CN113444253A - Metal organic framework material and preparation method and application thereof - Google Patents
Metal organic framework material and preparation method and application thereof Download PDFInfo
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- CN113444253A CN113444253A CN202010213230.1A CN202010213230A CN113444253A CN 113444253 A CN113444253 A CN 113444253A CN 202010213230 A CN202010213230 A CN 202010213230A CN 113444253 A CN113444253 A CN 113444253A
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Abstract
The application discloses a metal organic framework material and a preparation method and application thereof, wherein the preparation method comprises the following steps: reacting a mixed solution containing a waste lithium ion battery anode material and an organic ligand to obtain a metal organic framework material; the anode material of the waste lithium ion battery comprises an active material left after a current collector of the anode of the waste lithium ion battery is removed. The method utilizes the waste lithium ion battery anode material to obtain the MOFs material, is beneficial to the recovery and utilization of the lithium ion battery anode material, and has shorter process flow and simpler operation compared with the traditional lithium ion battery anode material recovery method.
Description
Technical Field
The application relates to a metal organic framework material and a preparation method and application thereof, belonging to the technical field of MOFs material preparation and the field of lithium ion battery anode material recovery.
Background
Due to the increase of the demand of electronic products and the explosive increase of the number of waste lithium batteries, serious problems of resources, environment and the like are brought, so that the development of the technology for recovering the waste lithium batteries becomes necessary and urgent. Particularly, the lithium ion battery anode material contains more metal elements such as Ni, Co and the like, so that the recovery value is higher.
The existing commercial method for recovering the lithium ion battery anode material mainly comprises hydrometallurgy, pyrometallurgy or a method combining the hydrometallurgy and the pyrometallurgy. But it has some disadvantages, such as long process flow, complex process, etc. And the pickling process in the method causes high requirements on production equipment. Therefore, it is necessary to develop a novel method for recovering the lithium ion battery cathode material with short flow and simple process.
Metal Organic-Frameworks (MOFs for short), also called porous coordination polymers, are three-dimensional network-structured materials with periodic structures formed by connecting Metal nodes and Organic ligand networks in the form of coordination bonds or intermolecular forces. The catalyst has the advantages of high surface area, strong material design, high porosity and the like, has wide development prospects in the fields of gas adsorption, storage, catalysis and the like, and the preparation and performance research of the catalyst become one of the hot researches at present.
Disclosure of Invention
According to the first aspect of the application, the MOFs material is obtained by utilizing the waste lithium ion battery anode material, the recovery and utilization of the lithium ion battery anode material are facilitated, and compared with the traditional lithium ion battery anode material recovery method, the method is shorter in process and simpler in operation.
The preparation method of the metal organic framework material comprises the following steps:
reacting a mixed solution containing a waste lithium ion battery anode material and an organic ligand to obtain a metal organic framework material;
the anode material of the waste lithium ion battery comprises an active material left after a current collector of the anode of the waste lithium ion battery is removed.
The active material of the waste lithium ion battery is selected from lithium cobaltate (LiCoO)2) Lithium nickelate (LiNiO)2) Nickel cobalt manganese ternary positive electrode material (LiNi)xCoyMn1-x-yO2Abbreviated NMC).
Optionally, the organic ligand is a carboxyl-containing compound;
the compound containing carboxyl is at least one of terephthalic acid, trimesic acid, 2-hydroxy terephthalic acid and 2-amino terephthalic acid.
Optionally, the mixed solution further contains a solvent, and the solvent is a mixture of an aprotic polar solvent and water;
the aprotic polar solvent is selected from at least one of N, N-dimethylformamide, acetonitrile and tetrahydrofuran;
preferably, the mass ratio of the aprotic polar solvent to water is 1: 3-3: 1.
optionally, the dosage ratio of the organic ligand to the aprotic polar solvent is 1-30 mg/mL.
Optionally, the mass ratio of the waste lithium ion battery cathode material to the organic ligand is 1: 0.6 to 5.
Alternatively, the specific conditions of the reaction include:
the reaction temperature is 80-220 ℃;
the reaction time is 12-120 h.
Optionally, the waste lithium ion battery positive electrode material further comprises a conductive agent and a binder;
the conductive agent is selected from at least one of conductive carbon black (super-P, Ketjen black, acetylene black), conductive graphite (Ks-6, Ks-15, S-O), carbon nano tube (CNT conductive agent) and Vapor Grown Carbon Fiber (VGCF);
the positive electrode binder is at least one selected from polyvinylidene fluoride and polyacrylate;
preferably, the mass percentage of the conductive agent is 5-20%;
preferably, the mass percentage of the adhesive is 5-20%.
