CN114204129A - Method for recycling agglomerated or hardened jelly formed in positive glue making process - Google Patents

Method for recycling agglomerated or hardened jelly formed in positive glue making process Download PDF

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CN114204129A
CN114204129A CN202111463295.2A CN202111463295A CN114204129A CN 114204129 A CN114204129 A CN 114204129A CN 202111463295 A CN202111463295 A CN 202111463295A CN 114204129 A CN114204129 A CN 114204129A
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jelly
stirring
dispersing
glue solution
nmp
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CN114204129B (en
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龚林
刘金成
刘建华
李圭善
代强
马雅洁
梁鑫
赵栓柱
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Hubei Eve Power Co Ltd
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Hubei Eve Power Co Ltd
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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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H01M4/623—Binders being polymers fluorinated polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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

The invention provides a method for recycling jelly formed in a positive pole glue making process, which comprises the following steps: (1) crushing jelly formed in the process of preparing the positive electrode jelly to obtain small jelly blocks; (2) mixing the small block jelly with NMP and an alcohol regulator, and stirring and dispersing to obtain a glue solution; (3) the solid content of the glue solution is adjusted, and the glue solution for standby is obtained through filtering treatment and iron removal treatment.

Description

Method for recycling agglomerated or hardened jelly formed in positive glue making process
Technical Field
The invention belongs to the technical field of battery materials, and relates to a method for recycling agglomerated or hardened jelly formed in a positive glue making process.
Background
The stirring and pulping process in the preparation process of the ternary lithium ion battery positive plate needs to use glue solution prepared from N-methyl pyrrolidone (NMP) and polyvinylidene fluoride (PVDF), the glue preparation process and the pulping process are usually separated in order to conveniently and efficiently carry out the pulping process, the properties of the solid content, the viscosity, the appearance and the like of the glue solution have great influence on the pulping effect, and the quality of the slurry directly influences the electrical property of the ternary lithium battery. In the process of continuously preparing the glue in large batch, a factory adopts a continuous automatic feeding system, PVDF with certain mass is put into NMP, and the PVDF is dissolved through the stirring and dispersing processes to prepare the glue solution for pulping.
In the continuous automatic glue making process, the PVDF forms aggregates on the inner wall and the bottom of the glue making tank, the stirring paddle, the dispersion disc, the feeding port and the inner wall of the glue making tank cover due to non-uniform dispersion and stirring, and hardened glue is formed seriously, so that the glue making tank needs to be cleaned regularly. These cleaned agglomerates and sheet-like jelly are typically disposed of as waste, which results in a significant waste of resources.
CN111100324A discloses a method and a device for recycling waste lithium battery binder PVDF, which comprises the steps of smashing electric cores of deep discharged waste lithium batteries, placing the smashed electric cores into a dissolving container which contains an organic solvent and is provided with a stirrer, dissolving the binder PVDF into the organic solvent, then opening a movable plate arranged on the dissolving container, placing the organic solvent containing PVDF into a filtering container for filtering, introducing a filtrate into a preheating device through a centrifugal pump for preheating, then introducing into a reduced pressure distillation tower for reduced pressure distillation, obtaining the waste lithium battery binder PVDF, introducing other metal ions in the process of soaking waste electric core fragments, leading steel shells of the waste lithium batteries to rust due to long service time, leading iron rust into the electric cores in the process of disassembling, and obtaining the PVDF with poor direct application effect.
CN111710932A discloses a method for recycling an adhesive of a retired lithium ion battery anode, which comprises the steps of firstly soaking retired lithium ion battery anode powder in an organic mixed solvent, then placing the organic mixed solvent in a reaction kettle, mechanically stirring to fully dissolve the adhesive, then separating by using a centrifugal machine to obtain the anode powder and an organic solution containing PVDF, separating and recycling the organic mixed solvent and PVDF by using a vacuum rotary evaporation evaporator, wherein the recycled PVDF cannot be used in a diameter mode.
The PVDF recovery method provided by the scheme has the problems that the recovered PVDF has low purity and cannot be directly utilized, so that the development of a simple PVDF recovery method which has high purity of the recovered PVDF and can be directly utilized is necessary.
