CN109411844A - A kind of separation method of anode slice of lithium ion battery and active material - Google Patents
A kind of separation method of anode slice of lithium ion battery and active material Download PDFInfo
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- CN109411844A CN109411844A CN201811267354.7A CN201811267354A CN109411844A CN 109411844 A CN109411844 A CN 109411844A CN 201811267354 A CN201811267354 A CN 201811267354A CN 109411844 A CN109411844 A CN 109411844A
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- cleaning solution
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- 239000011149 active material Substances 0.000 title claims abstract description 21
- 238000000926 separation method Methods 0.000 title claims abstract description 14
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 64
- 238000005406 washing Methods 0.000 claims abstract description 41
- 238000009835 boiling Methods 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 15
- 239000006166 lysate Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000004064 recycling Methods 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 21
- 238000004090 dissolution Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 235000019441 ethanol Nutrition 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 14
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 229940113088 dimethylacetamide Drugs 0.000 description 3
- BCNBMSZKALBQEF-UHFFFAOYSA-N 1,3-dimethylpyrrolidin-2-one Chemical compound CC1CCN(C)C1=O BCNBMSZKALBQEF-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- -1 boiling point 203) Chemical compound 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 125000005909 ethyl alcohol group Chemical group 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Secondary Cells (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides the separation method of a kind of anode slice of lithium ion battery and active material, anode pole piece material is sent into tubular type dissolvers, and organic solvent A is added and is dissolved, obtains the first lysate；First lysate is filtered, collector and suspension are obtained, filtrate and powder will be obtained after suspension filtering；The collector and the powder are subjected to classification washing using solvent B respectively, obtain cleaning solution and solid.The present invention is firstly introduced into organic solvent A realization to the soak extraction of anode pole piece material, classification washing is carried out in reference solvent B, it efficiently solves in the prior art since Extraction solvent boiling point is excessively high, the higher technical problem of energy consumption in the drying process of pole piece mixture after isolation, and utilized again by classification washing and the recycling of solvent, improve detersive efficiency, the fractional dose for reducing low boiling point solvent and high boiling solvent, achievees the effect that energy-saving and emission-reduction.
Description
Technical field
The present invention relates to waste and old lithium ion batteries to reprocess technical field, more particularly to a kind of lithium ionic cell positive pole
The separation method of piece and active material.
Background technique
It is recycled in technique in lithium ion battery, battery pole piece is to be formed by active material, conductive agent by binder
Slurry is coated in collection liquid surface.In removal process, in order to recycle active material and collector, it is necessary to which introducing solvent will
Active material is separated with collector.Common method includes pyrolysismethod and solvent dissolution method.Pyrolysismethod is will by introducing high temperature
Binder pyrolysis, reduces the cementation of binder, so that active material is separated with collector.This method is in hot environment
Under, binder can decompose, and generate poisonous and hazardous gas, affect to environment.Solvent rule is by will be in pole piece
Binder be dissolved into solvent so that active material is separated with collector, this method is milder, as long as by technique it is excellent
Change the environmental pollution for avoiding solvent from generating, is then a kind of feasible technique.Currently, commonly being bonded in the manufacturing process of positive plate
Agent is Kynoar, therefore, can choose the stronger N-Methyl pyrrolidone of dissolubility or dimethyl in recovery process
Formamide equal solvent impregnates pole piece, and the binder in pole piece is dissolved, and realizes the separation of active material and collector.In order to improve
The separating effect of active material and current collector aluminum foil, the separation effect of active material and collector can be significantly improved by introducing ultrasound
Rate.At present this method the problem is that, high boiling solvent is separated with the evaporation of collector and powder.Due to extracting with having
Solvent boiling point is higher, by the way that in heat drying process, energy consumption is higher.It is particularly due to washing process and is also introduced into solvent, increase
Evaporation total amount is added.
Based on this, the prior art still has much room for improvement.
Summary of the invention
Present invention technical problem to be solved is to provide a kind of waste lithium ion cell anode active material dissolving method, with
Solve problem of the prior art.