In a specific embodiment, referring to fig. 5, a method for recycling a lithium ion battery anode material based on preparation of MOFs materials is provided, and the method comprises the steps of mixing a waste lithium ion anode material obtained through pretreatment with a ligand and a solvent, placing the mixture in a sealed reaction kettle, reacting at 80-220 ℃ for 12-120 hours to obtain a reaction product, and separating, washing and drying the reaction product to obtain the MOFs materials.
In a second aspect of the present application, there is provided a metal-organic framework material prepared by the method for preparing a metal-organic framework material described in any one of the above.
In a third aspect of the present application, there is provided an application of the metal organic framework material prepared by the preparation method of any one of the above metal organic framework materials in the fields of gas adsorption, storage and catalysis.
The beneficial effects that this application can produce include:
1) according to the preparation method of the metal organic framework material, provided by the invention, the waste lithium ion battery material is prepared into the MOFs material, the method is a novel method for recovering the lithium ion battery, compared with the traditional hydrometallurgy method, the waste lithium ion battery is shorter in flow, simpler to operate and beneficial to recovery and utilization of the lithium ion battery anode material.
2) The invention provides a lower-cost raw material source for the preparation of MOFs materials, and is beneficial to the industrial production of the MOFs materials.
Drawings
FIG. 1 is a picture of the shape of MOFs material prepared in example 1 of the present invention under a scanning electron microscope;
FIG. 2 is a shape picture of the MOFs material prepared in example 2 of the present invention under a scanning electron microscope;
FIG. 3 is an XRD image of the MOFs material prepared in example 1 of the present invention, and standard spectral lines, wherein PDF # 00-034-;
FIG. 4 is an XRD image of the MOFs material prepared in example 2 of the present invention, and standard spectral lines, wherein PDF # 00-034-;
FIG. 5 is a flow chart of the preparation of the present invention;
fig. 6 is a scanning electron microscope photograph of the positive electrode material of the waste NMC811 lithium ion battery used in example 1 after the current collector is removed from the positive electrode;
fig. 7 is a scanning electron microscope photograph of the cathode material after the current collector of the cathode of the waste NMC111 lithium ion battery used in example 2 is removed.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
NMC811 lithium ion battery, NMC111 lithium ion battery, LiCoO2Lithium ion battery and LiNiO2The lithium ion batteries are all provided by advanced energy storage technology research institute of Tianmu lake, Inc.;
in each embodiment of the application, the battery is regarded as waste after being discharged to 80% of the initial capacity at the 2C multiplying power on the battery test system.
Example 1
(1) Separating the anode of the waste NMC811 lithium ion battery, and removing the current collector from the anode by a mechanical method to obtain the waste lithium ion battery anode material (the micro morphology is shown in figure 6).
(2) Weighing the waste lithium ion battery positive electrode material (LiNi is used as an active material) obtained in the step (1)0.8Co0.1Mn0.1O2Conductive carbon black super-P is used as a conductive agent, PVDF is used as a binder), 500mg of organic ligand terephthalic acid, 75mL of N, N-dimethylformamide and 25mL of water are mixed to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 48 hours at the temperature of 120 ℃ to obtain a reaction product, the reaction product is cooled to room temperature and then taken out of the reaction kettle, the supernatant is poured off, and the lower-layer product is poured into a centrifuge tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 100 ℃ for 3.5 hours to obtain the Ni/Co-MOFs material. The surface topography of the scanning electron microscope is shown in figure 1.
Example 2
(1) Separating the anode of the waste NMC111 lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the waste lithium ion battery anode material (the micro morphology is shown in figure 7).
(2) Weighing the waste lithium ion battery positive electrode material (LiNi is used as an active material) obtained in the step (1)1/3Co1/3Mn1/ 3O2Conductive carbon black super-P is used as a conductive agent, PVDF is used as a binder) 500mg, terephthalic acid 1200mg as an organic ligand is mixed with 75mL of N, N-dimethylformamide and 25mL of waterObtaining a mixed solution, placing the mixed solution in a sealed reaction kettle, reacting for 48 hours at the temperature of 120 ℃ to obtain a reaction product, cooling to room temperature, taking the product out of the reaction kettle, pouring supernatant liquid, and pouring a lower-layer product into a centrifugal tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 110 ℃ for 3 hours to obtain the Ni/Co-MOFs material. The surface topography of the scanning electron microscope is shown in FIG. 2.
Example 3
(1) Waste LiCoO2Separating the anode of the lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the anode material of the waste lithium ion battery.