Disclosure of Invention
The invention aims to provide a method for recycling agglomerated or hardened jelly formed in the process of preparing positive glue, which solves the problem of waste caused by agglomeration or hardening of PVDF (polyvinylidene fluoride) in the process of preparing the glue, and the recycled agglomerated or hardened jelly can be directly prepared into glue solution with NMP (N-methyl pyrrolidone) and PVDF for the pulping process.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for recycling agglomerated or hardened jelly formed in a positive glue making process, which comprises the following steps:
(1) crushing jelly formed in the process of preparing the positive electrode jelly to obtain small jelly blocks;
(2) mixing the small block jelly with NMP and an alcohol regulator, and stirring and dispersing to obtain a glue solution;
(3) adjusting the solid content of the glue solution, and obtaining the glue solution for standby after filtration treatment and iron removal treatment.
The method adopts a simple method to recycle the agglomerated or hardened jelly formed in the process of preparing the positive pole into the glue solution, the content of other impurity ions in the glue solution is lower, the purity of the binder is higher, the method has simple and environment-friendly flow, and the obtained glue solution can be directly used for the pulping process.
Preferably, the mass of the small lump jelly is m1, the mass of NMP is m2, and the mass of the alcohol additive is m 3.
Preferably, m1 and m2 satisfy the relation: 5% ≦ m1/(m1+ m2) ≦ 8%, for example: 5%, 5.5%, 6%, 6.5%, 7%, 8%, etc., preferably m1/(m1+ m2) ═ 6.
Preferably, m1, m2 and m3 satisfy the relation: 0.1% ≦ m3/(m1+ m2+ m3) ≦ 1%, for example: 0.1%, 0.3%, 0.5%, 0.7%, 1%, etc., preferably 0.5% m3/(m1+ m2+ m 3).
Preferably, the size of the small jelly in the step (1) is 0.1-10 cm2For example: 0.1cm2、0.5cm2、1cm2、2cm2、5cm2、8cm2Or 10cm2And the like.
Preferably, the alcohol modifier in step (2) comprises any one or a combination of at least two of ethanol, propanol, butanol or n-propanol, preferably n-propanol.
Preferably, the stirring and dispersing temperature in the step (2) is 40-70 ℃, for example: 40 deg.C, 45 deg.C, 50 deg.C, 60 deg.C or 70 deg.C, etc.
Preferably, the degree of vacuum for stirring and dispersing is less than or equal to-80 Kpa.
Preferably, the rotation speed of the stirring in the step (2) is 20-30rpm, for example: 20rpm, 22rpm, 25rpm, 28rpm, 30rpm, or the like.
Preferably, the stirring time is 1-2 h, such as: 1h, 1.2h, 1.5h, 1.8h or 2h and the like.
Preferably, the dispersing speed of the step (2) is 1000-1300 rpm, for example: 1000rpm, 1050rpm, 1100rpm, 1200rpm, 1300rpm, or the like.
Preferably, the dispersing time is 2-3 h, such as: 2h, 2.2h, 2.5h, 2.8h or 3h and the like.
Preferably, the method for adjusting the solid content of the glue solution in the step (3) is to add NMP or PVDF.
Preferably, the solid content of the glue solution is adjusted and then stirring and dispersing are carried out.
Preferably, the stirring and dispersing time is 1-2 h, such as: 1h, 1.2h, 1.5h, 1.8h or 2h and the like.
Preferably, the filter mesh number of the filtering treatment in the step (3) is 200-400 meshes, such as: 200 meshes, 220 meshes, 250 meshes, 300 meshes, 400 meshes and the like.
Preferably, the device for removing iron in the step (3) comprises an iron remover.
Preferably, the iron remover is made of stainless steel.
Compared with the prior art, the invention has the following beneficial effects:
the method provided by the invention has the advantages that the agglomerated or hardened jelly formed in the process of preparing the positive electrode glue is recycled by a simple method and is prepared into the glue solution, the prepared glue solution has high purity, the effect is similar to that of the binder glue solution prepared by a conventional method, the recycling of the waste agglomerated and hardened PVDF in the glue preparation process is realized, the method is low in cost and is green and environment-friendly.
Drawings
FIG. 1 is a 24-hour viscosity change plot of a cement paste prepared from a cement obtained by the recovery method described in example 1.
FIG. 2 is a 24-hour viscosity change curve of a continuous normally produced slurry of the glue solution described in comparative example 1.
