NCM ternary material regeneration method based on ion intervention method and regenerated material evaluation method
阅读说明：本技术 基于离子介入法的ncm三元材料再生方法及再生材料评测方法 (NCM ternary material regeneration method based on ion intervention method and regenerated material evaluation method ) 是由 曹元成 郭亚晴 黄鹏杰 韩奇高 王富禾 于 2021-07-07 设计创作，主要内容包括：本发明提供了一种基于离子介入法的NCM三元材料再生方法及再生材料评测方法。通过将商业废弃锂离子电池分离出正极回收材料,经过有机溶剂溶解除杂,水热处理补充锂离子,然后将NCM三元材料加入少量LiOH·H-(2)O粉末高温煅烧,得到再生NCM三元材料。将再生NCM三元材料结合乙炔黑和PVDF作为正极材料,石墨、碳导电剂、CMC和LA133作为负极材料建立再生软包电池进行再生NCM材料评测。通过上述方式,本发明可以得到性能优异、具有实际应用价值的再生NCM三元材料,同时实现了锂离子电池中NCM三元正极材料的循环利用,有利于缓解锂离子电池正极材料短缺的问题,且避免了锂离子电池因处理不当对生态环境造成的污染。(The invention provides an NCM ternary material regeneration method and a regenerated material evaluation method based on an ion intervention method. Separating out the anode recovery material from the commercial waste lithium ion battery, dissolving and removing impurities by an organic solvent, supplementing lithium ions by hydrothermal treatment, and then adding a small amount of LiOH & H into the NCM ternary material 2 And calcining the O powder at high temperature to obtain the regenerated NCM ternary material. And (3) the regenerated NCM ternary material is combined with acetylene black and PVDF to serve as a positive electrode material, and graphite, a carbon conductive agent, CMC and LA133 serve as negative electrode materials to establish a regenerated soft package battery for evaluation of the regenerated NCM material. By passingBy adopting the mode, the regenerated NCM ternary material with excellent performance and practical application value can be obtained, the cyclic utilization of the NCM ternary anode material in the lithium ion battery is realized, the problem of shortage of the lithium ion battery anode material is favorably solved, and the pollution to the ecological environment caused by improper treatment of the lithium ion battery is avoided.)
1. An NCM ternary material regeneration method based on an ion intervention method is characterized by comprising the following steps:
s1, disassembling the commercial waste lithium ion battery, and separating out the anode recovery material of the lithium ion battery;
s2, sequentially putting the cathode recycled material obtained in the step S1 into N, N-dimethylformamide and N-methyl-2-pyrrolidone for soaking, and dissolving to obtain an NCM ternary material;
s3, sequentially carrying out centrifugation, drying, screening and annealing treatment on the NCM ternary material obtained in the step S2 to obtain a preprocessed NCM ternary material;
s4, adding the pretreated NCM ternary material obtained in the step S3 into a LiOH solution for hydrothermal treatment, and then directly separating and drying to obtain an NCM ternary material to be calcined at a high temperature; the pretreatment NCM ternary material and LiOH in the LiOH solution are kept in an equimolar ratio;
s5, mixing the NCM ternary material to be calcined at high temperature obtained in the step S4 with LiOH & H2Mixing the powder of the raw materials with the powder of O,and carrying out high-temperature calcination in the air to obtain the regenerated NCM ternary material.
2. The method for regenerating the NCM ternary material based on the ion intervention method as claimed in claim 1, wherein the method comprises the following steps: in step S5, the NCM ternary material to be high-temperature calcined is reacted with the LiOH H2The mass ratio of the O powder is 1 (0.05-0.1), the high-temperature calcination treatment temperature is 800-850 ℃, and the time is 3-4 h.
3. The method for regenerating the NCM ternary material based on the ion intervention method as claimed in claim 1, wherein the method comprises the following steps: in step S2, the N, N-dimethylformamide is used to remove the electrolyte on the surface of the cathode recycled material, and the N-methyl-2-pyrrolidone is used to remove the polyvinylidene fluoride and the organic lithium salt on the surface of the cathode recycled material.
4. The method for regenerating the NCM ternary material based on the ion intervention method as claimed in claim 1, wherein the method comprises the following steps: in step S3, the temperature of the annealing treatment is 350-400 ℃, and the time is 1-2 h.
