Method for preparing carbon-coated core-shell structure nanometer alloy material of cathode for lithium-ion battery
A lithium-ion battery, core-shell structure technology, applied in the direction of battery electrodes, structural parts, circuits, etc., can solve problems such as the inability to synthesize alloy particles, and achieve good electrical conductivity, low technical cost, and simple process
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Embodiment 1
[0029] Nano-SnO prepared by hydrothermal method 2 And nano CuO as raw material. Weigh 1.5g nanometer SnO 2 , CuO (molar ratio 5:6) powder, dispersed in a certain amount of toluene solution, adding 0.5ml of hexadecyltrimethoxysilane solution, high-power ultrasonic dispersion for 1h, then filtered, washed several times with ethanol, and Put the black powder into a vacuum drying oven at 80°C for 8 hours to obtain hydrophobized SnO 2 , CuO particles. Add the hydrophobized oxide particles to a mixed solution of 100ml water and 100ml formaldehyde, add 0.08g cetyltrimethylammonium bromide (CTAB), and ultrasonically disperse for 30min. Then add 0.5g resorcinol in the mixed solution, pass into N 2 Gas for 20 minutes to remove oxygen, add anhydrous sodium carbonate 0.16g, reflux and stir at 80°C for 5 hours. After the reaction, the solution was filtered, washed several times with ethanol and water, and dried at 80 °C for 8 h under vacuum to obtain Cu coated with phenolic resin. 6 ...
Embodiment 2
[0031] Nano-SnO prepared by hydrothermal method 2 And nano CuO as raw material. Weigh 1.5g nanometer SnO 2 , CuO (molar ratio 5:6) powder, dispersed in a certain amount of toluene solution, adding 0.5ml of hexadecyltrimethoxysilane solution, high-power ultrasonic dispersion for 1h, then filtered, washed several times with ethanol, and Put the black powder into a vacuum drying oven at 80°C for 8 hours to obtain hydrophobized SnO 2 , CuO particles. Add the hydrophobized oxide particles to a mixed solution of 100ml water and 100ml furfural, add 0.08g cetyltrimethylammonium bromide (CTAB), and ultrasonically disperse for 30min. Then add 0.5g resorcinol in the mixed solution, pass into N 2 Gas for 20 minutes to remove oxygen, add anhydrous sodium carbonate 0.16g, reflux and stir at 80°C for 5 hours. After the reaction, the solution was filtered, washed several times with ethanol and water, and dried at 80 °C for 8 h under vacuum to obtain furfural resin-coated Cu 6 sn 5 part...
Embodiment 3
[0033] Nano-Co prepared by thermal decomposition method 3 o 4 and nano SnO 2 For the raw material. Weigh 1.5g nanometer Co 3 o 4 , SnO 2 (molar ratio 1:3) powder, dispersed in a certain amount of toluene solution, adding 0.5ml of hexadecyltrimethoxysilane solution, high-power ultrasonic dispersion for 1h, then filtered, washed several times with ethanol, the black powder Put it in a vacuum drying oven at 80°C for 8 hours to obtain hydrophobized SCo 3 o 4 , SnO 2 particle. Add the hydrophobized oxide particles to a mixed solution of 100ml water and 100ml formaldehyde, add 0.08g cetyltrimethylammonium bromide (CTAB), and ultrasonically disperse for 30min. Then add 0.5g resorcinol in the mixed solution, pass into N 2 Gas for 20 minutes to remove oxygen, add anhydrous sodium carbonate 0.16g, reflux and stir at 80°C for 5 hours. After the reaction, the solution was filtered, washed several times with ethanol and water, and dried at 80 °C for 8 h under vacuum to obtain Co...
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