Preparation method and application of nitrogen, oxygen, sulfur and chlorine multiple heteroatom doped porous carbon material
A technology of porous carbon materials, nitrogen, oxygen, sulfur and chlorine, applied in the field of electrochemical energy, can solve the problem that supercapacitors cannot maintain high rate performance stability, and achieve the goal of improving electron transfer ability, charging and discharging performance, and increasing power density Effect
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Embodiment 1
[0057] Example 1: Preparation of composite material M1
[0058] S1: Weigh the ratio of N,N-2-methylthiocarboxamide to hexachlorobutadiene at 1:1, and use a pipette to measure 2.1 mL of N,N-2-methylmethane thiocarbamide and 4mL of hexachlorobutadiene, pour the liquid mixture into a 50mL polytetrafluoroethylene reaction kettle, and then put the whole in a stainless steel outer kettle, and tighten the outer kettle cover, and finally at 180 ℃ The high pressure reaction was carried out for 6h, and the material was pre-carbonized.
[0059] S2: lower it to room temperature to take out the black solid product, wash and centrifuge three times with absolute ethanol, set the oven at 80°C for 8 hours, and then take out the dried sample to obtain an intermediate product.
[0060] S3: Grind the intermediate product finely, take an appropriate amount of crude product and put it in a porcelain boat, put it in the middle of the heating zone of the tube furnace, first pass nitrogen for 3 min...
Embodiment 2-3
[0061] Example 2-3: Preparation of composite materials M2, M3
[0062] Except for replacing the molar ratio of N,N-2-methylthiocarboxamide and hexachlorobutadiene with 1:2 and 2:1 in the above-mentioned step S1, other operations are unchanged, thus repeating Operation Example 1 , so that Examples 2-3 were carried out in sequence, and the obtained composite materials were named M2 and M3 in turn.
[0063] Microscopic characterization:
[0064] The microscopic characterization of the nitrogen-oxygen-sulfur-chlorine multi-heteroatom-doped porous carbon material M1 obtained in Example 1 was carried out by a number of different means, and the results are as follows:
[0065] 1. By figure 1 The SEM image of the composite material M1 shows that the composite material M1 is in a state of spheroid bonding, and the spheroids are evenly distributed, indicating that the material is amorphous carbon; the structure of the spheroid bonding can greatly improve the electron transfer abil...
Embodiment 4
[0089] Example 4: Preparation of Supercapacitor Electrode M1 Electrode:
[0090] A: Cut the current collector stainless steel mesh into strips, rinse with alcohol several times, dry and weigh for later use.
[0091] B: The ratio of doped porous carbon material, acetylene black, and polytetrafluoroethylene with nitrogen, oxygen, sulfur, and chlorine multiple heteroatoms = 8:1:1. After weighing, put it in an agate mortar, add absolute ethanol, grind and mix evenly , continuously stir into a paste, and use a metal spoon to apply the material to the stainless steel mesh weighed in step A (a current collector is about 2-3mg active material is best); put the coated working electrode under the infrared lamp Dry and dry, and then perform tablet pressing (pressure 10MPa, lasting 2min) to obtain electrodes and weigh them. After the electrodes are prepared, they are placed in the electrolyte solution for testing (0.5M-H 2 SO 4 ) for more than 10 hours.
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