CN113644332A - Method for repairing and regenerating anode material of waste lithium manganate battery, anode material and lithium ion battery - Google Patents
Method for repairing and regenerating anode material of waste lithium manganate battery, anode material and lithium ion battery Download PDFInfo
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 54
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000010405 anode material Substances 0.000 title claims abstract description 40
- 239000002699 waste material Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 41
- 230000008439 repair process Effects 0.000 claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 21
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011572 manganese Substances 0.000 claims abstract description 18
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 238000010532 solid phase synthesis reaction Methods 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 230000008929 regeneration Effects 0.000 claims abstract description 5
- 238000011069 regeneration method Methods 0.000 claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims description 20
- 239000006258 conductive agent Substances 0.000 claims description 20
- 239000003960 organic solvent Substances 0.000 claims description 20
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 14
- 239000007774 positive electrode material Substances 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000003570 air Substances 0.000 claims description 11
- 229910001290 LiPF6 Inorganic materials 0.000 claims description 10
- 239000012298 atmosphere Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 8
- 239000006230 acetylene black Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 5
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 5
- RGVLTEMOWXGQOS-UHFFFAOYSA-L manganese(2+);oxalate Chemical compound [Mn+2].[O-]C(=O)C([O-])=O RGVLTEMOWXGQOS-UHFFFAOYSA-L 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- YNQRWVCLAIUHHI-UHFFFAOYSA-L dilithium;oxalate Chemical compound [Li+].[Li+].[O-]C(=O)C([O-])=O YNQRWVCLAIUHHI-UHFFFAOYSA-L 0.000 claims description 2
- 229910001386 lithium phosphate Inorganic materials 0.000 claims description 2
- 235000006748 manganese carbonate Nutrition 0.000 claims description 2
- 239000011656 manganese carbonate Substances 0.000 claims description 2
- 229940093474 manganese carbonate Drugs 0.000 claims description 2
- IPJKJLXEVHOKSE-UHFFFAOYSA-L manganese dihydroxide Chemical compound [OH-].[OH-].[Mn+2] IPJKJLXEVHOKSE-UHFFFAOYSA-L 0.000 claims description 2
- 229940099596 manganese sulfate Drugs 0.000 claims description 2
- 235000007079 manganese sulphate Nutrition 0.000 claims description 2
- 239000011702 manganese sulphate Substances 0.000 claims description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 2
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical compound [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 claims description 2
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 claims description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 claims description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 11
- 238000002441 X-ray diffraction Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000011888 foil Substances 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000004993 emission spectroscopy Methods 0.000 description 6
- 238000009616 inductively coupled plasma Methods 0.000 description 6
- 229910052596 spinel Inorganic materials 0.000 description 6
- 239000011029 spinel Substances 0.000 description 6
- 238000001291 vacuum drying Methods 0.000 description 6
- 239000010406 cathode material Substances 0.000 description 5
- LBSANEJBGMCTBH-UHFFFAOYSA-N manganate Chemical compound [O-][Mn]([O-])(=O)=O LBSANEJBGMCTBH-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000000840 electrochemical analysis Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4242—Regeneration of electrolyte or reactants
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- 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
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- 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
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- 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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Abstract
The invention discloses a method for repairing and regenerating a waste lithium manganate battery anode material, an anode material and a lithium ion battery. The invention discloses a method for repairing and regenerating a waste lithium manganate battery anode material, which comprises the following steps: mixing the anode material of the waste lithium manganate battery, a lithium additive and a manganese additive, and then carrying out high-temperature solid-phase synthesis treatment, thereby realizing restoration and regeneration after the treatment. The material after repair and regeneration has good structural stability, and the repair method is simple and environment-friendly; the repaired and regenerated material is used as the anode material of the lithium ion battery, and the lithium ion battery is assembled, so that the good cycle stability is shown, and the capacity retention rate of the battery is high; the method has short flow, saves the recovery cost and is easy to realize industrial application.
Description
Technical Field
The invention relates to the field of resource recycling technology and electrochemical battery electrode repairing and regenerating, in particular to a method for repairing and regenerating a waste lithium manganate battery anode material, an anode material and a lithium ion battery.
