A kind of hierarchical porous carbon electrode material and preparation method for supercapacitor
A supercapacitor and hierarchical porous technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of low capacitance, poor rate retention performance, and inability to effectively control the aperture of micropores to achieve high electrochemical performance. performance, good electrochemical performance, and the effect of high specific surface area
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Embodiment 1
[0026] Take 2g Zn(NO 3 ) 2 6H 2 O and 0.5g of 2-methylimidazole were dissolved in 150ml of N,N-dimethylformamide to form a solution. Add 0.2g of SBA-15 to the above mixed solution, put the mixture in a hydrothermal kettle, and conduct hydrothermal treatment at 140°C for 24 hours. After hydroheating, the product is washed with N,N-dimethylformamide solution for more than 3 times, and the product is dried in an oven at 60°C. The dried product was carbonized at 800°C for 3h under nitrogen atmosphere. The carbonized product was treated with potassium hydroxide solution, then washed with deionized water until neutral; then treated with hydrochloric acid solution, and the obtained carbon material was washed with distilled water until neutral, and dried in an oven at 60°C for 24 hours. A hierarchically porous carbon is obtained. Physical adsorption tests show that the carbon material presents a concentrated pore distribution at 0.7nm and 2.6nm, such as figure 1 , indicating tha...
Embodiment 2
[0028] Take 2g Zn(NO 3 ) 2 6H 2 O and 0.5g of 2-methylimidazole were dissolved in 150ml of N,N-dimethylformamide to form a solution. Add 0.4g of SBA-15 to the above mixed solution, put the mixture in a hydrothermal kettle, and conduct hydrothermal treatment at 140°C for 24 hours. After hydroheating, the product is washed with N,N-dimethylformamide solution for more than 3 times, and the product is dried in an oven at 60°C. The dried product was carbonized at 800°C for 3h under nitrogen atmosphere. The carbonized product was treated with potassium hydroxide solution, then washed with deionized water until neutral; then treated with hydrochloric acid solution, and the obtained carbon material was washed with distilled water until neutral, and dried in an oven at 60°C for 24 hours. A hierarchically porous carbon is obtained. Physical adsorption tests show that the carbon material presents a concentrated pore distribution at 0.6nm and 1.8nm, such as image 3 , indicating tha...
Embodiment 3
[0030] Take 3g Zn(NO 3 ) 2 6H 2 O and 2.5g 2-methylimidazole, add 150ml methanol each to form a solution, then add 0.6g SBA-15, stir the above solution for 10 minutes, and react at room temperature for 24h. After the reaction, the product was washed with methanol solution for more than 3 times, and the product was dried in an oven at 60°C. The dried product was carbonized at 700°C for 3h under nitrogen atmosphere. The carbonized product was treated with potassium hydroxide solution, then washed with deionized water until neutral; then treated with hydrochloric acid solution, and the obtained carbon material was washed with distilled water until neutral, and dried in an oven at 60°C for 24 hours. A hierarchically porous carbon is obtained. The above-mentioned hierarchical porous carbon is mixed according to the ratio of active material: conductive agent: binder = 85:10:5 to prepare an electrode sheet, and a three-electrode cyclic voltammetry test is carried out in a 6M KOH ...
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