Carbon nanotube confinement sulfur-selenium composite material and preparation method thereof
A technology of carbon nanotubes and composite materials, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as complex process control conditions, complicated product removal procedures, and unfavorable industrial production. Achieve the effects of weak shuttle effect, high discharge specific capacity, and excellent chemical lithium storage performance
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Embodiment 1
[0036] The preparation method of the carbon nanotube-confined sulfur-selenium composite material in this embodiment comprises the following steps:
[0037] (1) Weigh 2.2445 g of sublimed sulfur and 2.3688 g of elemental selenium and grind for 1 h, then place in a ball mill jar and mill for 6 h at a speed of 300 r / min, then put the mixed powder into a glass tube and vacuum seal, place in The tube furnace was heated from room temperature to 155 °C at a rate of 2 °C / min and kept for 5 h, and then continued to heat up to 260 °C at the same rate for 10 h, and naturally cooled to obtain a reddish-brown sulfur-selenium solid solution;
[0038] (2) Weigh 1 g of carbon nanotubes and 3 g of solid potassium hydroxide, grind them into a uniformly mixed powder in an agate mortar, and put them in a corundum ark; / min flow rate through 120 min high-purity N 2 , to expel the air in spite of it; then adjust N 2The flow rate was 100 mL / min, and the temperature was raised from room temperature...
Embodiment 2
[0046] The preparation method of the carbon nanotube-confined sulfur-selenium composite material in this embodiment comprises the following steps:
[0047] (1) Weigh 1.60325 g of sublimed sulfur and 2.3688 g of elemental selenium and grind for 1 h, then place in a ball mill jar and mill at a speed of 300 r / min for 5 h, then put the mixed powder into a glass tube, vacuum seal it, and place it in The tube furnace was heated from room temperature to 155 °C at a rate of 2 °C / min and kept for 5 h, and then continued to heat up to 260 °C at the same rate for 10 h, and naturally cooled to obtain a reddish-brown sulfur-selenium solid solution;
[0048] (2) Weigh 1 g of carbon nanotubes and 3 g of solid potassium hydroxide, grind them into a uniformly mixed powder in an agate mortar, and put them in a corundum ark; transfer the ark to a tube furnace, first with Flow rate of 40 mL / min through 120 min high-purity N 2 , to expel the air in spite of it; then adjust N 2 The flow rate was ...
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