CN113213535A - VS capable of being simultaneously applied to positive electrode and negative electrode and with controllable structure2Preparation method of micro-flower electrode material - Google Patents
VS capable of being simultaneously applied to positive electrode and negative electrode and with controllable structure2Preparation method of micro-flower electrode material Download PDFInfo
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- 239000007772 electrode material Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title description 4
- 239000000243 solution Substances 0.000 claims abstract description 50
- 238000005303 weighing Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000004729 solvothermal method Methods 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims abstract description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 11
- 239000011593 sulfur Substances 0.000 claims abstract description 11
- 238000000967 suction filtration Methods 0.000 claims abstract description 7
- YUKQRDCYNOVPGJ-UHFFFAOYSA-N thioacetamide Chemical compound CC(N)=S YUKQRDCYNOVPGJ-UHFFFAOYSA-N 0.000 claims description 17
- DLFVBJFMPXGRIB-UHFFFAOYSA-N thioacetamide Natural products CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 7
- 238000004108 freeze drying Methods 0.000 claims description 7
- 238000003760 magnetic stirring Methods 0.000 claims 2
- 239000010406 cathode material Substances 0.000 abstract description 4
- 229910001413 alkali metal ion Inorganic materials 0.000 abstract description 2
- 239000010405 anode material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 9
- 241000209094 Oryza Species 0.000 description 8
- 235000007164 Oryza sativa Nutrition 0.000 description 8
- 235000009566 rice Nutrition 0.000 description 8
- NGTSQWJVGHUNSS-UHFFFAOYSA-N bis(sulfanylidene)vanadium Chemical compound S=[V]=S NGTSQWJVGHUNSS-UHFFFAOYSA-N 0.000 description 6
- 230000035484 reaction time Effects 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- FHANEPRSLAMSJU-UHFFFAOYSA-N vanadium(4+);disulfide Chemical group [S-2].[S-2].[V+4] FHANEPRSLAMSJU-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 241000482268 Zea mays subsp. mays Species 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical class [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
-
- 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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/581—Chalcogenides or intercalation compounds thereof
- H01M4/5815—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- 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
Abstract
The invention discloses a VS with controllable structure and simultaneously applicable to positive and negative electrodes2The preparation method of the electrode material of the micro-flower comprises the following steps: firstly, according to V (water): weighing 40-50 ml of water and 8-10 ml of ammonia water to prepare a mixed solution according to the proportion of V (ammonia water) to 5:1, weighing a vanadium source, adding the vanadium source into the mixed solution, and stirring the mixed solution by using a magnetic stirrer at room temperature to obtain a solution A with the concentration of the vanadium source being 0.11-0.22 mol/L; weighing a sulfur source, adding the sulfur source into the solution A, and stirring by using a magnetic stirrer at room temperature to obtain a solution B with the sulfur source concentration of 0.67-1.19 mol/L; weighing 0.1-1 g of nitrogen-doped carbon quantum dots, and adding the nitrogen-doped carbon quantum dots into the solution B to obtain a solution C; transferring the solution C into a polytetrafluoroethylene lining, and putting the polytetrafluoroethylene lining into an oven for solvothermal reaction at the temperature of 140-200 ℃ for 16-24 hours; fifthly, the product is collected by suction filtration, and is frozen and dried after being washed to obtain VS2A micro-flower electrode material; the invention is simple in processMono, the product has uniform structure, and VS is obtained2The micro-flower has excellent performance in the anode and cathode materials of the alkali metal ion battery.
Description
Technical Field
The invention belongs to the field of battery electrode materials, and particularly relates to a VS with a controllable structure and capable of being simultaneously applied to a positive electrode and a negative electrode2A preparation method of a micro-flower electrode material.
Background
With the exacerbation of energy crisis and environmental pollution, the development of new energy storage devices has received great attention.