5. The method for regenerating the NCM ternary material based on the ion intervention method as claimed in claim 1, wherein the method comprises the following steps: in step S4, the equipment used for the hydrothermal treatment is an autoclave, the temperature is 200-300 ℃, and the heat preservation time is 2-4 h.
6. The method for regenerating the NCM ternary material based on the ion intervention method as claimed in claim 1, wherein the method comprises the following steps: in step S1, the commercial waste ion battery includes, but is not limited to, one of a battery that is scrapped for direct cycle performance, a scrap made from commercial batteries, a battery with electrolyte failure resulting in performance degradation, and a battery with damaged battery case.
7. A recycled material evaluation method, characterized by: the recycled material is the recycled NCM ternary material obtained by the recycling method of any one of claims 1 to 6, the recycled material is evaluated by establishing a recycled soft package battery, the positive electrode material of the recycled soft package battery comprises the recycled material, acetylene black and polyvinylidene fluoride, and the negative electrode material comprises graphite, a carbon conductive agent, sodium carboxymethylcellulose and a hydrophilic adhesive.
8. A recycled material evaluation method according to claim 7, wherein: the mass ratio of the regenerated material to the acetylene black to the polyvinylidene fluoride is 96.2:2:1.8, and the mass load of the positive electrode material on the aluminum foil is 21 +/-0.5 mg/cm2。
9. A recycled material evaluation method according to claim 7, wherein: the mass ratio of the graphite to the carbon conductive agent to the sodium carboxymethylcellulose to the hydrophilic adhesive is 95:2:1:2, and the mass load of the negative electrode material on the copper foil is 10.8 +/-0.2 mg/cm2。
10. A recycled material evaluation method according to claim 9, wherein: the negative electrode material is prepared by the following method: the sodium carboxymethyl cellulose is completely dissolved in the water solution, then the carbon conductive agent and the graphite are added into the sodium carboxymethyl cellulose water solution in sequence under high-speed stirring, finally the hydrophilic adhesive is slowly added into the sodium carboxymethyl cellulose water solution at a low speed, and the sodium carboxymethyl cellulose water solution is kept for 1 hour in vacuum.
Technical Field
The invention relates to the technical field of recycling of commercial waste lithium ion batteries, in particular to an NCM ternary material recycling method and a recycled material evaluation method based on an ion intervention method.
Background
With the miniaturization of electronic products such as mobile phones and computers and the development of new energy electric vehicles, lithium ion batteries are more and more widely applied due to the characteristics of high energy density, high coulomb efficiency, long cycle life and the like. With the rapid development of the market, the global production capacity of lithium ion batteries is higher and higher, and in the next 5 years, the lithium battery industry will span from the GWH to the TWh era. At present, China becomes a world with large lithium ion battery production and consumption, the market scale of the lithium ion battery is larger and larger, the output of the lithium ion battery is higher and higher, and the lithium ion battery is more and more garbage. At present, the waste lithium ion batteries are generally treated together with domestic garbage in modes of landfill, incineration, composting and the like, and according to statistics, less than 5 percent of the waste batteries are recycled. If the waste lithium ion battery is not well solved, it is not only harmful to the health development of human beings, but also destroys the natural ecological environment. Heavy metals such as Ni, Co, Mn and the like, which are used as positive electrode materials of lithium ion batteries, can seriously damage soil, underground water and electrolytes (mainly LiPF)6) And water molecules in the air can react to generate harmful hydrogen fluoride gas. Meanwhile, the shortage of raw materials of lithium ion batteries also makes the recycling of the NCM (nickel cobalt manganese based) ternary material in the anode material of the waste lithium ion batteries become a trend.
Commercial waste batteries currently comprise mainly several sources: direct cycle performance scrap batteries, scrap from commercial battery manufacture, batteries with electrolyte failure leading to performance degradation, batteries with damaged battery case retired, and the like. In the situation, it is a pressing task to recycle the waste lithium ion batteries and recycle the NCM ternary cathode material to eliminate the environmental pollution caused by the waste lithium ion battery treatment.
In view of the above, it is necessary to design a method for regenerating an NCM ternary material and a method for evaluating a regenerated material based on an ion intervention method to solve the above problems.
