Preparation method for graphene-ionic liquid composite materials and preparation method for supercapacitor
A technology of supercapacitors and ionic liquids, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor separators, hybrid capacitor electrodes, etc., can solve problems affecting the energy storage performance of graphene composite materials, graphene structure damage, etc., to achieve The effect of green and pollution-free preparation, low cost and high energy storage performance
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[0031] In the preparation method of the above-mentioned graphene-ionic liquid composite material, the intercalated graphite is prepared first, and then the intercalated graphite is placed in the ionic liquid and subjected to centrifugal peeling under the joint action of an electric field and a magnetic field, and the obtained graphene-ionic liquid composite material High energy storage performance is maintained. In addition, in the process of using intercalated graphite to prepare graphene, except for the use of ionic liquids that can be used as electrolytes, there is basically no need to use other chemical reagents, which realizes green and pollution-free preparation. At the same time, the source of raw materials is wide, the cost is low, and the preparation The process is simple and easy to realize industrialization.
[0032] see figure 2 , the preparation method of the supercapacitor of an embodiment comprises the following steps:
[0033] S201, preparing a graphene-ioni...
Embodiment 1
[0041] (1) Put natural phosphorus flake graphite and ferric chloride intercalation agent with a mass ratio of 1:0.8 into a quartz tube, seal the quartz tube, heat it up at 460°C, and keep it warm for 2 hours. After the reaction, cool to room temperature, and After washing with deionized water and drying in a vacuum oven at 80°C for 6 hours, pure intercalated graphite can be obtained;
[0042] (2) Take the dried intercalated graphite and add it to the container containing 1-ethyl-3-methylimidazolium bromide at a temperature of 150°C according to the mass volume ratio of 1g:10mL. Take 1L of the mixture and add it to the capacity Cover the inside of a 2L high-speed centrifuge, add a constant parallel magnetic field with a magnetic field strength of 1T at both ends of the top and bottom of the centrifuge, and add a constant electric field with an electric field strength of 100V / m outside the parallel magnetic field. The top is positive and the bottom is Negative electrode, start m...
Embodiment 2
[0044] (1) Put artificial graphite and copper chloride intercalation agent with a mass ratio of 1:0.9 into a quartz tube, seal the quartz tube, heat it up at 500°C, and keep it warm for 3 hours. After the reaction, cool to room temperature and deionize After washing with water and drying in a vacuum oven at 90°C for 5 hours, pure intercalated graphite can be obtained;
[0045] (2) Take the dried intercalated graphite and add it to the container containing 1-ethyl-3-methylimidazolium chloride salt at a temperature of 180°C according to the mass volume ratio of 1g:100mL. Take 1L of the mixture and add it to the capacity Cover the inside of a 2L high-speed centrifuge, add a constant parallel magnetic field with a magnetic field strength of 0.5T at both ends of the top and bottom of the centrifuge, and add a constant electric field with an electric field strength of 200V / m outside the parallel magnetic field. As the negative pole, start the magnetic field, electric field, and cent...
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