and its ratio is 3% graphene + 1% copper oxide + 96% plastic masterbatch. Alternatively, graphene masterbatch can be used in the antibacterial field, with a ratio of 1% graphene + 3% copper oxide + 96% plastic masterbatch. Or, graphene masterbatch can be used in the comprehensive performance field, with a ratio of 2% graphene + 2% copper oxide + 96% plastic masterbatch.

[0055] In addition, to improve the mixing effect of the graphene-copper oxide mixture with the plastic masterbatch, a dispersant is added to the graphene and copper oxide mixture. The dispersant is typically polyvinyl alcohol (PVA) or polyvinylpyrrolidone (PVP) to improve the dispersibility of graphene and copper oxide in the polymer. Antioxidants, stabilizers, and other additives can also be added to enhance the durability of the masterbatch.

[0056] Step 15 (S15): The graphene masterbatch obtained in step 14 (S14) is cooled by water bath or air cooling and then cut into uniform small particles by pelletizer A11.

[0057] Accordingly, this invention involves dismantling and processing waste lithium batteries, followed by manual or mechanical crushing, and then obtaining the internal negative electrode material through washing, dehydration, drying, and sieving. This negative electrode material is essentially ordinary carbon powder, mostly artificial graphite with a carbon content of over 99%. It then undergoes sintering, NMP ultrasonic cleaning, wet grinding, dehydration, and drying processes. Compared to traditional methods, this process does not require a large amount of energy to obtain single-layer and multi-layer graphene products. This processing reduces the particle size of the graphene to between 1µm (single micrometer) and 0.01µm (nanometer), and combines it with high-plasticity molecules and copper oxide of 1µm (single micrometer) to 0.01µm (nanometer) size using a melt-mixing method. This method does not require the addition of functional groups as connecting bonds. Unlike other graphene masterbatches that incorporate functional groups, carbon black, resins, etc., this technology uses only single-micron to nano-sized particles to fully melt, mix, and uniformly disperse them within high-plasticity molecules, ensuring consistent uniformity to form functional graphene masterbatches.

[0058] In conclusion, the manufacturing system of this invention has not been seen in any books or publications or publicly used, and it truly meets the requirements for an invention patent application. We earnestly request your esteemed authority to review this matter and grant the patent as soon as possible. We are deeply grateful for your consideration.

[0059] It should be noted that the above description is a specific embodiment of the present invention and the technical principles used. Any changes made according to the concept of the present invention, if the resulting functions do not exceed the spirit covered by the specification and drawings, should be within the scope of the present invention and are hereby stated.

[0060] (S1): Step 1 (S2): Step 2 (S3): Step 3 (S4): Step 4 (S5): Step 5 (S6): Step 6 (S7): Step 7 (S8): Step 8 (S9): Step 9 (S10): Step 10 (S11): Step 11 (S12): Step 12 (S13): Step 13 (S14): Step 14 (S15): Step 15 A1: Physical crusher A2: Water Flow Cleaning Machine A3: Centrifuge A4: Dryer A5: Screening machine A6: High-temperature furnace A7: Ultrasonic Cleaner A8: Ball mill A9: Mixer A10: Extruder A11: Pelletizer