Disclosure of Invention
The invention aims to provide an NCM ternary material regeneration method and a regenerated material evaluation method based on an ion intervention method, wherein a regenerated NCM ternary material is obtained by carrying out treatment processes such as dissolution, hydrothermal treatment, high-temperature calcination treatment and the like on an NCM ternary positive electrode material in a commercial waste lithium ion battery; and establishing a regenerated soft package battery by using the regenerated NCM ternary material as a positive electrode material, and evaluating the long-period performance of the regenerated NCM ternary material to finally obtain the regenerated NCM ternary material with excellent performance.
In order to achieve the aim, the invention provides an NCM ternary material regeneration method and a regenerated material evaluation method based on an ion intervention method, wherein the NCM ternary material regeneration method based on the ion intervention method comprises the following steps:
s1, disassembling the commercial waste lithium ion battery, and separating out the anode recovery material of the lithium ion battery;
s2, sequentially putting the cathode recycled material obtained in the step S1 into two organic solvents of N, N-Dimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP) for soaking, and dissolving to obtain an NCM ternary material;
s3, sequentially carrying out centrifugation, drying, screening and annealing treatment on the NCM ternary material obtained in the step S2 to obtain a preprocessed NCM ternary material;
s4, adding the pretreated NCM ternary material obtained in the step S3 into a LiOH solution for hydrothermal treatment, and then directly separating and drying to obtain an NCM ternary material to be calcined at a high temperature; the pretreatment NCM ternary material and LiOH in the LiOH solution are kept in an equimolar ratio;
s5, and carrying out high-temperature calcination on the NC to be subjected to high-temperature calcination obtained in the step S4M ternary material and LiOH. H2And mixing O powder, and calcining at high temperature in air to obtain the regenerated NCM ternary material.
As a further improvement of the invention, in step S5, the mass ratio of the NCM ternary material to be calcined at high temperature to the LiOH H2O powder is 1 (0.05-0.1), the temperature of the high-temperature calcination treatment is 800-850 ℃, and the time is 3-4H.
As a further improvement of the present invention, in step S2, the DMF is used to remove the electrolyte from the surface of the cathode recycled material, and the NMP is used to remove polyvinylidene fluoride (PVDF) and an organic lithium salt from the surface of the cathode recycled material.
As a further improvement of the invention, in step S3, the temperature of the annealing treatment is 350-400 ℃ and the time is 1-2 h.
As a further improvement of the invention, in step S4, the equipment used for the hydrothermal treatment is an autoclave, the temperature is 200-300 ℃, and the heat preservation time is 2-4 h.
As a further improvement of the present invention, in step S1, the commercial waste ion battery includes, but is not limited to, one of a direct cycle performance scrapped battery, a scrap of commercial battery manufacture, a battery with electrolyte failure leading to performance degradation, and a battery with damaged battery case for retirement.
A recycled material evaluation method is characterized in that the recycled material is the recycled NCM ternary material obtained by the recycling method, the recycled material is evaluated by establishing a recycled soft package battery, the positive electrode material of the recycled soft package battery comprises the recycled material, acetylene black and PVDF, and the negative electrode material comprises graphite, a carbon conductive agent, sodium carboxymethylcellulose (CMC) and a hydrophilic adhesive (LA 133).
As a further improvement of the invention, the mass ratio of the regenerated material to the acetylene black to the PVDF is 96.2:2:1.8, and the mass load of the cathode material on the aluminum foil is 21 +/-0.5 mg/cm2。
As a further improvement of the invention, the mass ratio of the graphite to the carbon conductive agent to the CMC to the LA133 is 95:2:1:2, and the mass load of the negative electrode material on the copper foil is 10.8±0.2mg/cm2。
As a further improvement of the present invention, the negative electrode material is prepared by the following method: the CMC was completely dissolved in an aqueous solution, then the carbon conductive agent and the graphite were sequentially added to the CMC aqueous solution under high-speed stirring, and finally the LA133 was slowly added thereto at a low speed and maintained in vacuum for 1 hour.