To solve the above-mentioned problems, the present invention provides the separation side of a kind of anode slice of lithium ion battery and active material
Method, comprising the following steps:
Anode pole piece material is sent into tubular type dissolvers by step 1, and organic solvent A is added and is dissolved, and obtains first
Lysate；
Step 2 filters first lysate, obtains collector and suspension, will obtain after suspension filtering
Filtrate and powder；
The collector and the powder are respectively adopted solvent B and carry out classification washing by step 3, are obtained cleaning solution and are consolidated
State object.
The organic solvent A be dimethyl pyrrolidone, dimethylformamide, one of NN- dimethyl acetamide or
Several mixtures.
Further, the solvent B in step 3 is low boiling point solvent.
Further, the low boiling point solvent is water, ethyl alcohol and/or ether.
Further, ultrasonic probe is provided in tubular type dissolvers described in step 1.
Further, in the classification washing, using the solvent after the N+1 times washing, the washing as n-th washing is molten
Agent；
Wherein, N is positive integer.
Further, solid-liquid ratio=1g:(0.5-1.5 in tubular type dissolvers described in step 1) mL.
Further, the dissolution conditions of tubular type dissolvers described in step 1 are as follows:
Temperature is 50-80 DEG C；Dissolution time is 0.5-2 hours.
Further, it is collected after the solid that step 3 obtains being dried.
Further, cleaning solution step 3 obtained is fractionated, and recycles cleaning solution.
Further, the cleaning solution of recycling is utilized again；
The filtrate recycling that step 2 obtains is utilized again.
The beneficial effects of the present invention are:
The present invention is firstly introduced into organic solvent A realization to the soak extraction of anode pole piece material, is divided in reference solvent B
Grade washing, efficiently solves in the prior art since Extraction solvent boiling point is excessively high, pole piece mixture after isolation it is dried
The higher technical problem of energy consumption in journey, and utilized again by classification washing and the recycling of solvent, detersive efficiency is improved,
The fractional dose for reducing low boiling point solvent and high boiling solvent, achievees the effect that energy-saving and emission-reduction.
Detailed description of the invention
Fig. 1 is one embodiment of the invention flow chart.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.
As shown in Figure 1, the embodiment of the invention discloses the separation sides of a kind of anode slice of lithium ion battery and active material
Method, comprising the following steps:
Anode pole piece material is sent into tubular type dissolvers by step 1, and organic solvent A is added and carries out dissolution dissolution, is obtained
First dissolution lysate；Wherein, organic solvent A can be dimethyl pyrrolidone, dimethylformamide, NN- dimethylacetamide
One or more of amine mixture；Preferably, it is provided with ultrasonic probe in tubular type dissolvers, to carry out ultrasonic vibration extraction.
Step 2 filters first lysate, obtains collector and suspension, will obtain after suspension filtering
Filtrate and powder；Wherein, filtering is preferably filtered using pressure pressure filter.
The collector and the powder are carried out classification washing by step 3 respectively, obtain cleaning solution and solid, preferably
Collection is dried in obtained solid by ground, removes remaining cleaning solution, wherein the detergent that the classification washing uses
For low boiling point solvent, it is preferable that the low boiling point solvent is water and/or ethyl alcohol.
In some preferred embodiments of the present invention, in the classification washing, the solvent after being washed using the N+1 times, as
The cleaning solvent of n-th washing；Wherein, N is positive integer.
In some embodiments of the invention, solid-liquid ratio=1g:(0.5-1.5 in tubular type dissolvers described in step 1) mL,
The dissolution conditions of the tubular type dissolvers are as follows: temperature is 50-80 DEG C；Dissolution time is 0.5-2 hours.
In some embodiments of the present invention, for the goal of the invention for realizing energy-saving and emission-reduction, the washing that step 3 is obtained
Liquid is fractionated, and cleaning solution is recycled.And the cleaning solution of recycling is utilized again；The filtrate recycling that step 2 is obtained is again
Secondary utilization.
