Carbon/silicon/carbon nano composite structure cathode material and preparation method thereof
A carbon nanocomposite, negative electrode material technology, applied in the field of electrochemical power supply, can solve the problems of large polarization, poor cycle stability, limited practical application, etc., and achieve the effects of stable material, good repeatability, and controllable geometric structure
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Embodiment 1
[0022] The porous carbon particle that weighs 1g is placed in a quartz boat, packs into the horizontal tube furnace, and the quartz boat is placed in the middle of the tube furnace, then feeds the mixed gas of argon and hydrogen (9 / 1, v / v), the total flow rate is 100sccm, after the program temperature rises to 1000°C, start to feed SiCl 4 , the flow rate is 20 sccm, and a vacuum is drawn at one end of the gas outlet, and after constant temperature for 60 minutes, it is naturally cooled to room temperature. Then feed argon in the tube furnace, the flow rate is 20 sccm, the temperature is programmed to 950 ° C, the gas is converted into a mixed gas of benzene and argon, the ratio is 1 / 20 (v / v), and the total flow rate is 300 sccm, After 20 minutes at constant temperature, the gas was converted into argon, and naturally cooled to room temperature, the resulting product was a nano-carbon / nano-silicon / porous carbon composite material, wherein the weight percentage of silicon in th...
Embodiment 2
[0024] The multi-walled carbon nanotube particle that takes 1g is packed in the vertical tubular furnace, feeds the mixed gas (95 / 5, v / v) of argon and hydrogen, and total flow is 200sccm, makes the multi-walled carbon in the furnace Nanotube particle fluidization. After the temperature was programmed to 900°C, SiH was introduced into the 4 , the flow rate is 40sccm, and one end of the gas outlet is vacuumized, and after constant temperature for 60 minutes, it is naturally cooled to room temperature. Then, argon gas is introduced into the tube furnace with a flow rate of 200 sccm to fluidize the particles in the furnace, and the temperature is programmed to 1000 ° C to convert the gas into acetylene with a flow rate of 100 sccm. After 10 minutes at constant temperature, the gas is converted into argon gas , naturally cooled to room temperature, the resulting product is nano-carbon / nano-silicon / multi-walled carbon nanotube composite material, wherein the weight percentage of si...
Embodiment 3
[0026] The graphene particle that takes 1g is placed in the quartz boat, packs into the horizontal tube furnace, and the quartz boat is placed in the middle of the tube furnace, then feeds the mixed gas of argon and hydrogen (9 / 1, v / v), the total flow rate is 150sccm, after the temperature is programmed to 900°C, HSiCl is started to be introduced 3 , with a flow rate of 50 sccm, and vacuumize at one end of the gas outlet, keep the temperature constant for 2 hours, and cool down to room temperature naturally. Then feed argon in the tube furnace, the flow rate is 20 sccm, the temperature is programmed to 950 ° C, the gas is converted into a mixed gas of benzene and argon, the ratio is 1 / 10 (v / v), and the total flow rate is 300 sccm, After 20 minutes at constant temperature, the gas is converted into argon, and naturally cooled to room temperature, the resulting product is a nano-carbon / nano-silicon / graphene composite material, wherein the weight percentage of silicon in the com...
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