A preparation method of nitrogen-doped porous carbon/graphene two-dimensional composite electrode material
A composite material and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of large diffusion resistance and long diffusion path of electrolyte ions, and achieve improved conductivity, excellent power characteristics, The effect of increasing the specific capacitance
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Embodiment 1
[0020] Weigh a certain amount of concentrated graphene oxide solution and ultrasonically disperse it in 100ml of deionized water to obtain a 0.33mg / ml graphene oxide suspension, then add 1g of pyrrole monomer, stir for 0.5h under ice bath conditions, and then add 50g of 10 % ferric chloride solution, continue to stir the reaction for 7h. After suction filtration, washing and drying, the polypyrrole / graphene oxide two-dimensional composite material is obtained. In this embodiment, the mass ratio of pyrrole / graphene oxide is 30:1, and its scanning electron microscope photo is shown in figure 1 , wherein, presents a two-dimensional structure, the thickness of the material is about 30nm.
Embodiment 2
[0022] Weigh a certain amount of concentrated graphene oxide solution and ultrasonically disperse it in 100ml of deionized water to obtain a 0.2mg / ml graphene oxide suspension, then add 1g of pyrrole monomer, stir for 0.5h under ice bath conditions, and then add 50g of 10 % ferric chloride solution, continue to stir the reaction for 7h. After suction filtration, washing and drying, the polypyrrole / graphene oxide two-dimensional composite material is obtained. In the embodiment of the present invention, the mass ratio of pyrrole / graphene oxide is 50:1, and its scanning electron microscope photo is shown in figure 2 , wherein, presents a two-dimensional structure, the thickness of the material is about 58nm.
Embodiment 3
[0024] Weigh a certain amount of graphene oxide concentrated solution and ultrasonically disperse it in 100ml of deionized water to obtain a 0.125mg / ml graphene oxide suspension, then add 1g of pyrrole monomer, stir for 0.5h under ice bath conditions, and then add 50g of 10 % ferric chloride solution, continue to stir the reaction for 7h. After suction filtration, washing and drying, the polypyrrole / graphene oxide two-dimensional composite material is obtained. In the embodiment of the present invention, the mass ratio of pyrrole / graphene oxide is 80:1, and its scanning electron microscope photo is shown in image 3 , wherein, presents a two-dimensional structure, the thickness of the material is about 78nm.
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