The invention has the beneficial effects that:
1. according to the regeneration method and the evaluation method of the NCM ternary material based on the ion intervention method, the regenerated NCM ternary material is obtained by disassembling the commercial waste battery, separating out the anode recycled material, and then carrying out treatment processes such as dissolution, hydrothermal treatment, high-temperature calcination and the like on the NCM ternary anode material; and establishing a regenerated soft package battery by using the regenerated NCM ternary material as a positive electrode material, evaluating the long-period performance of the regenerated NCM ternary material, and finally obtaining the regenerated NCM ternary material with excellent performance. By the method, impurities of the waste NCM ternary material can be dissolved and cleaned, lithium ions are supplemented through hydrothermal reaction, and the regenerated NCM ternary material is obtained again through high-temperature calcination treatment; the regenerated NCM ternary material is used as the anode material and is combined with other materials to establish the regenerated soft package battery, so that the regenerated NCM ternary material with recycling significance and excellent performance is obtained, meanwhile, the cyclic utilization of the NCM ternary anode material in the lithium ion battery is realized, resources are saved, and the pollution to the ecological environment caused by the improper treatment of the lithium ion battery as garbage is avoided.
2. According to the invention, the anode recycled material is dissolved in two organic solvents of DMF and NMP, the DMF is used for removing the electrolyte on the surface of the anode recycled material, and the NMP is used for removing PVDF and organic lithium salt, so that the influence of unnecessary impurities on the subsequent hydrothermal and high-temperature calcination treatment process is avoided. After the hydrothermal treatment, water washing is not needed, the NCM ternary material to be calcined at high temperature is obtained by direct filtration and drying, the operation is to avoid the situation that the surface of the NCM ternary material subjected to water washing loses redundant lithium salt, and the surface of the NCM ternary material not subjected to water washing has enough Li to react with the NCM ternary material in the high-temperature process, so that the material is repairedThe surface failure rock salt phase successfully obtains the regenerated NCM ternary material. In addition, LiOH & H is added in the high-temperature calcination treatment stage2O powder is mixed with the NCM ternary material to be high-temperature calcined, and the purpose of this operation is to prevent the evaporative decomposition of lithium during the high-temperature calcination, thereby ensuring the regeneration of the NCM ternary material.
3. According to the invention, the long-period performance of the regenerated NCM ternary material is evaluated by establishing the positive electrode of the regenerated soft package battery on the aluminum foil by taking the regenerated NCM ternary material, acetylene black and PVDF as active materials, and establishing the negative electrode of the regenerated soft package battery on the copper foil by taking graphite, a carbon conductive agent, CMC and LA133 as active materials. In the mode, the regenerated NCM ternary material is applied to the regenerated soft package battery as the anode material, so that the long-period performance of the regenerated NCM ternary material is more comprehensively obtained, whether the performance of the regenerated material achieves an ideal effect or not is further determined, the method has an important significance for recycling the NCM ternary anode material of the lithium ion battery in practical application, and is beneficial to relieving the problem of material resource shortage of the lithium ion battery.
Drawings
Fig. 1 is a graph showing charge and discharge characteristics of a waste lithium ion battery according to the methods provided in examples and comparative examples.
Fig. 2 is a graph showing rate characteristics of a waste lithium ion battery according to the methods provided in examples and comparative examples.
Fig. 3 is a graph showing the cycle curve of a regenerated pouch battery made by regenerating an NCM ternary material according to an embodiment of the present invention.
Fig. 4 is a CV curve graph of a regenerated pouch battery prepared by regenerating an NCM ternary material according to an embodiment of the present invention.
Fig. 5 is a GITT graph of a regenerated pouch cell made from a regenerated NCM ternary material according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a regenerated pouch battery prepared by the example of the waste lithium ion battery.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides an NCM ternary material regeneration method and a regenerated material evaluation method based on an ion intervention method, wherein the NCM ternary material regeneration method based on the ion intervention method comprises the following steps:
s1, disassembling the commercial waste lithium ion battery, and separating out the anode recovery material of the lithium ion battery; the commercial waste ion battery includes, but is not limited to, one of a direct cycle performance scrapped battery, a scrap material produced by commercial batteries, a battery with electrolyte failure leading to performance degradation, and a battery with a damaged battery shell which is out of service.
S2, sequentially putting the anode recycled material obtained in the step S1 into DMF (dimethyl formamide) and NMP (N-methyl pyrrolidone) for soaking, and performing dissolving treatment to obtain an NCM (N-methyl pyrrolidone) ternary material; wherein DMF is used for removing the electrolyte on the surface of the positive electrode recovery material, and NMP is used for removing PVDF and organic lithium salt.
S3, sequentially carrying out centrifugation, drying, screening and annealing treatment on the NCM ternary material obtained in the step S2 to obtain a preprocessed NCM ternary material; wherein the temperature of the annealing treatment is 400 ℃ and the time is 1 h.