Fig. 3 is a comparative graph of the coating adhesion test after the pastes described in example 1 and comparative example 1 were made into paste, a1, a2 and A3 are bar graphs of the coating adhesion of the pastes described in example 1 and comparative example 1 on the front side of the aluminum foil tested three times, and B1, B2 and B3 are bar graphs of the coating adhesion of the pastes described in example 1 and comparative example 1 on the back side of the aluminum foil tested three times.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a method for recycling agglomerated or hardened jelly formed in a positive pole jelly making process, which comprises the following steps:
(1) cutting the collected agglomerated or hardened jelly into pieces of 6cm2Weighing 55kg of small blocks, putting the small blocks into a stainless steel stirring tank with the volume of 1000L, adding 850kg of N-methylpyrrolidone (NMP) and 5.02kg of N-propanol into the stainless steel stirring tank, setting the temperature of the stirring tank to be 50 ℃, setting the vacuum degree to be-80 kPa, setting the stirring speed to be 25rpm, setting the dispersion speed to be 1200rpm, stirring and dispersing for 4 hours, setting m1/(m1+ m2) to be 6%, and setting m3/(m1+ m2+ m3) to be 0.55%;
(2) stopping dispersion, cooling to 23 ℃, breaking vacuum, sampling and detecting the solid content of the glue solution, wherein the measured value is 5.13%;
(3) 8.33kg of PVDF powder is added, the temperature of a stirring tank is set to be 50 ℃, the vacuum degree is set to be-80 kPa, the dispersion speed is 1200rpm, stirring and dispersion are carried out for 2h, dispersion is stopped, the temperature is cooled to be 23 ℃, vacuum is broken, the solid content of the glue solution is sampled and detected, the measured value is 6.25 percent, the solid content meets the production requirement, the glue solution is transported through a 300-mesh filter and an iron remover through a diaphragm pump and is transferred to a storage tank to be used in the pulping process.
Example 2
The embodiment provides a method for recycling agglomerated or hardened jelly formed in a positive pole jelly making process, which comprises the following steps:
(1) cutting the collected agglomerated or hardened jelly into pieces with a size of 8cm by a ceramic cutter2Weighing 60kg of small blocks, putting the small blocks into a stainless steel stirring tank with the volume of 1000L, adding 800kg of N-methylpyrrolidone (NMP) and 5kg of N-propanol into the stainless steel stirring tank, setting the temperature of the stirring tank at 50 ℃, setting the vacuum degree at-80 kPa, setting the stirring speed at 25rpm, setting the dispersion speed at 1200rpm, stirring and dispersing for 4 hours, setting m1/(m1+ m2) to 7%, and setting m3/(m1+ m2+ m3) to 0.58%;
(2) stopping dispersion, cooling to 23 ℃, breaking vacuum, sampling and detecting the solid content of the glue solution, wherein the measured value is 5.25%;
(3) adding 7.56kg of PVDF powder, setting the temperature of a stirring tank to be 50 ℃, setting the vacuum degree to be-80 kPa, setting the dispersion speed to be 1200rpm, stirring and dispersing for 2h, stopping dispersing, cooling to 23 ℃, breaking vacuum, sampling and detecting the solid content of the glue solution, wherein the measured value is 6.25%, the solid content meets the production requirement, and the glue solution is transported through a 300-mesh filter and an iron remover by a diaphragm pump, transferred to a storage tank and used in the pulping process.
Example 3
This example differs from example 1 only in that the NMP used in step (1) had a mass of 600kg, the other conditions and parameters were exactly the same as in example 1, and m1/(m1+ m2) was 8.3%.
Example 4
This example differs from example 1 only in that the NMP mass in step (1) is 1050kg, the other conditions and parameters are exactly the same as in example 1, and m1/(m1+ m2) is 4.9%.
Example 5
This example differs from example 1 only in that the mass of n-propanol in step (1) is 10kg, the other conditions and parameters are exactly the same as in example 1, and m3/(m1+ m2+ m3) ═ 1.1%.
Example 6
This example differs from example 1 only in that the mass of n-propanol in step (1) is 0.8kg, the other conditions and parameters are exactly the same as in example 1, and m3/(m1+ m2+ m3) ═ 0.088%.
Comparative example 1
This comparative example differs from example 1 only in that the agglomerated or caked gum described in step (1) is replaced by PVDF powder, the other conditions and parameters being exactly the same as those of example 1.
