CN113643903B - NF @ Ni-Mo-S @ NiCo-LDH composite material and preparation method and application thereof - Google Patents
NF @ Ni-Mo-S @ NiCo-LDH composite material and preparation method and application thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 266
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 118
- 238000004070 electrodeposition Methods 0.000 claims abstract description 100
- 239000011259 mixed solution Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000001035 drying Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 26
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 239000006260 foam Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000012378 ammonium molybdate tetrahydrate Substances 0.000 claims abstract description 15
- FIXLYHHVMHXSCP-UHFFFAOYSA-H azane;dihydroxy(dioxo)molybdenum;trioxomolybdenum;tetrahydrate Chemical compound N.N.N.N.N.N.O.O.O.O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O FIXLYHHVMHXSCP-UHFFFAOYSA-H 0.000 claims abstract description 15
- 238000000151 deposition Methods 0.000 claims abstract description 6
- 230000008021 deposition Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 22
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 35
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 24
- 238000002604 ultrasonography Methods 0.000 abstract description 11
- 239000002086 nanomaterial Substances 0.000 abstract description 4
- 229910021607 Silver chloride Inorganic materials 0.000 description 30
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 30
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 30
- 238000002484 cyclic voltammetry Methods 0.000 description 22
- 239000008367 deionised water Substances 0.000 description 20
- 229910021641 deionized water Inorganic materials 0.000 description 20
- 238000007599 discharging Methods 0.000 description 12
- 238000010277 constant-current charging Methods 0.000 description 11
- 125000004122 cyclic group Chemical group 0.000 description 10
- 238000000840 electrochemical analysis Methods 0.000 description 10
- 239000008151 electrolyte solution Substances 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052976 metal sulfide Inorganic materials 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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Abstract
The invention relates to an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof. The preparation method comprises the following steps: mixing ammonium molybdate tetrahydrate and Ni (NO) 3 ) 2 ·6H 2 Mixing O, thiourea and water, stirring and uniformly dispersing by ultrasound to completely dissolve the O, thiourea and water to obtain a mixed solution A; the mixed solution A is used as an electrodeposition solution, foam nickel sequentially treated by acetone, ethanol and water is used as a deposition carrier, and a one-step electrodeposition method is adopted, so that NF @ Ni-Mo-S is prepared after washing and drying; mixing Ni (NO) 3 ) 2 ·6H 2 O、Co(NO 3 ) 3 ·6H 2 Adding O into water, fully stirring and uniformly dispersing to obtain a mixed solution B; and (3) taking the mixed solution B as an electrodeposition solution, taking NF @ Ni-Mo-S as a deposition carrier, washing and drying by adopting a one-step electrodeposition method to prepare the NF @ Ni-Mo-S @ NiCo-LDH composite material. The composite material prepared by the invention has a multilayer flaky nano structure, can provide a large number of effective active sites, and thus has excellent electrochemical performance.
Description
Technical Field
The invention belongs to the technical field of electrochemistry and nano materials, and relates to an NF @ Ni-Mo-S @ NiCo-LDH composite material, and a preparation method and application thereof.
Background
At present, the human demand for green and sustainable energy continues to grow rapidly due to the energy scarcity and accelerated environmental distress consequences of natural fossil fuel combustion. Many renewable resources are currently being developed, but the intermittent nature of these resources limits their practical applications. Therefore, the development of economical, sustainable and high performance energy storage devices is crucial to ensure future sustainable energy. Among energy storage devices, supercapacitors are attracting attention for their greater specific power, fast charging and discharging capability, long life and environmental protection, which make supercapacitors applicable in many potential fields, such as hybrid vehicles, portable electronic devices, power grids, etc. Pseudocapacitors (PSCs) are a class of supercapacitors that exhibit rapid multi-electron reversible faradaic redox reactions at the electrode surface, resulting in higher specific capacities compared to Electrochemical Double Layer Capacitors (EDLCs).
Disclosure of Invention
The invention aims to provide an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof.
