CN112018359A - NiTe2/MXene composite material and preparation method and application thereof - Google Patents

NiTe2/MXene composite material and preparation method and application thereof Download PDF

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CN112018359A
CN112018359A CN202010830461.7A CN202010830461A CN112018359A CN 112018359 A CN112018359 A CN 112018359A CN 202010830461 A CN202010830461 A CN 202010830461A CN 112018359 A CN112018359 A CN 112018359A
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composite material
mxene
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张业龙
徐晓丹
周健文
孙宏阳
刘争
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Wuyi University
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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
    • B82Y40/00—Manufacture or treatment of nanostructures
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention discloses a NiTe2The preparation method of the/MXene composite material comprises the following steps: (1) adding MXene into a dispersing agent to prepare a dispersion liquid with the concentration of 1-100 mg/ml; (2) mixing a nickel source material and a tellurium source material according to the ratio of 1: adding the mixture into the dispersion liquid according to the molar ratio of 1-4 to obtain a mixed liquid; (3) heating the mixed solution to 220 ℃ for 100 ℃ and preserving heat for 10-24h, cooling, centrifuging, washing and drying to obtain NiTe2the/MXene composite material. With pure NiTe2Compared with the material, the NiTe prepared by the invention2/MXene composite materialThe material uses MXene as a 3D substrate and NiTe2Loading on MXene, and preparing NiTe2the/MXene composite material is applied to the negative electrode of the potassium ion battery and shows higher reversible specific capacity, good cycling stability and excellent electrochemical performance.

Description

NiTe2/MXene composite material and preparation method and application thereof
Technical Field
The invention belongs toThe technical field of nano materials, in particular to a NiTe2A/MXene composite material and a preparation method and application thereof.
Background
In recent years, with the wide use of electronic products and new energy automobiles, lithium ion batteries have a leading position in the field of energy storage, but with the wide use of lithium ion batteries, the lithium resources have worried about due to the problems of limited storage capacity, high cost, uneven distribution and the like. In view of the above, it has become a research hotspot for people to find a novel secondary alkali metal battery with abundant resources and low cost.
The potassium has the advantages of rich resources, low price, wide sources and the like, and in an electrochemical system, the potassium has lower electrode potential and higher ionic conductivity, so that the potassium ion battery is considered as an ideal energy storage system in the future. However, due to the radius of potassium ions
Figure BDA0002637759960000011
Far greater than lithium ion
Figure BDA0002637759960000012
The electrode material can generate huge volume expansion in the potassium intercalation/deintercalation process, which causes the structural damage of the electrode material, thereby resulting in poor electrochemical performance and being difficult to meet the requirements of practical application. Therefore, research on the anode material with excellent potassium storage performance has great application value.
MXene materials as a new type of two-dimensional transition metal carbon/nitride or carbonitride, MXene, a layered material containing hydroxyl, oxygen and fluorine functional groups and having a high specific surface area, is prepared by HF etching MAX phase and removing A atoms in MAX phase. The MXene material has a high specific surface area, is beneficial to full infiltration between an electrode and electrolyte, shows more active sites and is beneficial to improvement of reaction kinetics, and the MXene has a variable interlayer spacing and can effectively relieve volume expansion in a circulation process, so that the material has a huge application prospect in the field of energy storage. However, the interlayer spacing is small, and the surface functional group has certain adsorbability, so that the single use cannot achieve the ideal fast ion migration effect.
NiTe2As a transition metal compound, the compound has the advantages of high specific capacity, low cost, wide resources and the like, and has great application value in the field of energy storage. However, due to pure NiTe2A large volume expansion occurs during the circulation process, resulting in pulverization and exfoliation of the electrode material, resulting in poor electrochemical performance.
Disclosure of Invention
In view of the problems of the prior art, it is an object of the present invention to provide a NiTe2the/MXene composite material. Another object of the present invention is to provide the NiTe2A preparation method of/MXene composite material. Further, the invention provides a NiTe2Application of/MXene composite material and NiTe prepared by using the same2the/MXene composite material is applied to the negative electrode of the potassium ion battery.