And (3) performance testing:
mixing the glue solutions obtained in examples 1-6 and comparative example 1 with NCM523, NCM811, conductive carbon SP, conductive carbon KS-6 and NMP according to a certain mass ratio, preparing slurry through the procedures of powder dry mixing, pre-kneading, stirring, dispersing and the like, wherein the stirring speed is 15rpm, the dispersing speed is 9000rpm, the powder dry mixing temperature is less than or equal to 45 ℃, the dispersing temperature is less than or equal to 60 ℃, the cooling water temperature is 15 ℃, conveying the obtained slurry into a 600L transfer tank through a 300-mesh filter and an iron remover by a diaphragm pump, the storage tank is provided with a motor stirring and vacuum system, the motor stirring speed is 20-30rpm, the vacuumizing and defoaming time is not less than 60 minutes, conveying the slurry in the 600L transfer tank through the diaphragm pump, passing through a 300-mesh filter, transferring the iron remover into a 60L storage tank, transferring to an extrusion coating die head by the screw pump, coating the pole piece by drying, Rolling, cutting, winding, assembling, cleaning, injecting, forming, standing at normal temperature and other processes to obtain a 18650 cylindrical battery, wherein the theoretical capacity of the battery is 2500mAh, the voltage is 3.6V, the discharge cut-off voltage is 2.5V, the charging temperature range is 0-60 ℃, the discharging temperature range is-20-80 ℃, the battery is discharged to 2.5V at the current of 0.5A at room temperature (25 ℃), is kept for 10min, is charged to 4.2V at the constant current of 4A and is converted into constant voltage, the charging is stopped when the charging current is reduced to 0.1A, is kept for 10min after charging, is discharged to 2.5V at the current of 10A respectively, the cut-off temperature of 75 ℃ is set, is kept for 30min, the steps are repeated for 200 weeks, a cycle number-energy conservation rate curve is drawn, the cycle performance is tested at the cycle of 200 weeks, and the test results are shown in Table 1:
TABLE 1
Figure BDA0003390249530000071
Figure BDA0003390249530000081
As can be seen from Table 1, when comparing examples 1-6 with comparative example 1, the method of the present invention recovers agglomerated or hardened jelly to obtain a paste, the paste prepared from the paste has stable viscosity and solid content, the fluctuation range is small, and the capacity retention rate of the prepared battery 10A can reach 93.6% or more after 200 weeks of circulation.
Comparing example 1 with examples 3-4, the NMP added in step (1) can affect the recovery effect of jelly, the relation between the NMP mass (m2) and the jelly mass (m1) is controlled to be 5% to m1/(m1+ m2) to 8%, the recovery effect of jelly is better, and if the NMP added in step (1) exceeds the range, the effect of preparing slurry is reduced to different degrees.
As can be seen from comparison of examples 1 and 5-6, the addition of the alcohol additive in step (1) affects the recovery effect of the gum, and the relationship between the mass of the alcohol additive (m3) and the mass of the gum (m1) and the mass of NMP (m2) is controlled to be 0.1% or less and m3/(m1+ m2+ m3) or less and 1%, so that the recovery effect of the gum is better, and if the mass is beyond this range, the effect after slurry preparation is reduced to different degrees.
After the glue solutions obtained in example 1 and comparative example 1 are made into slurry, viscosity change of the slurry is tested for 24h respectively, the test result of example 1 is shown in figure 1, the test result of comparative example 1 is shown in figure 2, the slurry obtained in example 1 and comparative example 1 is subjected to a coating adhesion force test, the coating adhesion force test is shown in figure 3, the coating mode is extrusion type double-sided coating, wherein A1-A3 is the peeling force tested by coating on the smooth surface of an aluminum foil, B1-B3 is the peeling force tested by coating on the rough surface of the aluminum foil, and the test method refers to GB/T2791-.
Compared with the comparative example 1, the method has the advantages that the agglomerated or hardened jelly formed in the positive glue making process is recycled by a simple method and is prepared into the glue solution, the purity of the prepared glue solution is high, the effect is similar to that of the adhesive glue solution prepared by a conventional method, the recycling and reusing of the recycled and discarded agglomerated and hardened PVDF in the glue making process are realized, the cost is low, and the method is green and environment-friendly.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (10)

1. A method for recycling agglomerated or hardened jelly formed in a positive pole jelly making process is characterized by comprising the following steps:
(1) crushing jelly formed in the process of preparing the positive electrode jelly to obtain small jelly;
(2) mixing the small block jelly with NMP and an alcohol regulator, and stirring and dispersing to obtain a glue solution;
(3) adjusting the solid content of the glue solution, and obtaining the glue solution for standby after filtration treatment and iron removal treatment.
