Nitrogen-doped carbon micro-nanometer material and preparation method and application thereof
A nitrogen-doped carbon, micro-nano technology, applied in the intersection of energy materials and carbon materials, can solve problems such as difficulty in meeting the needs of anode materials for high-capacity lithium-ion batteries, and achieve good electrochemical activity, cycle performance, and repeatability. Strong, Inexpensive Effects
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[0028] see Figure 1-3 , the preparation method of nitrogen-doped carbon micro-nano material of the present invention, comprises the following steps:
[0029] 1) Cut the melamine nano-sponge into cubes with a size of 0.5-2 cm, clean them with absolute ethanol and distilled water, and dry them;
[0030] 2) Place 0.1-0.5 g of dried melamine nano-sponge in a tube furnace, and calcinate it under an argon atmosphere, at a calcination temperature of 500-900° C., a calcination time of 0.5-2 hours, and a heating rate of 2-10° C. / min; then cool to room temperature with the furnace to obtain nitrogen-doped carbon micro-nano material;
[0031] 3) Washing the nitrogen-doped carbon micro-nano material with distilled water for 3-5 times, then drying overnight, and grinding.
[0032] The nitrogen-doped carbon micro-nano material prepared by the invention has a size of micro-nano level. It can be used as a material for preparing the negative electrode of lithium / sodium ion battery. The r...
Embodiment 1
[0034] 1) Cut the commercial melamine nano-sponge into 0.5cm cubes, clean it with absolute ethanol and distilled water, and dry it overnight;
[0035] 2) Put 0.1 g of the material dried in step 1) in a tube furnace, and calcinate at 500° C. for 0.5 h under an argon atmosphere, with a heating rate of 2° C. / min. Cool to room temperature with the furnace to obtain nitrogen-doped carbon micro-nano materials;
[0036] 3) Wash the calcined product in step 2 with distilled water and dry overnight.
Embodiment 2
[0038] 1) Cut the commercial melamine nano-sponge into 1cm cubes, clean it with absolute ethanol and distilled water, and dry it overnight;
[0039] 2) Put 0.2 g of the material dried in step 1) into a tube furnace, and calcinate at 600° C. for 1 h under an argon atmosphere, with a heating rate of 5° C. / min. Cool to room temperature with the furnace to obtain nitrogen-doped carbon micro-nano materials;
[0040] 3) Wash the calcined product in step 2 with distilled water and dry overnight.
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