The invention adopts the following technical scheme:
NiTe2The preparation method of the/MXene composite material belongs to a solvothermal method and comprises the following steps:
(1) adding MXene into dispersant, stirring for 1-5h (such as 1h, 2h, 3h, 4h and 5 h) to obtain 1-100mg/ml dispersion, preferably 10-90mg/ml, more preferably 20-80mg/ml, and more preferably 40-60 mg/ml;
(2) mixing a nickel source material and a tellurium source material according to the ratio of 1: 1 to 4, preferably 1: 1 to 3, for example 1: 1,1: 2,1: 3,1: 4, adding the mixture into the dispersion liquid obtained in the step (1), and stirring for 5-15h, such as 5h, 8h, 10h, 12h and 15h to obtain a mixed liquid;
(3) transferring the mixed solution into a reaction kettle, placing the reaction kettle into an oven, heating to 100-220 ℃, for example, 100 ℃, 120 ℃, 150 ℃, 220 ℃, reacting for 10-24h, for example, 10h, 14h, 16h, 20h and 24h, then naturally cooling to room temperature, centrifuging, completely cleaning with a cleaning agent, placing the obtained product into a vacuum drying oven for drying to obtain NiTe2the/MXene composite material.
Further, the nickel source material is NiCl2·6H2O、NiSO4·6H2O、NiC10H14O4One or more of (a).
Further, the tellurium source material is one or more of biphenyl ditelluride, sodium tellurite and tellurium powder.
Further, the tellurium source material has a particle size of 80-120 meshes, for example 100 meshes.
Further, MXene is Ti3C2Tx、Ti2CTx、V3C2Tx、V3N2Tx、Mo3N2TxAt least one of (1), e.g. Ti3N2Tx，V3C2Tx，V3N2TxThe mass ratio is 1-4: 1 of Ti3C2TxAnd V3C2TxThe mass ratio is 1-4: 1: 1 of Ti3C2Tx、V3N2TxAnd V3C2Tx；TxIs a surface functional group-O, -F or-OH.
Further, the dispersant is at least one of N, N-dimethylformamide and ethanol.
Further, the cleaning agent is at least one of water and ethanol; preferably, the washing is performed thoroughly with deionized water and anhydrous ethanol, and the washing may be performed alternately 2 to 14 times, preferably 3 to 10 times, with deionized water and anhydrous ethanol.
Further, the NiTe2NiTe in/MXene composite material2The loading amount is 20 to 150 wt%, for example 20 to 60 wt%, 50 to 100 wt%, 70 to 120 wt%, 100 to 150 wt%.
Further, the dispersion liquid in the step (3) is transferred to a reaction kettle and put into an oven, and the temperature is raised to 220 ℃, preferably 130 ℃, 180 ℃, for example 140 ℃, 150 ℃, 160 ℃, 170 ℃ for reaction for 10-24h, preferably 12-18h, for example 12h, 13h, 14h, 15h, 16h, 17h, 18 h.
Further, the rotation speed used in the centrifugation in the step (4) is 4000-7000r/min, preferably 6000r/min, and the centrifugation is 4-10min, preferably 7 min.
Further, the temperature of vacuum drying in step (5) is 50-80 ℃, preferably 60 ℃, and the drying time is 9-15h, preferably 12h, such as 9h, 10h, 12h, 14h, 15 h; the vacuum degree is not more than 133Pa, and 133Pa, 125Pa, 115Pa, 105Pa, 100Pa and 90Pa can be selected.
Further, the NiTe2the/MXene composite material is of a sheet structure, NiTe2The particle size is 10-100 nm.
A potassium ion battery cathode, which comprises NiTe prepared by the preparation method2the/MXene composite material.
A potassium ion battery includes the above battery negative electrode.
The invention has the beneficial effects that:
(1) with pure NiTe2Material ratio, NiTe prepared by the invention2the/MXene composite material, MXene as 3D substrate, can effectively relieve NiTe2Volume expansion during cycling and improvement of NiTe2The phenomena of pulverization and falling off in the charge-discharge cycle process.
(2) Compared with the material without loading MXene, the MXene of the invention is loaded with NiTe2The space between MXene material layers can be further increased, full infiltration of electrode materials and electrolyte is facilitated, ion diffusion is facilitated, the conductivity is improved, active sites are increased, and therefore excellent potassium storage performance is achieved;
(3) the material of the invention has simple preparation method and low cost, and is suitable for large-scale preparation and application.