The effect of enhancing the electrochemical performance is achieved by compounding Ni-Mo-S and NiCo-LDH, so that the problems of application limitation and the like of Ni-Mo-S and NiCo-LDH in the aspect of electrode materials of a supercapacitor are solved.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a preparation method of NF @ Ni-Mo-S @ NiCo-LDH composite material, which comprises the following steps:
s1: mixing ammonium molybdate tetrahydrate and Ni (NO) 3 ) 2 ·6H 2 Mixing O, thiourea and water to completely dissolve the O and the thiourea to obtain a mixed solution A;
s2: the mixed solution A is used as an electrodeposition solution, foamed nickel is used as a deposition carrier, and a one-step electrodeposition method is adopted for washing and drying to prepare NF @ Ni-Mo-S;
s3: mixing Ni (NO) 3 ) 2 ·6H 2 O、Co(NO 3 ) 3 ·6H 2 Adding O into water, fully stirring and uniformly dispersing to obtain a mixed solution B;
s4: and (3) taking the mixed solution B as an electrodeposition solution, taking NF @ Ni-Mo-S as a deposition carrier, washing and drying by adopting a one-step electrodeposition method to prepare the NF @ Ni-Mo-S @ NiCo-LDH composite material.
In one embodiment of the present invention, in step S1, the ammonium molybdate tetrahydrate, ni (NO) 3 ) 2 ·6H 2 The molar weight ratio of O to thiourea is (0.1-0.3) mmol to 2mmol (6-8) mmol.
In one embodiment of the present invention, in step S1, the volume of water is 40-60mL.
In one embodiment of the invention, in the step S1, the mixture is stirred and assisted by ultrasonic dispersion to be uniformly dispersed so as to be completely dissolved, the stirring and assisted by ultrasonic dispersion are carried out at room temperature for 5-10min, and the clear mixed solution a is obtained after ultrasonic dispersion.
In an embodiment of the present invention, in step S2, the nickel foam is prepared by sequentially treating acetone, ethanol, and water.
In one embodiment of the present invention, in step S2, the one-step electrodeposition process is performed at room temperature, the voltage range for electrodeposition is-1.2-0.2V, the scan rate is 10-20mV/S, and the scan period is 10-20.
In bookIn one embodiment of the invention, in step S3, ni (NO) 3 ) 2 ·6H 2 O、Co(NO 3 ) 3 ·6H 2 The molar charge ratio of O is 1mmol (2-4 mmol).
In one embodiment of the present invention, in step S3, the volume of water is 45-55mL.
In one embodiment of the present invention, in step S4, the one-step electrodeposition process is performed at room temperature, the voltage range for electrodeposition is-1.2-0.2V, the scan rate is 5-10mV/S, and the scan period is 3-8.
In one embodiment of the invention, the drying processes in steps S2 and S4 are both vacuum drying, the drying temperature is 60-80 ℃, and the drying time is 12-24h.
The invention also provides an NF @ Ni-Mo-S @ NiCo-LDH composite material obtained based on the preparation method.
The invention also provides application of the NF @ Ni-Mo-S @ NiCo-LDH composite material obtained based on the preparation method in a super capacitor.
In one embodiment of the invention, the application mode of the NF @ Ni-Mo-S @ NiCo-LDH composite material prepared by the method in the working electrode of the supercapacitor is as follows: grinding the NF @ Ni-Mo-S @ NiCo-LDH composite material, uniformly mixing with carbon black and polytetrafluoroethylene, and then pressing on a foam nickel sheet to obtain the working electrode.
In one embodiment of the invention, the mass ratio of the NF @ Ni-Mo-S @ NiCo-LDH composite material to the carbon black to the polytetrafluoroethylene is 8 (0.8-1.2) to 0.8-1.2.
Metal Sulfides (MSs) such as CuS, co 9 S 8 、Ni 3 S 2 、FeS 2 、WS 2 And MoS 2 The metal sulfide serving as a substitute of metal oxide is considered as a novel pseudo-capacitance electrode material in SCs, and has high conductivity, excellent oxidation-reduction reversibility, low electronegativity and high catalytic activity, and the specific capacitance capacity, energy and power density are enhanced. At the same time, additional metal atom Ni is doped to adjust the morphology of the required nano structure so as to obtain high electrochemical performance。
Layered Double Hydroxides (LDHs), due to their novel layered structure, superior capacitance, high redox activity and environmental friendliness, have become competitive materials for supercapacitor applications. Because of the synergistic effect of cobalt and nickel elements, different electrochemical active sites are provided through several oxidation states of the cobalt and nickel elements, and NiCo-LDH has outstanding capacitance characteristics, the NiCo-LDH is selected as a Ni-Mo-S composite material, so that the active sites of the NiCo-LDH are fully utilized.
According to the invention, the effect of enhancing the electrochemical performance is achieved by compounding Ni-Mo-S and NiCo-LDH, and the problems of application limitation and the like of Ni-Mo-S and NiCo-LDH in the aspect of electrode materials of a supercapacitor are further solved.
