A use of sio 2 Method for preparing biomass carbon material with microporous and mesoporous structure by coating method
A biomass carbon, mesoporous structure technology, applied in the preparation/purification of carbon, can solve problems such as defects, unfavorable electrolyte transfer lithium ion diffusion, neglect, etc., achieve high repetition rate, prevent agglomeration and internal shrinkage, The effect of promoting diffusion
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Embodiment 1
[0015] Add 5 mL of hydrogen peroxide with a mass concentration of 30% to 20 mL of turbid liquid containing 1.25 g of bagasse, ultrasonicate the mixture for 8 min, centrifuge and wash 3 times, add the product to a mixed solution of 30 mL of water and 150 mL of ethanol, and then add 4 mL of NH 3 ·H 2 O ultrasonication for 15min, stirring at a stirring rate of 220rpm for 10h, and adding 1mL tetraethyl orthosilicate every 30min within the first 2h, after the reaction was completed, the reaction product was centrifuged and washed 3 times, washed with ethanol twice, centrifuged for 6min, and poured out The supernatant was dried naturally in a cool place, and the dried sample was heated up to 600°C for 2 hours at a heating rate of 5°C / min in a nitrogen atmosphere, and then mixed with KOH at a mass ratio of 1:4 after cooling down, and the mixture was Under a nitrogen atmosphere, heat up to 800°C for 3 hours at a heating rate of 5°C / min to activate the carbon material and etch the surf...
Embodiment 2
[0017] Add 5 mL of 30% hydrogen peroxide to 20 mL of turbid liquid containing 1.5 g of bagasse, ultrasonicate the mixture for 8 min, centrifuge and wash 3 times, add the product to a mixed solution of 30 mL of water and 150 mL of ethanol, and then add 4 mL of NH 3 ·H 2 O ultrasonication for 15min, stirring at a stirring rate of 220rpm for 10h, and adding 1mL tetraethyl orthosilicate every 30min within the first 2h, after the reaction was completed, the reaction product was centrifuged and washed 3 times, washed with ethanol twice, centrifuged for 6min, and poured out The supernatant was dried naturally in a cool place, and the dried sample was heated up to 600°C for 2 hours at a heating rate of 5°C / min in a nitrogen atmosphere, and then mixed with KOH at a mass ratio of 1:4 after cooling down, and the mixture was Under a nitrogen atmosphere, heat up to 800°C for 3 hours at a heating rate of 5°C / min to activate the carbon material and etch the surface SiO 2 Finally, a hierarch...
Embodiment 3
[0019] Add 5 mL of 30% hydrogen peroxide to 20 mL of turbid liquid containing 1.75 g of bagasse, ultrasonicate the mixture for 8 min, centrifuge and wash 3 times, add the product to a mixed solution of 30 mL of water and 150 mL of ethanol, and then add 4 mL of NH 3 ·H 2 O ultrasonication for 15min, stirring at a stirring rate of 220rpm for 10h, and adding 1mL tetraethyl orthosilicate every 30min within the first 2h, after the reaction was completed, the reaction product was centrifuged and washed 3 times, washed with ethanol twice, centrifuged for 6min, and poured out The supernatant was dried naturally in a cool place, and the dried sample was heated up to 600°C for 2 hours at a heating rate of 5°C / min in a nitrogen atmosphere, and then mixed with KOH at a mass ratio of 1:4 after cooling down, and the mixture was Under a nitrogen atmosphere, heat up to 800°C for 3 hours at a heating rate of 5°C / min to activate the carbon material and etch the surface SiO 2 Finally, a hierarc...
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