CN115064679B - Vanadium oxide micron rod cluster and preparation method and application thereof - Google Patents
Vanadium oxide micron rod cluster and preparation method and application thereof Download PDFInfo
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- CN115064679B CN115064679B CN202210779786.6A CN202210779786A CN115064679B CN 115064679 B CN115064679 B CN 115064679B CN 202210779786 A CN202210779786 A CN 202210779786A CN 115064679 B CN115064679 B CN 115064679B
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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 108
- 229910001935 vanadium oxide Inorganic materials 0.000 title claims abstract description 108
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 20
- 229910001415 sodium ion Inorganic materials 0.000 claims abstract description 17
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 239000007772 electrode material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000002073 nanorod Substances 0.000 claims description 7
- -1 vanadium heptaoxide Chemical compound 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 15
- 238000001228 spectrum Methods 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011540 sensing material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- H01M4/364—Composites as mixtures
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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
- C01G31/02—Oxides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles
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- 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
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- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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- H01M4/0483—Processes of manufacture in general by methods including the handling of a melt
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- 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
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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Abstract
The invention aims to provide a vanadium oxide micron rod cluster, a preparation method and application thereof. The preparation method of the vanadium oxide micron rod cluster comprises the following steps: (1) Placing vanadium pentoxide powdery substances into a metal boat; (2) Electrifying the metal boat in an air environment at room temperature, and heating the vanadium pentoxide powdery substances in the metal boat to 1000-1300 ℃ to enable the vanadium pentoxide powdery substances to be melted into liquid vanadium oxide; (3) And cutting off the power supply, and cooling and solidifying the liquid vanadium oxide under the natural thermal diffusion condition to form the vanadium oxide micron rod cluster as set forth in claim 1 or 2. The preparation method is beneficial to large-scale industrial production. The vanadium oxide micron rod cluster is expected to show excellent electrochemical performance and very sensitive gas sensing performance when being applied to lithium/sodium ion batteries and gas sensors.
Description
Technical Field
The invention relates to the technical field of electronic raw materials, in particular to a vanadium oxide micron rod cluster and a preparation method and application thereof.
Background
In recent years, research and application of lithium/sodium ion batteries are more and more intensive, and in order to improve the performance of lithium/sodium ion batteries, selection of proper electrode materials to improve the specific capacity of lithium/sodium ion batteries has been a hotspot for scientific research and battery application. The specific capacity of the electrode materials of the lithium ion battery such as lithium cobaltate which are commercially used at present is only about 140mAh/g; the specific capacity of lithium manganate is also relatively low, about 148mAh/g, and the cycling stability is poor; although the specific capacity of lithium nickelate can reach 150mAh/g, lithium is easy to be lost in the synthesis process of lithium nickelate; the theoretical specific capacity of lithium iron phosphate is high and can reach 170mAh/g, but the conductivity is poor and the energy density is low. The above factors have long restricted the improvement of the performance of lithium/sodium ion batteries, and thus, the application requirements of lithium/sodium ion batteries are urgent for research and development of novel high-performance electrode materials.
Vanadium oxide has a unique layered structure, and lithium/sodium ions are easily intercalated therein. Wang et al prepared the hollow microsphere of vanadium oxide, measured that its specific capacity can reach 447.9mAh/g the highest when it is used as lithium ion battery electrode material, and have good cyclic stability (J.Wang,et al,Multi-shelled metal oxides prepared via an anion-adsorption mechanism for lithium-ion batteries,Nature Energy 2016,1,16050). this numerical value is very much higher than the specific capacity of lithium/sodium ion battery electrode material of commercial use at present, therefore vanadium oxide is a lithium/sodium ion battery electrode material that has great potential. However, the wet reaction process adopted for preparing the vanadium oxide hollow microspheres is very complex and takes more than 40 hours, and waste liquid is generated and needs to be post-treated. There is thus a need to develop a convenient, green, pollution-free, low-value vanadium oxide preparation method for applying vanadium oxide to lithium/sodium ion batteries.
Vanadium oxide is sensitive to various gases, and Yang et al prepared vanadium oxide flowers micron, which can be used as a sensing material to detect various gases (X.H.Yang,et al,Synthesis of hierarchical nanosheet-assembled V2O5 microflowers with high sensing properties towards amines,RSC Advances 2016,6,87649), such as ethanol, acetone, methanol, formaldehyde and the like, and prove that the vanadium oxide has excellent gas sensing performance. However, the vanadium oxide micro flower is prepared by a complex hydrothermal method, which takes about 30 hours, and waste liquid is generated and needs to be post-treated. There is thus a need to develop a convenient, green, pollution-free, low-value vanadium oxide preparation method for applying vanadium oxide to gas sensors.
