CN108346838B - Method for recovering positive active material of lithium ion battery - Google Patents
Method for recovering positive active material of lithium ion battery Download PDFInfo
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- CN108346838B CN108346838B CN201810356153.8A CN201810356153A CN108346838B CN 108346838 B CN108346838 B CN 108346838B CN 201810356153 A CN201810356153 A CN 201810356153A CN 108346838 B CN108346838 B CN 108346838B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Abstract
A method of recovering a positive active material of a lithium ion battery, the method comprising: mixing the anode active material of the waste lithium ion battery with electrolyte to prepare anode slurry; taking the positive slurry and a positive current collector as a positive electrode; taking a lithium source and a negative current collector as a negative electrode; separating the positive electrode from the negative electrode by a separator; connecting the positive electrode current collector and the negative electrode current collector with a load, wherein a positive electrode-diaphragm-negative electrode-load forms a loop discharge, and lithium ions of the lithium source flow into the positive electrode slurry through the diaphragm to supplement the lithium ions to the positive active material; the positive active material is separated from the positive slurry, so that the positive active material of the waste lithium ion battery can be activated, the waste lithium ion battery is recycled and utilized, and the environment is not polluted.
Description
Technical Field
The invention relates to the field of lithium ion batteries, in particular to a method for recovering a positive electrode active material of a lithium ion battery.
Background
The lithium ion battery has excellent characteristics of small volume, high power density, long cycle life, high voltage, low self-discharge and the like, and is widely applied to various portable electronic devices, particularly the fields of mobile phones, personal computers, cameras, energy storage, transportation and the like. During the use process of the lithium ion battery, some irreversible side reactions can occur, which lead to the loss of a lithium source of an active material of the lithium ion battery, and along with the loss of the lithium source, the service life of the lithium ion battery is reduced until the lithium ion battery is scrapped. If the waste lithium ion battery directly enters soil landfill or is treated along with domestic garbage, serious soil pollution can be caused. If the waste lithium ion battery is crushed and then subjected to acid treatment to extract precious metals, the environment is polluted, and the cost and the energy consumption are high.
Disclosure of Invention
In view of the above, there is a need to provide a method for recovering a positive electrode active material of a lithium ion battery, which can activate a waste positive electrode active material of the lithium ion battery, realize the recovery and utilization of the high-grade positive electrode active material of the lithium ion battery, and does not pollute the environment.
The present invention provides a method of recovering a positive active material of a lithium ion battery, the method comprising:
mixing the anode active material of the waste lithium ion battery with electrolyte to prepare anode slurry;
taking the positive slurry and a positive current collector as a positive electrode;
taking a lithium source and a negative current collector as a negative electrode;
separating the positive electrode from the negative electrode by a separator;
connecting the positive electrode current collector and the negative electrode current collector with a load, wherein a positive electrode-diaphragm-negative electrode-load forms a loop discharge, and lithium ions of the lithium source flow into the positive electrode slurry through the diaphragm to supplement the lithium ions to the positive active material;
separating the positive electrode active material from the positive electrode slurry.
Preferably, the lithium source is a negative electrode slurry prepared by mixing a negative electrode active material of the waste lithium ion battery with an electrolyte, or a negative electrode slurry prepared by mixing a negative electrode active material of the waste lithium ion battery mixed with lithium metal particles with an electrolyte, or an electrolyte mixed with lithium metal particles, or an electrolyte mixed with lithium metal sheets.
Preferably, after separating the positive electrode active material from the positive electrode slurry, the method further comprises:
rinsing the separated positive active material with an organic solvent or water; drying the rinsed positive active material; and crushing, screening and packaging the dried positive active material.
Preferably, the volume ratio of the electrolyte to the positive electrode active material is 1: 9-9: 1.
Preferably, after lithium ions of the lithium source flow into the positive electrode slurry through the separator to replenish the positive electrode active material with lithium ions, the method further includes:
monitoring the discharge current, and finishing the discharge when the discharge current density is lower than a preset value; or
And monitoring the positive electrode slurry through XRD, and finishing discharging when the crystal lattice of the positive electrode active material in the positive electrode slurry reaches a preset state.
Preferably, after the positive electrode-separator-negative electrode-load forms a loop discharge and lithium ions of the lithium source flow into the positive electrode slurry through the separator to replenish lithium ions to the positive active material, the method further comprises:
and recovering the electric energy in the discharging process.