(2) Weighing the waste lithium ion battery positive electrode material (active material is LiCoO) obtained in the step (1)2The conductive agent is CNT, the binder is PVDF), 500mg of organic ligand trimesic acid and 1200mg of organic ligand are mixed with 75mL of acetonitrile and 25mL of water to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 48 hours at the temperature of 120 ℃ to obtain a reaction product, the reaction product is taken out of the reaction kettle after being cooled to room temperature, the supernatant is poured off, and the lower-layer product is poured into a centrifugal tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 80 ℃ for 8 hours to obtain the Co-MOFs material.
Example 4
(1) Waste LiNiO is used2Separating the anode of the lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the anode material of the waste lithium ion battery.
(2) Weighing the waste lithium ion battery positive electrode material (LiNiO is used as an active material) obtained in the step (1)2The conductive agent is VGCF, the binder is polyacrylate) 500mg, the organic ligand is 2-hydroxy terephthalic acid 1200mg, the mixture is mixed with acetonitrile 100mL and water 25mL to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts at the temperature of 160 ℃ for 24 hours to obtain a reaction product, the reaction product is taken out from the reaction kettle after being cooled to the room temperature, the supernatant is poured off, and the lower product is poured into a centrifuge tube for centrifugation; washed with absolute ethanol, centrifuged (washed,and centrifuging twice), pouring out supernatant after centrifuging, and finally drying for 4 hours at 100 ℃ to obtain the Ni-MOFs material.
Example 5
(1) Separating the anode of the waste NMC811 lithium ion battery, and removing the current collector from the anode by a mechanical method to obtain the waste lithium ion battery anode material.
(2) Weighing the waste lithium ion battery positive electrode material (LiNi is used as an active material) obtained in the step (1)0.8Co0.1Mn0.1O2The conductive agent is Ks-6, the binder is PVDF), 500mg of organic ligand 2-amino terephthalic acid, 50mL of tetrahydrofuran and 50mL of water are mixed to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 24 hours at the temperature of 160 ℃ to obtain a reaction product, the reaction product is taken out of the reaction kettle after being cooled to room temperature, the supernatant is poured off, and the lower-layer product is poured into a centrifuge tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 50 ℃ for 12 hours to obtain the Ni/Co-MOFs material.
Example 6
(1) Separating the anode of the waste NMC111 lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the waste lithium ion battery anode material.
(2) Weighing the waste lithium ion battery positive electrode material (LiNi is used as an active material) obtained in the step (1)1/3Co1/3Mn1/ 3O2Conductive carbon black super-P is used as a conductive agent, PVDF is used as a binder), 500mg of organic ligand terephthalic acid is mixed with 80mL of tetrahydrofuran and 20mL of water to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 12 hours at the temperature of 220 ℃ to obtain a reaction product, the reaction product is taken out of the reaction kettle after being cooled to room temperature, the supernatant is poured off, and the lower product is poured into a centrifuge tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 150 ℃ for 1 hour to obtain the Ni/Co-MOFs material.
Example 7
(1) Waste LiCoO2Separating the anode of the lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the anode material of the waste lithium ion battery.
(2) Weighing the waste lithium ion battery positive electrode material (active material is LiCoO) obtained in the step (1)2Conductive carbon black super-P is used as a conductive agent, PVDF is used as a binder), 500mg of organic ligand terephthalic acid, 75mL of N, N-dimethylformamide and 25mL of water are mixed to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 20 hours at the temperature of 200 ℃ to obtain a reaction product, the reaction product is cooled to room temperature and then taken out of the reaction kettle, the supernatant is poured off, and the lower-layer product is poured into a centrifuge tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 100 ℃ for 3 hours to obtain the Co-MOFs material.
Example 8
(1) Waste LiNiO is used2Separating the anode of the lithium ion battery, and removing the current collector of the anode by a mechanical method to obtain the anode material of the waste lithium ion battery.
(2) Weighing the waste lithium ion battery positive electrode material (LiNiO is used as an active material) obtained in the step (1)2Conductive carbon black super-P is used as a conductive agent, polyacrylate is used as a binder), 500mg of organic ligand terephthalic acid and 1200mg of N, N-dimethylformamide are mixed with 75mL of water and 25mL of water to obtain a mixed solution, the mixed solution is placed in a sealed reaction kettle and reacts for 48 hours at the temperature of 140 ℃ to obtain a reaction product, the reaction product is cooled to room temperature and then taken out of the reaction kettle, the supernatant is poured off, and the lower-layer product is poured into a centrifuge tube for centrifugation; and washing with absolute ethyl alcohol, centrifuging (washing and centrifuging are repeated twice), pouring out supernatant after centrifuging, and finally drying at 100 ℃ for 3 hours to obtain the Ni-MOFs material.