Disclosure of Invention
The invention aims to provide a vanadium oxide micron rod cluster, a preparation method and application thereof, wherein the vanadium oxide micron rod cluster is of a quadrangular discrete and vertical space structure, and is expected to show excellent electrochemical performance and very sensitive gas sensing performance when being applied to lithium/sodium ion batteries and gas sensors. The preparation method is beneficial to large-scale industrial production.
To achieve the purpose, the invention adopts the following technical scheme:
the vanadium oxide micron rod cluster consists of a plurality of discrete vanadium oxide micron rods, and the length of each vanadium oxide micron rod is 50-90 microns;
the vanadium oxide micron rod is in a quadrangular prism shape, and the side length of the cross section of the vanadium oxide micron rod is 0.8-2 microns.
Further, the vanadium oxide micron rod cluster is prepared from vanadium pentoxide.
The preparation method of the vanadium oxide micron rod cluster comprises the following steps:
(1) Placing vanadium pentoxide powdery substances into a metal boat;
(2) Electrifying the metal boat in an air environment at room temperature, and heating the vanadium pentoxide powdery substances in the metal boat to 1000-1300 ℃ to enable the vanadium pentoxide powdery substances to be melted into liquid vanadium oxide;
(3) Cutting off the power supply, and cooling and solidifying the liquid vanadium oxide under the natural thermal diffusion condition to form the vanadium oxide micron rod cluster.
Further, in the step (2), the temperature is kept at 1000-1300 ℃ for 2-10 seconds.
Further, the vanadium pentoxide powder material is heated to 1000-1300 ℃ within 5-10 seconds.
Further, in the step (1), the metal boat is a tungsten boat or a molybdenum boat.
Further, in the step (2), the liquid vanadium oxide can be spread over the bottom surface of the metal boat.
An application of a vanadium oxide micron rod cluster, wherein the vanadium oxide micron rod cluster is used as an induction material for preparing a gas sensor;
The vanadium oxide micron rod cluster is applied to the preparation of lithium/sodium ion batteries as an electrode material.
The technical scheme provided by the invention can comprise the following beneficial effects:
The vanadium oxide micron rod cluster is a quadrangular discrete and vertical space structure, and is expected to show excellent electrochemical performance and very sensitive gas sensing performance when being applied to lithium/sodium ion batteries and gas sensors.
The invention adopts a current rapid heating method, uses a metal boat as a heating unit to heat vanadium pentoxide, and generates a large number of unique quadrangular discrete and vertical vanadium oxide micron rod clusters in the cooling process. No waste is generated in the preparation process, the adopted equipment is simple and convenient to operate, and the reaction conditions are mild, the time consumption is short, the control is easy, and the large-scale industrial production is facilitated.
Drawings
FIG. 1 is a low-magnification scanning electron microscope image of a cluster of vanadium oxide nanorods, according to one embodiment of the invention;
FIG. 2 is a high-power scanning electron microscope image of a cluster of vanadium oxide nanorods, according to one embodiment of the invention;
fig. 3 is an X-ray diffraction pattern of a cluster of vanadium oxide nanorods, according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The invention provides a vanadium oxide micron rod cluster, which consists of a plurality of discrete vanadium oxide micron rods, wherein the length of each vanadium oxide micron rod is 50-90 microns; the vanadium oxide micron rod is in a quadrangular prism shape, and the side length of the cross section of the vanadium oxide micron rod is 0.8-2 microns.
The vanadium oxide micron rod cluster can be used as an induction material for preparing a gas sensor and can also be used as an electrode material for preparing a lithium/sodium ion battery. The vanadium oxide micron rod cluster has a unique quadrangular prism-shaped discrete and vertical space structure, and can ensure the sufficient contact between the gas to be detected and the vanadium oxide when being applied to a gas sensor as an induction material, thereby expanding the reaction area of the gas to be detected and the vanadium oxide and improving the sensitivity of the gas sensor; when the electrolyte is used as an electrode material of a lithium/sodium ion battery, the electrolyte can be fully contacted with vanadium oxide, so that the electrochemical reaction resistance is reduced, and the performance of the battery is further improved.
The vanadium oxide micron rod cluster is prepared from vanadium pentoxide, and the vanadium oxide micron rod cluster can be obtained by adopting only one raw material, so that the preparation steps are simple.
