CN114084906B - Rapid preparation method and application of alkali metal ion intercalated vanadium oxide nanobelt - Google Patents
Rapid preparation method and application of alkali metal ion intercalated vanadium oxide nanobelt Download PDFInfo
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- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910001935 vanadium oxide Inorganic materials 0.000 title claims abstract description 50
- 239000002127 nanobelt Substances 0.000 title claims abstract description 33
- 229910001413 alkali metal ion Inorganic materials 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000003839 salts Chemical class 0.000 claims abstract description 27
- 239000007774 positive electrode material Substances 0.000 claims abstract description 18
- -1 alkali metal salt compounds Chemical class 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000376 reactant Substances 0.000 claims abstract description 8
- 238000009830 intercalation Methods 0.000 claims abstract description 6
- 230000002687 intercalation Effects 0.000 claims abstract description 6
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 16
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 10
- 239000012265 solid product Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229910021551 Vanadium(III) chloride Inorganic materials 0.000 claims description 5
- 235000010344 sodium nitrate Nutrition 0.000 claims description 5
- 239000004317 sodium nitrate Substances 0.000 claims description 5
- HQYCOEXWFMFWLR-UHFFFAOYSA-K vanadium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[V+3] HQYCOEXWFMFWLR-UHFFFAOYSA-K 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 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 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 5
- 150000003681 vanadium Chemical class 0.000 abstract description 5
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 4
- 239000010410 layer Substances 0.000 abstract description 4
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 4
- 150000001450 anions Chemical class 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011229 interlayer Substances 0.000 abstract description 2
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical group [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007800 oxidant agent Substances 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 3
- 239000010405 anode material Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002070 nanowire Substances 0.000 description 3
- 235000010333 potassium nitrate Nutrition 0.000 description 3
- 239000004323 potassium nitrate Substances 0.000 description 3
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- VLOPEOIIELCUML-UHFFFAOYSA-L vanadium(2+);sulfate Chemical compound [V+2].[O-]S([O-])(=O)=O VLOPEOIIELCUML-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910013553 LiNO Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- AZFUOHYXCLYSQJ-UHFFFAOYSA-N [V+5].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O Chemical compound [V+5].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O AZFUOHYXCLYSQJ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006181 electrochemical material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 239000011701 zinc 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
-
- 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
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- 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
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/006—Compounds containing, besides vanadium, two or more other elements, with the exception of oxygen or hydrogen
-
- 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
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
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Abstract
The invention relates to a rapid preparation method and application of an alkali metal ion intercalated vanadium oxide nano-belt, wherein vanadium salt with decomposable anions is used as a reactant, alkali metal salt compounds are used as molten salt, and the alkali metal ion intercalated vanadium oxide nano-belt is successfully prepared by adopting a molten salt method. In the whole reaction process, the molten salt provides a reaction environment, low-valence vanadium is oxidized into high-valence vanadium (the oxidant is nitrate radical in the molten salt or oxygen in the atmosphere) to form layered vanadium oxide, and meanwhile, alkali metal ions in the molten salt are intercalated into the generated vanadium oxide interlayer to play a role in stabilizing the layer structure. The preparation method is simple and easy to operate, and can easily realize large-scale production. Because the synthesized vanadium oxide has smaller size, larger specific surface area and the function of an intercalation alkali metal ion stabilizing layer structure, the vanadium oxide shows high electrochemical activity, excellent multiplying power performance and cycle stability when being applied to a zinc ion battery as a positive electrode material.
Description
Technical Field
The invention belongs to the technical field of electrochemical materials, and relates to a rapid preparation method and application of an alkali metal ion intercalated vanadium oxide nanobelt.