Compared with the prior art, the invention has the following advantages:
1. the NF @ Ni-Mo-S @ NiCo-LDH composite material prepared by the invention has a unique multilayer flaky nano structure, moS 2 The doped Ni obviously increases the electric active sites and fully utilizes the sulfur vacancies in the sulfide, in addition, the reduction of the ion diffusion length can effectively make up the defect of low conductivity of the NiCo-LDH, and the NiCo-LDH is compounded with the Ni, so that the high specific capacitance of the NiCo-LDH is fully utilized.
2. The NF @ Ni-Mo-S @ NiCo-LDH composite material prepared by the invention is used as a working electrode in a super capacitor, and a cyclic voltammetry curve chart has an obvious redox peak pair and is good in stability; meanwhile, a constant current charging and discharging curve diagram shows that the specific capacitance can reach 2425F/g at least, and an alternating current impedance spectrogram can prove that the conductivity is good and the internal resistance is low.
3. The preparation method has the advantages of low cost of raw materials, no pollution, no toxicity of solvents generated in the preparation process, and realization of large-scale industrial popularization.
Drawings
FIG. 1 is a cyclic voltammogram at different sweep rates for the product samples obtained in example 1.
Figure 2 is a graph of GCD at different current densities for samples of the product obtained in example 1.
FIG. 3 is an EIS plot of a sample of the product obtained in example 1.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The raw materials used in the examples of the present invention are commercially available unless otherwise specified.
Example 1:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, putting the washed foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to prepare NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foamed nickel loaded composite material is used as a working electrode, namely a Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-1).
The Chenghua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method and adopts a three-electrode system for electrochemical test: the foam nickel sheet of NMS @ NC-1 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 3105.9F/g under the condition of 2mol/L KOH solution and 1A/g current density.
FIG. 1 is a CV diagram of the prepared NF @ Ni-Mo-S @ NiCo-LDH composite material under different sweep rates, wherein the sweep rates are respectively 5, 10, 15, 20, 30, 40, 50, 80 and 100mV/s. As can be seen from the figure, at a voltage range of-0.1 to 0.7V, there are a pair of symmetrical redox peaks, and as the sweep rate increases, the oxidation peak and the reduction peak move to the right and left, respectively. The phenomenon shows that the prepared NF @ Ni-Mo-S @ NiCo-LDH composite material has good reversibility and stability.
FIG. 2 is the GCD curve of the prepared NF @ Ni-Mo-S @ NiCo-LDH composite material under the current density of 1, 2, 5, 10, 20A/g.
FIG. 3 is an EIS diagram of the prepared NF @ Ni-Mo-S @ NiCo-LDH composite material under 100000Hz and 0.01 Hz.
Example 2:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.2mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electro-deposition is finished, washing the foamed nickel for three times by using deionized water, putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foam nickel of the load composite material is used as a working electrode, namely Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-2).
The Chenhua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method, and adopts a three-electrode system to perform electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-2 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2975.3F/g in 2mol/L KOH solution and at a current density of 1A/g.
Example 3:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof comprise the following steps:
in the first step, 0.3mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, putting the washed foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to prepare NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, placing the mixed solution B serving as electrodeposition liquid in an electrodeposition device, using NF @ Ni-Mo-S as a working electrode, a platinum wire as a counter electrode and Ag/AgCl as a reference electrode, and maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain the NF @ Ni-Mo-S @ NiCo-LDH. The foamed nickel loaded composite material is used as a working electrode, namely a Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-3).
The Chenghua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method and adopts a three-electrode system for electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-3 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2425F/g in 2mol/L KOH solution and at a current density of 2A/g.
Example 4:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 O, 6mmol of thiourea and 50mL of water are mixed, stirred and uniformly dispersed by ultrasound to be completely dissolved, so as to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, using 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, using a platinum wire as a counter electrode, using Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, putting the washed foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to prepare NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain the NF @ Ni-Mo-S @ NiCo-LDH. The foamed nickel loaded composite material is used as a working electrode, namely a Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-4).
The Chenhua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method, and adopts a three-electrode system to perform electrochemical test: the foam nickel sheet of NMS @ NC-4 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2837.8F/g under the condition of 2mol/L KOH solution and the current density of 1A/g.
Example 5:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 O, 7mmol of thiourea and 50mL of water are mixed, stirred and uniformly dispersed by ultrasound to be completely dissolved, so as to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, using 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, using a platinum wire as a counter electrode, using Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electro-deposition is finished, washing the foamed nickel for three times by using deionized water, putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foam nickel of the load composite material is used as a working electrode, namely Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-5).