Correspondingly, the invention also provides a preparation method of the vanadium oxide micron rod cluster, which comprises the following steps:
(1) Placing vanadium pentoxide powdery substances into a metal boat;
(2) Electrifying the metal boat in an air environment at room temperature, and heating the vanadium pentoxide powdery substances in the metal boat to 1000-1300 ℃ to enable the vanadium pentoxide powdery substances to be melted into liquid vanadium oxide;
(3) Cutting off the power supply, and cooling and solidifying the liquid vanadium oxide under the natural thermal diffusion condition to form the vanadium oxide micron rod cluster.
The preparation method can finish the preparation of the vanadium oxide micron rod cluster only by a metal boat and power supply equipment, the equipment is simple and convenient to operate, and no waste is generated in the preparation process. The vanadium pentoxide powdery substance is heated to 1000-1300 ℃ to ensure complete melting, and is cooled and solidified under the natural thermal diffusion condition in the heating temperature range to obtain the vanadium oxide micron rod cluster. This is because the particular morphology of the vanadium oxide nanorod clusters of the present invention is related to the cooling rate. If the heating temperature is too low, the cooling rate is not high enough, so that the vanadium oxide micron rod clusters are difficult to obtain, and if the heating temperature is too high, the volatilization of the vanadium oxide is serious.
In order to ensure that the vanadium oxide is sufficiently melted, in the step (2), the temperature is kept between 1000 and 1300 ℃ for 2 to 10 seconds. The actual verification shows that when the holding time is long, the vanadium oxide volatilizes seriously, and when the holding time is short, the form of the invention cannot be produced, because the molten vanadium oxide can produce vanadium heptaoxide in an air environment at room temperature, and when the holding time is short, the production amount of vanadium heptaoxide is small, and the vanadium oxide micron rod cluster is difficult to obtain.
Further, the vanadium pentoxide powder is heated to 1000-1300 ℃ within 5-10 seconds, and the rapid heating is beneficial to improving the preparation efficiency.
Further, in the step (1), the metal boat is a tungsten boat or a molybdenum boat, and the two metal boats are more commonly used, so that the equipment cost of the preparation method of the invention is further reduced.
Based on the fact that the bottom surface of the metal boat is a plane, in the step (2), the bottom surface of the metal boat can be fully paved with liquid vanadium oxide to form a liquid vanadium oxide thin layer, and the liquid vanadium oxide has a larger contact area with air, so that the large-scale generation of vanadium oxide micron rod clusters is facilitated.
The invention is further illustrated by the following examples.
Example 1
The preparation method of the vanadium oxide micron rod cluster comprises the following steps:
(1) 100g of industrial vanadium pentoxide powder with the particle size of about 45 micrometers is weighed by a balance and uniformly spread in a tungsten boat with the width of 10mm and the length of 100 mm;
(2) Applying a direct current power supply to two ends of a tungsten boat in an air environment with room temperature, wherein the application process is to gradually increase the current intensity to 19 amperes, and generate Joule heat in the tungsten boat, so that vanadium pentoxide powder is heated to about 1150 ℃ within 5-10 seconds (which is higher than the melting point 678 ℃ of vanadium pentoxide), so that the vanadium pentoxide is melted into liquid vanadium oxide, and the temperature is kept for 5 seconds;
(3) The power supply is cut off, the liquid vanadium oxide is rapidly cooled and solidified due to natural thermal diffusion, and a large number of discrete and vertical quadrangular vanadium oxide micron rod clusters are formed within 2-3 seconds.
The detection of the vanadium oxide micron rod cluster product obtained in the embodiment is carried out: the image of a low power scanning electron microscope is shown in FIG. 1, and it can be seen that the product is a large number of discrete and vertically arranged columns; the image of the high power scanning electron microscope is shown in figure 2, and the column is a quadrangular column with the width of 0.8-2 microns and the length of 50-90 microns; the phase of the prepared product is tested by an X-ray diffractometer, the result is shown in figure 3, the lowest spectrum is a standard X-ray diffraction spectrum of vanadium pentoxide (JCPDS No. 89-0611), the spectrum in the middle is a standard X-ray diffraction spectrum of vanadium heptaoxide (JCPDS No. 71-1591), the topmost spectrum is the X-ray diffraction spectrum of the obtained product, and the main phase of the prepared product is found to be vanadium pentoxide, the secondary phase is vanadium heptaoxide, namely, the vanadium oxide micron rod cluster consists of vanadium pentoxide and vanadium heptaoxide.