S4, adding the pretreated NCM ternary material obtained in the step S3 into a LiOH solution for hydrothermal treatment, and then directly separating and drying to obtain an NCM ternary material to be calcined at high temperature; wherein the molar ratio of the NCM ternary material to LiOH in the LiOH solution is kept equal, the equipment used for hydrothermal treatment is an autoclave, the temperature is 220 ℃, and the heat preservation time is 3 hours.
S5, mixing the NCM ternary material to be calcined at high temperature obtained in the step S4 with LiOH & H2Mixing O powder, and calcining at high temperature in air to obtain a regenerated NCM ternary material; wherein the NCM ternary material to be calcined at high temperature and LiOH & H2The mass ratio of the O powder is 1 (0.05-0.1), the high-temperature calcination process temperature is 810 ℃, and the time is 4 hours.
A regenerated material evaluation method, the regenerated material is the regenerated NCM ternary material that the above-mentioned regeneration method gets, the regenerated material realizes evaluating through setting up the soft packet battery of regeneration; the positive electrode material of the regenerative soft package battery comprises a regenerative material, acetylene black and PVDF, and the negative electrode material comprises graphite, a carbon conductive agent, CMC and LA 133.
Wherein the mass ratio of the regeneration material to the acetylene black to the PVDF is 96.2:2:1.8, and the mass load of the anode material on the aluminum foil is 21 +/-0.5 mg/cm2。
The mass ratio of the graphite to the carbon conductive agent to the CMC to the LA133 is 95:2:1:2, and the mass load of the negative electrode material on the copper foil is 10.8 +/-0.2 mg/cm2。
The anode material is prepared by the following method: CMC is completely dissolved in the water solution, then the carbon conductive agent and graphite are added into the CMC water solution under high-speed stirring in sequence, finally LA133 is slowly added into the CMC water solution at low speed, and the CMC solution is kept for 1 hour in vacuum.
The following describes the regeneration method and the evaluation method of the regenerated material of the NCM ternary material based on the ion intervention method, with reference to specific examples.
Examples
An NCM ternary material regeneration method based on an ion intervention method comprises the following steps: firstly, disassembling the recovered waste lithium ion battery, and separating out the anode recovery material of the lithium ion battery; and sequentially putting the anode recycled material into DMF (dimethyl formamide) and NMP (N-methyl pyrrolidone) for soaking and dissolving, and removing the electrolyte, PVDF (polyvinylidene fluoride) and organic lithium salt on the surface to obtain the NCM ternary material. Centrifuging and drying the NCM ternary material by adopting a centrifugal dryer, removing liquid in the NCM ternary material, then screening, and annealing at the temperature of 400 ℃ for 1h to obtain a pretreatmentAnd (3) a physical NCM ternary material. Keeping the molar ratio of the pretreated NCM ternary material to LiOH equal, mixing the pretreated NCM ternary material and the LiOH solution to perform hydrothermal reaction for 3 hours at 220 ℃, and then directly performing filtration and drying to obtain the NCM ternary material to be calcined at high temperature. NCM ternary material (2.3g) to be calcined at high temperature was reacted with LiOH. H2O powder (0.12g) is mixed and calcined in air at 810 ℃ for 4h to obtain the regenerated NCM ternary material.
A regenerated material evaluation method, the regenerated material is the regenerated NCM ternary material that the above-mentioned regeneration method gets, the regenerated material realizes evaluating through setting up the soft packet battery of regeneration; establishing a positive electrode material of a regenerated soft package battery on a copper foil by using the regenerated material, acetylene black and PVDF in a mass ratio of 96.2:2:1.8, and establishing a negative electrode material of the regenerated soft package battery on the copper foil by using graphite, a carbon conductive agent, CMC and LA133 in a mass ratio of 95:2:1: 2; wherein the mass load of the anode material on the aluminum foil is 21 +/-0.5 mg/cm2The mass load of the negative electrode material on the copper foil is 10.8 +/-0.2 mg/cm2。
Comparative example
In order to obtain the performance of the NCM ternary material after repair and regeneration more intuitively, the recovered waste lithium ion battery is used as a comparative example for performance detection.
