Preparation for shrimp/crab shell biomass charcoal based supercapacitor electrode material
A technology of supercapacitor and biomass carbon, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, carbon preparation/purification, etc. The effect of high specific surface area
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Embodiment 1
[0018] 1) Pretreatment: Clean 1KG of shrimp shells and 1KG of crab shells, dry them in a constant temperature drying oven at 60°C for 10 hours, pulverize them with a micro-nano pulverizer, and pass through a 800-mesh sieve to obtain 1000g of shrimp and crab shell powder;
[0019] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 600°C, the carbonization time is 5h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 300g of charred shrimp and crab shell powder is obtained;
[0020] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) is activated by washing with 20% KOH 900mL at 70°C for 1h, and using 5mol / L HCl 600mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 250 g of activated shrimp and crab shell powder;...
Embodiment 2
[0026] 1) Pretreatment: Clean 1.5KG of shrimp shells and 1.5KG of crab shells, dry them in a constant temperature drying oven at 100°C for 6 hours, pulverize them with a micro-nano pulverizer, and pass through a 500-mesh sieve to obtain 1350g of shrimp and crab shell powder;
[0027] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 1000°C, the carbonization time is 2h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 400g of charred shrimp and crab shell powder is obtained;
[0028] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) is activated by washing with 50% KOH 1200mL at 50°C for 3h, and using 3mol / L HCl 800mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 320 g of activated shrimp and crab shell p...
Embodiment 3
[0034] 1) Pretreatment: Clean 2KG of shrimp shells and 1KG of crab shells, dry them in a constant temperature drying oven at 80°C for 8 hours, pulverize them with a micro-nano pulverizer, and pass through a 700-mesh sieve to obtain 1300g of shrimp and crab shell powder;
[0035] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 800°C, the carbonization time is 4h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 380g of charred shrimp and crab shell powder are obtained;
[0036] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) was activated by washing with 30% KOH 1140mL at 70°C for 1h, and using 3mol / L HCl 760mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 280 g of activated shrimp and crab shell powde...
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