Preferably, the step of using the positive electrode slurry and the positive electrode current collector as a positive electrode comprises:
the positive pole slurry is filled in a positive pole liquid storage tank, the positive pole current collector is positioned in a positive pole reaction area, the positive pole current collector is made of stainless steel, aluminum alloy, titanium alloy or conductive non-metallic substances, and the positive pole slurry in the positive pole liquid storage tank passes through the positive pole reaction area under the pushing of a first power source.
Preferably, the negative electrode including the lithium source and the negative current collector comprises:
the lithium source is arranged in a negative liquid storage tank, the negative current collector is arranged in a negative reaction area, the material of the negative current collector is stainless steel, copper alloy, titanium alloy or conductive non-metallic substances, and the lithium source in the negative liquid storage tank passes through the negative reaction area under the pushing of a second power source; or
Arranging the lithium source and the negative current collector in a negative reaction area; or
The lithium source is arranged in a negative electrode reaction area, the negative electrode current collector forms the wall of a reaction vessel for accommodating the lithium source, and the positive electrode reaction area is arranged in the negative electrode reaction area.
Preferably, the separating the positive electrode and the negative electrode by a separator includes:
and separating the positive reaction area where the positive current collector is positioned and the negative reaction area where the negative current collector is positioned.
Preferably, the step of using the positive electrode slurry and the positive electrode current collector as a positive electrode comprises:
the positive electrode slurry is filled in a reaction container, the positive electrode current collector forms part of the wall of the reaction container, and the positive electrode slurry and the positive electrode current collector are arranged on one side of the reaction container;
the negative electrode using a lithium source and a negative current collector includes:
the lithium source is arranged in the reaction container, the negative current collector forms part of the wall of the reaction container, the lithium source and the negative current collector are arranged on the other side of the reaction container, and the negative current collector is electrically insulated from the positive current collector;
separating the positive electrode from the negative electrode by a separator comprises:
and separating the positive electrode slurry on one side of the positive electrode current collector from the lithium source on one side of the negative electrode current collector through a diaphragm.
According to the invention, when the anode electrode-diaphragm-cathode electrode-load forms a loop for discharging, lithium ions of a lithium source flow into the anode slurry through the diaphragm to supplement the lithium ions to the anode active material, so that the anode active material of the waste lithium ion battery is activated, the recovery and utilization of the waste lithium ion battery are realized, and the environment is not polluted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method of recovering a positive active material of a lithium ion battery according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view illustrating the principle of supplementing lithium ions to a positive electrode active material according to a first embodiment of the present invention.
Fig. 3 is a schematic view illustrating the principle of supplementing lithium ions to a positive electrode active material according to a second embodiment of the present invention.
Fig. 4 is a schematic view illustrating the principle of supplementing lithium ions to a positive electrode active material according to a third embodiment of the present invention.
Fig. 5 is a schematic view illustrating the principle of supplementing lithium ions to a positive electrode active material according to a fourth embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Spatially relative terms, such as "upper," "lower," "left," "right," "inner" and "outer," may be used herein for ease of description to describe one element or feature's relationship to other element(s) or feature(s) as illustrated in the figures. The device may be oriented differently (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The method for recovering the positive active material of the lithium ion battery is used for recovering the positive active material from the waste lithium ion battery. Referring to fig. 1, the method for recycling the positive active material of the lithium ion battery includes:
s101: and mixing the anode active material of the waste lithium ion battery with the electrolyte to prepare anode slurry.
The positive active material is obtained by discharging the waste lithium ion battery, disassembling, separating the positive plate and stripping the positive active material from the current collector of the positive plate. The positive active material may be one or a mixture of more of Lithium Cobaltate (LCO), lithium iron phosphate (LFP), Lithium Manganate (LMO), lithium Nickel Cobalt Manganese (NCM), lithium Nickel Cobalt Aluminate (NCA), Lithium Titanate (LTO), Lithium Nickel Manganese (LNM), and the like. The positive electrode active material is required to be crushed until the particle size of the particles is 100 nanometers to 10 micrometers before being mixed with the electrolyte. The positive active material can be crushed by a high-speed stirring crusher, a sand mill and other mechanical crushing modes.