The Chenhua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method, and adopts a three-electrode system to perform electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-5 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2639.5F/g in 2mol/L KOH solution and at a current density of 1A/g.
Example 6:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof comprise the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 O, 8mmol of thiourea and 50mL of water are mixed, stirred and uniformly dispersed by ultrasound to be completely dissolved, so as to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 20. Taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, putting the washed foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to prepare NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain the NF @ Ni-Mo-S @ NiCo-LDH. The foam nickel of the load composite material is used as a working electrode, namely Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-6).
The Chenghua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method and adopts a three-electrode system for electrochemical test: the foam nickel sheet of NMS @ NC-6 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2706.9F/g under the condition of 2mol/L KOH solution and the current density of 5A/g.
Example 7:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electro-deposition is finished, washing the foamed nickel for three times by using deionized water, putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、4mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, placing the mixed solution B serving as electrodeposition liquid in an electrodeposition device, using NF @ Ni-Mo-S as a working electrode, a platinum wire as a counter electrode and Ag/AgCl as a reference electrode, and maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain the NF @ Ni-Mo-S @ NiCo-LDH. The foam nickel of the load composite material is used as a working electrode, namely Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-7).
The Chenhua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method, and adopts a three-electrode system to perform electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-7 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2849.8F/g under the condition of 2mol/L KOH solution and the current density of 10A/g.
Example 8:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, using 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, using a platinum wire as a counter electrode, using Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by deionized water, putting the washed foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to prepare NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, and maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 5mV/S, and the scanning period is 5. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foamed nickel loaded composite material is used as a working electrode, namely a Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-8).
The Chenhua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method, and adopts a three-electrode system to perform electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-8 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2631.8F/g in 2mol/L KOH solution and at a current density of 1A/g.
Example 9:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 O, 8mmol of thiourea and 50mL of water are mixed, stirred and uniformly dispersed by ultrasound to be completely dissolved, so as to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, taking 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning speed is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electro-deposition is finished, washing the foamed nickel for three times by using deionized water, putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/S, and the scanning period is 3. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foam nickel of the load composite material is used as a working electrode, namely Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-9).
The Chenghua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method and adopts a three-electrode system for electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-9 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. The specific capacitance of the composite material reaches 2715.2F/g in 2mol/L KOH solution and at a current density of 2A/g.
Example 10:
an NF @ Ni-Mo-S @ NiCo-LDH composite material and a preparation method and application thereof, comprising the following steps:
in the first step, 0.1mmol ammonium molybdate tetrahydrate, 2mmol Ni (NO) 3 ) 2 ·6H 2 Mixing O, 8mmol of thiourea and 50mL of water, stirring and uniformly dispersing by ultrasound to completely dissolve the thiourea to obtain a mixed solution A;
and secondly, placing the mixed solution A as an electrodeposition solution in an electrodeposition device, using 8mm multiplied by 1cm foamed nickel which is treated by acetone, ethanol and water for 3 times in sequence as a working electrode, using a platinum wire as a counter electrode, using Ag/AgCl as a reference electrode, maintaining the electrodeposition solution at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/s, and the scanning period is 10. Taking out the foamed nickel after the electro-deposition is finished, washing the foamed nickel for three times by using deionized water, putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S;
thirdly, 1mmol of Ni (NO) 3 ) 2 ·6H 2 O、2mmol Co(NO 3 ) 3 ·6H 2 Adding O into 50mL of water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
and fourthly, taking the mixed solution B as electrodeposition liquid, placing the mixed solution B in an electrodeposition device, taking NF @ Ni-Mo-S as a working electrode, taking a platinum wire as a counter electrode, taking Ag/AgCl as a reference electrode, maintaining the electrodeposition liquid at room temperature, wherein the scanning voltage range is-1.2-0.2V, the scanning rate is 10mV/S, and the scanning period is 5. And (3) taking out the foamed nickel after the electrodeposition is finished, washing the foamed nickel for three times by using deionized water, then putting the foamed nickel into a vacuum oven, and drying the foamed nickel for 12 hours at the temperature of 60 ℃ to obtain NF @ Ni-Mo-S @ NiCo-LDH. The foamed nickel loaded composite material is used as a working electrode, namely a Ni-Mo-S @ NiCo-LDH working electrode (note NMS @ NC-10).
