CN112813536A - One-dimensional antimony phosphate nanofiber material and preparation method and application thereof - Google Patents
One-dimensional antimony phosphate nanofiber material and preparation method and application thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
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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
- 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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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- H—ELECTRICITY
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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
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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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
- H01M4/58—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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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- 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 belongs to the technical field of new energy materials, and discloses a one-dimensional antimony phosphate nanofiber material and a preparation method and application thereof. The one-dimensional antimony phosphate nanofiber is prepared by adding an organic solution of antimony salt into an organic solution of polyvinylpyrrolidone and stirring to obtain a mixed solution; then dropping the aqueous solution of phosphate into the mixed solution and stirring to obtain a spinning solution; then sucking the spinning solution into an injector, and performing electrostatic spinning by adopting aluminum foil for receiving, wherein the voltage is 10-20 kV, the injection speed of the injector is 0.5-1.5 mL/h, and the receiving distance is 10-20 cm to obtain a target product precursor; and finally, putting the target precursor into a blast drying oven for drying, putting the dried target precursor into a muffle furnace, heating to 300-500 ℃, calcining, and naturally cooling to obtain the catalyst. The nanofiber has high specific capacity, excellent cycle performance and good rate performance.
Description
Technical Field
The invention belongs to the technical field of new energy materials, and particularly relates to one-dimensional antimony phosphate (SbPO)4) Nanofiber materials, and methods of making and using the same.
Background
Currently, lithium ion batteries have been widely used as key energy storage devices for portable electronic products. With the rapid development of society and science and technology, the commercial lithium ion battery using graphite as a negative electrode material cannot meet the development requirements of novel 3C products, new energy electric vehicles and the like in terms of specific capacity and energy density. Meanwhile, the application of lithium ion batteries in large-scale energy storage devices is limited by the current situation that lithium resources are rare in content and uneven in distribution in the earth crust. Compared with a lithium ion battery, the sodium ion battery is similar to a lithium ion battery in the aspects of the composition and the principle of the battery, and the sodium resource has rich reserves in the nature and relatively low extraction cost, so that the sodium ion battery is more suitable for being applied to large-scale energy storage equipment. However, the radius of sodium ions (0.102nm) is larger than that of lithium ions (0.076nm), and the negative electrode material of lithium ion batteries such as graphite is not directly suitable for the sodium ion batteries. Therefore, the research on the high-performance sodium ion battery negative electrode material has great significance for promoting the commercialization process of the sodium ion battery.
The molecular formula of the antimony phosphate is SbPO4The molecular weight is 216.77, and the crystal belongs to a monoclinic system and has a stable layered structure. There have been some studies in the field of batteries, in which stabilized PO4 3-The anion can play a role in buffering volume expansion in the charge-discharge cycle process, and Na generated in the discharge process3PO4Is a fast ion conductor and can promote the reaction kinetics. However, antimony phosphate materials have inherently poor electrical conductivity and tend to expand in volume during charge and discharge cycles. The research shows thatThe problems can be effectively solved by carrying out nano-structure design or carbon coating on the antimony phosphate material.
Chinese patent application No. 201910424184.7 discloses a preparation method of a hair ball shaped antimony phosphate and successfully applied to a lithium ion battery cathode material, which comprises the step of carrying out hydrothermal reaction on a trivalent antimony salt solution and a compound containing pyrophosphate to prepare a hair ball shaped antimony phosphate polyanion composite material. The obtained antimony phosphate is used as a lithium ion battery cathode material, and the cycle performance is good. The Chinese patent application with the application number of 201910844945.4 discloses a preparation method and application of nano acicular antimony phosphate, wherein a soluble antimony salt dispersion liquid and a soluble compound dispersion liquid containing pyrophosphate are subjected to solvothermal reaction to obtain a nano acicular antimony phosphate material. The obtained nanometer needle-shaped antimony phosphate sample is used as a lithium ion battery cathode material, after activation under the current density of 0.1C, constant-current charge-discharge is carried out for 1000 cycles under the current density of 1C, the specific capacity is kept at about 257mAh/g, and the cycle performance is good. Chinese patent application No. 201810687557.5 discloses an SbPO4A synthetic method of/rGO material is applied to a sodium ion battery, glycol is used as a solvent, antimony trichloride and ammonium dihydrogen phosphate are added under a certain condition, and SbPO is prepared by combining a solvothermal method and calcination4(rGO). The obtained SbPO4the/rGO is used as a sodium ion battery cathode material, after activation under the current density of 0.1A/g, the capacity is basically kept unchanged after 1000 circles of constant-current charge-discharge circulation under the current density of 1A/g, and the circulation performance is good. In conclusion, the existing research of antimony phosphate in the cathode material of the sodium-ion battery is insufficient, the antimony phosphate is synthesized by a hydrothermal method, the process of the method is variable, and the size and the shape are difficult to control. In order to synthesize the high-performance sodium ion cathode material antimony phosphate, the one-dimensional antimony phosphate nanofiber is prepared by combining an electrostatic spinning method and a heat treatment process and is used as the sodium ion cathode material, so that excellent electrochemical performance is obtained.