In order to obtain the performance difference between the regenerated soft package battery made of the regenerated NCM ternary material and the comparative example, the charge-discharge characteristic test is carried out on the regenerated soft package battery and the comparative example to obtain a charge-discharge characteristic curve, and the result is shown in figure 1, wherein waste is the waste NCM ternary material, and regenerate is the regenerated NCM ternary material. The charging and discharging rates of the battery are 0.1C, 0.2C, 0.5C, 1C, 2C and 5C in sequence in the test process. As can be seen from fig. 1, the waste NCM ternary material of the comparative example has poor charge and discharge characteristics; and the regenerated NCM ternary material in the embodiment shown in FIG. 2 has better charge-discharge curve retention rate, higher capacity and obviously better performance than the comparative example.
Please refer to the results of the cycle performance test of the regenerated NCM ternary material obtained in the embodiments of the present invention shown in fig. 2 to fig. 3, wherein waste is the waste NCM ternary material, and regenerate is the regenerated NCM ternary material. In fig. 2, the multiplying power curve of the regenerated NCM ternary material is compared with that of the waste NCM ternary material of the comparative example, and the test process adopts 0.1C, 0.2C, 0.5C, 1C, 2C, 5C and 0.5C, and it can be seen from fig. 2 that the data result of the regenerated NCM ternary material is obviously higher than that of the waste NCM ternary material.
Fig. 3 is a structure of a cycle curve of a pouch battery manufactured by regenerating an NCM ternary material in an embodiment, wherein the charge and discharge capacity of 0.1C activation is positioned in the first 3 circles, and the activation is beneficial to the formation of dense SEI and CEI films on the surface of the material, so that a better cycle performance is obtained, and then 1C charge and discharge are performed. The open circles at the top indicate the change of the coulombic efficiency of the material with the cycle number, wherein the coulombic efficiency is close to 100 percent, and the cycle performance of the material is good. As can be seen in fig. 3: after the regenerated soft package battery made of the regenerated NCM ternary material is circulated for 500 circles, the corresponding coulombic efficiency of the regenerated NCM ternary material is close to 100%, and the fact that the ternary material regenerated according to the method provided by the embodiment can recover good circulation performance is shown. As can be seen from the lower curve in fig. 3, the capacity of the regenerated soft-package battery made of the regenerated NCM ternary material does not change much after 500 cycles, and the retention rate is 94.25%, which indicates that the capacity of the regenerated ternary NCM material can be continuously maintained at a higher level after cycles according to the method provided in this embodiment, and the requirement of practical application can be met.
The CV curves of the regenerated pouch cells produced by regenerating the NCM ternary material of the examples were further analyzed, and the results are shown in fig. 4. As can be seen from fig. 4, the performance of the first three circles of the CV test battery is also relatively stable, and the polarization is relatively small and is 0.049V, which illustrates that the method provided by the embodiment has a relatively good regenerative repair effect on the NCM ternary material. Fig. 5 is a GITT diagram of the regenerated pouch battery of the regenerated NCM ternary material according to the embodiment, and as can be seen from fig. 5, the charge-discharge curve symmetry line of the regenerated pouch battery of the regenerated NCM ternary material is better, and the coulombic efficiency is higher, although the ion diffusion coefficients of the charge branch and the discharge branch of the GITT diagram are not overlapped, the ion diffusion coefficients tend to be stable and overlapped from the second circle, and the coulombic efficiency is improved.
In conclusion, the invention provides an NCM ternary material regeneration method and a regenerated material evaluation method based on an ion intervention method, wherein a regenerated NCM ternary material is obtained by carrying out treatment processes such as dissolution, hydrothermal treatment, high-temperature calcination and the like on an NCM ternary positive electrode material in a commercial waste lithium ion battery; and the regenerated NCM ternary material is combined with acetylene black and PVDF to serve as a positive electrode material, graphite, a carbon conductive agent, CMC and LA133 serve as a negative electrode material to establish a regenerated soft package battery, and the long-period performance of the regenerated NCM ternary material is evaluated to obtain the regenerated NCM ternary material with excellent performance. By the method, the regenerated NCM ternary material with recycling significance and excellent performance can be obtained, the recycling of the NCM ternary cathode material in the lithium ion battery is realized, the problem of resource shortage of the lithium ion battery material is favorably solved, the resource is saved, and the pollution to the ecological environment caused by the improper treatment of the lithium ion battery as garbage is avoided.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.