CN103985919B - The method of graphite and Copper Foil is reclaimed from scrap lithium ion battery negative plate - Google Patents
The method of graphite and Copper Foil is reclaimed from scrap lithium ion battery negative plate Download PDFInfo
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- CN103985919B CN103985919B CN201410244423.8A CN201410244423A CN103985919B CN 103985919 B CN103985919 B CN 103985919B CN 201410244423 A CN201410244423 A CN 201410244423A CN 103985919 B CN103985919 B CN 103985919B
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- 238000000034 method Methods 0.000 title claims abstract description 58
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000011889 copper foil Substances 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 33
- 239000010439 graphite Substances 0.000 title claims abstract description 33
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000000967 suction filtration Methods 0.000 claims abstract description 54
- 239000011259 mixed solution Substances 0.000 claims abstract description 53
- 238000001035 drying Methods 0.000 claims abstract description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 22
- 239000004744 fabric Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 239000007773 negative electrode material Substances 0.000 claims description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 8
- 239000000243 solution Substances 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
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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
-
- 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
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The method of graphite and Copper Foil is reclaimed from scrap lithium ion battery negative plate, the steps include: scrap lithium ion battery to be carried out discharge, disassemble, then negative plate is put into after the container that water and alcohol mixed solution are housed stirs certain hour and sieve, oversize use water cleans, after natural drying, obtain Copper Foil; After screenings is heated to 70-90 DEG C, carry out suction filtration, keep the temperature of solution before filtering to be 70-90 DEG C in suction filtration process, after suction filtration terminates, after thing washes with water in filter, after natural drying, obtain graphite.The present invention has easy to operate, low to separation equipment requirement, graphite compared with the prior art and Copper Foil separative efficiency is high and cost is low, do not produce the advantage of secondary pollution in separation process.
Description
Technical field
The present invention relates to the recovery and utilization technology of scrap lithium ion battery.
Background technology
Lithium ion battery has that volume is little, lightweight, energy density is large, operating voltage is high, have extended cycle life and the series of advantages such as memory-less effect, video camera, mobile phone, notebook computer, camera, Portable Measurement Instrument, charger baby etc. are widely used in, in addition, it is also following electric automobile, the selectable high-energy power power supply of energy-accumulating power station.After lithium ion battery useful life to the time limit, its follow-up reasonable process is the major issue that need solve.
At present, leftover pieces, electrode relic that the negative plate that scrap lithium ion battery obtains after disassembling or anode plate for lithium ionic cell production process produce, reclaim after needing the active material graphite on negative plate to be separated with basis material Copper Foil as last in next step process.First Chinese patent (CN201310656285) report negative electrode material of waste lithium ion battery put into be equipped with dilute sulfuric acid, watery hydrochloric acid, phosphoric acid,diluted, citric acid any one as the solution being separated solvent, make the method for graphite and Copper Foil separation and recovery.Second Chinese patent (CN201010253873) reports the useless ion battery battery core after by pulverizing and puts into KOH ethanolic solution, then adds NaHSO respectively
3filter after solution and distilled water, make the method that active material graphite is separated with basis material Copper Foil.3rd Chinese patent (CN201310312768) discloses a kind of method of the collector reclaimed in waste and old lithium ion battery, waste and old lithium ion battery is broken after discharging, disassembling, put into dilute acid soln to be stirred to negative electrode active material and to come off completely, then take out negative current collector Copper Foil.4th Chinese patent (CN200810115349) reports a kind of method of selective decoppering of waste lithium ion battery, by adopting the alkaline medium containing ammoniacal liquor to be infusion solution, being leached by copper and being transferred to leachate, copper is separated with active material.5th Chinese patent (CNCN201310306520) reports and negative plate is put into deionized water for stirring, and the bonding agent in pole piece dissolves, and reclaims respectively after negative electrode active material and Copper Foil Matrix separation.6th Chinese patent (CN201210162911) reports drops in water by scrap lithium ion battery cathode pole piece, adopting ultrasonic vibration to come off to carbon dust from Copper Foil obtains containing carbon negative pole material and Copper Foil matrix, through press filtration obtain Carbon anode again through washing-oven dry-roasting, obtain available carbon material used as anode.
