Lithium-ion battery material recycling system and method

Abstract

This disclosure relates to the field of lithium-ion battery technology, and more particularly to a lithium-ion battery material recycling system and method. The lithium-ion battery material recycling system provided in this disclosure includes: a gasification furnace, a plasma generator, and a feeder; the gasification furnace has a material outlet and a gas outlet; the input end of the plasma generator is connected to a steam generator for conveying water vapor; the gas outlet of the plasma generator is connected to the gasification furnace, and the plasma generator is used to convert water vapor into plasma and transport it into the gasification furnace; the feeder is disposed in the gasification furnace and is used to place the positive electrode material at a distance from the outlet of the plasma generator. This disclosure utilizes the high-temperature characteristics of water vapor to effectively decompose the binder into a gaseous state and peel it off from the metal, preventing it from mixing with the metal.

Description

Technical Field

[0001] This disclosure relates to the field of lithium-ion battery technology, and in particular to a lithium-ion battery material recycling system and method. Background Technology

[0002] The huge market demand for lithium-ion batteries will lead to a large number of waste batteries in the future. How to handle these waste lithium-ion batteries to mitigate their environmental impact is an urgent problem to be solved. On the other hand, to meet the huge market demand, manufacturers need to produce a large number of lithium-ion batteries to supply the market. Currently, the cathode materials for producing lithium-ion batteries mainly include lithium cobalt oxide, lithium manganese oxide, ternary materials such as nickel-cobalt-manganese oxide, and lithium iron phosphate. Therefore, waste lithium-ion batteries contain a lot of metal resources such as cobalt (Co), lithium (Li), nickel (Ni), manganese (Mn), copper (Cu), and iron (Fe), including many rare metal resources. Cobalt is a scarce strategic metal in my country, and the country mainly meets its growing demand through imports.

[0003] Traditional recycling methods such as high-temperature pyrolysis and biological methods require long processing cycles and can no longer meet the needs. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a lithium-ion battery material recycling system and method.

[0005] The first aspect of this disclosure provides a lithium-ion battery material recycling system, including: a gasifier, a plasma generator, and a feeder;

[0006] The gasifier is equipped with a material outlet and a gas outlet;

[0007] The input end of the plasma generator is connected to a steam generator for conveying water vapor.

[0008] The outlet of the plasma generator is connected to the gasification furnace, and the plasma generator is used to convert water vapor into plasma and transport it into the gasification furnace.

[0009] The feeder is located in the gasification furnace and is used to place the positive electrode material at the outlet of the plasma generator.

[0010] Furthermore, the lithium-ion battery material recycling system also includes a scrubber and a demister;

[0011] The gasifier's outlet is connected to the scrubber via a first conveying pipe, the scrubber's outlet is connected to the demister's inlet via a second conveying pipe, the scrubber's outlet is connected to the demister's inlet via a third conveying pipe, the demister's outlet is connected to an outlet pipe, and the outlet pipe has an outlet.

[0012] Furthermore, a condenser is provided between the gas outlet of the gasifier and the scrubber. The condenser is connected to the gasifier and the scrubber respectively through a first conveying pipe. The gas outlet of the scrubber is connected to the gas inlet of the demister through a second conveying pipe. The gas outlet of the scrubber is connected to the gas inlet of the demister through a third conveying pipe. The gas outlet of the demister is connected to the gas outlet pipe.

[0013] Furthermore, both the exhaust pipe and the discharge pipe are equipped with exhaust gas detection mechanisms.

[0014] Furthermore, both the air outlet pipe and the material outlet pipe are connected to the exhaust pipe.

[0015] Furthermore, the washer includes a washing nozzle, which is disposed above the first conveying pipe and can spray washing liquid into the gas to be washed in the first conveying pipe.

[0016] Furthermore, the gasifier is equipped with a plurality of plasma generators, which are evenly spaced along the circumference of the gasifier.

[0017] Furthermore, the plasma generator includes a cathode assembly, an anode, and an intake ring arranged coaxially;

[0018] The cathode assembly includes a cathode, a hollow housing, and a feed rod;

[0019] A discharge chamber is formed between the first end of the housing and the anode. The air inlet ring is used to supply working gas to the discharge chamber. The anode is provided with an arc flame outlet that communicates with the discharge chamber.