The MOFs materials provided in examples 1-8 were characterized:
obtaining a scanning electron microscope picture of the material by adopting a field emission scanning electron microscope thermal field of Sirion200 model of FEI company, and the figure 1-2;
XRD images of the materials were obtained using an X-ray powder diffractometer model D8 ADVANCE DAVINC from BRUKER, Germany, FIGS. 3-4;
adopting a thermal field of a field emission scanning electron microscope of FEI Quanta FEG 250 type of FEI company to obtain a scanning electron microscope picture of the material, and obtaining a picture of the material by using the thermal field of the field emission scanning electron microscope, and obtaining a picture of the material by using the picture in FIGS. 6-7;
wherein typical representatives are the materials provided in examples 1 and 2, and fig. 1 and 2 are the scanning electron microscope pictures of the MOFs materials obtained in examples 1 and 2, respectively; as shown in fig. 3 and 4, in the figures, the upper X-ray diffraction spectrum is the X-ray diffraction spectrum of the MOFs material prepared in example 1 or 2, and the lower vertical line is the standard spectrum of the relevant PDF card, so that the X-ray spectrum of the prepared material has the position and intensity characteristics of the relevant standard spectrum, which indicates that the relevant MOFs material is obtained; fig. 6 and 7 are scanning electron microscope pictures of the lithium ion battery positive electrode material obtained in examples 1 and 2 after the current collector is removed;
other examples all have the same structural characteristics as examples 1 and 2, and are typical MOFs materials.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A preparation method of a metal organic framework material is characterized by comprising the following steps:
reacting a mixed solution containing a waste lithium ion battery anode material and an organic ligand to obtain a metal organic framework material;
the anode material of the waste lithium ion battery comprises an active material left after a current collector of the anode of the waste lithium ion battery is removed.
2. The method of claim 1, wherein the active material is at least one selected from the group consisting of lithium cobaltate, lithium nickelate, and nickel cobalt manganese ternary positive electrode materials.
3. The method for preparing a metal-organic framework material according to claim 1, wherein the organic ligand is a carboxyl group-containing compound;
the compound containing carboxyl is at least one of terephthalic acid, trimesic acid, 2-hydroxy terephthalic acid and 2-amino terephthalic acid.
4. The method according to claim 1, wherein the mixed solution further contains a solvent, and the solvent is a mixture of an aprotic polar solvent and water;
the aprotic polar solvent is selected from at least one of N, N-dimethylformamide, acetonitrile and tetrahydrofuran;
preferably, the mass ratio of the aprotic polar solvent to water is 1: 3-3: 1.
5. the method for preparing a metal-organic framework material according to claim 4, wherein the dosage ratio of the organic ligand to the aprotic polar solvent is 1-30 mg/mL.
6. The preparation method of the metal-organic framework material according to claim 1, wherein the mass ratio of the anode material of the waste lithium ion battery to the organic ligand is 1: 0.6 to 5.
7. The method for preparing a metal-organic framework material according to claim 1, wherein the specific conditions of the reaction comprise:
the reaction temperature is 80-220 ℃;
the reaction time is 12-120 h.
8. The method for preparing the metal-organic framework material according to claim 1, wherein the anode material of the waste lithium ion battery further comprises a conductive agent and a binder;
the conductive agent is selected from at least one of conductive carbon black, conductive graphite, carbon nanotubes and vapor grown carbon fibers;
the positive electrode binder is at least one selected from polyvinylidene fluoride and polyacrylate;
preferably, the mass percentage of the conductive agent is 5-20%;
preferably, the mass percentage of the adhesive is 5-20%.
9. The metal-organic framework material prepared by the method for preparing a metal-organic framework material according to any one of claims 1 to 8.
10. The application of the metal organic framework material prepared by the preparation method of the metal organic framework material as claimed in any one of claims 1 to 8 in the fields of gas adsorption, storage and catalysis.
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| CN114583306A (en) * | 2022-03-01 | 2022-06-03 | 西安交通大学 | Method for recycling all elements of waste lithium iron phosphate batteries and preparing iron-based MOFs (metal-organic frameworks) material by organic acid integrated two-in-one double-effect |
| CN114583120A (en) * | 2021-12-27 | 2022-06-03 | 武汉理工大学 | Method for designing and constructing gradient structure with metal ion component on surface of lithium-rich material |
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