Embodiment 1
Anode pole piece material is sent into is arranged first by a kind of separation method of anode slice of lithium ion battery and active material
Have in the tubular type dissolvers of ultrasonic probe, and organic solvent A is added and is dissolved, obtains the first lysate；Wherein, organic solvent
A can be n-methyl-2-pyrrolidone；Solid-liquid ratio=1g:0.5mL in the tubular type dissolvers, the tubular type dissolvers
Dissolution conditions are as follows: temperature is 80 DEG C；Dissolution time is 0.5 hour；First lysate is filtered using pressure filter, is obtained
To collector and suspension, filtrate and powder will be obtained after suspension filtering；By the collector and the powder with low
Boiling point solvent carries out classification washing three times respectively, and the low boiling point solvent is water.Cleaning solution and solid are obtained, is consolidated what is obtained
Collection is dried in state object, wherein three times when classification washing, the solvent after being washed using second carries out first time washing, adopts
Solvent after being washed with third time carries out second and washs；Meanwhile being fractionated the solvent after the first washing, to recycle washing
Liquid is utilized the cleaning solution of recycling again；It is utilized again after the filtrate being obtained by filtration also is recycled simultaneously.
Embodiment 2
Anode pole piece material is sent into is arranged first by a kind of separation method of anode slice of lithium ion battery and active material
Have in the tubular type dissolvers of ultrasonic probe, and organic solvent A is added and is dissolved, obtains the first lysate；Wherein, organic solvent
A can be dimethylformamide；Solid-liquid ratio=1g:1.5 in the tubular type dissolvers) mL, the dissolution of the tubular type dissolvers
Condition are as follows: temperature is 50 DEG C；Dissolution time is 2 hours；First lysate is filtered using pressure filter, obtains afflux
Body and suspension will obtain filtrate and powder after suspension filtering；The collector and the powder low boiling point is molten
Agent carries out classification washing three times respectively, and the low boiling point solvent is ethyl alcohol.Cleaning solution and solid are obtained, the solid that will be obtained
Collection is dried, wherein three times when classification washing, the solvent after washing using second carries out first time washing, using the
Solvent after washing three times carries out second and washs；Meanwhile being fractionated the solvent after the first washing, to recycle cleaning solution,
The cleaning solution of recycling to be utilized again；It is utilized again after the filtrate being obtained by filtration also is recycled simultaneously.
Embodiment 3
Anode pole piece material is sent into is arranged first by a kind of separation method of anode slice of lithium ion battery and active material
Have in the tubular type dissolvers of ultrasonic probe, and organic solvent A is added and is dissolved, obtains the first lysate；Wherein, organic solvent
A can be dimethyl acetamide；Solid-liquid ratio=1g:1mL in the tubular type dissolvers, the dissolution conditions of the tubular type dissolvers
Are as follows: temperature is 60 DEG C；Dissolution time is 1 hour；First lysate is filtered using pressure filter, obtain collector and
Suspension will obtain filtrate and powder after suspension filtering；By the collector and powder low boiling point solvent point
Classification washing is not carried out three times, and the low boiling point solvent is ether.Cleaning solution and solid are obtained, obtained solid is carried out
It is dry to collect, wherein three times when classification washing, the solvent after being washed using second carries out first time washing, using third time
Solvent after washing carries out second and washs；Meanwhile being fractionated the solvent after the first washing, it, will to recycle cleaning solution
The cleaning solution of recycling is utilized again；It is utilized again after the filtrate being obtained by filtration also is recycled simultaneously.
Embodiment 4
Anode pole piece material is sent into is arranged first by a kind of separation method of anode slice of lithium ion battery and active material
Have in the tubular type dissolvers of ultrasonic probe, and organic solvent A is added and is dissolved, obtains the first lysate；Wherein, organic solvent
A can be NMP (n-methyl-2-pyrrolidone)；Solid-liquid ratio=1g:0.8mL in the tubular type dissolvers, the tubular type dissolution
The dissolution conditions of device are as follows: temperature is 65 DEG C；Dissolution time is 1.2 hours；First lysate was carried out using pressure filter
Filter, obtains collector and suspension, will obtain filtrate and powder after suspension filtering；By the collector and the powder
Carry out classification washing respectively with low boiling point solvent three times, the low boiling point solvent is ethyl alcohol.Cleaning solution and solid are obtained, will
To solid collection is dried, wherein three times when classification washing, the solvent after washing using second wash for the first time
It washs, the solvent after being washed using third time is carried out second and washed；Meanwhile being fractionated the solvent after the first washing, to return
Cleaning solution is received, the cleaning solution of recycling is utilized again；It is sharp again after the filtrate being obtained by filtration also is recycled simultaneously
With.
