A method for preparing silicon-carbon nanotube negative electrode material by catalysis
A technology of carbon nanotubes and negative electrode materials, which is applied in the field of preparing silicon-carbon nanotube negative electrode materials, can solve the problems of carbon nanotubes that are difficult to achieve complete dispersion, limited improvement, and damage to the conductive network, and achieve good application prospects and cycle performance. Enhanced effect
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Embodiment 1
[0027] Select silicon oxide with an average particle size of 2 μm (purity >99.9%), add 1 wt% of asphalt, mix the two thoroughly, transfer them to an atmosphere furnace, heat up to 1050 °C at 5 °C / min, and perform reaction heat treatment Naturally cool to room temperature after 5 hours;
[0028] The obtained material: natural graphite (15um, purity >99.9%, Shanghai Shanshan product) = 20:80 compound, and processed in a horizontal mixer for 2 hours, to obtain a system in which the two are in uniform contact;
[0029] Then add metal nickel powder 1wt.% (0.5um, 99.9%) and mix again in the same way for 2 hours, transfer the above particles to a CVD furnace, raise the temperature to 650 degrees at 5°C / min under the protection of argon, and switch to ethylene The content is 10% ethylene / argon gas mixture, the flow rate is 30 sccm, switch to argon after 30 minutes of reaction, the flow rate is 50 sccm, until the finished product is obtained after cooling down to room temperature.
Embodiment 2
[0031] Select silicon oxide with an average particle size of 2 μm (purity>99.9%), add 1 wt% of asphalt, mix the two thoroughly and evenly, transfer them to an atmosphere furnace, raise the temperature to 1050 °C at 5 °C / min, and conduct heat treatment for 5 Naturally cool to room temperature after 1 hour;
[0032] The obtained material: natural graphite (15um, purity >99.9%, Shanghai Shanshan product) = 20:80 compound, and processed in a horizontal mixer for 2 hours, to obtain a system in which the two are in uniform contact;
[0033] Then add ferric oxide 1wt% (0.5um, 99.9%) and mix again in the same way for 2 hours, transfer the above particles to a CVD furnace, raise the temperature to 650 degrees at 5°C / min under the protection of argon, and switch to ethylene The content is 10% ethylene / argon gas mixture, the flow rate is 30 sccm, switch to argon after 30 minutes of reaction, the flow rate is 50 sccm, until the finished product is obtained after cooling down to room tempe...
Embodiment 3
[0035] Select silicon powder with an average particle size of 0.5 μm (purity >99.9%), add 1 wt% of asphalt, mix the two thoroughly, transfer them to an atmosphere furnace, heat up to 1050 °C at 5 °C / min, and perform reaction heat treatment Cool to room temperature naturally after 5 hours;
[0036] The obtained material: natural graphite (15um, purity >99.9%, Shanghai Shanshan product) = 20:80 compound, and processed in a horizontal mixer for 2 hours, to obtain a system in which the two are in uniform contact;
[0037] Then add metal nickel powder 1wt% (0.5um, 99.9%) and mix again in the same way for 2 hours, transfer the above particles to a CVD furnace, raise the temperature to 650 degrees at 5°C / min under the protection of argon, and switch to the ethylene content It is a 10% ethylene / argon gas mixture with a flow rate of 30 sccm. After 30 minutes of reaction, switch to argon with a flow rate of 50 sccm until the finished product is obtained after cooling down to room temper...
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