Preparation method of vanadium tetrasulfide@Super P composite powder and application thereof

A composite powder, vanadium tetrasulfide technology, used in chemical instruments and methods, electrochemical generators, chemical/physical processes, etc., can solve the problem that the high performance of VS4 cannot be well exerted, the appearance is irregular and uniform, and the distribution Sparse and other problems, to achieve the effect of simple synthesis path, cheap and easy cost, and low synthesis temperature

Active Publication Date: 2019-06-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the composite materials that have been reported above, a part of VS 4 Not grown on the carbon material surface, only for VS 4 Composite with carbon materials, although the other part grows on the surface of carbon materials, but the distribution is relatively sparse and irregular, and VS 4 The shape is also irregular and uniform
This inadequate and inefficient recombination makes VS 4 The high performance of the

Method used

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  • Preparation method of vanadium tetrasulfide@Super P composite powder and application thereof
  • Preparation method of vanadium tetrasulfide@Super P composite powder and application thereof
  • Preparation method of vanadium tetrasulfide@Super P composite powder and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1: Weigh 50 mg of Super P and add it to 60 ml of deionized water, and ultrasonicate for 2 hours with an ultrasonic power of 400-600 W to obtain uniformly dispersed black solution A.

[0043] Step 2: Weigh 1.0 g of sodium metavanadate and 3.6 g of thioacetamide and add them to solution A at the same time, and stir magnetically for 50 minutes at a speed of 400-600 r / min to obtain solution B.

[0044] Step 3: Pour solution B into the reaction liner and seal it, then install the liner in the outer kettle and fix it, then place it in a homogeneous reactor with a filling ratio of 59%, and then at a speed of 10r / min, Reaction at 180°C for 24h.

[0045] Step 4: After the hydrothermal reaction is completed, the reaction vessel is naturally cooled to room temperature, and then the cooled product after the reaction is taken out, and the product is collected after three times of alternate washing with water and three times of alcohol.

[0046] Step 5: Place the collected prod...

Embodiment 2

[0048] Step 1: Weigh 48mg of Super P and add it to 58ml of deionized water, sonicate for 1.5h with a power of 400W to obtain a uniformly dispersed black solution A;

[0049] Step 2: Weigh 0.9g of sodium metavanadate and 3.5g of thioacetamide and add them to solution A at the same time, stir magnetically for 30min at a speed of 400r / min to obtain solution B;

[0050] Step 3: Pour solution B into the reaction liner and seal it, then install the liner in the outer kettle and fix it, then place it in a homogeneous reactor with a filling ratio of 58%, and then at a speed of 5r / min, React at 175°C for 23h;

[0051] Step 4: After the hydrothermal reaction is completed, the reaction kettle is naturally cooled to room temperature, and then the cooled product after the reaction is taken out, and the product is collected after being alternately washed with water and alcohol twice;

[0052] Step 5: Place the collected product in the cold well of a freeze dryer for freezing, the freezing ...

Embodiment 3

[0054] Step 1: Weigh 52mg of Super P and add it to 62ml of deionized water, sonicate for 2.5h with a power of 600W to obtain uniformly dispersed black solution A;

[0055] Step 2: Weigh 1.1g of sodium metavanadate and 3.7g of thioacetamide and add them to solution A at the same time, stir magnetically for 60min at a speed of 600r / min to obtain solution B;

[0056] Step 3: Pour solution B into the reaction liner and seal it, then install the liner in the outer kettle and fix it, then place it in a homogeneous reactor with a filling ratio of 62%, and then at a speed of 10r / min, React at 185°C for 25h;

[0057] Step 4: After the hydrothermal reaction is completed, the reaction kettle is naturally cooled to room temperature, and then the product cooled after the reaction is taken out, and the product is collected after being washed alternately with water and alcohol for 5 times;

[0058] Step 5: Place the collected product in the cold well of a freeze dryer for freezing, the free...

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Abstract

A preparation method of vanadium tetrasulfide@Super P composite powder comprises the following steps of: weighing 48-52mg of Super P, adding the Super P into 58-62ml deionized water, and performing ultrasonic treatment for 1.5-2.5h to obtain a uniformly dispersed black solution A; weighing 0.9-1.1g of sodium metavanadate and 3.5-3.7g of thioacetamide, and adding the sodium metavanadate and the thioacetamide in the solution A at the same time, and performing magnetic stirring for 30-60min to obtain a solution B; pouring the solution B into a reaction liner, then sealing the reaction liner, arranging the liner into an external kettle for fixing, putting the external kettle in a homogeneous reaction instrument, and performing reaction at a temperature of 175-185 DEG C for 23-25 h in a rotation speed of 5-10 r / min; after the hydrothermal reaction is finished, naturally cooling the reaction kettle to a room temperature, taking out a cooled product after reaction, and collecting the productafter alternate cleaning with water for 2-5 times and alcohol for 2-5 times; putting the collected product into a cold well of a freeze drier for freezing, putting the frozen product into a tray, covering a seal cover, performing vacuum supply of the tray to the air pressure in the tray to be 10-20Pa, and drying the tray for 12-18h to collect the product. The preparation method of vanadium tetrasulfide@Super P composite powder and the application thereof are simple in reaction process, low in temperature and easy to control and do not need large-scale devices and harsh reaction conditions.

Description

technical field [0001] The invention relates to the technical field of vanadium tetrasulfide@Super P composite powder, in particular to a preparation method and application of vanadium tetrasulfide@SuperP composite powder. Background technique [0002] As a typical transition metal sulfide, VS 4 Has a one-dimensional chain structure. Among them, two S 2 2- The group (four S) tightly surrounds V and expands along the c direction to form VS 4 Molecular chain, two adjacent VS 4 The molecular chains are connected by weak van der Waals force, and the distance between the chains can reach (Rout CS, Kim B-H, et al. J Am ChemSoc. 2013, 135:8720-8725.). Similar to FeS 2 , VS 4 It is derived from the natural mineral green sulfur vanadite, and the valence state of S is -1, and the valence state of V is +4. The above structural properties make VS 4 It has been applied in photocatalysis, hydrorefining reaction, lithium ion battery, supercapacitor, aluminum ion battery, magnesi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00B82Y40/00B01J27/198
CPCY02E60/10
Inventor 黄剑锋李文斌冯亮亮曹丽云石泓彬孙震马闯刘代源
Owner SHAANXI UNIV OF SCI & TECH
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