Spherical super-capacitor activated carbon, and preparation method and application thereof
A spherical, carbon-capacitating technology, applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve problems such as difficult to meet the requirements of supercapacitors, dendrite crystallization, short circuit of supercapacitors, etc.
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preparation example 1
[0090] The preparation of preparation example 1 spherical polymer matrix
[0091]Add 20 liters of water into a 50-liter polymerization kettle, heat it to 30°C, add 12g of magnesium carbonate, 24g of gelatin and 0.18g of methylene blue under stirring, and add 3.5kg of methyl styrene, 1.2kg of The oil phase that dipentene and 24g benzoyl peroxide are mixed, add 1.2kg paraffin again, seal polymerization kettle, pass into clean compressed air in the polymerization kettle, keep the gas phase pressure in the kettle to be 0.05MPa. Then, start stirring, adjust the liquid beads in the kettle to an appropriate particle size, raise the temperature to 90°C, keep the temperature for 12 hours, then raise the temperature to 110°C, keep the temperature for 20 hours, filter, wash, dry and sieve to obtain the white spherical polymer 2.6 kg, after testing, the BET of the product is 10.577m 2 / g.
Embodiment 1
[0093] 1.1 Carbonization
[0094] 220g median particle size D 50 Put the above-mentioned white spherical polymer into a rotary tube furnace with a thickness of 0.8mm, and carry out the following heat treatment at a heating rate of 5°C / min under a nitrogen atmosphere:
[0095] Heat to 100°C and stay for 100 minutes;
[0096] Heat to 150°C and stay for 200 minutes;
[0097] Carry out the following heat treatment at a heating rate of 6°C / min:
[0098] Heat to 300°C and stay for 100 minutes;
[0099] Heat to 500°C and stay for 200 minutes;
[0100] It was then heated to 650°C and held for 100 minutes. The temperature was lowered to obtain 200 g of carbonized product.
[0101] 1.2 Preactivation and activation
[0102] In a rotary tube furnace, under a mixed atmosphere of water vapor, carbon dioxide and nitrogen at a flow rate ratio of 1:1:4.5 (L / min), heat the carbonized product obtained in step 1.1 to 950 °C at a rate of 4 °C / min , stay for 360min, then heat to 1000℃ at a ...
Embodiment 2
[0104] 2.1 Sulfonation and carbonization
[0105] The median diameter D obtained by the preparation example 1 that the mass ratio is 1:1.5 50 0.8mm above-mentioned white ball polymer (200g) and SO 3 Mix, then put the mixture into an acid-resistant rotary tube furnace, and perform the following heat treatment at a heating rate of 4°C / min under a helium atmosphere:
[0106] Heat to 80°C and stay for 60 minutes;
[0107] Heat to 150°C and stay for 300 minutes;
[0108] With a heating rate of 3°C / min, in a mixed atmosphere with an oxygen volume percentage of 5%, the following heat treatment is carried out:
[0109] Heat to 200°C and stay for 90 minutes;
[0110] Heat to 500°C and stay for 320 minutes;
[0111] It was then heated to 600°C and held for 120 minutes. The temperature was lowered to obtain 156 g of carbonized product.
[0112] 2.2 Preactivation and activation
[0113] In a rotary tube furnace, under a mixed atmosphere of water vapor and nitrogen with a volume ra...
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