The employing acid solution reported at present, alkaline solution make graphite on scrap lithium ion battery negative plate be separated with Copper Foil and reclaim the method for material with carbon element and Copper Foil, also exist that the requirement of separation process to corrosion protection of equipment is high, cost recovery is high, and before graphite and the separated rear further process of Copper Foil, need to consume the shortcoming that a large amount of water cleans graphite and Copper Foil.And the employing deionized water reported at present or water soaking used Li ion cell negative plate, then reclaiming the method for material with carbon element and Copper Foil after filtration, the viscosity also existed owing to filtering front solution is very large, makes the rate of filtration slowly shortcoming.
Summary of the invention
The object of this invention is to provide a kind of method reclaiming graphite and Copper Foil from scrap lithium ion battery negative plate.
The present invention is the method reclaiming graphite and Copper Foil from scrap lithium ion battery negative plate, steps of the method are:
(1) discharge process of carrying out 1-3h in the sodium hydrate aqueous solution of 0.1-1.0mol/L is at room temperature positioned over by collecting the scrap lithium ion battery come; After discharge process, the lithium ion battery scrapped is carried out craft and disassembles, obtain negative plate; Collect negative pole leftover pieces, negative pole relic that lithium ion battery manufacture process produces, obtain negative plate;
(2) proportions being 3:1 ~ 20:1 according to the volume of water and the volume ratio ml/ml of ethanol goes out mixed solution; negative plate is put into the container that mixed solution is housed by the ratio being then 1:20 ~ 1:50 according to the quality of negative plate and the volume ratio g/ml of mixed solution; stir 5 ~ 30min; in whipping process, the temperature of water is 15-50 DEG C, and mixing speed is 50 ~ 300r/min;
(3) after stopping stirring, the screen cloth being 6-10mm by the material aperture in container sieves, and after oversize use water cleans 1-3 time, then after natural drying, obtain Copper Foil, screenings is the mixed liquor containing negative electrode active material;
(4) after the screenings that step (3) obtains being heated to 70 ~ 90 DEG C, carry out suction filtration, keep the temperature of liquid before filtering to be 70 ~ 90 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 ~ 3 time with water in filter, then obtain graphite after natural drying.
The present invention has easy to operate, low to separation equipment requirement, graphite compared with the prior art and Copper Foil separative efficiency is high and cost is low, do not produce the advantage of secondary pollution in separation process.
Embodiment
Embodiment 1: the proportions being 5:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 100r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 2: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 8min with electric mixer with the mixing speed of 100r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 3: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 150r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 8mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.The separation rate of graphite and Copper Foil is 99.5%.
Embodiment 4: the proportions being 20:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 100r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 30 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 5: the proportions being 20:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 8min with electric mixer with the mixing speed of 100r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 30 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 6: the proportions being 5:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 200r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 8mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 90 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 90 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 7: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 10min with electric mixer with the mixing speed of 200r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 40 DEG C.After stopping stirring, the screen cloth being 8mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 90 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 90 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 8: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 8min with electric mixer with the mixing speed of 200r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 50 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 9: the proportions being 5:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 10min with electric mixer with the mixing speed of 50r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 2 times, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 10: the proportions being 20:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 10min with electric mixer with the mixing speed of 50r/min by the ratio being then 1:20 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 30 DEG C.After stopping stirring, the screen cloth being 8mm by the material aperture in container sieves, and after oversize water cleans 2 times, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 11: the proportions being 5:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 10min with electric mixer with the mixing speed of 150r/min by the ratio being then 1:50 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 40 DEG C.After stopping stirring, the screen cloth being 10mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 12: the proportions being 5:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 300r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 20 DEG C.After stopping stirring, the screen cloth being 10mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 13: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 5min with electric mixer with the mixing speed of 200r/min by the ratio being then 1:50 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 30 DEG C.After stopping stirring, the screen cloth being 10mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 80 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 80 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 14: the proportions being 10:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 10min with electric mixer with the mixing speed of 100r/min by the ratio being then 1:50 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 50 DEG C.After stopping stirring, the screen cloth being 6mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 70 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 70 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Embodiment 15: the proportions being 20:1 according to the volume of water and the volume ratio (ml/ml) of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed and is also stirred 8min with electric mixer with the mixing speed of 200r/min by the ratio being then 1:40 according to the quality of negative plate and the volume ratio (g/ml) of mixed solution, and in whipping process, the temperature of water is 40 DEG C.After stopping stirring, the screen cloth being 10mm by the material aperture in container sieves, and after oversize water cleans 1 time, after natural drying, obtains Copper Foil.After screenings being heated to 90 DEG C, carry out suction filtration, keep the temperature of filtering forward slip value liquid to be 90 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 time with water in filter, after natural drying, obtain graphite.