Background
The development of efficient, safe, reliable energy storage devices is one of the effective ways to connect and make available discontinuous renewable energy sources for human use. In comparison with lithium ion batteries, neutral aqueous secondary batteries have been receiving attention because they use a neutral aqueous solution as an electrolyte, resulting in high safety and reliability. The zinc ion battery has the advantages of high theoretical specific capacity (819 mAh g -1) and high stability (-0.763V vs. SHE), low cost, no toxicity, easy processing and the like, and becomes the second generation energy storage device with the most potential. As a positive electrode material of a zinc ion battery, vanadium oxide is considered as the most promising positive electrode material of a zinc ion battery due to its high theoretical specific capacity and faster reaction kinetics.
However, the poor intrinsic electron conductivity and structural stability of vanadium oxides have limited the further development and practical application of Zn/V xOy -based zinc ion batteries.
Literature "He P,Zhang G,Liao X,et al.Sodium ion stabilized vanadium oxide nanowire cathode for high-performance zinc-ion batteries[J].Advanced Energy Materials,2018,8(10):1702463." discloses a preparation method of a zinc ion battery anode material. The method synthesizes the vanadium oxide nanowire with stable sodium ions by adopting a two-step hydrothermal method and is used for the positive electrode material of the zinc ion battery, but the method has the advantages of high energy consumption and long time consumption, and the limitation of reaction conditions makes the vanadium oxide nanowire incapable of large-scale production, so that the practical application of the method is restricted.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a rapid preparation method and application of an alkali metal ion intercalated vanadium oxide nano-belt, solves the problems that the existing method for preparing the zinc ion battery anode material vanadium oxide is large in energy consumption, long in time consumption and unfavorable for realizing large-scale production, and provides a simple and easily-realized rapid preparation method and application of the alkali metal ion intercalated vanadium oxide nano-belt for mass production.
Technical proposal
A rapid preparation method of an alkali metal ion intercalated vanadium oxide nanobelt is characterized by comprising the following steps:
Step 1: heating a target alkali metal compound salt raw material to a temperature above the melting point to form molten salt in a molten state;
step 2: quickly adding vanadium salt into molten salt, and keeping the temperature for less than 10 minutes to fully react;
the vanadium salt content is not more than 50% of the alkali metal salt mass;
step 3: after the reaction is finished, naturally cooling the reactant to room temperature to form a solid product;
Step 4: washing the solid product obtained in the step 3 to remove redundant alkali metal compound salts, and drying to enable alkali metal ions to be intercalated into a layered structure of the vanadium oxide, so as to obtain the alkali metal ion intercalated vanadium oxide nanobelt.
The alkali metal salt compound is one or more of lithium nitrate LiNO 3, sodium nitrate NaNO 3, potassium nitrate KNO 3, lithium chloride LiCl, sodium chloride NaCl and potassium chloride KCl.
The vanadium salts specifically decompose anions including, but not limited to, chloride, nitrate, or sulfate.
An application method of an alkali metal ion intercalation vanadium oxide nano-belt prepared by a preparation method is characterized in that: the application of the alkali metal ion intercalated vanadium oxide nano-belt as a positive electrode material of a zinc ion battery.
Advantageous effects
The invention provides a rapid preparation method and application of an alkali metal ion intercalated vanadium oxide nano-belt, wherein vanadium salt with decomposable anions is used as a reactant, alkali metal salt compounds are used as molten salt, and the alkali metal ion intercalated vanadium oxide nano-belt is successfully prepared by adopting a molten salt method. In the whole reaction process, the molten salt provides a reaction environment, low-valence vanadium is oxidized into high-valence vanadium (the oxidant is nitrate radical in the molten salt or oxygen in the atmosphere) to form layered vanadium oxide, and meanwhile, alkali metal ions in the molten salt are intercalated into the generated vanadium oxide interlayer to play a role in stabilizing the layer structure. The preparation method is simple and easy to operate, and can easily realize large-scale production. Because the synthesized vanadium oxide has smaller size, larger specific surface area and the function of an intercalation alkali metal ion stabilizing layer structure, the vanadium oxide shows high electrochemical activity, excellent multiplying power performance and cycle stability when being applied to a zinc ion battery as a positive electrode material.
