A kind of preparation method of nitrogen-doped capsule structure carbon material
A nitrogen-doped, carbon material technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problem of energy density to be improved, and achieve the effect of excellent electrochemical characteristics
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Embodiment 1
[0030] (1) Weigh 400 mg of cobalt chloride and add it to 20 ml of deionized water, and ultrasonically disperse for 15 minutes to obtain a cobalt chloride solution;
[0031] (2) Weigh 800mg of hexamethylenetetramine and add it to 20ml of deionized water, and carry out ultrasonic dispersion for 15min to obtain hexamethylenetetramine solution;
[0032] (3) The cobalt chloride solution dispersed in the step (1) and the hexamethylenetetramine solution obtained in the step (2) were subjected to ultrasonication for 15 min to obtain a mixed solution;
[0033] (4) All the mixed solution obtained in step (4) was transferred into a polytetrafluoroethylene stainless steel reaction kettle, and a hydrothermal reaction was carried out at 120° C. for 20 h, then lowered to room temperature and centrifuged and freeze-dried to obtain cobalt hydroxide powder, Its scanning electron microscope picture is shown in figure 1 a;
[0034] (5) Add 200mg of cobalt hydroxide powder into 100ml of deionize...
Embodiment 2
[0042] (1) Weigh 600 mg of cobalt chloride and add it to 20 ml of deionized water, and ultrasonically disperse for 30 minutes to obtain a cobalt chloride solution;
[0043] (2) Weigh 1800 mg of hexamethylenetetramine and add it to 80 ml of deionized water, and perform ultrasonic dispersion for 30 minutes to obtain a hexamethylenetetramine solution;
[0044] (3) The cobalt chloride solution dispersed in the step (1) and the hexamethylenetetramine solution obtained in the step (2) were subjected to ultrasonication for 15 min to obtain a mixed solution;
[0045] (4) Transfer all the mixed solution obtained in step (4) into a polytetrafluoroethylene stainless steel reactor, conduct a hydrothermal reaction at 120° C. for 24 hours, then cool down to room temperature, centrifuge and freeze-dry to obtain cobalt hydroxide powder;
[0046] (5) Add 200 mg of cobalt hydroxide powder into 100 ml of deionized water and stir for 15 minutes, then add 20 mg of ammonia water, and stir at room t...
Embodiment 3
[0054] (1) Weigh 400 mg of cobalt chloride and add it to 20 ml of deionized water, and ultrasonically disperse for 30 minutes to obtain a cobalt chloride solution;
[0055] (2) Weigh 900 mg of hexamethylenetetramine and add it to 30 ml of deionized water, and carry out ultrasonic dispersion for 30 minutes to obtain a hexamethylenetetramine solution;
[0056] (3) The cobalt chloride solution obtained by dispersing in step (1) and the hexamethylenetetramine solution obtained in step (2) were subjected to ultrasonication for 30 min to obtain a mixed solution;
[0057] (4) All the mixed solution obtained in step (4) was transferred into a polytetrafluoroethylene stainless steel reactor, and subjected to a hydrothermal reaction at 120° C. for 24 hours, then cooled to room temperature, centrifuged and freeze-dried to obtain cobalt hydroxide powder;
[0058] (5) Add 200 mg of cobalt hydroxide powder into 100 ml of deionized water and stir for 30 min, then add 40 mg of ammonia water, ...
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