Background
The lithium ion battery has the characteristics of high energy and power density, long cycle life, simple operation, environmental friendliness and the like, and becomes an energy storage device for electric transportation and large-scale energy storage. With the continuous rising of the demand and the output of new energy automobiles, the demand and the output of lithium ion batteries in pure electric vehicles, hybrid electric vehicles and plug-in hybrid electric vehicles are increasing day by day. After the power automobile is retired, a large amount of waste lithium ion batteries are generated. The method has the advantages that the wastes are recycled in an environment-friendly, efficient and low-cost manner, potential threats to the environment and human health can be avoided, raw materials can be provided for the production of the lithium ion battery, the dependence on primary ore resources is reduced, and the sustainable development of the battery industry is promoted.
At present, the method for repairing the anode material of the waste layered lithium ion battery generally comprises the steps of firstly carrying out pretreatment such as disassembly on the waste lithium ion battery to obtain an anode plate containing active substances, separating an aluminum foil to obtain the anode material, adding lithium salt, and then repairing the electrochemical performance of the anode material by a high-temperature solid-phase synthesis technology or a hydrothermal synthesis method. However, for lithium manganate batteries, at high electrode potentials, disproportionation reactions will dissolve manganese from the spinel electrode in the presence of acid impurities; therefore, the components of the anode of the lithium manganate system after retirement are complex, and the capacity of the waste lithium manganate battery is difficult to repair through a lithium supplement treatment mode. Further, LiMn2O4LiCoO is considered promising because of its low cost, environmental friendliness, high theoretical capacity2Instead of the positive electrode material. However, the structural stability is poor, resulting in irreversible phase transition during charge and discharge. Therefore, a new recovery strategy is urgently needed to be developed, and a repairing and regenerating method for improving the structural stability of the waste lithium manganate is researched and developed.
Disclosure of Invention
In view of the above, the invention aims to provide a method for repairing and regenerating a waste lithium manganate battery anode material, an anode material and a lithium ion battery, wherein the lithium manganate material obtained by utilizing the method has good structural stability, is simple in repairing method and is environment-friendly; the prepared material is used as a positive electrode material of the lithium ion battery, and the lithium ion battery shows better cycle stability after being assembled, and the capacity retention rate of the battery is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for repairing and regenerating a waste lithium manganate battery anode material, which comprises the following steps:
mixing the anode material of the waste lithium manganate battery, a lithium additive and a manganese additive, and then carrying out high-temperature solid-phase synthesis treatment, thereby realizing restoration and regeneration after the treatment. The lithium manganate material obtained by the repairing and regenerating method has good structural stability, and the repairing method is simple and environment-friendly.
The following technical solutions are preferred but not limited to the technical solutions provided by the present invention, and the technical objects and advantages of the present invention can be better achieved and realized by the following technical solutions.
Preferably, the lithium additive is any one or a combination of at least two of lithium carbonate, lithium oxalate, lithium hydroxide, lithium phosphate and lithium fluoride;
preferably, the manganese additive is any one of manganese dioxide, manganous oxide, manganese sulfate, manganese carbonate, manganese hydroxide, manganese oxalate and manganese nitrate or a combination of at least two of the same.
The molar ratio of the lithium manganate battery positive electrode material to the lithium additive is preferably 1 (0.01 to 1), for example, 1:0.01, 1:0.05, 1:0.09, 1:0.1, 1:0.2, 1:0.3, 1:0.5, 1:0.7, or 1:0.8, but not limited to the recited values, and other values not recited in the numerical range are also applicable, and preferably 1 (0.1 to 0.5), for example, 1 (0.1 to 0.4), 1 (0.1 to 0.2), 1 (0.2 to 0.4), 1:0.1, 1:0.2, or 1: 0.4.
The molar ratio of the lithium manganate battery positive electrode material to the manganese additive is preferably 1 (0.01 to 1), for example, 1:0.01, 1:0.05, 1:0.09, 1:0.1, 1:0.2, 1:0.3, 1:0.5, 1:0.7, or 1:0.8, but not limited to the recited values, and other values not recited in the numerical range are also applicable, and preferably 1 (0.1 to 0.5), for example, 1 (0.1 to 0.3), 1 (0.1 to 0.2), 1 (0.2 to 0.3), 1:0.1, 1:0.2, or 1: 0.3.