The invention solves the problems of poor conductivity and stability of the vanadium oxide of the existing zinc ion battery anode material, large energy consumption, long time consumption and difficult realization of large-scale production of the synthetic method.
Drawings
FIG. 1 is a flow chart of the preparation of an alkali metal ion intercalated vanadium oxide nanobelt;
FIG. 2 is a scanning electron microscope image of a lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelt prepared in example 1 of the present invention;
FIG. 3 is an X-ray diffraction pattern of lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelts prepared in example 1 of the present invention;
FIG. 4 is a graph showing the rate performance of the lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelt prepared in example 1 of the present invention as a positive electrode material of a zinc ion battery;
FIG. 5 is a cycle performance chart of the lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelt prepared in example 1 of the present invention as a positive electrode material of a zinc ion battery;
Detailed Description
The invention will now be further described with reference to examples, figures:
Example 1
The preparation method of the lithium ion intercalation vanadium oxide (LiV 2.5O6.75-x) of the positive electrode material of the zinc ion battery comprises the following steps:
1) Weighing 10g of lithium nitrate, placing the lithium nitrate into a crucible, and heating the crucible in a muffle furnace at 350 ℃ to melt the lithium nitrate to form molten salt;
2) Placing 400mg of vanadium trichloride weighed in advance into the molten salt obtained in the step 1), and enabling the vanadium trichloride to interact for 1min;
3) After the step 2) is finished, naturally cooling the reactant to room temperature;
4) Washing the solid product obtained in the step 3) with water to remove redundant metal compound salts, and drying to obtain the lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelt. Fig. 2 shows a scanning electron microscope image of the lithium ion intercalated vanadium oxide obtained in this embodiment, and the morphology of the lithium ion intercalated vanadium oxide is seen to be a nanobelt. FIG. 3 is an X-ray diffraction pattern of the nanobelt obtained in this example, the diffraction peak of which corresponds to standard card JCPDS:22-0422 (LiV 2.5O6.75-x) and has no impurity phase.
In order to further verify the electrochemical properties of the above positive electrode material, step 5) was also performed as follows:
5) And (3) preparing a pole piece from the lithium ion intercalated vanadium oxide (LiV 2.5O6.75-x) nanobelt obtained in the step (4), and assembling the pole piece as a positive electrode material of the zinc ion battery to form the zinc ion battery. As can be seen from fig. 4, the positive electrode material of the zinc-ion battery prepared in this example shows excellent rate performance. At a current density of 0.05 amp gram -1, a specific capacity in excess of 300 milliamp hour gram -1 is available, even at a large magnification of 2 amp gram -1, up to 137 milliamp Shi Ke -1 is available. As can be seen from fig. 5, after the positive electrode material of the zinc ion battery prepared in this embodiment circulates 1000 times under the current density of 1 ampere gram -1, the specific capacity up to 151 milliampere Shi Ke -1 can still be obtained, and the good circulation stability is achieved.
Example 2:
1) Weighing 5g of sodium chloride, placing in a crucible, and heating in a muffle furnace at 850 ℃ to enable the sodium chloride to be melted into molten salt;
2) Placing 1g of vanadium nitrate weighed in advance into the molten salt obtained in the step 1), and enabling the molten salt to interact for 5min;
3) After the step 2) is finished, naturally cooling the reactant to room temperature;
4) Washing the solid product obtained in the step 3) with water to remove redundant metal compound salts, and drying to obtain the sodium ion intercalated vanadium oxide (Na 1.1V3O7.9) nanobelt.
5) The sodium ion intercalation vanadium oxide (Na 1.1V3O7.9) nanobelt obtained in the step 4) is made into a pole piece, and the pole piece is used as a positive electrode material of a zinc ion battery to be assembled into the zinc ion battery, so that the zinc ion battery can show excellent multiplying power performance and cycle stability, can obtain the specific capacity of up to 106 milliamp gram -1 under the current density of up to 2 ampere grams -1, and can still obtain the specific capacity of more than 118 milliamp gram -1 after being cycled for more than 1000 times under the current density of 1 ampere gram -1.