Claims

1. A method for recovering negative electrode material from waste lithium-ion batteries and converting it into functional graphene masterbatch by adding copper oxide, comprising: Step 1: collecting waste lithium-ion batteries; Step 2: physically decomposing the waste lithium-ion batteries; Step 3: obtaining negative electrode rolls (sheets); Step 4: washing the negative electrode rolls (sheets) with water to separate carbon powder from the copper foil of the negative electrode rolls (sheets); Step 5: dehydrating the carbon powder in Step 4, so that water molecules are separated from the carbon powder by centrifugal rotation; Step 6: drying the carbon powder after dehydration in Step 5, and reducing the moisture content to below 5%; Step 7: sieving the dried carbon powder through a sieve to remove residual impurities and debris, thereby obtaining artificial graphite; Step 8: placing the artificial graphite obtained in Step 7 into a high-temperature furnace for high-temperature calcination at 600°C, the calcination time being adjusted according to the amount of artificial graphite added, so as to remove impurities from the artificial graphite; Step 9: Place the calcined artificial graphite from Step 8 into N-methylpyrrolidone (NMP) for ultrasonic cleaning; Step 10: Place the NMP-cleaned artificial graphite from Step 9 into a ball mill for wet grinding for 10 to 30 minutes to obtain single-layer graphene liquid and multi-layer graphene liquid; Step 11: Place the single-layer graphene liquid and multi-layer graphene liquid from Step 10 into a centrifuge for dehydration. After removing them from the centrifuge, single-layer graphene and multi-layer graphene containing 10 to 20% moisture are obtained; Step 12: Dry the single-layer graphene and multi-layer graphene from Step 11 to reduce their moisture content to below 5% to obtain dried single-layer graphene and dried multi-layer graphene; Step 13: Mix the dried single-layer graphene and dried multi-layer graphene from Step 12 with copper oxide powder in a mixer to obtain a graphene-copper oxide mixture. Step 14: Combine the graphene-copper oxide mixture obtained in Step 13 with plastic masterbatch, melt and mix it through an extruder, and form graphene masterbatch by extrusion; and Step 15: Cool the graphene masterbatch obtained in Step 14 by means of water bath cooling and air cooling, and cut it into uniform small particles by a pelletizer.

2. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, Step 5, the dehydration process, involves using a centrifuge to dehydrate the toner. Initially, the centrifuge speed is set at 200 rpm for 1 minute, then increased to 400 rpm for 3 minutes, then further increased to 800 rpm for 3 minutes, and finally increased to 1300 rpm for 5 minutes. The toner is then removed from the centrifuge to obtain slightly moist toner containing 10-20% moisture.

3. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, The drying methods in step 6 include natural drying, low-temperature drying at 45°C to 55°C, and high-temperature drying at 90°C to 120°C.

4. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 7, the aforementioned sieve is a 200 to 300 mesh sieve, and the particle size of the artificial graphite obtained is between 48 μm and 75 μm, and the carbon content of the artificial graphite is between 95% and 99%.

5. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 9, artificial graphite is placed in a 70 to 90% NMP solution, and the oscillation frequency of the ultrasonic cleaner is set to 37 kHz to 40 kHz for 5 to 8 hours.

6. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, The monolayer graphene solution obtained in step 10 was subjected to wavelength detection using a UV spectrometer, and the wavelength fell between 264 and 266 nm.

7. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 11, the centrifuge speed is initially set at 200 rpm / 1 minute, then increased to 400 rpm / 3 minutes, then further increased to 800 rpm / 3 minutes, and finally increased to 1300 rpm / 5 minutes. The centrifuge is then removed to obtain slightly moist toner containing 10-20% moisture.

8. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, The drying methods in step 12 include natural drying, drying at a low temperature of 45°C to 55°C using a dryer, and drying at a high temperature of 90°C to 120°C using a dryer.

9. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, Step 13 The ratio of graphene to copper oxide includes 1:1, 1:3, and 3:

1.

10. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, After step 13, a dispersant can be added to the graphene and copper oxide mixture. The dispersant can be polyvinyl alcohol (PVA) or polyvinylpyrrolidone (PVP) to improve the dispersibility of graphene and copper oxide in the polymer.

11. The method for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, as described in claim 10, wherein, Furthermore, antioxidants, stabilizers, and other additives can be added to improve the durability of the masterbatch.

12. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 14, the plastic masterbatch may include polypropylene (PP), polyethylene (PE), polyester (PET), polycarbonate (PC), polystyrene (PS), polyamide (PA, nylon), thermoplastic polyurethane (TPU), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE, Teflon), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polyetherimide (PEI), polybenzimidazole (PBI), thermoplastic vulcanizate (TPV), and thermoplastic vulcanizate (TPV).

13. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 14, the graphene masterbatch is used in the field of conductivity, and its proportion is 3% graphene + 1% copper oxide + 96% plastic masterbatch.

14. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 14, the graphene masterbatch is used in the antibacterial field, with a ratio of 1% graphene + 3% copper oxide + 96% plastic masterbatch.

15. The method described in claim 1 for recovering negative electrode materials from waste lithium-ion batteries and adding copper oxide to convert them into functional graphene masterbatch, wherein, In step 14, the graphene masterbatch is used in the application of conductive or antibacterial plastic composite materials, with a ratio of 2% graphene + 2% copper oxide + 96% plastic masterbatch.

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