LU503745B1 - Method for designing high-capacity electrode material by particle surface reconstruction - Google Patents
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- LU503745B1 LU503745B1 LU503745A LU503745A LU503745B1 LU 503745 B1 LU503745 B1 LU 503745B1 LU 503745 A LU503745 A LU 503745A LU 503745 A LU503745 A LU 503745A LU 503745 B1 LU503745 B1 LU 503745B1
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 title claims abstract description 12
- 239000007772 electrode material Substances 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000010405 anode material Substances 0.000 claims abstract description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 3
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 claims description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- -1 Pss Chemical compound 0.000 claims description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 claims description 2
- 239000007773 negative electrode material Substances 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract description 17
- 238000012986 modification Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000002086 nanomaterial Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 30
- 229910052742 iron Inorganic materials 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 125000005842 heteroatom Chemical group 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- 239000005750 Copper hydroxide Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 description 1
- MEYVLGVRTYSQHI-UHFFFAOYSA-L cobalt(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Co+2].[O-]S([O-])(=O)=O MEYVLGVRTYSQHI-UHFFFAOYSA-L 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 229910001956 copper hydroxide Inorganic materials 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 description 1
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
-
- 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
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a method for designing high-capacity electrode material by particle surface reconstruction. The invention provides a simple and accurate strategy for surface reconstruction and modification of high-capacity anode materials, which adopts easily-obtained metal soluble salts to accurately replace metal atoms on the surface of common metal oxyacid salts (oxalate, carbonate, hydroxide) lithium ion battery anode material particles at room temperature, so as to realize external reconstruction interface modification of single or multi-component crystal structures with inconsistent looseness. This method can effectively retain the original micro-nano structure of lithium-ion battery materials, and has strong adaptability to raw materials. It also makes use of the high catalytic activity of newly introduced metal atoms, material defects and the influence of atomic size on the looseness of crystal surface to realize interface reconstruction and modification of common high-capacity anode materials, which can effectively improve the electrochemical performance of materials.
Description
DESCRIPTION LU503745
METHOD FOR DESIGNING HIGH-CAPACITY ELECTRODE MATERIAL BY
PARTICLE SURFACE RECONSTRUCTION
The invention relates to a method for designing a high-capacity electrode material by particle surface reconstruction, and belongs to the technical field of anode materials of lithium-ion batteries.
Since Sony Corporation of Japan introduced the graphite anode for commercial lithium-ion batteries, lithium-ion batteries with graphite anode have been widely used in watches, mobile phones, notebooks and electric vehicles. However, with the upgrading of electronic equipment, the capacity of traditional lithium-ion battery is difficult to meet the increasingly high energy density requirements of electronic equipment. Therefore, developing lithium-ion batteries with high energy density will be an important direction for the development of lithium-ion batteries.
The design and manufacture of high-energy lithium-ion batteries are inseparable from the selection of electrode materials. At present, the anode materials of high energy density lithium-ion batteries mainly include ultra-high-capacity alloy anodes such as Li,
Sn, Ge, Si and P, and metal oxides, sulfides, fluorides and metal oxyacids. Among them, compared with other high-capacity negative electrodes, metal oxyacid salts show excellent energy storage potential because of their short preparation process and energy- saving advantages. Tirado's research group first reported and revealed the application prospect of oxalate metalates in lithium-ion batteries. Subsequently, the research groups at home and abroad studied the lithium storage properties of metal oxalate metalates respectively. They found that although the metal oxalate metalate showed high capacity and stable cycling performance during lithium storage, it faced low and poor lithium-idr/503745 electron conductivity in the first cycle of coulombic efficiency in the early stage of energy storage. In order to overcome these shortcomings, the researchers put forward some measures, such as morphology control, transition metal ion doping and carbon coating on the particle surface. The appearance of these measures greatly improved the electrochemical properties of metal oxyacid salts, but the materials still showed unsatisfactory electrochemical properties under these modification measures.
The purpose of the invention is to provide a high-capacity metal oxalate metalate anode material for particle surface reconstruction design. The invention is realized by the following technical scheme:
S1, dispersing a metal oxysalt high-capacity negative electrode material in a mixed solution of an organic solvent and deionized water to obtain a uniformly dispersed mixed solution, wherein the mass-volume ratio of the metal oxysalt to the mixed solution is 0.1- 1 9:50-200 ml;
S2, adding soluble metal salt into the mixed solution obtained in S1, reacting at 0- 200°C for 5-72 h, filtering, washing and drying to obtain the surface reconstructed material containing the crystal water;
S3, sintering the surface reconstructed material containing the crystal water obtained in S3 at 200-350°C for 4-10 h under vacuum or inert atmosphere to obtain the surface reconstructed high-capacity lithium-ion battery anode material.
The organic solvent in S1 comprises one or more of absolute ethanol, ethylene glycol,
CTAB, NMP, DMA, DMSO and DMF.
The mixed solution in S1 further comprises one or more of PDDA, Pss, sulfuric acid and hydrochloric acid.
The soluble metal salts in S2 include one or more of nitrates, sulfates and acetates of transition metal.