Disclosure of Invention
In order to solve the problems of volume expansion and performance attenuation of antimony phosphate in the repeated alloying/dealloying process in the prior art. The primary object of the invention isProviding an antimony phosphate (SbPO)4) A nanofiber material.
The invention also aims to provide a preparation method of the antimony phosphate nanofiber material. The method adopts the electrostatic spinning method combined with the heat treatment process to prepare the one-dimensional antimony phosphate nanofiber, can simply and effectively prepare the one-dimensional antimony phosphate nanofiber material, and the nanofibers are mutually communicated, so that the transmission efficiency of electrons and ions is improved, and the advantage of taking antimony phosphate as a sodium ion electrode material can be exerted to the maximum extent. Meanwhile, the method can be used for preparing a large amount of sodium ion battery cathode materials with controllable shapes and sizes.
The invention further aims to provide application of the antimony phosphate nanofiber material.
The purpose of the invention is realized by the following technical scheme:
a one-dimensional antimony phosphate nanofiber is prepared by adding an organic solution of antimonate into an organic solution of polyvinylpyrrolidone and stirring to obtain a mixed solution; then dropping the aqueous solution of phosphate into the mixed solution and stirring to obtain a spinning solution; then sucking the spinning solution into an injector, and performing electrostatic spinning by adopting aluminum foil for receiving, wherein the voltage is 10-20 kV, the injection speed of the injector is 0.5-1.5 mL/h, and the receiving distance is 10-20 cm to obtain a target product precursor; and finally, putting the target precursor into a blast drying oven for drying, putting the dried target precursor into a muffle furnace, heating to 300-500 ℃, calcining, and naturally cooling to obtain the catalyst.
Preferably, the organic solvent in the organic solution of antimony salt is one or more of ethanol, isopropanol, acetone, dimethylformamide, acetonitrile, pyridine or phenol; the antimony salt is one or more of antimony acetate, antimony trifluoride, antimony trichloride, antimony pentachloride, antimony sulfate, sodium antimony gluconate, antimony nitrate, antimony bromide, antimony sulfide or antimony potassium tartrate hydrate.
Preferably, the polyvinylpyrrolidone in the organic solution of polyvinylpyrrolidone is one or more of K30, K90 or K130; the organic solvent in the organic solution of the polyvinylpyrrolidone is dimethylformamide, ethanol or acetone; the mass fraction of the organic solution of the polyvinylpyrrolidone is 7-20%.
Preferably, the phosphate in the aqueous solution of phosphate is one or more of phosphoric acid, trimetaphosphoric acid, potassium pyrophosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, or dipotassium hydrogen phosphate.
Preferably, the concentration of the organic solution of the antimony salt is 1-5 mmol/L; the concentration of the phosphate aqueous solution is 1-5 mmol/L; the molar ratio of the antimony salt in the organic antimony salt solution to the phosphate in the phosphate aqueous solution is 1: (1-1.2).
Preferably, the diameter of the one-dimensional antimony phosphate nanofiber is 100-200 nm.