A.s.aric, p.bruce, b.scrosati, j.m.tarascon, w.van schalkwijk, nanostrucrured materials for advanced dender gyc conversion and storage devices. nat.mater.4, 366-377 (2005). Vanadium disulfide is of great interest because of its large interlayer spacing, excellent metallic properties, and good electrical conductivity. LiuYY, XuL, GuoXT, equivalent. Vanadiumsufide substrates Synthesis, energytorageandconversion [ J ]. journal of materials chemistry A,2020,8. different topographical structures determine different properties. Meanwhile, most of the research is mainly focused on the research of vanadium disulfide cathode materials, while the research of vanadium disulfide cathode materials is less, Carbon Quantum Dots (CQDs) are used as a novel zero-dimensional carbon material with the size less than 10nm, and the carbon quantum dots have the advantages of unique quantum size effect, surface effect, dielectric confinement effect and the like, so that the application of the carbon quantum dots in the field of energy storage gradually draws the attention of researchers in recent years. ZhuY, LiJ, Yunx, equivalent, graphic CarbonQuantum DotsmodifiedNickel cobalt and summary of materials for AlkalineAqueous batteries [ J ] 2020,12(1):1-18.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide a VS with controllable structure, which can be simultaneously applied to a positive electrode and a negative electrode2The preparation method of the micro-flower electrode material is simple, does not need high-temperature calcination, has controllable morphology, and can be simultaneously applied to positive and negative electrode materials.
In order to achieve the purpose, the invention adopts the technical scheme that:
VS capable of being simultaneously applied to positive electrode and negative electrode and with controllable structure2The preparation method of the micro-flower electrode material comprises the following steps:
step one, according to V (water): weighing 40-50 ml of water and 8-10 ml of ammonia water to prepare a mixed solution according to the proportion of V (ammonia water) to 5:1, weighing a vanadium source, adding the vanadium source into the mixed solution, and stirring the mixed solution by using a magnetic stirrer at room temperature to obtain a solution A with the concentration of the vanadium source being 0.11-0.22 mol/L;
weighing a sulfur source, adding the sulfur source into the solution A, and stirring by using a magnetic stirrer at room temperature to obtain a solution B with the sulfur source concentration of 0.67-1.19 mol/L;
step three, weighing 0.1-1 g of nitrogen-doped carbon quantum dots, and adding the nitrogen-doped carbon quantum dots into the solution B to obtain a solution C;
and step four, transferring the solution C into a polytetrafluoroethylene lining, and putting the polytetrafluoroethylene lining into an oven for solvothermal reaction at the temperature of 140-200 ℃ for 16-24 hours.
Step five, collecting the product of the solvothermal reaction in a suction filtration mode, and freeze-drying for 12 hours after washing to obtain VS2A micro-flower electrode material.
The invention also has the following technical characteristics:
preferably, in the first step, the vanadium source is ammonium metavanadate.
Preferably, the stirring time in the first step is 15-40 min, and the rotating speed is 500-700 r/min.
Preferably, the sulfur source in the second step is thioacetamide.
Preferably, the stirring time in the second step is 40-60 min, and the rotating speed is 500-700 r/min.
Preferably, the filling ratio of the polytetrafluoroethylene lining in the fourth step is 64-80%.
Preferably, the washing mode in the fifth step is washing with water and ethanol alternately for three times.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a one-step solvothermal method, has simple process, low energy consumption, high yield, suitability for large-scale production and low production cost, does not need high-temperature calcination;
VS prepared by the invention2The micro-flower electrode material has high purity and crystallinity, and VS can be regulated and controlled by regulating the vanadium source proportion2The size and the shape structure of the micro popcorn;
according to the preparation method, a certain amount of nitrogen-doped carbon quantum dots are added in the synthesis process, and the nitrogen-doped carbon quantum dots are used as a structure directing agent and a conductive agent, so that the vanadium disulfide structure is further regulated and controlled, and the electrochemical performance of the vanadium disulfide structure is enhanced;
resulting VS2The micro-flower has excellent performance in the anode material and the cathode material of the alkali metal ion battery.