[0020] The first end of the feed rod is inserted into the interior of the housing from the second end of the housing. The first end of the feed rod is provided with a mounting part for mounting the cathode. The first end of the housing is provided with a through hole for inserting the cathode. The feed rod can move along the length direction of the housing.

[0021] A second aspect of this disclosure provides a method for recycling lithium-ion battery materials, comprising the following steps:

[0022] S1: Place the positive electrode material at a distance of 20cm to 80cm from the outlet of the plasma generator, turn on the plasma generator, set the output power of the plasma generator to 5kW to 10kW, run for 5 to 15 minutes, and remove the binder in the positive electrode material from the electrode sheet.

[0023] S2: Set the plasma generator output power to 15kW~20kW, run for 10 to 20 minutes, remove and collect metallic aluminum;

[0024] S3: Set the plasma generator output power to 40kW~50kW and run it for 10 to 20 minutes to collect the oxides.

[0025] Furthermore, in step S1, the positive electrode material is placed 50cm to 80cm away from the outlet of the plasma generator, the plasma generator is turned on, the output power of the plasma generator is set to 10kW, and it is run for 5 minutes to remove the binder in the positive electrode material from the electrode sheet.

[0026] In step S2, the plasma generator output power is set to 15kW~20kW and run for 10 minutes to remove and collect metallic aluminum.

[0027] In step S3, the plasma generator output power is set to 50kW and run for 10 minutes to collect oxides.

[0028] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0029] The lithium-ion battery material recycling system provided in this embodiment includes: a gasification furnace, a plasma generator, and a feeder; the gasification furnace has a discharge port and a gas outlet; the input end of the plasma generator is connected to a steam generator for conveying water vapor; the gas outlet of the plasma generator is connected to the gasification furnace, and the plasma generator is used to convert water vapor into a water vapor plasma torch; the feeder is disposed in the gasification furnace and is used to place the positive electrode material at a distance from the outlet of the plasma generator. This embodiment uses water vapor as a medium and utilizes the plasma generated by the plasma generator to recycle waste lithium-ion battery materials. By utilizing the high local energy density of the plasma generator, the lithium-ion battery materials can be locally heated, thereby recovering valuable metals. Utilizing the high temperature of water vapor, the solvent can be effectively decomposed into a gaseous state and stripped from the metal, preventing it from mixing with the metal. In addition, this method avoids the use of an air torch, preventing the formation of gaseous adhesives in the air torch.

[0030] This embodiment uses water vapor as a medium. The plasma generated by the plasma generator can decompose the elements in the electrode of the lithium-ion battery. In the water vapor medium, the elements in the positive electrode of the lithium-ion battery directly volatilize according to their different melting points. Then, when the steam medium in the air cools down, the metal substances can be carried out, which can more effectively extract valuable rare metal materials.

[0031] This embodiment uses water vapor as a medium, and the plasma generated by the plasma generator can locally heat the electrodes of the lithium-ion battery, resulting in high efficiency and speed. This allows for fast and efficient processing of lithium-ion batteries by the plasma torch. Secondly, the energy efficiency required for processing lithium-ion batteries by the plasma torch is extremely high because the heating area is small, the unit energy is high, and it can perform targeted processing. This is something that cannot be achieved by any other method. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the lithium-ion battery material recycling system described in an embodiment of this disclosure.