The molar ratio of soluble metal salt to metal oxyacid salt in S2 is 0.01-1:1-0.01.
Compared with the prior art, the invention has the beneficial effects that: LU503745
Precise surface reconstruction of high-capacity metal oxysalt anode material can be achieved through a simple technological process. This method not only highlights the advantages of existing modification methods, but also introduces metal heteroatoms with different degrees of looseness and high conductivity and catalytic activity to reconstruct the surface of metal oxysalt anode materials. The in-situ reconstructed interface contains different atomic components from the original body, which can give full play to the performance of the original high-capacity anode material and make full use of the reconstructed interface metal heteroatoms to further improve the electrochemical performance of the material.
Fig. 1 is a schematic diagram of material surface reconstruction related to the present invention;
Fig. 2 shows the scanning electron microscope pattern and the EDS pattern of Fe,
Cu and O elements in the same area of the reconstructed interface of iron (Il) oxalate prepared in Example 1 of the present invention;
Fig. 3 is a cyclic stability curve of iron (Il) oxalate reconstructed interface material prepared in Example 2 of the present invention.
DESCRIPTION OF THE INVENTION LU503745
The invention will be further explained with the attached drawings and specific embodiments.
Example 1
A copper atom surface reconstruction strategy for preparing high-capacity iron (Il) oxalate material comprises the following specific steps:
S1, dispersing iron (Il) oxalate high-capacity anode material in a mixed solution consisting of 80 ml absolute ethanol and 10 ml deionized water to obtain a uniformly dispersed mixed solution; among them, the ratio of metal oxysalt to mixed solution is 1 g: 90 ml;
S2, adding 0.14 g of copper sulfate pentahydrate into the mixed solution obtained in
S1, reacting at 50°C for 6 h, filtering, washing and drying to obtain the surface reconstructed material containing crystal water;
S3, sintering the surface reconstructed material containing crystal water obtained in
S3 at 270°C for 4 h in vacuum or inert atmosphere to obtain the high-capacity lithium-ion battery anode material with surface reconstructed copper atoms.
The scanning electron microscope pattern of the surface reconstruction interface of the copper atom prepared in this example is shown in Fig. 2.
Example 2
A copper atom surface reconstruction strategy for preparing a high-capacity iron (Il) oxalate lithium-ion battery anode material comprises the following specific steps:
S1, dispersing iron (Il) oxalate high-capacity material in a mixed solution consisting of 80 ml absolute ethanol and 10ml deionized water to obtain a uniformly dispersed mixed solution; among them, the ratio of metal oxyacid salt to mixed solution is 1 g: 90 ml;
S2, adding 0.14 g of copper sulfate pentahydrate into the mixed solution obtained in
S1, and reacting at 50°C for 6 h; filtering, washing and drying after the reaction is finished to obtain the surface reconstructed material containing crystal water;
and S3, sintering the surface reconstructed material containing crystal wat&t/503745 obtained in S3 at 270°C for 4 h in an inert atmosphere to obtain the anode material of the iron (Il) oxalate lithium-ion battery with surface reconstructed copper atoms.
Weigh 0.1 g of iron (ll) oxalate prepared in this example, 0.01 g of acetylene black, 0.02 g of carbon nanotubes and 0.01 g of polyvinylidene fluoride (PVDF), put them into a mortar, add 1.8 ml of N-methyl-2-pyrrolidone solution, grind and stir for 40 min, evenly spread the slurry on copper foil, dry it in hot air at 60°C for 30min, then transfer it to a vacuum oven at 60°C for continuous drying for 12 h, and then cut the pole pieces with a diameter of 13.5 mm.
In a glove box filled with argon gas, the electrode plate can be assembled into a battery with the existing commercially available diaphragm, lithium sheet, battery case and nickel mesh by using general conventional methods. The cyclic stability curve of iron (Il) oxalate anode material reconstructed by copper atoms can be obtained through the
Sunway battery test cabinet, as shown in Fig. 3.
Example 3
A method for preparing a high-capacity iron (Il) oxalate material by a nickel and cobalt atom combined surface reconstruction strategy comprises the following specific steps:
S1, dispersing iron (Il) oxalate high-capacity material in a mixed solution consisting of 80 ml absolute ethanol, 10 mI NMP and 10 ml deionized water to obtain a uniformly dispersed mixed solution; among them, the ratio of metal oxyacid salt to mixed solution is 1 g:100 ml;
S2, adding 0.01 g of nickel sulfate hexahydrate and 0.01 g of cobalt sulfate heptahydrate into the mixed solution obtained in S1, and reacting at 50°C for 6 h; filtering, washing and drying after the reaction, and obtaining the iron (Il) oxalate material containing crystal water with nickel and cobalt atoms combined surface reconstruction;
S3, sintering the surface reconstructed material containing crystal water obtained in
S3 at 300°C for 4 h in an inert atmosphere to obtain the high-capacity lithium-ion battery anode material with nickel and cobalt atoms combined surface reconstructed.