The preparation method of the one-dimensional antimony phosphate nanofiber comprises the following specific steps:
s1, adding an organic solution of antimony salt into an organic solution of polyvinylpyrrolidone, and stirring to obtain a mixed solution;
s2, dropping a phosphate water solution into the mixed solution, and stirring to obtain a spinning solution;
s3, sucking the spinning solution into an injector, receiving the spinning solution by adopting an aluminum foil, wherein the voltage is 10-20 kV, the injection speed of the injector is 0.5-1.5 mL/h, and the receiving distance is 10-20 cm, and performing electrostatic spinning to obtain a target product precursor;
and S4, putting the target precursor into a blast drying oven for drying, putting the dried target precursor into a muffle furnace, heating to 300-500 ℃, calcining, and naturally cooling to obtain the one-dimensional antimony phosphate nanofiber.
Preferably, the stirring time in the step S2 is 6-48 h.
Preferably, the drying time in the step S4 is 6-48 h; the heating rate is 1-10 ℃/min, and the heat preservation time is 1-5 h.
The one-dimensional antimony phosphate nanofiber is applied to the field of sodium ion battery cathode materials.
The present invention uses a mixed solution of an organic solvent and water as a reaction solvent. Firstly, a proper amount of polyvinylpyrrolidone (PVP) is weighed and dissolved in an organic solventMeanwhile, a certain amount of soluble antimony salt is weighed and dissolved in an organic solvent, and a certain amount of soluble phosphate is weighed and dissolved in water. Secondly, the solution dissolved with antimony salt is slowly added into the organic solvent dissolved with PVP, and then the aqueous solution dissolved with phosphate is slowly added into the solution. And then stirring the mixed solution into a spinning solution, and performing electrostatic spinning to obtain the precursor fiber. Putting the precursor into a muffle furnace, heating to a certain temperature at a certain speed, preserving the temperature for a period of time, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber (SbPO)4) A material.
Compared with the prior art, the invention has the following beneficial effects:
1. the method adopts a simple, efficient and high-repeatability experimental scheme, and can prepare the one-dimensional nano fibrous antimony phosphate electrode material with uniform diameter. The unique one-dimensional nanofiber structure is beneficial to shortening the transmission path of sodium ions, and the one-dimensional nanofiber material has high specific capacity, excellent cycle performance and good rate performance. The specific discharge capacity is 300mAh/g after discharging for 100 circles under the current density of 0.5A/g, and the specific discharge capacity is 126.1mAh/g after discharging for 300 circles under the current density of 1A/g. In a rate capability test, the discharging specific capacity is 241.8mAh/g at a current density of 5A/g.
2. The preparation method can prepare the one-dimensional antimony phosphate nanofiber material (with the diameter of 100-200 nm) with uniform appearance and controllable diameter by adjusting the conditions of electrostatic spinning and heat treatment.
3. The antimony salt and the phosphate used in the invention have wide sources and low prices, the required product is prepared by combining electrostatic spinning with subsequent heat treatment, the heat treatment is carried out in the air atmosphere, the requirement on equipment is not high, the method is simple, efficient, good in repeatability and low in operation cost, and the mass production can be realized.
4. The method has the advantages of rich experimental raw materials, simple experiment, good repeatability and low cost, and the formed one-dimensional antimony phosphate nano-fiber has uniform size and is easy to regulate and control.
Drawings
FIG. 1 is an X-ray diffraction pattern of one-dimensional antimony phosphate nanofibers obtained in example 1;
FIG. 2 is a SEM image of the one-dimensional antimony phosphate nanofibers obtained in example 1;
FIG. 3 is a transmission electron micrograph of one-dimensional antimony phosphate nanofibers obtained in example 2;
FIG. 4 is a graph of the charge-discharge cycle performance of the one-dimensional antimony phosphate nanofibers obtained in example 2 at a current density of 0.5A/g.
FIG. 5 is a graph of the charge-discharge cycle performance of the one-dimensional antimony phosphate nanofibers obtained in example 2 at a current density of 1A/g.
FIG. 6 is a graph of rate capability of one-dimensional antimony phosphate nanofibers obtained in example 2.
Detailed Description
The following examples are presented to further illustrate the present invention and should not be construed as limiting the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Example 1
1. 1g of PVPK30 was dissolved in 9g of dimethylformamide to prepare a 10% PVP solution.
2. 1.5mmol of antimony acetate was dissolved in 1g of dimethylformamide solution and slowly added to the PVP solution.
