US 12,355,067 B2
Carbon-silicon three-dimensional structural composite material and preparation method thereof
Xuelian Wu, Fujian (CN); and Enqiang Zhang, Fujian (CN)
Assigned to Hithium Tech HK Lmited, HongKong (CN)
Filed by Hithium Tech HK Limited, HongKong (CN)
Filed on Sep. 21, 2023, as Appl. No. 18/472,214.
Application 18/472,214 is a division of application No. 17/875,611, filed on Jul. 28, 2022, granted, now 11,817,574.
Claims priority of application No. 202110863229.8 (CN), filed on Jul. 29, 2021.
Prior Publication US 2024/0014383 A1, Jan. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C01B 32/184 (2017.01); C01B 32/198 (2017.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01)
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)] 9 Claims
OG exemplary drawing
 
1. A preparation method of a carbon-silicon three-dimensional structural composite material, comprising the following steps:
a first step of dissolving 0.05 g of graphene quantum dots in 4 ml to 6 ml of ultrapure water, dropwise adding 0.75 ml of a CuCl2 or ZnCl2 solution having a concentration of 0.25 mol/ml, and performing oscillation to generate a mixed emulsifier;
a second step of mixing the mixed emulsifier obtained in the first step with 15 ml of a graphite oxide aqueous solution having a concentration of 15 mg/ml and 15 ml of a cyclohexane solution containing 0.15 g of nanosilicon spheres, and performing homogenization for 25 s to form a uniform oil-in-water emulsion;
a third step of adding 0.9 g 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.