The electrolyte is a mixture of an organic solvent, a lithium salt, and an additive. The organic solvent may be one or more of methyl ethyl carbonate, ethylene carbonate, dimethyl carbonate, propylene carbonate, fluoroethylene carbonate, etc. The proportion of the mass or volume of each organic solvent in the electrolyte may be 0.5-99.5%. The lithium salt of the electrolyte is lithium hexafluorophosphate or lithium bis (fluorosulfonyl) imide and the like. The concentration of lithium salt of the electrolyte is 0.5-1.5 mol/L. The additive may be one or more solvents of Vinylene Carbonate (VC), Succinonitrile (SN), Propylene Sulfite (PS), difluoro oxalic acid boric acid (ODFB), and the like. The proportion of the mass or volume of each additive in the electrolyte may be 0.1-10%. The volume ratio of the electrolyte to the positive electrode active material is 1: 9-9: 1. The viscosity of the mixture of the electrolyte and the positive electrode active material is 1-30000 centipoises.
The electronic conductivity of the anode slurry is 10^3 to 10^8 Siemens/second. The electronic conductivity of the positive electrode slurry can be enhanced by adding one or more composite conductive agents such as carbon nanotubes, graphene, or carbon black. The weight ratio of the conductive agent to the positive electrode active material is 0.1% -10%. The water content of the positive electrode slurry is less than one hundred million, the fluorine-containing content is less than one hundred million, and the pH value is between 5 and 9. The ambient relative humidity to which the positive electrode slurry is exposed is less than 1%.
S102: and taking the positive electrode slurry and the positive electrode current collector as positive electrodes.
The specific steps of taking the positive electrode slurry and the positive electrode current collector as positive electrodes are as follows:
the first scheme is as follows: referring to fig. 2, the positive electrode includes a positive liquid storage tank 10, the positive slurry 20, a first power source 30, the positive current collector 40, and a positive reaction area 50. The positive slurry 20 is loaded into the positive reservoir 10, and the positive current collector 40 is disposed in the positive reaction zone 50. The positive slurry 20 is added into the positive storage tank 10 in batches, or is continuously added into the positive storage tank 10. The material of the positive current collector 40 may be stainless steel, aluminum alloy, titanium alloy, or conductive non-metallic substance (such as carbon fiber, carbon cloth, etc.). The positive electrode liquid storage tank 10 passes through the positive electrode reaction zone 50 via the first power source 30 through a pipeline to form a positive electrode slurry loop.
Scheme II: referring to fig. 3, the structure and principle of the positive electrode in the second embodiment are the same as those of the positive electrode in the first embodiment, and are not described herein again.
The third scheme is as follows: referring to fig. 4, the structure and principle of the positive electrode in the third embodiment are similar to those of the positive electrode in the first embodiment, except that: the positive electrode current collector 40 is a stirring device.
And the scheme is as follows: referring to fig. 5, the positive electrode includes the positive slurry 20, the positive current collector 40, and a reaction vessel 60. The positive electrode slurry 20 is charged into the reaction container 60, the positive electrode current collector 40 forms a part of the wall of the reaction container 60, and the positive electrode slurry 20 and the positive electrode current collector 40 are disposed on one side of the reaction container 60.
S103: the lithium source and the negative current collector are used as a negative electrode.
According to different structures of the positive electrode in step S102, the correspondence between the lithium source and the negative current collector as the negative electrode may specifically be:
the first scheme is as follows: referring to fig. 2 again, the lithium source is a negative electrode slurry prepared by mixing a negative electrode active material of a used lithium ion battery with an electrolyte or a negative electrode slurry prepared by mixing a negative electrode active material of a used lithium ion battery mixed with lithium metal particles with an electrolyte. The negative electrode active material is obtained by discharging the waste lithium ion battery, disassembling, separating a negative plate and stripping the negative electrode active material from a current collector of the negative plate. The negative electrode includes the lithium source 70, a negative reservoir 80, a second power source 90, the negative current collector 100, and a negative reaction zone 110. The lithium source 70 is housed within the negative reservoir 80 and the negative current collector 100 is disposed in the negative reaction zone 110. The material of the negative electrode current collector 100 may be stainless steel, copper alloy, titanium alloy, or conductive non-metallic substance (e.g., carbon fiber, etc.). The negative liquid storage tank 80 passes through the negative reaction region 110 via the second power source 90 through a pipeline to form a lithium source circuit.
