Confined synthesis method for tungsten disulfide@C composite electrode material
A tungsten disulfide, composite electrode technology, applied in nanotechnology for materials and surface science, battery electrodes, secondary batteries, etc., can solve the problem of strict temperature and time requirements, large product influence, and difficulty in controlling morphology and other problems, to achieve the effects of low price, good product dispersion, and easy control of process parameters
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Embodiment 1
[0031] Step 1: At room temperature, add 0.618g of sodium tungstate dihydrate to 25mL of deionized water and stir until it is completely dissolved to form solution A, the stirring speed is 600r / min, and the stirring time is 0.1h;
[0032] Step 2: Add 0.168g of glucose to solution A, add 0.0168g of PVP, stir until all glucose and PVP are dissolved, and control the molar ratio of tungsten source and carbon source to 1:0.5. The stirring speed is 500r / min, and the stirring time is 30min;
[0033] Step 3: Dilute concentrated hydrochloric acid into 2mol / L transparent solution B, add solution B dropwise to solution A until the pH value of the solution is 1.3, transfer the solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction, and react The temperature is 180°C, the reaction time is 12h, and after the reaction, it is naturally cooled to room temperature;
[0034] Step 4: Open the reactor, take out the product, wash it with absolute ethanol and deionized water and centr...
Embodiment 2
[0037] Step 1: At room temperature, add 1.28g of sodium tungstate dihydrate to 25mL of deionized water and stir until completely dissolved to form solution A, the stirring speed is 600r / min, and the stirring time is 0.1h;
[0038] Step 2: Add 0.349g glucose to solution A, add 0.0349g PVP, stir until all glucose and PVP are dissolved, and control the molar ratio of tungsten source and carbon source to 1:0.5. The stirring speed is 500r / min, and the stirring time is 30min;
[0039] Step 3: Dilute concentrated hydrochloric acid into 4mol / L transparent solution B, add solution B dropwise to solution A until the pH of the solution is about 1.7, transfer the solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction, The reaction temperature is 150°C, and the reaction time is 24h. After the reaction, it is naturally cooled to room temperature.
[0040] Step 4: Open the reaction kettle, take out the product, wash it with absolute ethanol and deionized water and centrifuge ...
Embodiment 3
[0043] Step 1: At room temperature, add 0.825g of sodium tungstate dihydrate to 25mL of deionized water and stir until it is completely dissolved to form solution A, the stirring speed is 600r / min, and the stirring time is 1h;
[0044] Step 2: Add 0.225g glucose to solution A, add 0.0225g PVP, stir until all glucose and PVP are dissolved, and control the molar ratio of tungsten source to carbon source to 1:0.5. The stirring speed is 500r / min, and the stirring time is 30min;
[0045] Step 3: Dilute concentrated hydrochloric acid into 2mol / L transparent solution B, add solution B dropwise to solution A until the pH of the solution is 1.5, transfer the solution to a 100mL polytetrafluoroethylene reactor for homogeneous reaction, and react The temperature was 180°C, the reaction time was 12h, and the reaction was cooled to room temperature naturally.
[0046] Step 4: Open the reaction kettle, take out the product, wash it with absolute ethanol and deionized water and centrifuge it, repe...
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