Preparation method of iron-based-carbon composite material with core-shell structure
A technology of carbon composite material and core-shell structure, applied in the direction of structural parts, electrical components, electrochemical generators, etc., can solve the problems of capacity attenuation, achieve improved conductivity, good application prospects, and facilitate embedding/removal Effect
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example 1
[0024] A method for preparing an iron-based-carbon composite material with a one-layer core-shell structure comprises:
[0025] 1) Weigh a certain mass of soluble iron salt, trisodium citrate, and ethanol / water mixture and mix them, and conduct a hydrothermal reaction at 160°C for 10 hours; wherein, the volume ratio of ethanol / water is 80;
[0026] 2) Disperse the product of step 1 in an alcoholic solvent, add water and tetraethyl silicate, and stir at 40°C for 5 hours; filter and wash; wherein, the molar ratio of iron to silicon is 5;
[0027] 3) Put the product of step 2 into cetyltrimethylamine bromide, water, phenolic compounds, absolute ethanol, ammonia water, and aldehyde compounds in sequence, and stir at 50°C for 5 hours; filter and wash;
[0028] 4) with step 3 product in N 2 Carbonization at 600°C for 5 hours under atmosphere;
[0029] 5) Put the product of step 4 into a strong alkali solution for 10 hours; wash and dry;
[0030] 6) Mix the product of step 5 with ...
example 2
[0036] A method for preparing an iron-based-carbon composite material with a two-layer core-shell structure comprises:
[0037] 1) Weigh a certain mass of soluble iron salt, trisodium citrate, and ethanol / water mixture and mix them, and conduct a hydrothermal reaction at 180°C for 5 hours; wherein, the volume ratio of ethanol / water is 90;
[0038] 2) Disperse the product of step 1 in an alcoholic solvent, add water and tetraethyl silicate, and stir at 40°C for 5 hours; filter and wash; wherein, the molar ratio of iron to silicon is 4;
[0039] 3) Put the product of step 2 into cetyltrimethylamine bromide, water, phenolic compounds, absolute ethanol, ammonia water, and aldehyde compounds in sequence, and stir at 50°C for 5 hours; filter and wash;
[0040] 4) with step 3 product in N 2 Carbonization at 500°C for 10h under atmosphere;
[0041] 5) Repeat the cycle of steps 1, 2, 3, and 4 for the product of step 4 once;
[0042] 6) Put the product of step 5) into a strong alkali...
example 3
[0051] A method for preparing an iron-based-carbon composite material with a three-layer core-shell structure comprises:
[0052] 1) Weigh a certain mass of soluble iron salt, trisodium citrate, and ethanol / water mixture and mix them, and conduct a hydrothermal reaction at 200°C for 4 hours; wherein, the volume ratio of ethanol / water is 85;
[0053] 2) Disperse the product of step 1 in an alcoholic solvent, add water and tetraethyl silicate, and stir at 40°C for 5 hours; filter and wash; wherein the molar ratio of iron to silicon is 2;
[0054] 3) Put the product of step 2 into cetyltrimethylamine bromide, water, phenolic compounds, absolute ethanol, ammonia water, and aldehyde compounds in sequence, and stir at 50°C for 5 hours; filter and wash;
[0055] 4) with step 3 product in N2 Carbonization at 600°C for 5 hours under atmosphere;
[0056] 5) Repeat the cycle of steps 1, 2, 3, and 4 for the product of step 4 for 2 times;
[0057] 6) Put the product of step 5) into a str...
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