Preferably, the high temperature solid phase synthesis is performed under vacuum or atmospheric conditions; typical but non-limiting examples of such combinations are: a combination of air and oxygen, a combination of oxygen and nitrogen, a combination of neon, argon and argon, a combination of air, nitrogen and argon, and the like. Preferably, the atmosphere is any one of air, oxygen, nitrogen, neon, argon or a combination of at least two of them.
Preferably, the temperature of the high temperature solid phase synthesis is 100 to 1000 ℃, such as 100 ℃, 200 ℃, 300 ℃, 400 ℃, 500 ℃, 600 ℃, 700 ℃ or 1000 ℃, but is not limited to the recited values, and other values not recited within the range of values are equally applicable, preferably 300 to 800 ℃, such as 500 to 700 ℃, 500 ℃ or 700 ℃.
Preferably, the high temperature solid phase treatment time is 0.1 to 24 hours, such as 0.1 hour, 4 hours, 7 hours, 12 hours, 15 hours, 18 hours, 21 hours or 24 hours, but not limited to the recited values, and other values within the range are also applicable, preferably 5 to 12 hours, such as 8 to 12 hours, 8 to 10 hours, 10 to 12 hours, 8 hours, 10 hours or 12 hours.
The invention further provides a positive electrode material which is prepared by the method for repairing and regenerating the positive electrode material of the waste lithium manganate battery.
The invention also provides a manufacturing method of the lithium ion battery, which comprises the following steps: the anode material is prepared by utilizing any one of the repairing and regenerating methods, and the lithium ion battery is assembled.
Preferably, the step of assembling the lithium ion battery is as follows:
mixing the positive electrode material, the conductive agent, the binder and the organic solvent, and uniformly stirring to obtain viscous paste; coating the obtained adhesive slurry on a current collector, and drying to obtain an electrode plate;
the electrode plate is used as a positive electrode, the metal lithium is used as a negative electrode, and LiPF6And assembling the solution as an electrolyte and the polypropylene as a diaphragm to obtain the lithium ion battery.
Preferably, the conductive agent is acetylene black; the binder is polyvinylidene fluoride; the mass ratio of the repair material to the conductive agent to the binder is 8:1: 1;
preferably, the organic solvent is 1-methyl-2-pyrrolidone; the addition amount of the organic solvent is controlled to be 5-20% of the solid content of the mixed solution of the repairing material, the conductive agent, the binder and the organic solvent, such as 10-15%, 10% or 15%, but not limited to the recited values, and other values not recited in the range of the values are also applicable;
preferably, the LiPF6The concentration of the solution is 1.0mol/L, and the solvent consists of ethylene carbonate and dimethyl carbonate in a volume ratio of 1: 1.
The lithium ion battery manufactured by the manufacturing method of the lithium ion battery is also within the protection scope of the invention.
Compared with the prior art, the invention has the following beneficial effects:
(1) the material after repair and regeneration has good structural stability, and the repair method is simple and environment-friendly; the repaired and regenerated material is used as the anode material of the lithium ion battery, and the lithium ion battery is assembled, so that the good cycle stability is shown, and the capacity retention rate of the battery is high;
(2) the method has short flow, saves the recovery cost and is easy to realize industrial application.
Drawings
FIG. 1 is an X-ray diffraction pattern of a positive electrode material before repair in example 1 of the present invention.
Fig. 2 is an X-ray diffraction pattern of the anode material after repair in example 1 of the present invention.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The method comprises the following steps of separating the anode material of the waste lithium manganate battery from the waste lithium manganate battery: the waste lithium manganate battery is discharged and disassembled, and the waste positive plate is dissolved and filtered by water after being roasted to obtain waste lithium manganate powder.