Drawings
FIG. 1 is VS prepared in example 22XRD diffraction pattern of the micro-flower rice, wherein the abscissa is 2 theta angle and the ordinate is intensity
FIG. 2 is VS prepared in example 22SEM image of micro-flower
FIG. 3 is VS prepared in example 32SEM image of micro-flower
FIG. 4 is VS prepared in example 32Sodium cathode cycle performance diagram of micro-flower rice, wherein the abscissa is cycle number and the ordinate is capacity (mAh/g)
FIG. 5 is VS prepared in example 42The positive electrode rate performance diagram of the lithium battery of the micro-flower rice, wherein the abscissa is the cycle number and the ordinate is the capacity (mAh/g)
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
Example 1:
weighing a certain amount of ammonium metavanadate, adding the ammonium metavanadate into a mixed solution of 40ml of water and 8ml of ammonia water, and stirring for 15min at room temperature by using a magnetic stirrer at the rotating speed of 500r/min to obtain a solution A with the concentration of 0.11 mol/l. Weighing a certain amount of thioacetamide, adding the thioacetamide into the solution A, and stirring the thioacetamide for 40min at room temperature by using a magnetic stirrer at the rotating speed of 500r/min to obtain a solution B with the concentration of 0.67 mol/l. 0.1g of dope was added to the solution BAnd (5) nitrogen-carbon quantum dots to obtain a solution C. Transferring the solution C into a polytetrafluoroethylene lining, wherein the filling ratio is 64%; putting the mixture into an oven, wherein the solvothermal reaction temperature is 140 ℃, and the reaction time is 16 h. Collecting the product of the solvothermal reaction in a suction filtration mode, alternately washing with water and ethanol for three times, and freeze-drying for 12 hours to obtain VS2Micro-flower of rice.
Example 2:
weighing a certain amount of ammonium metavanadate, adding the ammonium metavanadate into a mixed solution of 45ml of water and 9ml of ammonia water, and stirring the mixture for 40min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution A with the concentration of 0.17 mol/l. Weighing a certain amount of thioacetamide, adding the thioacetamide into the solution A, and stirring the thioacetamide for 40min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution B with the concentration of 0.89 mol/l. 0.2g of nitrogen-doped carbon quantum dots was added to the solution B to obtain a solution C. Transferring the solution C into a polytetrafluoroethylene lining with a filling ratio of 72%; putting the mixture into an oven, wherein the solvothermal reaction temperature is 160 ℃, and the reaction time is 24 h. Collecting the product of the solvothermal reaction in a suction filtration mode, alternately washing with water and ethanol for three times, and freeze-drying for 12 hours to obtain VS2Micro-flower of rice.
FIG. 1 is VS prepared in example 22The XRD diffraction pattern of the micro-flowers shows that all diffraction peaks correspond to pdf cards of 36-1139, and the synthesis of pure-phase vanadium disulfide is proved. FIG. 2 is VS prepared in example 22The SEM image of the micro-flower can see that flower-shaped vanadium disulfide with the particle size of about 50 microns is synthesized.
Example 3:
weighing a certain amount of ammonium metavanadate, adding the ammonium metavanadate into a mixed solution of 45ml of water and 9ml of ammonia water, and stirring the mixture for 30min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution A with the concentration of 0.22 mol/l. Weighing a certain amount of thioacetamide, adding the thioacetamide into the solution A, and stirring the thioacetamide for 40min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution B with the concentration of 1.19 mol/l. 0.5g of nitrogen-doped carbon quantum dots was added to the solution B to obtain a solution C. Transferring the solution C into a lining of polytetrafluoroethylene with a filling ratio of 72%; putting the mixture into an oven, wherein the solvothermal reaction temperature is 160 ℃, and the reaction time is 24 h. The product of the solvothermal reaction is pumpedCollecting by filtration, washing with water and ethanol alternately for three times, and freeze-drying for 12h to obtain VS2Micro-flower of rice.
FIG. 3 is VS prepared in example 32The SEM image of the micro-flower shows that flower-shaped vanadium disulfide with the particle size of about 10 microns is synthesized; the micro-flowers are reduced in size compared to fig. 2, demonstrating that the structure of the synthetic micro-flowers is controllable.
FIG. 4 is VS prepared in example 32The sodium electrocathodal cycle performance of the micro-flowers showed a capacity of 307mAh/g after 100 cycles at a current density of 0.2A/g.
Example 4:
weighing a certain amount of ammonium metavanadate, adding the ammonium metavanadate into a mixed solution of 40ml of water and 8ml of ammonia water, and stirring the mixture for 30min at room temperature by using a magnetic stirrer at the rotating speed of 700r/min to obtain a solution A with the concentration of 0.19 mol/l. Weighing a certain amount of thioacetamide, adding the thioacetamide into the solution A, and stirring the thioacetamide for 50min at room temperature by using a magnetic stirrer at the rotating speed of 700r/min to obtain a solution B with the concentration of 1 mol/l. 0.7g of nitrogen-doped carbon quantum dots was added to the solution B to obtain a solution C. Transferring the solution C into a lining of polytetrafluoroethylene with a filling ratio of 64%; putting the mixture into an oven, and carrying out solvothermal reaction at 180 ℃ for 24 hours. Collecting the product of the solvothermal reaction in a suction filtration mode, alternately washing with water and ethanol for three times, and freeze-drying for 12 hours to obtain VS2Micro-flower of rice.
