CN113823788A - MnO (MnO)2/MoS2Heterojunction composite material and preparation method and application thereof - Google Patents
MnO (MnO)2/MoS2Heterojunction composite material and preparation method and application thereof Download PDFInfo
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- CN113823788A CN113823788A CN202111094860.2A CN202111094860A CN113823788A CN 113823788 A CN113823788 A CN 113823788A CN 202111094860 A CN202111094860 A CN 202111094860A CN 113823788 A CN113823788 A CN 113823788A
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- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims description 13
- 239000000758 substrate Substances 0.000 claims abstract description 46
- 229910052961 molybdenite Inorganic materials 0.000 claims abstract description 42
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 42
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 37
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002135 nanosheet Substances 0.000 claims abstract description 15
- 239000010405 anode material Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 36
- 239000008367 deionised water Substances 0.000 claims description 26
- 229910021641 deionized water Inorganic materials 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 235000015393 sodium molybdate Nutrition 0.000 claims description 10
- 239000011684 sodium molybdate Substances 0.000 claims description 10
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 10
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000012286 potassium permanganate Substances 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 2
- 229940039790 sodium oxalate Drugs 0.000 claims description 2
- 239000007774 positive electrode material Substances 0.000 abstract description 8
- 230000001351 cycling effect Effects 0.000 abstract description 3
- -1 WS2 Chemical class 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 150000002019 disulfides Chemical class 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QXYJCZRRLLQGCR-UHFFFAOYSA-N molybdenum(IV) oxide Inorganic materials O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 1
- 239000002064 nanoplatelet Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/06—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; 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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
-
- 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
-
- 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
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- 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
Abstract
The invention discloses MnO2/MoS2Heterojunction composite material comprising a substrate and MnO2/MoS2Heterojunction nanosheet structure, MnO2/MoS2Nanosheet structure and baseFirm anchoring between materials by chemical bonds, MnO2/MoS2The nano-sheet structure exists in a heterojunction form, and MnO is2/MoS2The size of the nano-sheet structure is 0.5-5 μm, and the thickness is 1-30 nm. By constructing MnO on the substrate2/MoS2The nano-sheet structure effectively solves the problem that the positive electrode material of the zinc ion battery is in Zn2+The problem of structural collapse in the embedding/separating process is solved, and the higher specific capacity and the cycling stability of the zinc ion battery anode material are effectively improved.
Description
Technical Field
The invention belongs to the technical field of zinc ion battery anode materials, and particularly relates to MnO2/MoS2Heterojunction composite material and preparation method and application thereof.
Background
Rechargeable aqueous zinc ion batteries have attracted attention in high performance energy storage systems for decades, and have the following advantages over other types of energy storage batteries: low cost, environmental friendliness and safety. But lack of suitable cathode materials due to slow intercalation kinetics due to the large size of the hydrated zinc ions. In the last few years, layered metal disulfides, such as WS2、SnS2、VS2And MoS2Due to its large interlayer spacing, great attention has been drawn in battery research.
Use of layered chalcogenide molybdenum dioxide (MoS2) through simple interlayer spacing and hydrophilicity engineering, even initially Zn2+Hosts with poor diffusivity may also tolerate Zn2+Fast diffusion of Zn2+The diffusivity increases by 3 orders of magnitude, making them promising cathodes for challenging multivalent ion batteries. However, MoS2 nanosheets in Zn are also present2+The problem of re-stacking of the nanoplatelets, which occurs during the intercalation/deintercalation process, can lead to capacity fade.
Disclosure of Invention
In order to overcome the defects of the prior art, the inventionAims to provide MnO2/MoS2A heterojunction composite material is prepared by constructing MnO on a substrate2/MoS2The heterojunction composite material effectively improves the structural stability of the zinc ion battery anode material and effectively solves the problem of serious capacity attenuation of the zinc ion battery.
In order to achieve the purpose, the invention adopts the technical scheme that:
MnO (MnO)2/MoS2Heterojunction composite material comprising a substrate and MnO2/MoS2Heterojunction nanosheet structure, MnO2/MoS2MnO for firmly anchoring the nano-sheet structure and the base material through chemical bonds2/MoS2The nano-sheet structure exists in a heterojunction form, and MnO is2/MoS2The size of the nano-sheet structure is 0.5-5 μm, and the thickness is 1-30 nm.
MnO (MnO)2/MoS2The preparation method of the heterojunction composite material comprises the following steps;
a. dissolving a certain amount of sodium molybdate in a deionized water solution containing thiourea and polyethylene glycol, and uniformly stirring to obtain a solution A;
b. transferring the solution A into a stainless steel reaction kettle, and simultaneously immersing the treated substrate into the solution A;
c. placing the reaction kettle containing the solution A and the substrate in an oven, reacting for a certain time at a certain temperature, taking out the substrate after the reaction is finished, and cleaning the substrate with deionized water and ethanol;
d. dissolving a certain amount of potassium permanganate in deionized water solution containing ammonium oxalate, and uniformly stirring to obtain solution B;
e. c, immersing the base material obtained in the step c into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for a certain time at a certain temperature, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A heterojunction composite material.
In the step a, the concentration of sodium molybdate is 10-100mM, and the concentration of thiourea and polyethylene glycol is 50-200 mM.
The reaction temperature in the step c is 120-180 ℃, and the reaction time is 1-48 h.
The substrate in the step c is any one of a carbon felt, a carbon cloth, a copper net and a stainless steel net.