Example 1 repair of cathode Material of spent lithium manganate batteries and Assembly of lithium ion batteries
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing the anode material of the waste lithium manganate battery, lithium hydroxide and manganese oxalate in a molar ratio of 1:0.2:0.2, and performing high-temperature solid-phase synthesis treatment under an air atmosphere, wherein the roasting treatment temperature is 700 ℃, the roasting treatment time is 10 hours, and after the treatment, obtaining a repair material;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, and the adding amount of the organic solvent is controlled to be 10% of the solid content in the mixed solution, so as to obtain viscous paste; coating the obtained adhesive paste on a current collector (aluminum foil) to perform vacuum drying at the drying temperature of 80 ℃ for 12h, and drying to obtain an electrode plate; the obtained electrode sheet was used as a positive electrode, and metal lithium was used as a negative electrode (diameter: 15.8mm, thickness: 1mm) of 1.0mol/L LiPF6The lithium ion battery is assembled by using a solution (dissolved with ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v)) as an electrolyte and polypropylene as a diaphragm.
In the embodiment, the loss rate of manganese in the step (1) is calculated to be 20% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; by the analysis of X-ray diffraction (XRD) (figures 1 and 2), the material repaired in the step (1) is spinel lithium manganate oxide with a perfect crystal structure, and the purity of the spinel lithium manganate oxide is 99.9%. Electrochemical tests show that the first-cycle discharge capacity of the assembled lithium ion battery can reach 190mAh/g, and the cycle stability of the assembled lithium ion battery can reach 80% after the lithium ion battery is cycled for 100 weeks under 1C (1C-148 mAh/g).
Example 2 repair of Positive electrode Material of waste lithium manganate Battery and Assembly of lithium ion Battery
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing the anode material of the waste lithium manganate battery, lithium hydroxide and manganese dioxide in a molar ratio of 1:0.2:0.1, and performing high-temperature solid-phase synthesis treatment under an air atmosphere, wherein the roasting treatment temperature is 500 ℃, the roasting treatment time is 10 hours, and after the treatment, obtaining a repair material;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, and the adding amount of the organic solvent is controlled to be 10% of the solid content in the mixed solution, so as to obtain viscous paste; coating the obtained slurry on a current collector (aluminum foil) for vacuum drying at the drying temperature of 80 ℃ for 12h to obtain an electrode plate after drying, taking the obtained electrode plate as a positive electrode, taking metal lithium as a negative electrode (the diameter is 15.8mm, the thickness is 1mm) and 1.0mol/L of LiPF6The lithium ion battery is assembled by using a solution (dissolved with ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v)) as an electrolyte and polypropylene as a diaphragm.
In the embodiment, the loss rate of manganese in the step (1) is calculated to be 20% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; and (3) analyzing by X-ray diffraction (XRD), detecting the manganese-deficient anode material of the material repaired in the step (1), wherein the manganese deficiency rate is 8%.
Example 3 repair of cathode Material of spent lithium manganate batteries and Assembly of lithium ion batteries
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing a waste lithium manganate battery anode material, lithium hydroxide and manganese oxalate with a molar ratio of 1:0.1:0.1, carrying out high-temperature solid-phase synthesis treatment in an air atmosphere, carrying out high-temperature solid-phase synthesis treatment in the air atmosphere, wherein the roasting treatment temperature is 700 ℃, the roasting treatment time is 12 hours, and obtaining a repair material after the treatment is finished;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, and the adding amount of the organic solvent is controlled to be 10% of the solid content in the mixed solution, so as to obtain viscous paste; coating the obtained slurry on a current collector (aluminum foil) for vacuum drying at the drying temperature of 80 ℃ for 10h to obtain an electrode plate after drying, taking the obtained electrode plate as a positive electrode, taking metal lithium as a negative electrode (the diameter is 15.8mm, the thickness is 1mm) and 1.0mol/L of LiPF6The lithium ion battery was assembled with a solution in which ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v) was dissolved as an electrolyte and polypropylene as a separator.
In the embodiment, the loss rate of manganese in the step (1) is calculated to be 30% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; and (3) analyzing by X-ray diffraction (XRD), wherein the repaired material in the step (1) is spinel lithium manganate oxide with a complete crystal structure, and the purity of the repaired material is 99.8%. Electrochemical tests show that the first-week discharge capacity of the assembled lithium ion battery can reach 189mAh/g, and the cycle stability can reach 82% after 100-week cycle.