Drawings
FIG. 1 is a NiTe solution obtained in example 22Scanning electron microscope images of the/MXene composite material;
FIG. 2 shows NiTe in example 22Cycle performance diagram measured by/MXene composite material
FIG. 3 is a graph of NiTe alone in comparative example 12A measured cycle performance profile of the material;
fig. 4 is a graph of the cycle performance measured for the MXene material alone of comparative example 2.
Detailed Description
For better explanation of the present invention, the following specific examples are further illustrated, but the present invention is not limited to the specific examples.
Wherein the materials are commercially available unless otherwise specified.
Wherein the materials are commercially available unless otherwise specified;
the Ti3C2TxNanoparticles were purchased from beijing beike science and technology ltd, code BK2020011814, sheet stacking thickness: 1-5 μm, purity: 99%, product application field: energy storage, catalysis, analytical chemistry, and the like.
The V is2CTxNanoparticles were purchased from beijing beike science and technology ltd, No. BK2020061756, sheet stacking thickness: 1-5 μm, purity: 99%, product application field: energy storage, catalysis, adsorption, biology, sensors, etc.
Unless otherwise specified, all are conventional methods.
The invention provides a NiTe2Method for producing/MXene composite materials, wherein NiTe2See:
"Leiyeyuyi, hydrothermal synthesis, modification and characteristic research of various transition metal telluride nanostructures [ D ]. university in Shaanxi, 2018 ].
Example 1
NiTe2The preparation method of the/MXene composite material comprises the following steps:
(1) 0.1mmol of MXene (Ti) was taken3C2Tx) Adding into ethanol, magnetically stirring for 1 hr to obtain 1mg/ml dispersion;
(2) 0.1mmol of NiCl2·6H2Adding O and 0.2mmol of sodium tellurite into the dispersion liquid obtained in the step (1), and stirring for 5 hours to obtain a mixed liquid;
(3) transferring the mixed solution into a reaction kettle with the capacity of 100ml, sealing, placing the reaction kettle in an oven, heating to 100 ℃, preserving heat for 10 hours, and then cooling to room temperature;
(4) centrifuging the product obtained in the step (3) by a centrifuge under the condition of 4000r/minRemoving supernatant after 4 minutes, washing filter residue for 3 times by using deionized water and absolute ethyl alcohol alternately, drying in a vacuum drying oven at 60 ℃ for 9 hours, and collecting to obtain NiTe2the/MXene composite material.
Mixing NiTe2The mass ratio of the/MXene composite material to the polyvinylidene fluoride and the carbon black is 8: 1: 1, adding a proper amount of N-methyl pyrrolidone, stirring to form uniform slurry, coating the uniform slurry on a current collector, and preparing the potassium ion battery negative plate after vacuum drying and slicing.
NiTe prepared in this example2The reversible specific capacity of the/MXene composite material is 321mAh/g after 100 cycles of circulation under the current density of 100mA/g, and the material is pure NiTe23.26 times of (98.6mAh/g), and NiTe in the present example2the/MXene composite material has higher coulombic efficiency and excellent cycle stability.
Example 2
NiTe2The preparation method of the/MXene composite material comprises the following steps:
(1) 0.2mmol of MXene (Ti) was taken3C2Tx) Adding into ethanol, magnetically stirring for 3 hr to obtain 50mg/ml dispersion;
(2) 0.2mmol of NiCl2·6H2Adding O and 0.25mmol of sodium tellurite into the dispersion liquid obtained in the step (1), and stirring for 10 hours to obtain a mixed liquid;
(3) transferring the mixed solution into a reaction kettle with the capacity of 50ml, sealing, placing the reaction kettle in an oven, heating to 150 ℃, preserving heat for 16 hours, and then cooling to room temperature;
(4) centrifuging the product obtained in the step (3) for 7 minutes at 6000r/min by using a centrifugal machine, discarding the supernatant, alternately washing the filter residue for 3 times by using deionized water and absolute ethyl alcohol, drying in a vacuum drying oven at the drying temperature of 60 ℃ for 12 hours, and collecting to obtain NiTe2the/MXene composite material.