The Chenghua CHI760e electrochemical workstation adopts a cyclic voltammetry and constant current charging and discharging method and adopts a three-electrode system for electrochemical test: the method is characterized in that a foam nickel sheet of NMS @ NC-10 is used as a working electrode, an Ag/AgCl electrode is used as a reference electrode, a Pt electrode is used as a counter electrode, and 2mol/L KOH is used as an electrolyte solution. The specific capacitance and the cyclic stability of the composite material are detected, and cyclic voltammetry tests show that the composite material has excellent redox capability. Under the condition of 2mol/L KOH solution and the current density of 1A/g, the specific capacitance of the composite material reaches 2619F/g.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A preparation method of NF @ Ni-Mo-S @ NiCo-LDH composite material is characterized by comprising the following steps:
s1: mixing ammonium molybdate tetrahydrate and Ni (NO) 3 ) 2 ·6H 2 Mixing O, thiourea and water to completely dissolve the O and the thiourea to obtain a mixed solution A;
s2: the mixed solution A is used as electrodeposition liquid, foam nickel is used as a deposition carrier, and the NF @ Ni-Mo-S is prepared by adopting a one-step electrodeposition method, washing and drying;
s3: mixing Ni (NO) 3 ) 2 ·6H 2 O、Co(NO 3 ) 3 ·6H 2 Adding O into water, and fully stirring and uniformly dispersing to obtain a mixed solution B;
s4: and (2) taking the mixed solution B as electrodeposition liquid, taking NF @ Ni-Mo-S as a deposition carrier, washing and drying by adopting a one-step electrodeposition method to prepare the NF @ Ni-Mo-S @ NiCo-LDH composite material.
2. The method for preparing NF @ Ni-Mo-S @ NiCo-LDH composite material as claimed in claim 1, wherein in step S1, ammonium molybdate tetrahydrate, ni (NO) 3 ) 2 ·6H 2 The molar weight ratio of O to thiourea is (0.1-0.3) mmol to 2mmol (6-8) mmol.
3. The preparation method of the NF @ Ni-Mo-S @ NiCo-LDH composite material according to claim 1, characterized in that in step S1, stirring and ultrasonic dispersion are assisted to be uniform so as to enable the NF @ Ni-Mo-S @ NiCo-LDH composite material to be completely dissolved, the stirring and ultrasonic dispersion are assisted to be room temperature, the ultrasonic time is 5-10min, and a clear mixed solution A is obtained after ultrasonic dispersion.
4. The method for preparing NF @ Ni-Mo-S @ NiCo-LDH composite material as claimed in claim 1, wherein in step S3, ni (NO) is added 3 ) 2 ·6H 2 O、Co(NO 3 ) 3 ·6H 2 The molar charge ratio of O is 1mmol (2-4 mmol).
5. The method for preparing NF @ Ni-Mo-S @ NiCo-LDH composite material according to claim 1, wherein in step S2, the one-step electrodeposition process is performed at room temperature, the voltage range used for electrodeposition is-1.2-0.2V, the scanning rate is 10-20mV/S, and the scanning period is 10-20;
in step S4, the one-step electrodeposition process is carried out at room temperature, the voltage range used for electrodeposition is-1.2-0.2V, the scanning rate is 5-10mV/S, and the scanning period is 3-8.
6. The preparation method of the NF @ Ni-Mo-S @ NiCo-LDH composite material according to claim 1, wherein the drying processes in the steps S2 and S4 are vacuum drying, the drying temperature is 60-80 ℃, and the drying time is 12-24h.
7. An NF @ Ni-Mo-S @ NiCo-LDH composite material, characterized in that, the NF @ Ni-Mo-S @ NiCo-LDH composite material is obtained by the preparation method of any one of claims 1 to 6.
8. The use of the NF @ Ni-Mo-S @ NiCo-LDH composite material of claim 7 in a supercapacitor.
9. The application of the NF @ Ni-Mo-S @ NiCo-LDH composite material in the supercapacitor is characterized in that the NF @ Ni-Mo-S @ NiCo-LDH composite material is ground, uniformly mixed with carbon black and polytetrafluoroethylene, and then pressed on a foam nickel sheet to obtain the supercapacitor working electrode.
10. The application of the NF @ Ni-Mo-S @ NiCo-LDH composite material in the supercapacitor according to claim 9, wherein the mass ratio of the NF @ Ni-Mo-S @ NiCo-LDH composite material to the carbon black to the polytetrafluoroethylene is 8 (0.8-1.2) to (0.8-1.2).
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