Carbon nanotube/silicon/graphene composite material, preparation method thereof and lithium ion battery
A silicon composite material, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of large volume change and shorten the life of lithium-ion batteries, and achieve simple equipment, excellent energy storage performance and cycle performance , Easy to operate and feasible effect
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[0033] Example 1
[0034] 1. The substrate copper foil is ultrasonically cleaned with deionized water, ethanol, and acetone, and then dried, and then the substrate copper foil is put into the reaction chamber, and nitrogen is introduced to form a nitrogen atmosphere in the reactor, using a mechanical pump , Roots pump and molecular pump pump pressure step by step, pumping the pressure in the reaction chamber to 10 -3 Below Pa, keep it for 1 minute, stop passing nitrogen and stop pumping;
[0035] 2. Heat the substrate copper foil to 500°C, then pass methane with a flow rate of 50ml / min into the reaction chamber, keep the temperature unchanged, and stop passing methane after reacting for 1 minute to obtain carbon nanotube material;
[0036] 3. Then pass silicon tetrahydrogen with a flow rate of 50ml / min into the reaction chamber, and after keeping it for 1 minute, stop heating the substrate copper foil and cool it to room temperature to obtain a carbon nanotube / silicon composite mater...
Example Embodiment
[0038] Example 2
[0039] 1. The substrate iron foil is ultrasonically cleaned with deionized water, ethanol, and acetone, and then dried, and then the substrate iron foil is placed in the reaction chamber, and helium gas is introduced to form a helium atmosphere in the reactor. Mechanical pump, Roots pump and molecular pump pump pressure step by step, pumping the pressure in the reaction chamber to 10 -3 Below Pa, keep for 12 minutes, stop passing helium and stop pumping;
[0040] 2. Heat the substrate iron foil to 800°C, then pass ethane with a flow rate of 100ml / min into the reaction chamber, keep the temperature constant, after 30 minutes of reaction, stop passing ethane to obtain carbon nanotube material;
[0041] 3. Then pass silicon tetrahydrogen with a flow rate of 100ml / min into the reaction chamber, and after keeping it for 30 minutes, stop heating the substrate iron foil and cool it to room temperature to obtain a carbon nanotube / silicon composite material;
[0042] 4. Take...
Example Embodiment
[0043] Example 3
[0044] 1. The substrate iron foil is ultrasonically cleaned with deionized water, ethanol, and acetone, and then dried, and then the substrate iron foil is put into the reaction chamber, and argon is introduced to form an argon atmosphere in the reactor. Mechanical pump, Roots pump and molecular pump pump pressure step by step, pumping the pressure in the reaction chamber to 10 -3 Below Pa, keep it for 15 minutes, stop passing argon and stop pumping;
[0045] 2. Heat the substrate iron foil to 1000°C, then feed ethylene with a flow rate of 200ml / min into the reaction chamber, keep the temperature constant, and stop feeding ethylene after 1 to 300 minutes of reaction to obtain carbon nanotube material;
[0046] 3. Then pass the silicon tetrahydrogen with a flow rate of 200ml / min into the reaction chamber, and after keeping it for 100 minutes, stop heating the substrate iron foil and cool it to room temperature to obtain a carbon nanotube / silicon composite material; ...
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