Example 4
A cobalt atom surface reconstruction strategy for preparing high-capacity coppét/503745 hydroxide material comprises the following specific steps:
S1, dispersing a high-capacity anode material of copper hydroxide in a mixed solution consisting of 80 ml absolute ethanol, 10 ml deionized water, 0.5 g CTAB and 2 mi concentrated hydrochloric acid to obtain a uniformly dispersed mixed solution; Among them, the ratio of metal oxyacid salt to mixed solution is 1 g: 90 ml;
S2, adding 6.3 g of cobalt nitrate hexahydrate into the mixed solution obtained in S1, and reacting at 80°C for 24 h; filtering, washing and drying after the reaction is finished to obtain the material with surface reconstruction containing crystal water;
And S3, sintering the material with the surface reconstruction of crystal water obtained in S3 at 300°C for 4 h in an inert atmosphere to obtain the high-capacity lithium- ion battery anode material with the surface reconstruction of cobalt atoms.
Example 5
A manganese atom surface reconstruction strategy for preparing a high-capacity iron (Il) carbonate material comprises the following specific steps:
S1, dispersing iron (Il) carbonate high-capacity material in a mixed solution consisting of 30 ml absolute ethanol, 60 ml deionized water, 1 ml concentrated hydrochloric acid, 0.5 g Pss and 2.5 g ascorbic acid to obtain a uniformly dispersed mixed solution; among them, the ratio of metal oxyacid salt to mixed solution is 1 g:90 ml;
S2, adding 5.5 g of ferrous sulfate heptahydrate into the mixed solution obtained in
S1, and reacting at 80°C for 24 h; filtering, washing and drying after the reaction is finished to obtain the material with surface reconstruction containing crystal water;
And S3, sintering the material with the surface reconstruction of crystal water obtained in S3 at 300°C for 4 h in an inert atmosphere to obtain the high-capacity lithium- ion battery anode material with the surface reconstruction of manganese atoms.
Claims (5)
1. A method for designing a high-capacity electrode material by particle surface reconstruction, comprising: s1, dispersing a metal oxysalt high-capacity negative electrode material in a mixed solution of an organic solvent and deionized water to obtain a uniformly dispersed mixed solution, wherein the mass-volume ratio of the metal oxysalt to the mixed solution is 0.1- 1 9:50-200 ml; s2, adding soluble metal salt into the mixed solution obtained in s1, reacting at O- 200°C for 5-72 h, filtering, washing and drying to obtain the surface reconstructed material containing the crystal water; s3, sintering the surface reconstructed material containing the crystal water obtained in s3 at 200-350°C for 4-10 h under vacuum or inert atmosphere to obtain the surface reconstructed high-capacity lithium-ion battery anode material.
2. The method for designing a high-capacity electrode material by particle surface reconstruction according to claim 1, characterized in that the organic solvent in s1 comprises one or more of absolute ethanol, ethylene glycol, CTAB, NMP, DMA, DMSO and DMF.
3. The method for designing a high-capacity electrode material by particle surface reconstruction according to claim 1, characterized in that the mixed solution in s1 further comprises one or more of PDDA, Pss, sulfuric acid and hydrochloric acid.
4. The method for designing a high-capacity electrode material by particle surface reconstruction according to claim 1, characterized in that the soluble metal salts in s2 include one or more of nitrates, sulfates and acetates of transition metal.
5. The method for designing a high-capacity electrode material by particle surfad&/503745 reconstruction according to claim 1, characterized in that the molar ratio of soluble metal salt to metal oxyacid salt in s2 is 0.01-1:1-0.01.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111084918.5A CN113964301A (en) | 2021-09-16 | 2021-09-16 | Method for designing high-capacity electrode material by particle surface reconstruction |
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| US10256459B1 (en) * | 2017-09-18 | 2019-04-09 | Nanotek Instruments, Inc. | Surface-stabilized and prelithiated anode active materials for lithium batteries and production method |
| CN110729481A (en) * | 2019-10-24 | 2020-01-24 | 湖北大学 | Lithium ion battery negative active material MnxFe1-xC2O4Synthetic method and application |
| CN111180708B (en) * | 2020-01-16 | 2022-04-08 | 昆明理工大学 | Lithium ion battery ferrous oxalate composite negative electrode material and preparation method thereof |
| CN111180709B (en) * | 2020-01-16 | 2022-04-05 | 昆明理工大学 | Carbon nano tube and metal copper co-doped ferrous oxalate lithium battery composite negative electrode material and preparation method thereof |
| CN112174220B (en) * | 2020-09-22 | 2022-06-28 | 中国计量大学 | Titanium dioxide coated cobaltosic oxide honeycomb pore nanowire material and preparation and application thereof |
| CN113964301A (en) * | 2021-09-16 | 2022-01-21 | 昆明理工大学 | Method for designing high-capacity electrode material by particle surface reconstruction |
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2021
- 2021-09-16 CN CN202111084918.5A patent/CN113964301A/en active Pending
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2022
- 2022-06-28 WO PCT/CN2022/101732 patent/WO2023040409A1/en unknown
- 2022-06-28 LU LU503745A patent/LU503745B1/en active IP Right Grant
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| Publication number | Publication date |
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| WO2023040409A1 (en) | 2023-03-23 |
| CN113964301A (en) | 2022-01-21 |
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