[0035] Reference numerals in the attached drawings: 1. Gasifier; 2. Plasma generator; 3. Feeder; 4. Scrubber; 5. Demister; 6. Conveying mechanism; 71. First conveying pipe; 72. Second conveying pipe; 73. Third conveying pipe; 74. Discharge pipe; 75. Discharge port; 81. First conveying pipe; 82. Second conveying pipe; 83. Third conveying pipe; 84. Gas outlet pipe; 85. Condenser; 9. Exhaust pipe; 10. Exhaust gas detection mechanism. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0037] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0038] like Figure 1 As shown, the lithium-ion battery material recycling system provided in this embodiment includes: a gasification furnace 1, a plasma generator 2, and a feeder 3; the gasification furnace 1 is provided with a discharge port and a gas outlet; the input end of the plasma generator 2 is connected to a steam generator for conveying water vapor; the gas outlet of the plasma generator 2 is connected to the gasification furnace 1, and the plasma generator 2 is used to convert water vapor into a steam plasma torch to pyrolyze the positive electrode material in the gasification furnace 1; the feeder 3 is disposed in the gasification furnace 1 and is used to place the positive electrode material at a distance from the outlet of the plasma generator 2, for example, 20cm to 80cm from the outlet. This embodiment uses water vapor as a medium and utilizes the plasma generated by the plasma generator 2 to recycle waste lithium-ion battery materials. By utilizing the high local energy density of the plasma generator, the lithium-ion battery materials can be locally heated, thereby recovering valuable metals. By utilizing the high temperature properties of water vapor, the solvent can be effectively decomposed into a gaseous state and separated from the metal, preventing it from mixing with the metal. In addition, this method avoids the use of an air torch, preventing the formation of gaseous adhesives in the air torch.

[0039] During operation, the positive electrode material is fed into the gasification furnace 1 through the feeder 3. The plasma generator 2 is activated to generate a constant temperature, causing the positive electrode material to undergo pyrolysis and gasification. The generated gas is drawn out from the gas outlet at the top of the gasification furnace 1 and conveyed by the conveying mechanism 6. The positive electrode material is then discharged from the outlet after impurities and liquids are burned off by the plasma torch. In this embodiment, water vapor is used as the medium. The plasma generated by the plasma generator 2 can decompose the elements of the lithium-ion battery electrode. In the water vapor medium, the elements in the positive electrode of the lithium-ion battery directly volatilize according to their different melting points. Then, when the steam medium in the air cools, the metallic substances can be carried out, which can more effectively extract valuable rare metal materials.

[0040] The conveying mechanism 6 may include a wheel and a conveyor belt wound around the wheel.

[0041] This embodiment uses water vapor as a medium, and the plasma generated by the plasma generator 2 can locally heat the electrodes of the lithium-ion battery, resulting in high efficiency and speed. This allows for fast and efficient processing of lithium-ion batteries by the plasma torch. Secondly, the energy efficiency required for processing lithium-ion batteries by the plasma torch is extremely high because the heating area is small, the unit energy is high, and it can perform targeted processing. This is something that cannot be achieved by any other method.

[0042] In some specific embodiments, the lithium-ion battery material recycling system also includes a scrubber 4, which removes fly ash and gaseous impurities from the products, purifies the gas, and retains the solid products. The solid products include aluminum oxide, manganese oxide, cobalt oxide, nickel oxide, and lithium oxide; liquid impurities include organic solvents such as EC, EMC, LiPF6, VC, PC, and PS; and gaseous impurities include hydrogen, carbon dioxide, and carbon monoxide. The washing liquid in the scrubber 4 can dissolve small amounts of hydrogen, carbon dioxide, or carbon monoxide. The scrubber 4 can separate the solvents and recover the metals.

[0043] The outlet of the gasifier 1 is connected to the scrubber 4 via a first conveying pipe 71. The outlet of the scrubber 4 is connected to the inlet of the demister 5 via a second conveying pipe 72. The outlet of the scrubber 4 is connected to the inlet of the demister 5 via a third conveying pipe 73. The outlet of the demister 5 is connected to a discharge pipe 74, which has an outlet 75, thus enabling the recovery of valuable metals. Utilizing the high-temperature properties of steam, the solvent can be effectively decomposed into a gaseous state and separated from the metal, preventing it from mixing with the metal. The scrubber 4 can then separate the solvent and recover the metal.

[0044] In some specific embodiments, the lithium-ion battery material recycling system also includes a demister 5, which removes gaseous impurities from the solid products while retaining the solid products. The solid products include aluminum oxide, manganese oxide, cobalt oxide, nickel oxide, and lithium oxide; the gaseous impurities include hydrogen, carbon dioxide, and carbon monoxide. The demister 5 can separate the solvent from the metal, preventing it from mixing with the metal. A condenser 85 is provided between the gas outlet of the gasifier 1 and the scrubber 4. Since different oxides are generated at high temperatures, the condenser 85 is used to cool the gas and collect the different oxides that have detached from the current collector.