Scheme II: referring again to fig. 3, the lithium source is an electrolyte mixed with lithium metal particles or lithium metal flakes. The negative electrode includes the lithium source 70, the negative current collector 100, and a negative reaction region 110. The lithium source 70 and the negative current collector 100 are disposed in the negative reaction region 110.
The third scheme is as follows: referring to fig. 4 again, the structure and principle of the negative electrode are similar to those of the negative electrode in the second embodiment, except that: the lithium source 70 is disposed in the negative electrode reaction region 110, the negative electrode current collector 100 forms a wall of a reaction vessel for accommodating the lithium source 70, and the positive electrode reaction region 50 is disposed in the negative electrode reaction region 110.
And the scheme is as follows: referring again to fig. 5, the lithium source 70 is an electrolyte mixed with lithium metal particles or lithium metal flakes. The lithium source 70 is placed in the reaction container 60, the negative electrode current collector 100 forms a part of the wall of the reaction container 60, and the lithium source 70 and the negative electrode current collector 100 are disposed on the other side of the reaction container 60. The negative electrode current collector 100 is electrically insulated from the positive electrode current collector 40.
S104: the positive electrode and the negative electrode are separated by a separator.
According to different structures of the positive electrode in step S102, the step of separating the positive electrode from the negative electrode by the separator may specifically be:
the first scheme is as follows: referring again to fig. 2, the positive reaction area 50 where the positive current collector 40 is located and the negative reaction area 110 where the negative current collector 100 is located are separated by the separator 120. The positive reaction region 50 and the negative reaction region 110 are located at opposite sides of the separator 120. In the present embodiment, the positive electrode reaction region 50 is located at the left side of the separator 120, and the negative electrode reaction region 110 is located at the right side of the separator 120. In other embodiments, the positive electrode reaction region 50 and the negative electrode reaction region 110 are respectively located at the right and left sides, or the upper and lower sides, or the lower and upper sides of the separator 120.
Scheme II: referring to fig. 3 again, the way of separating the positive electrode and the negative electrode by the diaphragm is the same as the first scheme, which is not repeated herein.
The third scheme is as follows: referring again to fig. 4, the separator separates the positive electrode from the negative electrode in a similar manner as in the first embodiment, except that: in the present embodiment, the positive electrode reaction region 50 is located inside the separator 120, and the negative electrode reaction region 110 is located outside the separator 120. In other embodiments, the positive reaction zone 50 is located outside the separator 120 and the negative reaction zone 110 is located inside the separator 120.
And the scheme is as follows: referring again to fig. 5, the positive slurry 20 on the side of the positive current collector 40 is separated from the lithium source 70 on the side of the negative current collector 100 by the separator 120. In this embodiment, the cathode slurry 20 is located on the lower side of the separator 120, and the lithium source 70 is located on the upper side of the separator 120. In other embodiments, the positive slurry 20 and the lithium source 70 are respectively located on the upper and lower sides, or left and right sides, or right and left sides of the separator 120.
S105: and connecting the positive current collector and the negative current collector with a load, wherein a loop discharge is formed by a positive electrode, a diaphragm, a negative electrode and the load, and lithium ions of a lithium source of the negative electrode flow into the positive slurry through the diaphragm to supplement the lithium ions to the positive active material.
According to different structures of the positive electrode in step S102, connecting the positive electrode current collector and the negative electrode current collector to a load, wherein the positive electrode-diaphragm-negative electrode-load forms a loop discharge, and the flowing of the lithium ions from the lithium source into the positive electrode slurry through the diaphragm to supplement the lithium ions to the positive electrode active material may specifically be:
the first scheme is as follows: referring again to fig. 2, when the positive electrode current collector 40 and the negative electrode current collector 100 are connected to a load, the positive electrode slurry 20 undergoes a reduction reaction while passing through the positive electrode reaction region 50, and the lithium source 70 undergoes an oxidation reaction while passing through the negative electrode reaction region 110. At this time, the positive electrode-separator-negative electrode-load forms a loop discharge, and the lithium source 70 located in the negative reaction zone 110 forms lithium ions to flow into the positive slurry 20 through the separator 120 to replenish the positive active material with lithium ions.
