Method for preparing lithium ion battery carbon silicon anode material
A technology of lithium-ion batteries and negative electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that cannot meet the performance requirements of high-performance power lithium-ion batteries, and the effect is not ideal, and achieve rich pore structure and high relative area , Circulation improvement effect
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Embodiment 1
[0028] 50g resorcinol is dissolved in the formaldehyde solution of 65ml (concentration 38%), add 6ml (molar concentration 0.05mol / L) Na 2 CO 3 and 130ml of deionized water, stirred evenly, sealed, put into a 40°C incubator and left to stand for 10 hours. Add 10 grams of nano-silica powder, stir evenly and ultrasonically disperse for 30 minutes. Then add 30 grams of ultra-fine graphite powder, stir evenly, seal it and put it into a thermostat at 50°C for one day, at 70°C for one day, and at 90°C for two days. Put the above gel into acetone solution, soak it for 3 days, take it out and dry it. Finally, carbonization is carried out under the mixed atmosphere of nitrogen (or inert gas) and carbon dioxide gas with a molar ratio of 1:1, the heating rate is 3°C / min, and the temperature is raised to 1100°C for 7 hours. After cooling down to room temperature, a nano-carbon-silicon composite material is obtained.
[0029] The negative electrode material prepared above is used as the...
Embodiment 2
[0031] 30g resorcinol is dissolved in the formaldehyde solution of 40ml (concentration 38%), add 4ml (molar concentration 0.05mol / L) Na 2 CO 3 and 160ml of deionized water, stirred evenly, sealed, put into a 40°C incubator and left to stand for 10 hours. Add 20 grams of nano-silica powder, stir evenly and ultrasonically disperse for 30 minutes. Then add 30 grams of ultra-fine graphite powder, stir evenly, seal it and put it into a thermostat at 50°C for one day, at 70°C for one day, and at 90°C for two days. Put the above gel into acetone solution, soak it for 3 days, take it out and dry it. Finally, carbonization is carried out in a mixed atmosphere of nitrogen (or inert gas) and carbon dioxide gas with a molar ratio of 1:1, and the heating rate is 3°C / min, and the temperature is raised to 1100°C for 5 hours at a constant temperature. After cooling down to room temperature, a nano-carbon-silicon composite material is obtained.
[0032] The negative electrode material prep...
Embodiment 3
[0034] 58.9g resorcinol is dissolved and in the formaldehyde solution of 70ml (concentration 38%), add 7ml (molar concentration 0.05mol / L) Na 2 CO 3 and 73ml of deionized water, stirred evenly, sealed, and put into a 40°C thermostat for 10 hours. Add 25 grams of nano-silica powder, stir evenly and ultrasonically disperse for 30 minutes. Then add 25 grams of ultra-fine graphite powder, stir evenly, and put it into a thermostat at 50°C for one day, 70°C for one day, and 90°C for two days after sealing. Put the above gel into acetone solution, soak it for 3 days, take it out and dry it. Finally, carbonization is carried out under the mixed atmosphere of nitrogen (or inert gas) and carbon dioxide gas with a molar ratio of 1:2, and the heating rate is 3°C / min, and the temperature is raised to 1100°C for 5 hours at a constant temperature. After cooling down to room temperature, a nano-carbon-silicon composite material is obtained.
[0035] The negative electrode material prepare...
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