Example 4 repair of cathode Material of spent lithium manganate batteries and Assembly of lithium ion batteries
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing the anode material of the waste lithium manganate battery, lithium carbonate and manganese oxalate in a molar ratio of 1:0.2:0.2, and performing high-temperature solid-phase synthesis treatment under an air atmosphere, wherein the roasting treatment temperature is 500 ℃, the roasting treatment time is 8 hours, and after the treatment is finished, obtaining a repair material;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, and the adding amount of the organic solvent is controlled so that the solid content in the mixed solution is controlled10 percent to obtain viscous paste; coating the obtained slurry on a current collector (aluminum foil) for vacuum drying at 60 ℃ for 10h to obtain an electrode plate, taking the obtained electrode plate as a positive electrode, taking metal lithium as a negative electrode (the diameter is 15.8mm, the thickness is 1mm) and 1.0mol/L of LiPF6The lithium ion battery was assembled using a solution in which ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v) was dissolved as an electrolyte.
In the embodiment, the loss rate of manganese in the step (1) is calculated to be 40% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; and (3) analyzing by X-ray diffraction (XRD), detecting the manganese-deficient anode material of the repaired material in the step (1), wherein the manganese deficiency rate is 11%.
Example 5 repair of cathode Material of spent lithium manganate batteries and Assembly of lithium ion batteries
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing a waste lithium manganate battery positive electrode material, lithium carbonate and manganese dioxide in a molar ratio of 1:0.2:0.2, and performing high-temperature solid-phase synthesis treatment under an air atmosphere, wherein the roasting treatment temperature is 700 ℃, the roasting treatment time is 8 hours, and obtaining a repair material after the treatment is finished;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, the adding amount of the organic solvent is controlled to be 10% of the solid content in the mixed solution, obtaining a viscous paste, coating the viscous paste on a current collector (aluminum foil) for vacuum drying at the drying temperature of 90 ℃ for 12 hours, obtaining an electrode plate after drying, taking the obtained electrode plate as an anode, taking metal lithium as a cathode (the diameter of 15.8mm and the thickness of 1mm), and taking 1.0mol/L LiPF6The lithium ion battery was assembled with a solution in which ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v) was dissolved as an electrolyte and polypropylene as a separator.
In the embodiment, the loss rate of manganese in the step (1) is calculated to be 25% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; and (3) analyzing by X-ray diffraction (XRD), wherein the repaired material in the step (1) is spinel lithium manganate oxide with a complete crystal structure, and the purity of the repaired material is 99.9%. Electrochemical tests show that the first-week discharge capacity of the assembled lithium ion battery can reach 187mAh/g, and the cycle stability can reach 83% after 100-week circulation.
Example 6 repair of cathode Material of spent lithium manganate batteries and Assembly of lithium ion batteries
Repairing and recycling the anode material of the waste lithium manganate battery and assembling the lithium ion battery according to the following steps:
(1) mixing a waste lithium manganate battery positive electrode material, lithium carbonate and manganese dioxide in a molar ratio of 1:0.4:0.3, and performing high-temperature solid-phase synthesis treatment under an air atmosphere, wherein the roasting treatment temperature is 700 ℃, the roasting treatment time is 12 hours, and obtaining a repair material after the treatment is finished;
(2) mixing and uniformly stirring a repair material, a conductive agent (acetylene black), a binder (polyvinylidene fluoride) and an organic solvent (1-methyl-2-pyrrolidone), wherein the mass ratio of the repair material to the conductive agent to the binder is 8:1:1, and the adding amount of the organic solvent is controlled to be 15% of the solid content in the mixed solution, so as to obtain viscous paste; coating the obtained slurry on a current collector (aluminum foil) for vacuum drying at 70 ℃ for 12h to obtain an electrode plate, taking the obtained electrode plate as a positive electrode, taking metal lithium as a negative electrode (the diameter is 15.8mm, the thickness is 1mm) and 1.0mol/L of LiPF6The lithium ion battery was assembled with a solution in which ethylene carbonate/dimethyl carbonate (EC/DMC, 1:1, v/v) was dissolved as an electrolyte and polypropylene as a separator.
In the embodiment, the manganese deficiency rate in the step (1) is calculated to be 70% (before repair) through inductively coupled plasma emission spectroscopy (ICP-OES) detection; and (3) analyzing by X-ray diffraction (XRD), wherein the repaired material in the step (1) is spinel lithium manganate oxide with a complete crystal structure, and the purity of the repaired material is 99.9%. Electrochemical tests show that the first-week discharge capacity of the assembled lithium ion battery can reach 178mAh/g, and the cycle stability can reach 82% after 100-week cycle.