FIG. 5 is VS prepared in example 32The lithium battery anode cycle performance diagram of the micro-flowers has the capacities of 140, 92, 60 and 35mAh/g under the current densities of 0.1A/g, 0.2A/g, 0.5A/g and 1A/g respectively, and still has the capacity of 115mAh/g under the current density of 0.1A/g.
Example 5:
weighing a certain amount of ammonium metavanadate, adding the ammonium metavanadate into a mixed solution of 50ml of water and 10ml of ammonia water, and stirring the mixture for 30min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution A with the concentration of 0.2 mol/l. Weighing a certain amount of thioacetamide, adding the thioacetamide into the solution A, and stirring the thioacetamide for 60min at room temperature by using a magnetic stirrer at the rotating speed of 600r/min to obtain a solution B with the concentration of 1.07 mol/l. And adding 1g of nitrogen-doped carbon quantum dots into the solution B to obtain a solution C. Will be provided withTransferring the solution C into a lining of polytetrafluoroethylene, wherein the filling ratio is 80%; putting the mixture into an oven, wherein the solvothermal reaction temperature is 200 ℃, and the reaction time is 24 h. Collecting the product of the solvothermal reaction in a suction filtration mode, alternately washing with water and ethanol for three times, and freeze-drying for 12 hours to obtain VS2Micro-flower of rice.
Claims (7)
1. VS capable of being simultaneously applied to positive electrode and negative electrode and with controllable structure2The preparation method of the micro-flower electrode material is characterized by comprising the following steps:
step one, according to V (water): weighing 40-50 ml of water and 8-10 ml of ammonia water to prepare a mixed solution according to the proportion of V (ammonia water) to 5:1, weighing a vanadium source, adding the vanadium source into the mixed solution, and stirring the mixed solution at room temperature by using a magnetic force to obtain a solution A with the concentration of the vanadium source being 0.11-0.22 mol/L;
step two, weighing a sulfur source, adding the sulfur source into the solution A, and stirring by using a magnetic force at room temperature to obtain a solution B with the sulfur source concentration of 0.67-1.19 mol/L;
step three, weighing 0.1-1 g of nitrogen-doped carbon quantum dots, and adding the nitrogen-doped carbon quantum dots into the solution B to obtain a solution C;
transferring the solution C into a polytetrafluoroethylene lining, and putting the polytetrafluoroethylene lining into an oven for solvothermal reaction at the temperature of 140-200 ℃ for 16-24 hours;
step five, collecting the product of the solvothermal reaction in a suction filtration mode, and freeze-drying the product after washing to obtain VS2A micro-flower electrode material.
2. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the micron flower electrode material is characterized in that the vanadium source in the first step is ammonium metavanadate.
3. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the micron flower electrode material is characterized in that the magnetic stirring time in the first step is 15-40 min, and the rotating speed is 500-700 r/min.
4. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the electrode material of the micro flower is characterized in that the sulfur source in the second step is thioacetamide.
5. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the micron flower electrode material is characterized in that the magnetic stirring time in the second step is 40-60 min, and the rotating speed is 500-700 r/min.
6. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the electrode material of the micro flowers is characterized in that the filling ratio of the solution C added into the polytetrafluoroethylene lining in the fourth step is 64-80%.
7. The positive and negative simultaneously structurally controllable VS according to claim 1 that is applied to2The preparation method of the micro-flower electrode material is characterized in that the washing mode in the fifth step is that water and ethanol are alternately washed for three times.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114975963A (en) * | 2022-06-28 | 2022-08-30 | 陕西科技大学 | VS for synergistically promoting high-capacity high-pseudocapacitance sodium storage 2 /S composite material and preparation method and application thereof |
| CN115124079A (en) * | 2022-06-28 | 2022-09-30 | 陕西科技大学 | VS rich in sulfur vacancy defect 2-x Material, preparation method and application thereof |
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