Mixing NiTe2The mass ratio of the/MXene composite material to the polyvinylidene fluoride and the carbon black is 8: 1: 1, adding a proper amount of N-methyl pyrrolidone, stirring to form uniform slurry, and coating the uniform slurry on the flow collection layerAnd (3) carrying out vacuum drying and slicing on the substrate to prepare the potassium ion battery negative plate.
NiTe prepared in this example2The reversible capacity of the/MXene composite material is 430.6mAh/g after 100 cycles of circulation under the current density of 100mA/g, and the material is pure NiTe24.37 times of (98.6mAh/g), and NiTe in the present example2the/MXene composite material has higher coulombic efficiency and excellent cycle stability.
Example 3
NiTe2The preparation method of the/MXene composite material comprises the following steps:
(1) 0.3mmol of MXene (Ti) was taken3C2Tx) Adding into ethanol, magnetically stirring for 5 hr to obtain 100mg/ml dispersion;
(2) 0.3mmol of NiCl2·6H2Adding O and 0.7mmol sodium tellurite into the dispersion liquid obtained in the step (1), and stirring for 15 hours to obtain a mixed liquid;
(3) transferring the mixed solution into a reaction kettle with the capacity of 50ml, sealing, placing in an oven, heating to 220 ℃, preserving heat for 24 hours, and then cooling to room temperature;
(4) centrifuging the product obtained in the step (3) for 10 minutes under the condition of 7000r/min by using a centrifuge, discarding the supernatant, alternately washing the filter residue for 3 times by using deionized water and absolute ethyl alcohol, drying in a vacuum drying oven at the drying temperature of 60 ℃ for 15 hours, and collecting to obtain NiTe2the/MXene composite material.
Mixing NiTe2The mass ratio of the/MXene composite material to the polyvinylidene fluoride and the carbon black is 8: 1: 1, adding a proper amount of N-methyl pyrrolidone, stirring to form uniform slurry, coating the uniform slurry on a current collector, and preparing the potassium ion battery negative plate after vacuum drying and slicing.
NiTe prepared in this example2The reversible capacity of the/MXene composite material is 381.5mAh/g after 100 cycles of circulation under the current density of 100mA/g, and the material is pure NiTe23.87 times of (98.6mAh/g), and NiTe in the present example2the/MXene composite material has higher coulombic efficiency and excellent cycle stability.
Example 4
NiTe2The preparation method of the/MXene composite material comprises the following steps:
(1) 0.5mmol of MXene (V) was taken2CTx) Adding into ethanol, magnetically stirring for 3 hr to obtain 50mg/ml dispersion;
(2) 0.5mmol of NiCl2·6H2Adding O and 1.23mmol sodium tellurite into the dispersion liquid obtained in the step (1), and stirring for 10 hours to obtain a mixed liquid;
(3) transferring the mixed solution into a reaction kettle with the capacity of 50ml, sealing, placing in an oven, heating to 130 ℃, preserving heat for 12 hours, and then cooling to room temperature;
(4) and (4) centrifuging the product obtained in the step (3) for 7 minutes by using a centrifuge at 6000r/min, discarding the supernatant, alternately washing the filter residue for 3 times by using deionized water and absolute ethyl alcohol, and drying in a vacuum drying oven at the drying temperature of 60 ℃ for 12 hours to obtain the NiTe2/MXene composite material.
Mixing NiTe2The mass ratio of the/MXene composite material to the polyvinylidene fluoride and the carbon black is 8: 1: 1, adding a proper amount of N-methyl pyrrolidone, stirring to form uniform slurry, coating the uniform slurry on a current collector, and preparing the potassium ion battery negative plate after vacuum drying and slicing.
NiTe prepared in this example2The reversible capacity of the/MXene composite material is 396.9mAh/g after 100 cycles of circulation under the current density of 100mA/g, and the material is pure NiTe24.02 times (98.6mAh/g), and NiTe in the present example2the/MXene composite material has higher coulombic efficiency and excellent cycle stability.