[0045] The condenser 85 is connected to the gasifier 1 and the scrubber 4 via a first conveying pipe 81. The outlet of the scrubber 4 is connected to the inlet of the demister 5 via a second conveying pipe 82. The outlet of the scrubber 4 is connected to the inlet of the demister 5 via a third conveying pipe 83. The outlet of the demister 5 is connected to an outlet pipe 84, thereby enabling the recovery of valuable metals. The demister 5 can be used to separate the solvent from the metal, preventing it from mixing with the metal.

[0046] In some specific embodiments, both the exhaust pipe 84 and the discharge pipe 74 are equipped with an exhaust gas detection mechanism 10. The exhaust gas detection mechanism 10 is used to detect whether there is gas in the exhaust pipe 84 and the discharge pipe 74. The exhaust gas detection mechanism 10 may include a gas sensor, which is used to detect whether there is a certain gas in the exhaust pipe 84 and the discharge pipe 74, and transmit the detected information to the controller.

[0047] In some specific embodiments, both the vent pipe 84 and the discharge pipe 74 are connected to the exhaust pipe 9 to discharge the residual gas in the vent pipe 84 and the discharge pipe 74.

[0048] In some specific embodiments, the scrubber 4 includes a scrubbing nozzle, which is disposed above the first conveying pipe 71 and can spray scrubbing liquid into the gas to be scrubbed in the first conveying pipe 71, thereby separating the solvent and recovering the metal.

[0049] In some specific embodiments, the gasifier 1 is equipped with multiple plasma generators 2, which are evenly spaced along the circumference of the gasifier 1, thereby increasing the decomposition rate of battery materials and improving efficiency.

[0050] In some specific embodiments, the plasma generator 2 includes a coaxially arranged cathode assembly, anode, and inlet ring. The cathode assembly includes a cathode, a hollow housing, and a feed rod. A discharge chamber is formed between the first end of the housing and the anode. The inlet ring is used to supply working gas to the discharge chamber. The anode has an arc flame outlet communicating with the discharge chamber. The first end of the feed rod is inserted into the interior of the housing from the second end. The first end of the feed rod has a mounting part for mounting the cathode, and the first end of the housing has a through hole for inserting the cathode. The feed rod can move along the length of the housing. The cathode is mounted on the mounting part, and the free end of the cathode is inserted into the through hole, so that an electric field is generated between the cathode and the anode. During use, the cathode is pushed towards the anode by the feed rod to compensate for the ablated cathode, thereby maintaining a stable gap between the cathode and anode. Frequent cathode replacement is not required, allowing the plasma torch to operate continuously and stably for a long time. The cathode compensation process does not require re-arcing, allowing the plasma torch to work continuously, increasing work efficiency, and has the advantages of simple structure and low manufacturing cost.

[0051] The lithium-ion battery material recycling method provided in this disclosure includes the following steps:

[0052] S1: Place the positive electrode material at a distance of 20cm to 80cm from the outlet of plasma generator 2, turn on plasma generator 2, set the output power of plasma generator 2 to 5kW to 10kW, run for 5 to 15 minutes, and remove the low melting point binder from the electrode.

[0053] Optionally, in this embodiment, the low-melting-point adhesive can be converted into gas in the gasifier 1 and discharged from the gas outlet of the gasifier.

[0054] S2: Set the output power of plasma generator 2 to 15kW~20kW, run for 10 to 20 minutes, remove and collect metallic aluminum.

[0055] Optionally, metallic aluminum or aluminum oxide detached from the electrode can be discharged from the outlet of the gasifier 1 via the conveying mechanism 6. S3: Set the output power of the plasma generator 2 to 40kW~50kW and run it for 10 to 20 minutes to collect the oxides. The oxides include manganese oxide, cobalt oxide, nickel oxide, and lithium oxide, etc.