3. Dissolving 1.5mmol of diammonium hydrogen phosphate in 1g of water solution, slowly adding the solution into the solution, and stirring for 2 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying high voltage of 10kV, carrying out electrostatic spinning under the conditions that the injection speed is adjusted to be 0.03ml/min and the receiving distance is 10cm, collecting spinning products, and drying in a forced air drying oven for 6 hours to obtain precursors.
5. And (3) putting the precursor into a muffle furnace, heating to 400 ℃ at a heating rate of 1 ℃/min in the air atmosphere, preserving the temperature for 2h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
FIG. 1 is an X-ray diffraction pattern of one-dimensional antimony phosphate nanofibers obtained in example 1; as can be seen from FIG. 1, the XRD peak positions of the obtained target products were consistent with those of the standard PDF card (PDF #35-0829), demonstrating that the prepared samples were pure antimony phosphate with no other impurity phases. FIG. 2 is a SEM image of the one-dimensional antimony phosphate nanofibers obtained in example 1; as can be seen from FIG. 2, the one-dimensional antimony phosphate nanofibers had an average diameter of 150nm and all exhibited a one-dimensional fibrous shape.
Example 2
1. 1g of PVPK90 was dissolved in 9g of dimethylformamide to prepare a 10% PVP solution.
2. 2mmol of antimony nitrate was dissolved in 2g of dimethylformamide solution and slowly added to the PVP solution.
3. 2mmol of ammonium dihydrogen phosphate is dissolved in 2g of water solution and slowly added into the solution, and the solution is stirred for 4 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying high voltage of 12kV, carrying out electrostatic spinning under the conditions that the injection speed is adjusted to be 0.035ml/min and the receiving distance is 11cm, collecting spinning products, and drying the spinning products in a forced air drying box for 8 hours to obtain precursors.
5. And (3) putting the precursor into a muffle furnace, heating to 450 ℃ at the heating rate of 2 ℃/min in the air atmosphere, preserving the temperature for 2h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
FIG. 3 is a transmission electron micrograph of one-dimensional antimony phosphate nanofibers obtained in example 2; as can be seen from FIG. 3, the average diameter of the sample is about 150nm, and the antimony phosphate is uniformly distributed in the one-dimensional nanofibers. The one-dimensional antimony phosphate nanofiber obtained in the example is used as a negative electrode material of a sodium ion battery. FIG. 4 is a graph of the charge-discharge cycle performance of the one-dimensional antimony phosphate nanofibers obtained in example 2 at a current density of 0.5A/g. As can be seen from FIG. 4, the specific discharge capacity after 100 discharge cycles at a current density of 0.5A/g is 300mAh/g, and FIG. 5 is a graph of the charge-discharge cycle performance of the one-dimensional antimony phosphate nanofibers obtained in example 2 at a current density of 1A/g. As can be seen from FIG. 5, the specific discharge capacity after 300 discharge cycles at a current density of 1A/g was 126.1 mAh/g. FIG. 6 is a graph of rate capability of the one-dimensional antimony phosphate nanofibers obtained in example 2, and it can be seen from FIG. 6 that the specific discharge capacity can reach 241.8mAh/g at a current density of 5A/g. The one-dimensional antimony phosphate nanofiber shows good cycle performance and rate performance.
Example 3
1. 1.5g of PVPK90 was dissolved in 12.5g of dimethylformamide to prepare a 12% PVP solution by mass fraction.
2. 2.5mmol of antimony trichloride was dissolved in 2.5g of dimethylformamide solution and slowly added to the PVP solution.
3. 2.5mmol of sodium dihydrogen phosphate was dissolved in 2.5g of an aqueous solution, and slowly added to the above solution, followed by stirring for 6 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying a high voltage of 15kV, carrying out electrostatic spinning under the conditions that the injection speed is adjusted to be 0.04ml/min and the receiving distance is 12cm, collecting a spinning product, and drying the spinning product in a forced air drying box for 8 hours to obtain a precursor.
5. And (3) putting the precursor into a muffle furnace, heating to 500 ℃ at a heating rate of 3 ℃/min in the air atmosphere, preserving the temperature for 2h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
Example 4
1. 1g of PVPK130 is dissolved in 9g of dimethylformamide to prepare a PVP solution with the mass fraction of 10%.
