Preparation method and application of Al-MOF negative electrode material synthesized by solvothermal method
A negative electrode material and solvothermal technology, which is applied in the preparation and application of solvothermal synthesis of Al-MOF negative materials, can solve the problems of material economic loss, environmental pollution, unfavorable sustainable green development, etc., and achieves easy-to-scale industrialization. The effect of production, low cost and simple process equipment
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[0041] As shown in the figure, the present invention provides a preparation method for solvothermal synthesis of Al-MOF negative electrode materials, including the following steps:
[0042] 1. Synthesis of Al-MOF materials by solvothermal method:
[0043](a) Aluminum-silicon alloy powder is used as raw material, and the particle size is 0.1-80 μm. Mix a certain amount of the aluminum-silicon alloy powder with an inorganic acid solution, and gently magnetically stir it to cause a dealloying reaction, wherein the mass concentration of the corrosion solution is 1-40%, the reaction temperature is 25-100°C, and the reaction time is 1 -48h. Finally, the solid-liquid separation is realized with a suction filtration device, wherein the porous silicon solid particles are washed 3-6 times with deionized water and absolute ethanol solution, and the obtained aluminum salt solution in the filter bottle is collected separately for future use.
[0044] In step (a), the inorganic acid solut...
Embodiment 1
[0054] Aluminum-silicon alloy is used as the raw material, and the D50 particle size is about 6 μm; the micron alloy powder is subjected to a dealloying chemical reaction with 2mol / L HCl solution, stirred gently for 10 hours, and the reaction temperature is 50°C, and finally passed through a suction filtration device Obtain porous silicon solid particles and aluminum trichloride salt solution respectively; Aluminum trichloride salt solution (5ml), terephthalic acid (0.61g), PVP (1.83g) obtained after the above-mentioned dealloying are added to 60ml of In the mixed solution of DMF and 10ml deionized water, stir magnetically for 0.5h until the solution is uniformly mixed; put the above-mentioned uniformly stirred mixed solution into a 100ml reactor for hydrothermal reaction. The temperature of the hydrothermal reaction is 150°C. The time was 6 hours. After the hydrothermal reaction, the mixed solution was naturally cooled to obtain a white substance, which was then centrifuged wi...
Embodiment 2
[0056] Aluminum-silicon alloy is used as the raw material, and the D50 particle size is about 6 μm; the micron alloy powder is subjected to a dealloying chemical reaction with 2mol / L HCl solution, stirred gently for 10 hours, and the reaction temperature is 50°C, and finally passed through a suction filtration device Obtain porous silicon solid particles and aluminum trichloride salt solution respectively; Aluminum trichloride salt solution (5ml), terephthalic acid (0.61g), PVP (1.83g) obtained after the above-mentioned dealloying are added to 60ml of In the mixed solution of DMF and 10ml deionized water, stir magnetically for 0.5h until the solution is uniformly mixed; put the above-mentioned uniformly stirred mixed solution into a 100ml reactor for hydrothermal reaction. The temperature of the hydrothermal reaction is 150°C. The time was 9 hours. After the hydrothermal reaction, the mixed solution was naturally cooled to obtain a white substance, and then it was washed with d...
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