A kind of cobalt ditelluride/carbon nanofiber material and its preparation method and application
A carbon nanofiber and cobalt telluride technology, applied in the field of cobalt ditelluride/carbon nanofiber materials and their preparation, can solve the problems of poor electrical conductivity and poor cycle stability, and achieve high electrical conductivity, long cycle life, and improved transmission. The effect of efficiency
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Embodiment 1
[0039] (1) Dissolve 2mmol of cobalt sulfate in 10g of dimethylformamide, stir magnetically until completely dissolved, add 0.7g of PAN and 0.2PS, and stir at 30°C for 6h to obtain a spinning solution;
[0040] (2) After inhaling the spinning solution into a medical syringe, apply a high voltage of 12 kV, select a spinning needle with an inner diameter of 0.7 mm, control the internal temperature of the spinning device to 25-30 °C, and adjust the appropriate injection speed and receiving distance for electrospinning. And collect the spinning product, put the spinning product into a blast drying oven and dry for 4 hours to obtain a precursor;
[0041] (3) Take out the precursor and add the tellurium powder to make the mass ratio of the precursor and the tellurium powder 1:1.5, and put the Ar / H 2 (volume ratio of 99:1) gas in a tube furnace, raising the temperature to 450 °C for 4 h at a heating rate of 3 °C / min, and naturally cooling to obtain cobalt ditelluride / carbon nanofiber ...
Embodiment 2
[0045] (1) Dissolve 3 mmol of cobalt acetate in 10.5 g of dimethylformamide, stir magnetically until completely dissolved, add 0.8 g of PVP and 0.8 g of PS, and stir at 35°C for 8 hours to obtain a spinning solution;
[0046] (2) After the above-mentioned spinning solution is sucked into the medical syringe, a high voltage of 14 kV is applied, a spinning needle with an inner diameter of 0.8 mm is selected, and the internal temperature of the spinning device is controlled at 30 to 35 ° C, and the appropriate injection speed and receiving distance are adjusted to carry out electrospinning. silk and collect the spinning product, put the spinning product into a blast drying oven and dry for 6h to obtain a precursor;
[0047] (3) Take out the precursor and add the tellurium powder to make the mass ratio of the precursor and the tellurium powder 1:2. 2(volume ratio of 98:2) gas in a tube furnace, raising the temperature to 500°C for 5h at a heating rate of 4°C / min, and then naturall...
Embodiment 3
[0052] (1) Dissolve 3.5 mmol of cobalt chloride in 10.5 g of dimethylformamide, stir magnetically until completely dissolved, add 0.8 g of PVP and 0.2 g of PMMA, and stir at 40 °C for 10 h to obtain a spinning solution; (2) After the spinning solution was sucked into a medical syringe, a high voltage of 16 kV was applied, a spinning needle with an inner diameter of 0.9 mm was selected, the internal temperature of the spinning device was controlled at 30-35 °C, and the appropriate injection speed and receiving distance were adjusted to perform electrospinning and collect spinning. silk product, put the spinning product into a blast drying oven and dry for 8h to obtain a precursor;
[0053] (3) Take out the precursor and add the tellurium powder to make the mass ratio of the precursor and the tellurium powder 1:2.5, and put the Ar / H 2 (volume ratio of 97:3) gas in a tube furnace, raising the temperature to 550°C for 6h at a heating rate of 5°C / min, and naturally cooling to obtai...
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