Example 5
NiTe2The preparation method of the/MXene composite material comprises the following steps:
(1) 0.3mmol of MXene (V) was taken2CTx) Adding into ethanol, magnetically stirring for 3 hr to obtain 50mg/ml dispersion;
(2) adding 0.3mmol of NiSO4·6H2Adding O and 0.75mmol of biphenylditellurium into the dispersion liquid in the step (1), stirring for 10 hours,obtaining a mixed solution;
(3) transferring the mixed solution into a reaction kettle with the capacity of 50ml, sealing, placing the reaction kettle in an oven, heating to 160 ℃, preserving heat for 18 hours, and then cooling to room temperature;
(4) and (4) centrifuging the product obtained in the step (3) for 5 minutes by using a centrifuge at 6000r/min, discarding the supernatant, alternately washing the filter residue for 3 times by using deionized water and absolute ethyl alcohol, and drying in a vacuum drying oven at the drying temperature of 60 ℃ for 10 hours to obtain the NiTe2/MXene composite material.
Mixing NiTe2The mass ratio of the/MXene composite material to the polyvinylidene fluoride and the carbon black is 8: 1: 1, adding a proper amount of N-methyl pyrrolidone, stirring to form uniform slurry, coating the uniform slurry on a current collector, and preparing the potassium ion battery negative plate after vacuum drying and slicing.
NiTe prepared in this example2The reversible capacity of the/MXene composite material is 407.2mAh/g after 100 cycles of circulation under the current density of 100mA/g, and the material is pure NiTe24.13 times of (98.6mAh/g), and NiTe in the present example2the/MXene composite material has higher coulombic efficiency and excellent cycle stability.
Comparative example 1:
pure NiTe2The preparation method of the material comprises the following steps:
(1) 0.4mol of NiCl2·6H2Adding O and 1.2mol of sodium tellurite into ethanol to prepare 50mg/ml dispersion, and stirring for 10 hours;
(2) transferring the dispersion liquid obtained in the step (1) into a reaction kettle with the capacity of 50ml, sealing, placing in an oven, heating to 150 ℃, preserving heat for 16h, and then cooling to room temperature;
(3) washing the product obtained in the step (2) with deionized water and absolute ethyl alcohol for 3 times respectively, and centrifuging for 7 minutes by a centrifuge under the condition of 6000 r/min;
(4) and (4) drying the centrifugal product obtained in the step (3) in a vacuum drying oven at the drying temperature of 60 ℃ for 12 hours.
Pure NiTe2The material, polyvinylidene fluoride and carbon black are mixed according to the mass ratio of 8: 1: ratio of 1Mixing, adding a proper amount of N-methyl pyrrolidone, stirring to form slurry, coating the slurry on a current collector, and preparing the potassium ion battery negative pole piece after vacuum drying and slicing.
NiTe prepared in this comparative example2The material has a reversible specific capacity of 98.6mAh/g after 100-circle circulation under the current density of 100mA/g
Comparative example 2
Weighing 80mg of MXene material, 10mg of super P and 10mg of polyvinylidene fluoride binder, mixing, adding a small amount of N-methylpyrrolidone, stirring, coating on a copper foil, drying at 90 ℃ for 3 hours, cutting the copper foil into a round shape by using a slicing machine to serve as a working electrode, drying, putting the round shape into an inert atmosphere glove box with oxygen and water contents lower than 0.4ppm, and assembling into a 2032 type button battery by using a metal potassium sheet as a counter electrode and glass fiber as a diaphragm.
Subjecting each group of materials to specific surface area, NiTe2The test method for the load capacity and the specific capacity after 100 cycles comprises the following steps:
BET specific surface area method for measuring specific surface area, NiTe2The specific capacity after 100 cycles is shown in each specific example. See table 1 for the results of the performance tests of each group.
Table 1: performance testing
Figure BDA0002637759960000071
As can be seen from Table 1, compared to pure NiTe2Or MXene material, NiTe2The specific surface area and specific capacity of the/MXene composite material are greatly increased.
As can be seen from FIG. 1, NiTe obtained by the preparation method of the present invention2NiTe in/MXene composite material2The cathode material grows on MXene material uniformly without agglomeration.