2. 3mmol of antimony potassium tartrate hydrate was dissolved in 3g of dimethylformamide solution and slowly added to the PVP solution.
3. 3mmol of ammonium dihydrogen phosphate is dissolved in 3g of water solution and slowly added into the solution, and the solution is stirred for 8 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying a high voltage of 15kV, carrying out electrostatic spinning under the conditions that the injection speed is adjusted to be 0.045ml/min and the receiving distance is 15cm, collecting a spinning product, and drying the spinning product in a forced air drying box for 8 hours to obtain a precursor.
5. And (3) putting the precursor into a muffle furnace, heating to 450 ℃ at the heating rate of 2 ℃/min in the air atmosphere, preserving the temperature for 2h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
Example 5
1. 1.5g of PVPK130 is dissolved in 12.5g of dimethylformamide to prepare a PVP solution with the mass fraction of 12%.
2. 3.5mmol of antimony sulfate was dissolved in 3.5g of dimethylformamide solution and slowly added to the PVP solution.
3. 3.5mmol of phosphoric acid was dissolved in 3.5g of the aqueous solution, and slowly added to the above solution, followed by stirring for 10 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying 18kV high voltage, performing electrostatic spinning under the conditions that the injection speed is adjusted to be 0.045ml/min and the receiving distance is 15cm, collecting spinning products, and drying the spinning products in a forced air drying box for 12 hours to obtain a precursor.
5. And (3) putting the precursor into a muffle furnace, heating to 300 ℃ at a heating rate of 3 ℃/min in the air atmosphere, preserving the temperature for 3h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
Example 6
1.2 g of PVPK130 is dissolved in 11.3g of dimethylformamide to prepare a PVP solution with the mass fraction of 15%.
2. 4mmol of antimony bromide was dissolved in 4g of dimethylformamide solution and slowly added to the PVP solution.
3. 4mmol of trimetaphosphoric acid was dissolved in 4g of an aqueous solution, and slowly added to the solution, followed by stirring for 15 hours to obtain a spinning solution.
4. And (3) sucking the spinning solution into an injector, applying a high voltage of 20kV, carrying out electrostatic spinning under the conditions that the injection speed is adjusted to be 0.05ml/min and the receiving distance is 18cm, collecting a spinning product, and drying the spinning product in a forced air drying oven for 10 hours to obtain a precursor.
5. And (3) putting the precursor into a muffle furnace, heating to 300 ℃ at a heating rate of 5 ℃/min in the air atmosphere, preserving the temperature for 3h, and naturally cooling to room temperature to obtain the one-dimensional antimony phosphate nanofiber.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A one-dimensional antimony phosphate nanofiber is characterized in that the one-dimensional antimony phosphate nanofiber is prepared by adding an organic solution of antimonate into an organic solution of polyvinylpyrrolidone and stirring to obtain a mixed solution; then dropping the aqueous solution of phosphate into the mixed solution and stirring to obtain a spinning solution; then sucking the spinning solution into an injector, and performing electrostatic spinning by adopting aluminum foil for receiving, wherein the voltage is 10-20 kV, the injection speed of the injector is 0.5-1.5 mL/h, and the receiving distance is 10-20 cm to obtain a target product precursor; and finally, putting the target precursor into a blast drying oven for drying, putting the dried target precursor into a muffle furnace, heating to 300-500 ℃, calcining, and naturally cooling to obtain the catalyst.
2. The one-dimensional antimony phosphate nanofiber according to claim 1, wherein the organic solvent in the organic solution of antimony salt is one or more of ethanol, isopropanol, acetone, dimethylformamide, acetonitrile, pyridine or phenol; the antimony salt is one or more of antimony acetate, antimony trifluoride, antimony trichloride, antimony pentachloride, antimony sulfate, sodium antimony gluconate, antimony nitrate, antimony bromide, antimony sulfide or antimony potassium tartrate hydrate.
3. The one-dimensional antimony phosphate nanofiber according to claim 1, wherein the polyvinylpyrrolidone in the organic solution of polyvinylpyrrolidone is one or more of K30, K90, or K130; the organic solvent in the organic solution of the polyvinylpyrrolidone is dimethylformamide, ethanol or acetone; the mass fraction of the organic solution of the polyvinylpyrrolidone is 7-20%.