Claims (1)
1. reclaim the method for graphite and Copper Foil from scrap lithium ion battery negative plate, it is characterized in that, steps of the method are:
(1) discharge process of carrying out 1-3h in the sodium hydrate aqueous solution of 0.1-1.0mol/L is at room temperature positioned over by collecting the scrap lithium ion battery come; After discharge process, the lithium ion battery scrapped is carried out craft and disassembles, obtain negative plate; Collect negative pole leftover pieces, negative pole relic that lithium ion battery manufacture process produces, obtain negative plate;
(2) proportions being 3:1 ~ 20:1 according to the volume of water and the volume ratio ml/ml of ethanol goes out mixed solution, negative plate is put into the container that mixed solution is housed by the ratio being then 1:20 ~ 1:50 according to the quality of negative plate and the volume ratio g/ml of mixed solution, stir 5 ~ 30min, in whipping process, the temperature of mixed solution is 15-50 DEG C, and mixing speed is 50 ~ 300r/min;
(3) after stopping stirring, the screen cloth being 6-10mm by the material aperture in container sieves, and after oversize use water cleans 1-3 time, then after natural drying, obtain Copper Foil, screenings is the mixed liquor containing negative electrode active material;
(4) after the screenings that step (3) obtains being heated to 70 ~ 90 DEG C, carry out suction filtration, keep the temperature of liquid before filtering to be 70 ~ 90 DEG C, after suction filtration terminates in suction filtration process, after thing washes 1 ~ 3 time with water in filter, then obtain graphite after natural drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410244423.8A CN103985919B (en) | 2014-06-05 | 2014-06-05 | The method of graphite and Copper Foil is reclaimed from scrap lithium ion battery negative plate |
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| CN201410244423.8A CN103985919B (en) | 2014-06-05 | 2014-06-05 | The method of graphite and Copper Foil is reclaimed from scrap lithium ion battery negative plate |
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| CN103985919B true CN103985919B (en) | 2016-03-16 |
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| CN104577250A (en) * | 2015-01-15 | 2015-04-29 | 兰州理工大学 | Repair regeneration method of lithium manganate positive electrode active material in waste lithium ion battery |
| CN107317048A (en) * | 2017-05-26 | 2017-11-03 | 金川集团股份有限公司 | The method that copper foil and graphite are reclaimed from negative electrode material of waste lithium ion battery |
| CN108565521A (en) * | 2018-04-27 | 2018-09-21 | 华南师范大学 | A kind of method directly recycling graphite cathode material |
| CN110238165A (en) * | 2019-06-26 | 2019-09-17 | 天津赛德美新能源科技有限公司 | A kind of separation equipment of lithium battery cathode plate dismantling |
| CN110759341B (en) * | 2019-10-30 | 2022-02-08 | 深圳中科瑞能实业有限公司 | Method for recycling graphite material based on aluminum-graphite double-ion battery |
| CN111792642B (en) * | 2020-08-06 | 2021-12-21 | 中国科学院过程工程研究所 | Method and equipment for stripping negative plate of retired battery and deeply removing impurities from graphite |
| CN112614971A (en) * | 2020-12-16 | 2021-04-06 | 东莞市和鸿升新材料科技有限公司 | Recycling method of retired lithium ion battery negative electrode material |
| CN113410534A (en) * | 2021-06-23 | 2021-09-17 | 昆明理工大学 | Method for recovering graphite and copper foil in anode of waste lithium ion battery through microwave radiation |
| CN114361639A (en) * | 2022-01-21 | 2022-04-15 | 中国科学院青海盐湖研究所 | Method for efficiently separating and recovering graphite and copper foil in negative electrode of waste lithium ion battery |
| CN114709506A (en) * | 2022-05-20 | 2022-07-05 | 中南大学 | Modification method of retired lithium ion battery negative electrode material |
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| CN103346365B (en) * | 2013-07-22 | 2015-06-24 | 田东 | Method for recycling negative material from waste lithium ion battery |
| CN103825064B (en) * | 2014-02-27 | 2016-05-25 | 北京工业大学 | Exemplary process method is reclaimed in a kind of waste and old power lithium iron phosphate battery environmental protection |
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