In the step d, the concentration of the sodium oxalate is 1-20 mg/mL.
And e, the organic solvent in the step e is any one of ethanol and ethylene glycol.
In the step e, the reaction temperature is 80-150 ℃, and the reaction time is 0.1-24 h.
The MnO2/MoS2The heterojunction composite material is applied to a zinc ion battery anode material.
The invention has the beneficial effects that:
the preparation process is simple, and the zinc ion battery anode material is loaded on the base material without a binder. The preparation cost is low, and noble metals are not needed as active components.
MnO in the invention2/MoS2The heterojunction ultrathin nanosheet structure has a high specific surface area, is fully contacted with electrolyte, improves the electron transmission and contact area, and has higher battery specific capacity and excellent cycling stability when being used as a zinc ion battery anode material.
The invention constructs MnO on a substrate2/MoS2The nano-sheet structure effectively solves the problem that the positive electrode material of the zinc ion battery is in Zn2+The problem of structural collapse in the embedding/separating process is solved, and the higher specific capacity and the cycling stability of the zinc ion battery anode material are effectively improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 24 hours at the temperature of 160 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 150 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
Example 2
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 24 hours at the temperature of 180 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 150 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
Example 3
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 24 hours at the temperature of 200 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 150 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
Example 4
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 12 hours at the temperature of 200 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 150 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
Example 5
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 6 hours at the temperature of 200 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 150 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
Example 6
a. 30mM of sodium molybdate was dissolved in a deionized water solution containing 50mM of thiourea and 50mM of polyethylene glycol, and stirred uniformly to obtain a solution A.
b. The solution was transferred to a stainless steel reactor while the treated substrate was immersed in solution a.
c. And (3) placing the reaction kettle containing the solution A and the substrate in an oven, reacting for 12 hours at the temperature of 200 ℃, taking out the substrate after the reaction is finished, and cleaning the substrate by using deionized water and ethanol.
d. The obtained substrate was immersed in a solution containing 30mM potassium permanganate and 5mM ammonium oxalate, and stirred for 30min to form a solution B.
e. Immersing the obtained base material into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for 0.5h at the temperature of 180 ℃, taking out the base material, cleaning the base material with deionized water and ethanol, and drying the cleaned base material to obtain MnO2/MoS2A positive electrode material of a zinc ion battery.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. MnO (MnO)2/MoS2A heterojunction composite material comprising a substrate and MnO2/MoS2Heterojunction nanosheet structure, MnO2/MoS2MnO for firmly anchoring the nano-sheet structure and the base material through chemical bonds2/MoS2The nanosheet structure toIn the form of a heterojunction, said MnO2/MoS2The size of the nano-sheet structure is 0.5-5 μm, and the thickness is 1-30 nm.
2. The MnO of claim 12/MoS2The preparation method of the heterojunction composite material is characterized by comprising the following steps;
a. dissolving a certain amount of sodium molybdate in a deionized water solution containing thiourea and polyethylene glycol, and uniformly stirring to obtain a solution A;
b. transferring the solution A into a stainless steel reaction kettle, and simultaneously immersing the treated substrate into the solution A;
c. placing the reaction kettle containing the solution A and the substrate in an oven, reacting for a certain time at a certain temperature, taking out the substrate after the reaction is finished, and cleaning the substrate with deionized water and ethanol;
d. dissolving a certain amount of potassium permanganate in deionized water solution containing ammonium oxalate, and uniformly stirring to obtain solution B;
e. c, immersing the base material obtained in the step c into the solution B, carrying out ultrasonic treatment for a certain time, transferring the base material into a stainless steel reaction kettle, reacting for a certain time at a certain temperature, taking out the base material, cleaning the base material with deionized water and ethanol, and drying to obtain MnO2/MoS2A heterojunction composite material.
3. The MnO of claim 22/MoS2The preparation method of the heterojunction composite material is characterized in that the concentration of sodium molybdate in the step a is 10-100mM, and the concentration of thiourea and polyethylene glycol is 50-200 mM.
4. The MnO of claim 22/MoS2The preparation method of the heterojunction composite material is characterized in that the reaction temperature in the step c is 120-180 ℃, and the reaction time is 1-48 h.
5. The MnO of claim 22/MoS2Preparation method of heterojunction composite materialThe method is characterized in that the substrate in the step c is any one of carbon felt, carbon cloth, copper mesh and stainless steel mesh.
6. The MnO of claim 22/MoS2The preparation method of the heterojunction composite material is characterized in that the concentration of the sodium oxalate in the step d is 1-20 mg/mL.
7. The MnO of claim 22/MoS2The preparation method of the heterojunction composite material is characterized in that the organic solvent in the step e is any one of ethanol and ethylene glycol.
8. The MnO of claim 22/MoS2The preparation method of the heterojunction composite material is characterized in that the reaction temperature in the step e is 80-150 ℃, and the reaction time is 0.1-24 h.
9. MnO according to any of claims 1-82/MoS2A heterojunction composite material, characterized in that said MnO is2/MoS2The heterojunction composite material is applied to a zinc ion battery anode material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335482A (en) * | 2021-12-28 | 2022-04-12 | 陕西科技大学 | MnO (MnO)2-metal heterojunction composite material and preparation method and application thereof |
| CN115084485A (en) * | 2022-07-29 | 2022-09-20 | 陕西科技大学 | Carbon fiber loaded manganese molybdate/manganese oxide nano heterojunction material and preparation method and application thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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