A phosphate-modified porous titanium dioxide and its application in sodium-ion batteries
A porous titanium dioxide, titanium dioxide technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of low ion diffusivity, limited development space, low electronic conductivity, etc., achieve excellent performance, reduce intercalation energy barriers, electronic The effect of improving electrical conductivity
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Embodiment 1
[0018] Stir and mix 1 g of titanyl sulfate and 20 ml of ethanol, pour it into a reaction kettle filled with 40 ml of 15mol / L NaOH solution, and add 1 g of NaHCO 3 After reacting at 150°C for 2 days, the white product was collected by centrifugation and washing, and then annealed at 320°C for 2 hours to obtain porous amorphous TiO 2 . Using a tube-type electric furnace, put 500 mg of sodium hypophosphite monohydrate on the upper port of the quartz tube, and put 50 mg of amorphous TiO 2 Put it on the lower port of the quartz tube, first pass argon gas for 20-30 min to exclude oxygen, and then under the argon flow (about 2-4 bubbles per second) at 2°C·min -1 The temperature was raised to 480°C at a constant rate, and then cooled to room temperature naturally after constant temperature for 1 hour to obtain phosphorylated anatase titanium dioxide.
[0019] figure 1 It is a sample comparison chart of pure titanium dioxide (a) and the prepared phosphate-modified porous titanium di...
Embodiment 2
[0024] Stir and mix 1 g of titanyl sulfate and 22 ml of ethanol, pour it into a reaction kettle filled with 43 ml of 15mol / L NaOH solution, and add 1 g of NaHCO 3 After reacting at 160°C for 2 days, the white product was collected by centrifugation and washing, and then annealed at 360°C for 3 hours to obtain porous amorphous TiO 2 . Using a tube-type electric furnace, put 600 mg of sodium hypophosphite monohydrate on the upper port of the quartz tube, and put 50 mg of amorphous TiO 2 Put it on the lower port of the quartz tube, first pass argon gas for 20-30 min to exclude oxygen, and then under the argon flow (about 2-4 bubbles per second) at 3°C·min -1 The temperature was raised to 420°C at a constant temperature for 3 hours, and then naturally cooled to room temperature to obtain phosphorylated anatase titanium dioxide.
Embodiment 3
[0026] Stir and mix 2 g of titanyl sulfate and 25 ml of ethanol, pour it into a reaction kettle with 45 ml of 15 mol / L NaOH solution, and add 2 g of NaHCO 3 After reacting at 180°C for 2 days, the white product was collected by centrifugation and washing, and then annealed at 380°C for 1 hour to obtain porous amorphous TiO 2 . Using a tube-type electric furnace, put 825 mg of sodium hypophosphite monohydrate on the upper port of the quartz tube, and put 55 mg of amorphous TiO 2 Put it on the lower port of the quartz tube, first pass argon gas for 20-30 min to exclude oxygen, and then under the argon flow (about 2-4 bubbles per second) at 5°C·min -1 The temperature was raised to 450°C at a constant temperature for 2 hours, and then naturally cooled to room temperature to obtain phosphorylated anatase titanium dioxide.
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