Example 2
The preparation method of the vanadium oxide micron rod cluster comprises the following steps:
(1) 100g of industrial vanadium pentoxide powder with the particle size of about 45 micrometers is weighed by a balance and uniformly spread in a tungsten boat with the width of 10mm and the length of 100 mm;
(2) Applying a direct current power supply to two ends of a tungsten boat in an air environment with room temperature, wherein the application process is to gradually increase the current intensity to 22 amperes, and generate Joule heat in the tungsten boat, so that the vanadium pentoxide powder is heated to about 1300 ℃ within 5-10 seconds, so that the vanadium pentoxide is melted into liquid vanadium oxide, and the temperature is kept for 2 seconds;
(3) The power supply is cut off, the liquid vanadium oxide is rapidly cooled and solidified due to natural thermal diffusion, and a large number of discrete and vertical quadrangular vanadium oxide micron rod clusters are formed within 2-3 seconds.
Example 3
The preparation method of the vanadium oxide micron rod cluster comprises the following steps:
(1) 100g of industrial vanadium pentoxide powder with the particle size of about 45 micrometers is weighed by a balance and uniformly spread in a tungsten boat with the width of 10mm and the length of 100 mm;
(2) Applying a direct current power supply to two ends of a tungsten boat in an air environment with room temperature, wherein the application process is to gradually increase the current intensity to 18 amperes, and generate Joule heat in the tungsten boat, so that the vanadium pentoxide powder is heated to about 1100 ℃ within 5-10 seconds, so that the vanadium pentoxide is melted into liquid vanadium oxide, and the temperature is kept for 10 seconds;
(3) The power supply is cut off, the liquid vanadium oxide is rapidly cooled and solidified due to natural thermal diffusion, and a large number of discrete and vertical quadrangular vanadium oxide micron rod clusters are formed within 2-3 seconds.
The low power electron microscope image and the high power electron microscope image of the vanadium oxide micro rod cluster obtained in example 2 and example 3 are similar to example 1. The length of the quadrangular prism of the vanadium oxide micron rod clusters obtained in the example 2 and the example 3 is 50-90 microns, and the side length of the cross section is 0.8-2 microns.
The vanadium oxide micron rod clusters prepared in the embodiment 1, the embodiment 2 and the embodiment 3 can be used for preparing a gas sensor as an induction material and can also be used for preparing a lithium/sodium ion battery as an electrode material.
Other structures, etc. and operations of a vanadium oxide micron rod cluster, a preparation method and application thereof according to an embodiment of the present invention are known to those skilled in the art, and will not be described in detail herein.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The vanadium oxide micron rod cluster is characterized by comprising a plurality of discrete vanadium oxide micron rods, wherein the length of each vanadium oxide micron rod is 50-90 microns;
the vanadium oxide micron rod is in a quadrangular prism shape, and the side length of the cross section of the vanadium oxide micron rod is 0.8-2 microns;
the vanadium oxide micron rod cluster consists of vanadium pentoxide and vanadium heptaoxide.
2. The vanadium oxide nanorod cluster according to claim 1, wherein the vanadium oxide nanorod cluster is prepared from vanadium pentoxide powder.
3. The preparation method of the vanadium oxide micron rod cluster is characterized by comprising the following steps of:
(1) Placing vanadium pentoxide powdery substances into a metal boat;
(2) Electrifying the metal boat in an air environment at room temperature, and heating the vanadium pentoxide powdery substances in the metal boat to 1000-1300 ℃ to enable the vanadium pentoxide powdery substances to be melted into liquid vanadium oxide;
(3) And cutting off the power supply, and cooling and solidifying the liquid vanadium oxide under the natural thermal diffusion condition to form the vanadium oxide micron rod cluster as set forth in claim 1 or 2.
4. The method for preparing a cluster of vanadium oxide micro rods according to claim 3, wherein in the step (2), the temperature is kept at 1000-1300 ℃ for 2-10 seconds.
5. A method of preparing a cluster of vanadium oxide nanorods according to claim 3, wherein the vanadium pentoxide powder material is heated to 1000-1300 ℃ within 5-10 seconds.
6. The method of claim 3, wherein in the step (1), the metal boat is a tungsten boat or a molybdenum boat.
7. The method of claim 3, wherein in the step (2), the bottom surface of the metal boat is fully covered with liquid vanadium oxide.
8. The application of the vanadium oxide micron rod cluster is characterized in that the application of the vanadium oxide micron rod cluster as an induction material in preparing a gas sensor is characterized in that the vanadium oxide micron rod cluster is as follows;
Or the vanadium oxide micron rod cluster as in claim 1 or 2 is used as electrode material in preparing lithium/sodium ion battery.
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