The applicant states that the present invention is illustrated in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e. it is not meant that the present invention must rely on the above detailed methods for its implementation. It will be apparent to those skilled in the art that any modification, equivalent substitution of materials for the invention, addition of additional materials, selection of specific means, etc., which are apparent to those skilled in the art are intended to be within the scope and disclosure of the invention.
Claims (10)
1. A method for repairing and regenerating a waste lithium manganate battery anode material comprises the following steps:
mixing the anode material of the waste lithium manganate battery, a lithium additive and a manganese additive, and then carrying out high-temperature solid-phase synthesis treatment, thereby realizing restoration and regeneration after the treatment.
2. The method of claim 1, wherein: the lithium additive is any one or the combination of at least two of lithium carbonate, lithium oxalate, lithium hydroxide, lithium phosphate and lithium fluoride;
the manganese additive is any one or the combination of at least two of manganese dioxide, manganous oxide, manganic oxide, manganese sulfate, manganese carbonate, manganese hydroxide, manganese oxalate and manganese nitrate.
3. The method according to claim 1 or 2, characterized in that: the molar ratio of the lithium manganate battery anode material to the lithium additive is 1 (0.01-1);
the molar ratio of the lithium manganate battery anode material to the manganese additive is 1 (0.01-1).
4. The method according to any one of claims 1-3, wherein: the high-temperature solid phase synthesis is carried out under vacuum or atmosphere conditions;
the atmosphere is any one or the combination of at least two of air, oxygen, nitrogen, neon, argon or argon.
5. The method according to any one of claims 1-4, wherein: the temperature of the high-temperature solid phase synthesis is 100-1000 ℃, and the time is 0.1-24 h.
6. The anode material is prepared by the method for repairing and regenerating the anode material of the waste lithium manganate battery as defined in any one of claims 1 to 5.
7. A manufacturing method of a lithium ion battery comprises the following steps: preparing a positive electrode material by using the repairing and regenerating method of any one of claims 1 to 5, and assembling the lithium ion battery.
8. The method for manufacturing a lithium ion battery according to claim 7, wherein: the steps of assembling the lithium ion battery are as follows:
mixing the positive electrode material, the conductive agent, the binder and the organic solvent, and uniformly stirring to obtain viscous paste; coating the obtained adhesive slurry on a current collector, and drying to obtain an electrode plate;
the electrode plate is used as a positive electrode, the metal lithium is used as a negative electrode, and LiPF6And assembling the solution as an electrolyte and the polypropylene as a diaphragm to obtain the lithium ion battery.
9. The method of manufacture of claim 8, wherein: the conductive agent is acetylene black; the binder is polyvinylidene fluoride; the mass ratio of the repair material to the conductive agent to the binder is 8:1: 1;
the organic solvent is 1-methyl-2-pyrrolidone; the adding amount of the organic solvent is controlled to be 5-20% of the solid content of the mixed liquid of the repairing material, the conductive agent, the binder and the organic solvent;
the LiPF6The concentration of the solution is 1.0mol/L, and the solvent consists of ethylene carbonate and dimethyl carbonate in a volume ratio of 1: 1.
10. The lithium ion battery manufactured by the method for manufacturing a lithium ion battery according to any one of claims 7 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114566730A (en) * | 2022-03-05 | 2022-05-31 | 贺州学院 | Method for preparing positive electrode composite material by using waste lithium manganate battery |
| CN116093476A (en) * | 2022-11-30 | 2023-05-09 | 山东华劲电池材料科技有限公司 | Method for repairing lithium manganate positive electrode material with stable performance and application thereof |
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| CN114566730B (en) * | 2022-03-05 | 2024-02-06 | 贺州学院 | Method for preparing positive electrode composite material by using waste lithium manganate battery |
| CN116093476A (en) * | 2022-11-30 | 2023-05-09 | 山东华劲电池材料科技有限公司 | Method for repairing lithium manganate positive electrode material with stable performance and application thereof |
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