The embodiment of the present invention, which is solved, to carry out collector in positive plate in reference organic solvent A and with active material separates work
In skill, since the boiling point of solvent is higher, pole piece mixture (collector and active material and conductive agent) after isolation it is dry
The higher technical problem of energy consumption during dry introduces dual-solvent system creatively to solve this problem.That is, being firstly introduced into
Solvent A (n-methyl-2-pyrrolidone (abbreviation NMP, boiling point 203), dimethylformamide (abbreviation DMF, boiling point 153), N, N-
Dimethyl acetamide (abbreviation DMAC, boiling point 165)) (solid-liquid ratio: 1:0.5~1.5) is impregnated to battery anode slice, draw simultaneously
Enter ultrasonic vibration.After 1 hour or so, using filters pressing, the mixed slurry of current collector aluminum foil and powder and solvent is isolated.Then
Powder mixed slurry is filtered, and is respectively washed collector and powder with another kind solvent B (water, alcohols, ethers etc.), and
It is dry in drying box, while the solvent B reuse that recycling design evaporates.It washs in filtered solvent B and contains solvent A, then
By fractionation, by solvent A and solvent B separation and reuse.Using washing step by step, be effectively saved washing low boiling point solvent (water,
Ethyl alcohol etc.), can also reduce the later period distillate during energy consumption.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. the separation method of a kind of anode slice of lithium ion battery and active material, which comprises the following steps:
Anode pole piece material is sent into tubular type dissolvers by step 1, and organic solvent A is added and is dissolved, and obtains the first dissolution
Liquid；
Step 2 filters first lysate, obtains collector and suspension, will obtain filtrate after suspension filtering
And powder；
The collector and the powder are carried out classification washing using solvent B by step 3 respectively, obtain cleaning solution and solid.
2. the method according to claim 1, wherein the solvent B in step 3 is low boiling point solvent, boiling point
Range is 100 DEG C~40 DEG C.
3. according to the method described in claim 2, it is characterized in that, the low boiling point solvent is water, ethyl alcohol, and/or ether.
4. the method according to claim 1, wherein being provided with ultrasonic spy in tubular type dissolvers described in step 1
Head.
5. the method according to claim 1, wherein the classification washing in, using the N+1 time wash after it is molten
Agent, the cleaning solvent as n-th washing；
Wherein, N is positive integer.
6. the method according to claim 1, wherein solid-liquid ratio in tubular type dissolvers described in step 1=
1g:(0.5-1.5) mL.
7. the method according to claim 1, wherein the dissolution conditions of tubular type dissolvers described in step 1 are temperature
Degree is 50-80 DEG C；Dissolution time is 0.5-2 hours.
8. the method according to claim 1, wherein being collected after the solid that step 3 obtains is dried.
9. being returned the method according to claim 1, wherein the cleaning solution that step 3 is obtained is fractionated
Receive cleaning solution.
10. according to the method described in claim 8, it is characterized in that, the cleaning solution of recycling is utilized again；
The filtrate recycling that step 2 obtains is utilized again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267354.7A CN109411844A (en) | 2018-10-29 | 2018-10-29 | A kind of separation method of anode slice of lithium ion battery and active material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267354.7A CN109411844A (en) | 2018-10-29 | 2018-10-29 | A kind of separation method of anode slice of lithium ion battery and active material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453897A (en) * | 2003-05-29 | 2003-11-05 | 南开大学 | Recovery method for leftover and residue of positive electrode of lithium ion battery |
| KR20130076754A (en) * | 2011-12-28 | 2013-07-08 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | Separating and recovering method of current collector and positive electrode active material from positive electrode material for lithium ion battery |
| CN106953132A (en) * | 2017-02-24 | 2017-07-14 | 中南大学 | A kind of method for reclaiming anode material for lithium-ion batteries and collector |
-
2018
- 2018-10-29 CN CN201811267354.7A patent/CN109411844A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453897A (en) * | 2003-05-29 | 2003-11-05 | 南开大学 | Recovery method for leftover and residue of positive electrode of lithium ion battery |
| KR20130076754A (en) * | 2011-12-28 | 2013-07-08 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | Separating and recovering method of current collector and positive electrode active material from positive electrode material for lithium ion battery |
| CN106953132A (en) * | 2017-02-24 | 2017-07-14 | 中南大学 | A kind of method for reclaiming anode material for lithium-ion batteries and collector |
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