4. The one-dimensional antimony phosphate nanofiber according to claim 1, wherein the phosphate in the aqueous solution of phosphate is one or more of phosphoric acid, trimetaphosphoric acid, potassium pyrophosphate, monoammonium phosphate, diammonium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihydrogen phosphate, or dipotassium hydrogen phosphate.
5. The one-dimensional antimony phosphate nanofiber according to claim 1, wherein the concentration of the organic solution of antimony salt is 1-5 mmol/L; the concentration of the phosphate aqueous solution is 1-5 mmol/L; the molar ratio of the antimony salt in the organic antimony salt solution to the phosphate in the phosphate aqueous solution is 1: (1-1.2).
6. The one-dimensional antimony phosphate nanofiber according to claim 1, wherein the diameter of the one-dimensional antimony phosphate nanofiber is 100-200 nm.
7. The preparation method of one-dimensional antimony phosphate nanofibers according to any one of claims 1-6, comprising the specific steps of:
s1, adding an organic solution of antimony salt into an organic solution of polyvinylpyrrolidone, and stirring to obtain a mixed solution;
s2, dropping a phosphate water solution into the mixed solution, and stirring to obtain a spinning solution;
s3, sucking the spinning solution into an injector, receiving the spinning solution by adopting an aluminum foil, wherein the voltage is 10-20 kV, the injection speed of the injector is 0.5-1.5 mL/h, and the receiving distance is 10-20 cm, and performing electrostatic spinning to obtain a target product precursor;
and S4, putting the target precursor into a blast drying oven for drying, putting the dried target precursor into a muffle furnace, heating to 300-500 ℃, calcining, and naturally cooling to obtain the one-dimensional antimony phosphate nanofiber.
8. The method for preparing one-dimensional antimony phosphate nanofibers according to claim 7, wherein the stirring time in step S2 is 6-48 hours.
9. The method for preparing one-dimensional antimony phosphate nanofibers according to claim 7, wherein the drying time in step S4 is 6-48 hours; the heating rate is 1-10 ℃/min, and the heat preservation time is 1-5 h.
10. The use of the one-dimensional antimony phosphate nanofibers of any one of claims 1-6 in the field of sodium ion battery negative electrode materials.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114927668A (en) * | 2022-06-13 | 2022-08-19 | 海城申合科技有限公司 | Preparation method of nitrogen-doped antimony phosphate/carbon composite material for negative electrode of sodium ion battery |
| CN115612892A (en) * | 2022-10-11 | 2023-01-17 | 信阳师范学院 | Method for preparing silicon-antimony alloy nanotube |
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| KR20120060156A (en) * | 2010-12-01 | 2012-06-11 | 한양대학교 산학협력단 | Preparation of thermoelectric nanotube |
| CN104201359A (en) * | 2014-08-22 | 2014-12-10 | 华中科技大学 | Carbon-coated nano-antimony composite material as well as preparation method and application thereof |
| CN110611087A (en) * | 2019-07-18 | 2019-12-24 | 山东大学 | Composite material with antimony or bismuth uniformly distributed in titanium-based compound and preparation method and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120060156A (en) * | 2010-12-01 | 2012-06-11 | 한양대학교 산학협력단 | Preparation of thermoelectric nanotube |
| CN104201359A (en) * | 2014-08-22 | 2014-12-10 | 华中科技大学 | Carbon-coated nano-antimony composite material as well as preparation method and application thereof |
| CN110611087A (en) * | 2019-07-18 | 2019-12-24 | 山东大学 | Composite material with antimony or bismuth uniformly distributed in titanium-based compound and preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114927668A (en) * | 2022-06-13 | 2022-08-19 | 海城申合科技有限公司 | Preparation method of nitrogen-doped antimony phosphate/carbon composite material for negative electrode of sodium ion battery |
| CN114927668B (en) * | 2022-06-13 | 2024-03-26 | 海城申合科技有限公司 | Preparation method of nitrogen-doped antimony phosphate/carbon composite material for negative electrode of sodium ion battery |
| CN115612892A (en) * | 2022-10-11 | 2023-01-17 | 信阳师范学院 | Method for preparing silicon-antimony alloy nanotube |
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