[0056] Optionally, manganese oxide, cobalt oxide, nickel oxide, and lithium oxide that have detached from the electrode can be discharged from the outlet of the gasifier 1 via the conveying mechanism 6.

[0057] When the power is low, i.e., at 5-10kW, and the temperature is controlled at 100-300℃, the low-melting-point binder can be converted into gas in the gasifier 1 and discharged from the gas outlet of the gasifier. At higher power, i.e., at 15-20kW, and the temperature is controlled at 300-800℃, low-melting-point aluminum and aluminum oxides will detach first. The aluminum or aluminum oxides detached from the electrode can be discharged from the outlet of the gasifier 1 through the conveying mechanism 6. At 40-50kW, and the temperature is controlled between 800-1500℃, manganese oxide, cobalt oxide, nickel oxide, and lithium oxide will detach from the electrode. The detached manganese oxide, cobalt oxide, nickel oxide, and lithium oxide can be discharged from the outlet of the gasifier 1 through the conveying mechanism 6.

[0058] In some specific implementations, in step S1, the positive electrode material is placed 50cm to 80cm away from the outlet of the plasma generator 2, the plasma generator 2 is turned on, the output power of the plasma generator 2 is set to 10kW, and it is run for 5 minutes to remove the low melting point binder from the electrode sheet.

[0059] In step S2, the output power of plasma generator 2 is set to 15kW~20kW and run for 10 minutes to remove and collect metallic aluminum;

[0060] In step S3, the plasma generator 2 is set to an output power of 50kW and run for 10 minutes to collect oxides, including manganese oxide, cobalt oxide, nickel oxide, and lithium oxide. Optionally, the ternary cathode material of the lithium-ion battery is placed within the plasma torch, 50-80cm from the ion torch outlet, with a power of 10-50kW. The ternary cathode electrode composition is LiNi0.6Co0.2Mn0.2O2, and the binder contains PVDF (polyvinylidene fluoride) and carbon black. A steam generator is located outside the system. The electrode is placed 20-50cm from the outlet of plasma generator 2, and the steam generator is turned on, then ablation is performed at a power of 10-50kW. During the ablation process, we follow these steps: First, the plasma torch output power is set to 10kW and run for 5 minutes to remove the low-melting-point binder from the electrode. This means that PVDF (polyvinylidene fluoride) and carbon black in the binder will turn into gas and be discharged from the gas outlet of gasifier 1. Then, the power is increased to 15-20W and run for 10 minutes to remove the aluminum metal and collect it from the outlet of gasifier 1. Finally, the power is increased to 50kW and run for 10 minutes to collect the oxides such as manganese oxide, cobalt oxide, nickel oxide, and lithium oxide. First, the positive electrode material is placed in feeder 3, and plasma generator 2 processes it using water vapor as the medium. Ablation is initially performed at low power for less than five minutes, primarily to vaporize the PVDF and electrolyte, which are then cooled into a liquid state by condenser 85. The cathode raw materials are then converted into cobalt oxide, nickel oxide, and manganese oxide within a power range of 20kW-50kW. They are then transported to the jet scrubber 4 via the conveyor mechanism 6 to remove fly ash and gaseous impurities. The gaseous impurities are then removed by the demister 5. Finally, the gas is discharged through the exhaust gas detector to obtain a mixture of different metal oxides, including manganese oxide, cobalt oxide, nickel oxide, and lithium oxide. These can be further separated by subsequent specialized equipment.

[0061] Traditional processing methods involve discharging multiple batteries, then assembling them and cutting them up. This process, calculated based on the total time, takes approximately 12 to 18 hours. However, the lithium-ion battery material recycling method provided in this embodiment utilizes a plasma torch for rapid and efficient processing, completing the electrode processing of a module in just about 30 minutes. This significantly reduces the time required by other methods, including high-temperature pyrolysis and biological methods. This is because the plasma torch allows for localized heating, resulting in high efficiency and speed. The plasma generator 2 has a small heating area and high energy per unit area, enabling targeted processing.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lithium-ion battery material recycling system, characterized in that, include: Gasifier (1), plasma generator (2) and feeder (3); The gasifier (1) is provided with a material outlet and a gas outlet; The input end of the plasma generator (2) is connected to a steam generator for conveying water vapor; The outlet of the plasma generator (2) is connected to the gasification furnace (1). The plasma generator (2) is used to convert water vapor into plasma and transport it into the gasification furnace (1). The feeder (3) is located in the gasifier (1) and is used to place the positive electrode material at the outlet of the plasma generator (2).