Scheme II: referring to fig. 3 again, the positive electrode current collector 40 and the negative electrode current collector 100 are connected to a load, the positive electrode slurry 20 undergoes a reduction reaction while passing through the positive electrode reaction region 50, and the lithium source 70 undergoes an oxidation reaction while passing through the negative electrode reaction region 110. At this time, the positive electrode-separator-negative electrode-load forms a loop discharge, and the lithium source 70 located in the negative reaction zone 110 forms lithium ions to flow into the positive electrode slurry 20 through the separator 120 to replenish the positive active material with lithium ions.
The third scheme is as follows: referring to fig. 4 again, the working principle of the positive electrode and the negative electrode is similar to that of the second embodiment, except that: the positive electrode current collector 40 is used to stir the positive electrode slurry 20 so that the positive electrode active material in the positive electrode slurry 20 is in sufficient contact with the positive electrode current collector 40.
And the scheme is as follows: referring to fig. 5 again, the positive electrode current collector 40 and the negative electrode current collector 100 are connected to a load, the positive electrode slurry 20 undergoes a reduction reaction in the reaction container 60, and the lithium source 70 undergoes an oxidation reaction in the reaction container 60. At this time, the positive electrode-separator-negative electrode-load forms a circuit discharge, and the lithium source 70 located at one side of the negative current collector 100 forms lithium ions to flow into the positive electrode slurry 20 through the separator 120 to supplement the positive electrode active material with lithium ions.
S106: separating the positive electrode active material from the positive electrode slurry.
In this embodiment, the separation of the positive electrode active material from the positive electrode slurry is performed by a solid-liquid separation device to separate the positive electrode active material from the positive electrode slurry. The solid-liquid separation device separates the positive electrode active material from the positive electrode slurry in a filtration interception, centrifugal separation, gravity settling or other modes.
Further, after step S106, the method further includes:
rinsing the separated positive active material; drying the rinsed positive active material; and crushing, screening and packaging the dried positive active material.
The rinsing of the separated positive active material is a rinsing of the separated positive active material with an organic solvent or water. Wherein, the positive active material can be oscillated by applying ultrasonic waves during the rinsing process or cleaned by a supercritical fluid manner, thereby improving the cleaning efficiency. And the step of drying the rinsed positive active material is to dry the rinsed positive active material by a drying unit.
Further, after step S106, the method further includes:
separating the electrolyte from the positive slurry; and recovering and rectifying the separated electrolyte.
Further, between step S105 and step S106, the method further includes:
monitoring the discharge current, and finishing the discharge when the discharge current density is lower than a preset value (such as 0.001mA/cm 2); or monitoring the positive electrode slurry through XRD, and finishing the discharge when the crystal lattice of the positive electrode active material in the positive electrode slurry reaches a preset state.
When the discharge current density is lower than a preset value, the speed of the lithium ions in the negative electrode flowing into the positive electrode slurry through the diaphragm is lower than a preset value, and at the moment, the positive electrode active material in the positive electrode slurry is basically fully supplemented with the lithium ions, so that the discharge can be finished and the positive electrode active material can be separated from the positive electrode slurry. The detecting the anode slurry through XRD can be detecting the anode slurry through online or offline XRD. When the crystal lattice of the positive electrode active material in the positive electrode slurry reaches a preset state, the positive electrode active material substrate is fully supplemented with lithium ions, so that the discharge can be finished, and the positive electrode active material can be separated from the positive electrode slurry.
Further, between step S105 and step S106, the method further includes:
and recovering the electric energy in the discharge process of the positive electrode.
It should be understood that the above examples are only for illustrating the present invention and are not to be construed as limiting the present invention. It will be apparent to those skilled in the art that various other changes and modifications can be made in the technical spirit of the present invention within the scope of the appended claims.
Claims (10)
1. A method of recovering a positive active material of a lithium ion battery, the method comprising: mixing the anode active material of the waste lithium ion battery with electrolyte to prepare anode slurry; taking the positive slurry and a positive current collector as a positive electrode; taking a lithium source and a negative current collector as a negative electrode; separating the positive electrode from the negative electrode by a separator; connecting the positive electrode current collector and the negative electrode current collector with a load, wherein a positive electrode-diaphragm-negative electrode-load forms a loop discharge, and lithium ions of the lithium source flow into the positive electrode slurry through the diaphragm to supplement the lithium ions to the positive active material; separating the positive electrode active material from the positive electrode slurry.