Example 3:
1) Weighing 10g of potassium nitrate, placing in a crucible, and heating in a muffle furnace at 380 ℃ to enable the potassium nitrate to be melted into molten salt;
2) Placing the 5 vanadium sulfate weighed in advance into the molten salt obtained in the step 1), and enabling the 5 vanadium sulfate to interact for 8 minutes;
3) After the step 2) is finished, naturally cooling the reactant to room temperature;
4) Washing the solid product obtained in the step 3) with water to remove redundant alkali metal compound salts, and drying to obtain the potassium ion intercalated vanadium oxide (KV 3O8) nanobelt.
5) The potassium ion intercalated vanadium oxide (KV 3O8) nanobelts obtained in the step 4) are manufactured into pole pieces, and the pole pieces are used as a positive electrode material of a zinc ion battery to be assembled into the zinc ion battery, so that the zinc ion battery can show excellent electrochemical performance, and can still obtain the capacity retention rate of up to 82% after being cycled for more than 1000 times under the current density of 1 ampere gram -1.
Example 4:
1) 5g of lithium nitrate and 5g of sodium nitrate (mass ratio of lithium nitrate to sodium nitrate is 1: 1) Placing the molten salt in a crucible, and heating the molten salt in a muffle furnace at 320 ℃ to melt the molten salt to form molten salt;
2) Placing 2g of vanadium trichloride weighed in advance into the molten salt obtained in the step 1), and enabling the vanadium trichloride to interact for 2min;
3) After the step 2) is finished, naturally cooling the reactant to room temperature;
4) Washing the solid product obtained in the step 3) with water to remove redundant metal compound salts, and drying to obtain the lithium and sodium double-ion co-intercalated vanadium oxide (LiV 3O8@Na1.1V3O7.9) nano-belt.
5) The lithium and sodium double-ion co-intercalated vanadium oxide (LiV 3O8@Na1.1V3O7.9) nanobelt obtained in the step 4) is made into a pole piece, and is used as a positive electrode material of a zinc ion battery to be assembled into the zinc ion battery, so that the zinc ion battery can show excellent multiplying power performance and cycle stability, can obtain the specific capacity of up to 236 milliampere hour -1 under the current density of up to 5 ampere grams -1, and can still obtain the specific capacity of more than 274 milliampere Shi Ke -1 after being cycled for more than 2000 times under the current density of 2 ampere grams -1.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (1)
1. An application method of an alkali metal ion intercalated vanadium oxide nano-belt is characterized in that: application of alkali metal ion intercalation vanadium oxide nano-belt as positive electrode material of zinc ion battery;
The preparation method of the alkali metal ion intercalated vanadium oxide nanobelt comprises the following steps:
1) Weighing 5 g lithium nitrate and 5 g sodium nitrate, placing in a crucible, and heating in a muffle furnace at 320 ℃ to melt the lithium nitrate and the sodium nitrate to form molten salt;
2) Placing the previously weighed 2g vanadium trichloride into the molten salt obtained in the step 1) to enable the molten salt to interact 2 min;
3) After the step 2) is finished, naturally cooling the reactant to room temperature;
4) Washing the solid product obtained in the step 3) with water to remove redundant metal compound salts, and drying to obtain a lithium and sodium double-ion co-intercalated vanadium oxide LiV 3O8@Na1.1V3O7.9 nano-belt;
5) The lithium and sodium double-ion co-intercalated vanadium oxide LiV 3O8@Na1.1V3O7.9 nano-belt obtained in the step 4) is made into a pole piece, and is used as a positive electrode material of a zinc ion battery to be assembled into the zinc ion battery, so that the zinc ion battery can show excellent multiplying power performance and cycle stability, the specific capacity of up to 236 milliamp gram −1 is obtained under the current density of up to 5 ampere grams −1, and the specific capacity of more than 274 milliamp grams −1 is obtained under the current density of 2 ampere grams −1 in a cycle of more than 2000 times.
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