2. The lithium-ion battery material recycling system according to claim 1, characterized in that, It also includes a scrubber (4) and a demister (5); The outlet of the gasifier (1) is connected to the scrubber (4) through a first transmission pipe (71), the outlet of the scrubber (4) is connected to the inlet of the demister (5) through a second transmission pipe (72), the outlet of the scrubber (4) is connected to the inlet of the demister (5) through a third transmission pipe (73), the outlet of the demister (5) is connected to the outlet pipe (74), and the outlet pipe (74) has an outlet (75).

3. The lithium-ion battery material recycling system according to claim 2, wherein a condenser (85) is provided between the gas outlet of the gasifier (1) and the scrubber (4), the condenser (85) is connected to the gasifier (1) and the scrubber (4) respectively through a first conveying pipe (81), the gas outlet of the scrubber (4) is connected to the gas inlet of the demister (5) through a second conveying pipe (82), the gas outlet of the scrubber (4) is connected to the gas inlet of the demister (5) through a third conveying pipe (83), and the gas outlet of the demister (5) is connected to the gas outlet pipe (84).

4. The lithium-ion battery material recycling system according to claim 3, characterized in that, Both the exhaust pipe (84) and the discharge pipe (74) are equipped with exhaust gas detection mechanisms (10).

5. The lithium-ion battery material recycling system according to claim 3, characterized in that, Both the air outlet pipe (84) and the material outlet pipe (74) are connected to the exhaust pipe (9).

6. The lithium-ion battery material recycling system according to claim 2, characterized in that, The washer (4) includes a washing nozzle, which is disposed above the first transmission pipe (71) and can spray washing liquid into the gas to be washed in the first transmission pipe (71).

7. The lithium-ion battery material recycling system according to any one of claims 1 to 6, characterized in that, The gasifier (1) is provided with a plurality of plasma generators (2), which are evenly spaced along the circumference of the gasifier (1).

8. The lithium-ion battery material recycling system according to claim 1, characterized in that, The plasma generator (2) includes a cathode assembly, an anode, and an intake ring arranged coaxially; The cathode assembly includes a cathode, a hollow housing, and a feed rod; A discharge chamber is formed between the first end of the housing and the anode. The air inlet ring is used to supply working gas to the discharge chamber. An arc flame channel communicating with the discharge chamber is provided on the anode. The first end of the feed rod is inserted into the interior of the housing from the second end of the housing. The first end of the feed rod is provided with a mounting part for mounting the cathode. The first end of the housing is provided with a through hole for inserting the cathode. The feed rod can move along the length direction of the housing.

9. A method for recycling lithium-ion battery materials, applied to the lithium-ion battery material recycling system according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the positive electrode material at a distance of 20cm to 80cm from the outlet of the plasma generator, turn on the plasma generator, set the output power of the plasma generator to 5kW to 10kW, run for 5 to 15 minutes, and remove the binder in the positive electrode material from the electrode sheet. S2: Set the output power of the plasma generator (2) to 15kW~20kW, run for 10 to 20 minutes, remove and collect the metallic aluminum; S3: Set the output power of the plasma generator (2) to 40kW~50kW, run for 10 to 20 minutes, and collect the oxides.

10. The lithium-ion battery material recycling method according to claim 9, characterized in that, In step S1, the positive electrode material is placed 50cm to 80cm away from the outlet of the plasma generator (2), the plasma generator (2) is turned on, the output power of the plasma generator (2) is set to 10kW, and it is run for 5 minutes to remove the binder in the positive electrode material from the electrode sheet. In step S2, the output power of the plasma generator (2) is set to 15kW~20kW, and it is run for 10 minutes to remove and collect the metallic aluminum. In step S3, the plasma generator (2) is set to output power of 50kW and run for 10 minutes to collect oxides.

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