A kind of preparation method of ultra-thin two-dimensional carbon sheet
A carbon sheet and ultra-thin technology, which is applied in the field of preparation of ultra-thin two-dimensional carbon sheets, can solve the problems of difficult industrial scale production, high equipment requirements, and low yield, and achieve low cost, simple equipment requirements, and excellent performance. Effect
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Embodiment 1
[0026] Weigh 10 g of citric acid and 10 g of sodium hydroxide ball mill and mix them evenly, put them into a ceramic boat, place them in an argon atmosphere furnace, first raise the temperature to 400 °C at a heating rate of 5 °C / min, and keep it for 2 h; continue at a temperature of 5 °C / min to raise the temperature to 800°C, keep it warm for 1 h, then cool down to room temperature naturally, and take out the sample; after the obtained black blocky sample is pulverized, add 80 g of 50°C distilled water to carry out suction filtration washing, and repeat 5 times; Insulated and dried for 12 h to obtain ultra-thin two-dimensional carbon sheets. The obtained ultra-thin two-dimensional carbon sheets were used as electrode materials for potassium-ion batteries to assemble potassium-ion half-cells, and their performance was tested. The results are shown in Table 1.
Embodiment 2
[0028] Weigh 10 g of ammonium citrate and 10 g of sodium hydroxide ball mill and mix them evenly, put them into a porcelain boat, place them in an argon atmosphere furnace, first raise the temperature to 200 °C at a heating rate of 1 °C / min, and keep it warm for 0.5 h; °C / min to 1000 °C, keep warm for 1 h, then cool down to room temperature naturally, take out the sample; after the obtained black blocky sample is pulverized, add 200 g of 50 °C distilled water for suction filtration and washing, repeat 5 times; the filter residue after washing is 100 ℃ drying for 24 h to obtain ultra-thin two-dimensional carbon sheet. The obtained ultra-thin two-dimensional carbon sheets were used as electrode materials for potassium-ion batteries to assemble potassium-ion half-cells, and their performance was tested. The results are shown in Table 1.
Embodiment 3
[0030] Weigh 10 g of tetraethylamine adipate and 1 g of sodium hydroxide, mix them uniformly, put them into a porcelain boat, place them in an argon atmosphere furnace, first raise the temperature to 400 °C at a heating rate of 3 °C / min, and keep it warm for 0.5 h; Continue to heat up to 1200°C at 6°C / min, keep it warm for 3 hours, then cool down to room temperature naturally, and take out the sample; after the obtained black blocky sample is pulverized, add 30 g of distilled water at 100°C for suction filtration and washing, and repeat 5 times; The filter residue was dried at 120 °C for 20 h to obtain an ultrathin two-dimensional carbon sheet. The obtained ultra-thin two-dimensional carbon sheets were used as electrode materials for potassium-ion batteries to assemble potassium-ion half-cells, and their performance was tested. The results are shown in Table 1.
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