A kind of nanotubular cuo/c composite material and preparation method thereof
A technology of composite materials and nanotubes, which is applied in the field of nanotube-shaped CuO/C composite materials and its preparation, can solve the problems of rapid discharge specific capacity decay, uneven product size, and difficult control of shape, so as to improve stability and cycle The effect of performance, uniform shape, simple and feasible reaction conditions
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Embodiment 1
[0031] 1) According to the mass ratio Cu:C=1:1, ceramic glaze colorant waste residue (CuO) (chemically pure, purchased from Xi’an Xiangtai Trading Co., Ltd.) and urea (CO(NH 2 ) 2 ) (Shanghai Hushi Reagent Co., Ltd.) were mixed evenly and fully ground to obtain a mixed powder, which was denoted as A powder;
[0032] 2) Put A powder in a crucible and put it into a muffle furnace. First, control the heating rate at 1°C / min, raise the temperature to 150°C, keep it for 0.5h, then continue to heat up, and control the heating rate at 40°C / min. The temperature was raised to 700°C, heat preservation treatment was performed for 2 hours, and the temperature was naturally lowered to obtain a nanotube-shaped CuO / C lithium-ion battery anode material, which had a nanoscale tubular structure.
[0033] from figure 1 It can be seen that the purity of CuO in the CuO / C material prepared in this example is relatively high.
Embodiment 2
[0035] 1) by mass ratio Cu: C=1:2 will analyze pure copper source (same as embodiment 1) and urea (CO(NH 2 ) 2 ) are mixed evenly and fully ground to obtain a mixed powder, which is denoted as A powder;
[0036] 2) Put the A powder in a crucible and put it into a muffle furnace. First, control the heating rate at 2°C / min, raise the temperature to a temperature range of 150°C, keep it for 2 hours, and then continue to heat up, and control the heating rate at 30°C / min. The temperature was raised to 500°C, the temperature was kept for 3 hours, and the temperature was naturally lowered to obtain a nanotube-shaped CuO / C lithium-ion battery anode material, which had a nanoscale tubular structure.
[0037] Depend on figure 2 and image 3 It can be seen that the CuO / C composite material with nanotubular structure prepared by this method has uniform morphology, the nanotube length is about 1-5 μm, the tube diameter is about 100-200 nm, and the tube wall thickness is about 30-50 nm....
Embodiment 3
[0039] 1) by mass ratio Cu: C=1:2 copper source (with embodiment 1) and urea (CO (NH 2 ) 2 ) are mixed evenly and fully ground to obtain a mixed powder, which is denoted as A powder;
[0040] 2) Put A powder in a crucible and put it into a muffle furnace. First, control the heating rate at 1°C / min, raise the temperature to a temperature range of 130°C, keep it for 4 hours, and then continue to heat up, and control the heating rate at 40°C / min. The temperature was raised to 400°C, the temperature was kept for 3 hours, and the temperature was naturally lowered to obtain a nanotube-shaped CuO / C lithium-ion battery negative electrode material, which has a nanoscale tubular structure.
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Abstract
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