Composite carbon material and preparation method and application thereof
A composite carbon and hard carbon technology, applied in nanotechnology, electrical components, electrochemical generators for materials and surface science, etc., can solve the problems of low conductivity of hard carbon materials, poor material rate performance, etc. Small, low energy consumption, short cycle effect
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Embodiment 1
[0031] Wash the cotton mask with deionized water for 30 minutes, then wash it with alcohol for 30 minutes, and then dry it at 60°C for 4 hours to obtain a purified hard carbon precursor; emulsify the hard carbon precursor Soak in asphalt for 1 hour, and then dry at 60°C for 4 hours to obtain a soft carbon / hard carbon composite precursor; place the above composite precursor in a tube furnace, feed argon, and heat up at a rate of 5°C / min Raise the temperature to 1400°C, keep the temperature at 1400°C for 2 hours, and then cool to room temperature to obtain a hard carbon / soft carbon composite carbon material with a one-dimensional core-shell structure. The product is detected as a carbon material by XRD, see figure 1 , the product is observed by a scanning electron microscope and is a one-dimensional core-shell structure with a length of 10 μm to 50 μm and a diameter of 2 μm to 5 μm. The thickness of the soft carbon layer is 10 nm to 50 nm, see figure 2 and image 3 . The com...
Embodiment 2
[0041] Wash the cotton gauze with deionized water for 30 minutes, then wash it with alcohol for 30 minutes, and then dry it at 60°C for 4 hours to obtain a purified hard carbon precursor; Soak in tar for 1 hour, and then dry at 60°C for 4 hours to obtain a soft carbon / hard carbon composite precursor; place the above composite precursor in a tube furnace, feed argon, and heat up at a rate of 4°C / min Raise the temperature to 1200°C, keep the temperature at 1200°C for 3 hours, and then cool to room temperature to obtain a hard carbon / soft carbon composite carbon material with a one-dimensional core-shell structure. The product is detected as a carbon material by XRD. The product is observed by a scanning electron microscope and has a one-dimensional core-shell structure with a length of 30 μm to 60 μm and a diameter of 3 μm to 6 μm. The thickness of the soft carbon layer is 20 nm to 60 nm. The composite carbon material prepared in this embodiment is used as the working electrode,...
Embodiment 3
[0043]Wash the cotton with deionized water for 30 minutes, then wash it with acetone for 30 minutes, and then dry it at 60°C for 4 hours to obtain a purified hard carbon precursor; soak the above cleaned hard carbon precursor in heavy oil 1 hour, and then dried at 60 °C for 4 hours to obtain a soft carbon / hard carbon composite precursor; the above composite precursor was placed in a tube furnace, fed with argon, and heated to 1600 °C at a heating rate of 6 °C / min ℃, kept at 1600°C for 2 hours, and then cooled to room temperature to obtain a hard carbon / soft carbon composite carbon material with a one-dimensional core-shell structure. The product is detected as a carbon material by XRD. The product is observed by a scanning electron microscope and has a one-dimensional core-shell structure with a length of 10 μm to 40 μm and a diameter of 3 μm to 6 μm. The thickness of the soft carbon layer is 10 nm to 40 nm. The composite carbon material prepared in this embodiment is used as ...
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Abstract
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