CPC H01M 4/364 (2013.01) [C01B 32/184 (2017.08); C01B 32/198 (2017.08); H01M 4/386 (2013.01); H01M 4/587 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01B 2204/22 (2013.01)] | 18 Claims |
1. A preparation method of a carbon-silicon three-dimensional structural composite material, comprising the following steps:
a first step of dissolving 0.004 g to 0.006 g of graphene quantum dots in 4 ml to 6 ml of ultrapure water, dropwise adding 0.65 ml to 0.85 ml of a CuCl2 or ZnCl2 solution having a concentration of 0.2 mol/ml to 0.3 mol/ml, and performing oscillation to generate a mixed emulsifier;
a second step of mixing the mixed emulsifier obtained in the first step with 10 ml to 20 ml of a graphite oxide aqueous solution having a concentration of 10 mg/ml to 20 mg/ml and 10 ml to 20 ml of a cyclohexane solution containing 0.1 g to 0.2 g of nanosilicon spheres, and performing homogenization for 20 s to 30 s to form a uniform oil-in-water emulsion;
a third step of adding 0.9 g to 1.2 g of hydrazine hydrate into the emulsion obtained in the second step for reduction, and performing a hydrothermal reaction to obtain a reduced emulsion; and
a fourth step of freeze-drying the reduced emulsion obtained in the third step, performing washing with a washing liquid, and performing vacuum drying, to obtain the carbon-silicon three-dimensional structural composite material.
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