As can be seen from FIGS. 2-4, pure NiTe2The material cycle stability is very poor due to pure NiTe2The huge volume expansion can be generated in the circulation process, which leads to the pulverization and the removal of the electrode materialDropping; the simple MXene specific capacity is very low, because the interlayer spacing is small and the surface functional group has certain adsorbability, the ideal quick ion migration effect cannot be achieved when the single MXene is used alone; and NiTe2The loaded MXene has high specific capacity while maintaining excellent cycling stability, and completely meets the requirement of the potassium ion battery on the negative electrode material, because the MXene is used as a 3D substrate, the NiTe can be effectively relieved2Volume expansion during cycling and improvement of NiTe2Crushing and falling-off phenomena in the charge-discharge cycle process, and simultaneously, the loaded NiTe2The space between MXene material layers can be further increased, full infiltration of electrode materials and electrolyte is facilitated, ion diffusion is facilitated, conductivity is improved, active sites are increased, and therefore excellent potassium storage performance is achieved.
The above description is only exemplary of the present invention and is not intended to limit the scope of the present invention, which is defined by the claims appended hereto, as well as the appended claims.

Claims (10)

1. NiTe2The preparation method of the/MXene composite material is characterized by comprising the following steps:
(1) adding MXene material into dispersant to prepare dispersion liquid with concentration of 1-100 mg/ml;
(2) mixing a nickel source material and a tellurium source material in a ratio of 1: adding the mixture into the dispersion liquid according to the molar ratio of 1-4, and stirring for 5-15 hours to obtain a mixed liquid;
(3) heating the mixed solution to 220 ℃ for reaction for 10-24h, cooling, centrifuging, washing and drying to obtain NiTe2the/MXene composite material.
2. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the MXene is Ti3C2Tx、Ti2CTx、V3C2Tx、V3N2Tx、Mo3N2TxOne or more of (a).
3. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the nickel source material is NiCl2·6H2O、NiSO4·6H2O、NiC10H14O4One or more of (a).
4. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the tellurium source material is one or more of biphenyl ditelluride, sodium tellurite and tellurium powder.
5. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the dispersing agent is one or more of N, N-dimethylformamide and ethanol.
6. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the rotation speed of the centrifugation in the step (3) is 4000-7000r/min, and the time is 4-10 min.
7. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the drying in the step (3) is vacuum drying, the temperature is 50-80 ℃, the time is 9-15h, and the vacuum degree is not more than 133 Pa.
8. NiTe according to claim 12The preparation method of the/MXene composite material is characterized in that the NiTe is2NiTe in/MXene composite material2The loading is 20-150 wt%, and preferably, the NiTe2the/MXene composite material is of a sheet structure, NiTe2Is 10-100 nm.
9. A potassium ion battery negative electrode, characterized in that it comprises NiTe produced by the production method according to any one of claims 1 to 82the/MXene composite material.
10. A potassium ion battery comprising the battery negative electrode of claim 9.
CN202010830461.7A 2020-08-18 2020-08-18 NiTe2/MXene composite material and preparation method and application thereof Withdrawn CN112018359A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107123800A (en) * 2017-05-20 2017-09-01 西南大学 Ti3C2@SnSx（x=1、2）The preparation method of negative material
CN108172801A (en) * 2017-12-28 2018-06-15 哈尔滨工业大学深圳研究生院 A kind of method of porous carbon materials doping vario-property and application
CN108321387A (en) * 2017-12-26 2018-07-24 深圳先进技术研究院 Telluro material is used as application of the negative electrode active material in sodium base Dual-ion cell, sodium tellurium Dual-ion cell and preparation method thereof
CN110270353A (en) * 2019-04-16 2019-09-24 青岛科技大学 The preparation and application of load transitions bimetallic chalcogen compound nano material in situ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107123800A (en) * 2017-05-20 2017-09-01 西南大学 Ti3C2@SnSx（x=1、2）The preparation method of negative material
CN108321387A (en) * 2017-12-26 2018-07-24 深圳先进技术研究院 Telluro material is used as application of the negative electrode active material in sodium base Dual-ion cell, sodium tellurium Dual-ion cell and preparation method thereof
CN108172801A (en) * 2017-12-28 2018-06-15 哈尔滨工业大学深圳研究生院 A kind of method of porous carbon materials doping vario-property and application
CN110270353A (en) * 2019-04-16 2019-09-24 青岛科技大学 The preparation and application of load transitions bimetallic chalcogen compound nano material in situ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DIANDING SUN 等: "NiTe2/N-doped graphitic carbon nanosheets derived from Ni-hexamine coordination frameworks for Na-ion storage", 《CHEMICAL ENGINEERING JOURNAL》 *

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