Method of preparing electrode material for carbon-based supercapacitor by taking bamboo powder as raw material
A technology of supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., to achieve the effect of improving capacitance performance
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Embodiment 1
[0027] (1) Preparation of carbonized bamboo carbon powder
[0028] Place 60 g of moso bamboo powder in a temperature-programmed tube furnace, and raise the temperature from room temperature to 200 °C at a rate of 3 °C / min under nitrogen protection, and then keep it at this temperature for 2 hours to remove moisture and initially carbonize, then The temperature was raised to 750°C at 3°C / min, and kept at this temperature for 2 hours to remove volatile organic compounds and carbonize solid residues. Promptly obtain brown black carbonized bamboo charcoal powder 20g after temperature is down to room temperature.
[0029] (2) Preparation of activated bamboo charcoal powder
[0030] Mix 10g of the carbonized product prepared in step (1) with 40g of potassium hydroxide and 50mL of water (mass ratio 1:4:5), stir evenly, and heat in an oven at 100°C until the moisture content in the mixture is 20% of the initial value to obtain Black gelatinous paste. Then transfer the black colloid...
Embodiment 2
[0038] (1) Preparation of carbonized bamboo carbon powder
[0039] Place 60 g of moso bamboo powder in a temperature-programmed tube furnace, raise the temperature from room temperature to 250 °C at a rate of 5 °C / min under nitrogen protection, and then keep it at this temperature for 2 hours to remove moisture and initially carbonize, then The temperature was raised to 800°C at 5°C / min, and kept at this temperature for 2 hours to remove volatile organic compounds and carbonize solid residues. Will obtain brown black carbonized bamboo carbon powder 18g after temperature is down to room temperature.
[0040] (2) Preparation of activated bamboo charcoal powder
[0041] Mix 10g of the carbonized product prepared in step (1) with 50g of sodium hydroxide and 70mL of water (mass ratio 1:5:7), stir evenly, and heat in an oven at 100°C until the moisture content in the mixture is 25% of the initial value to obtain Black gelatinous paste. Then the black slurry was transferred to a t...
Embodiment 3
[0046] (1) Preparation of carbonized bamboo carbon powder
[0047] Place 60 g of moso bamboo powder in a temperature-programmed tube furnace, raise the temperature from room temperature to 300 °C at a rate of 1 °C / min under nitrogen protection, and then keep it at this temperature for 2 hours to remove moisture and initially carbonize, then The temperature was raised to 900°C at 1°C / min, and kept at this temperature for 2 hours to remove volatile organic compounds and carbonize solid residues. After the temperature is down to room temperature, 15g of brown-black carbonized bamboo charcoal powder will be obtained.
[0048] (2) Preparation of activated bamboo charcoal powder
[0049] Mix 10g of the carbonized product prepared in step (1) with 25g of potassium hydroxide and 30mL of water (mass ratio 2:5:6), stir evenly, and heat in an oven at 100°C until the moisture content in the mixture is 18% of the initial value to obtain Black gelatinous paste. Then the black slurry was ...
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