2. The method of claim 1, wherein the mass of the small piece jelly is m1, the mass of NMP is m2, and the mass of the alcohol conditioning agent is m 3;
preferably, m1 and m2 satisfy the relation: m1/(m1+ m2) is not more than 5%, preferably m1/(m1+ m2) is not more than 6%;
preferably, m1, m2 and m3 satisfy the relation: m3/(m1+ m2+ m3) is 0.1% or more and 1% or less, preferably m3/(m1+ m2+ m3) is 0.5%.
3. The method of claim 1 or 2, wherein the size of the small pieces of jelly in step (1) is 0.1-10 cm2。
4. The method of any one of claims 1 to 3, wherein the alcohol modifier of step (2) comprises any one or a combination of at least two of ethanol, propanol, butanol or n-propanol, preferably n-propanol.
5. The method according to any one of claims 1 to 4, wherein the temperature for stirring and dispersing in step (2) is 40 to 70 ℃;
preferably, the degree of vacuum for stirring and dispersing is less than or equal to-80 Kpa.
6. The method according to any one of claims 1 to 4, wherein the stirring in step (2) is performed at a speed of 20 to 30 rpm;
preferably, the stirring time is 1-2 h.
7. The method according to any one of claims 1 to 4, wherein the dispersing speed in step (2) is 1000 to 1300 rpm;
preferably, the dispersing time is 2-3 h.
8. The method according to any one of claims 1 to 7, wherein the adjusting of the solids content of the dope in the step (3) is performed by adding NMP or PVDF;
preferably, the solid content of the glue solution is adjusted and then stirring and dispersing are carried out;
preferably, the stirring and dispersing time is 1-2 h.
9. The method according to any one of claims 1 to 7, wherein the filtration treatment of step (3) has a mesh number of 200 to 400;
preferably, the material of the filter is stainless steel.
10. The method according to any one of claims 1 to 9, wherein the apparatus for iron removal treatment of step (3) comprises an iron remover;
preferably, the iron remover is made of stainless steel.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166331A (en) * 2003-12-01 2005-06-23 Shin Kobe Electric Mach Co Ltd Manufacturing method of lithium ion secondary battery
WO2008034295A1 (en) * 2006-09-19 2008-03-27 Shenzhen Bak Battery Co., Ltd A lithium ion battery electrode plate,a lithium ion battery electrode core and the preparation method of the same
KR101648693B1 (en) * 2016-03-18 2016-09-22 주식회사 피엠알 Valuable metals recovery system from the waste slurry of lithium secondary battery
CN111100324A (en) * 2019-12-31 2020-05-05 陕西科技大学 Method and device for recovering waste lithium battery binder PVDF
CN111564631A (en) * 2020-03-27 2020-08-21 惠州市恒泰科技股份有限公司 Lithium ion battery positive glue solution and preparation method thereof
CN111710932A (en) * 2020-08-11 2020-09-25 湖南省正源储能材料与器件研究所 Method for recovering binder of retired lithium ion battery anode
CN111933891A (en) * 2020-07-27 2020-11-13 海口安博尔能源技术开发有限公司 Battery pole piece and processing method thereof
CN112246835A (en) * 2020-10-04 2021-01-22 湖南金源新材料股份有限公司 Method for disassembling and separating waste lithium ion batteries

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166331A (en) * 2003-12-01 2005-06-23 Shin Kobe Electric Mach Co Ltd Manufacturing method of lithium ion secondary battery
WO2008034295A1 (en) * 2006-09-19 2008-03-27 Shenzhen Bak Battery Co., Ltd A lithium ion battery electrode plate,a lithium ion battery electrode core and the preparation method of the same
KR101648693B1 (en) * 2016-03-18 2016-09-22 주식회사 피엠알 Valuable metals recovery system from the waste slurry of lithium secondary battery
CN111100324A (en) * 2019-12-31 2020-05-05 陕西科技大学 Method and device for recovering waste lithium battery binder PVDF
CN111564631A (en) * 2020-03-27 2020-08-21 惠州市恒泰科技股份有限公司 Lithium ion battery positive glue solution and preparation method thereof
CN111933891A (en) * 2020-07-27 2020-11-13 海口安博尔能源技术开发有限公司 Battery pole piece and processing method thereof
CN111710932A (en) * 2020-08-11 2020-09-25 湖南省正源储能材料与器件研究所 Method for recovering binder of retired lithium ion battery anode
CN112246835A (en) * 2020-10-04 2021-01-22 湖南金源新材料股份有限公司 Method for disassembling and separating waste lithium ion batteries

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