2. The method of recovering a positive active material of a lithium ion battery according to claim 1, wherein: the lithium source is negative electrode slurry prepared by mixing a negative electrode active material of the waste lithium ion battery with an electrolyte, or negative electrode slurry prepared by mixing a negative electrode active material of the waste lithium ion battery mixed with lithium metal particles with an electrolyte, or an electrolyte mixed with the lithium metal particles, or an electrolyte mixed with lithium metal sheets.
3. The method of recovering a positive electrode active material of a lithium ion battery of claim 1, wherein after separating the positive electrode active material from the positive electrode slurry, the method further comprises: rinsing the separated positive active material with an organic solvent or water; drying the rinsed positive active material; and crushing, screening and packaging the dried positive active material.
4. The method of recovering a positive active material of a lithium ion battery according to claim 1, wherein: the volume ratio of the electrolyte to the positive electrode active material is 1: 9-9: 1.
5. The method of recovering a positive electrode active material of a lithium ion battery according to claim 1, wherein after lithium ions of the lithium source flow into the positive electrode slurry through the separator to replenish the positive electrode active material with lithium ions, the method further comprises: monitoring the discharge current, and finishing the discharge when the discharge current density is lower than a preset value; or monitoring the positive electrode slurry through XRD, and finishing the discharge when the crystal lattice of the positive electrode active material in the positive electrode slurry reaches a preset state.
6. The method of recovering a positive active material of a lithium ion battery according to claim 1, wherein after connecting the positive current collector and the negative current collector to a load, the positive electrode-separator-negative electrode-load forming a circuit discharge, and lithium ions of the lithium source flowing into the positive slurry through the separator to replenish lithium ions to the positive active material, the method further comprises: and recovering the electric energy in the discharging process.
7. The method of recovering a positive active material of a lithium ion battery according to claim 1, wherein the using the positive slurry and the positive current collector as a positive electrode comprises: the positive pole slurry is filled in a positive pole liquid storage tank, the positive pole current collector is positioned in a positive pole reaction area, the positive pole current collector is made of stainless steel, aluminum alloy, titanium alloy or conductive non-metallic substances, and the positive pole slurry in the positive pole liquid storage tank passes through the positive pole reaction area under the pushing of a first power source.
8. The method of recovering a positive active material of a lithium ion battery according to claim 7, wherein the using a lithium source and a negative current collector as a negative electrode comprises: the lithium source is arranged in a negative liquid storage tank, the negative current collector is arranged in a negative reaction area, the material of the negative current collector is stainless steel, copper alloy, titanium alloy or conductive non-metallic substances, and the lithium source in the negative liquid storage tank passes through the negative reaction area under the pushing of a second power source; or the lithium source and the negative current collector are arranged in a negative reaction area; or the lithium source is arranged in the negative electrode reaction area, the negative electrode current collector forms the wall of a reaction vessel for accommodating the lithium source, and the positive electrode reaction area is arranged in the negative electrode reaction area.
9. The method of recovering a positive electrode active material of a lithium ion battery of claim 8, wherein separating the positive electrode from the negative electrode by a separator comprises: and separating the positive reaction area where the positive current collector is positioned and the negative reaction area where the negative current collector is positioned.
10. The method of recovering a positive active material of a lithium ion battery according to claim 1, wherein: the method for using the positive electrode slurry and the positive electrode current collector as a positive electrode comprises the following steps: the positive electrode slurry is filled in a reaction container, the positive electrode current collector forms part of the wall of the reaction container, and the positive electrode slurry and the positive electrode current collector are arranged on one side of the reaction container; the negative electrode using a lithium source and a negative current collector includes: the lithium source is arranged in the reaction container, the negative current collector forms part of the wall of the reaction container, the lithium source and the negative current collector are arranged on the other side of the reaction container, and the negative current collector is electrically insulated from the positive current collector; separating the positive electrode from the negative electrode by a separator comprises: and separating the positive electrode slurry on one side of the positive electrode current collector from the lithium source on one side of the negative electrode current collector through a diaphragm.
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