A kind of preparation method of nitrogen-doped oriented graphene
A technology of graphene and nitrogen doping, which is applied in the field of preparation of nitrogen-doped oriented graphene, which can solve the problems of reducing the energy storage capacity of electrodes, easy agglomeration of surface energy, and electrolyte infiltration, etc., to achieve increased wettability and large specific surface area , the effect of high utilization rate
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Embodiment 1
[0026] Using natural flake graphite as raw material, graphite oxide was prepared by the improved hummers method; the graphite oxide obtained above was ultrasonicated for 60 minutes to form a uniformly mixed graphene oxide solution; 15 mL of ammonia water with a mass fraction of 28% was slowly dropped into the prepared A good 35mL concentration of graphene oxide solution of 2mg / ml; the configured mixture was stirred under a magnetic stirrer for 30min, then transferred to a reaction kettle containing a polytetrafluoroethylene liner; the reaction kettle containing the mixture was placed in React at 170°C for 6 hours; that is, nitrogen-doped graphene is obtained; nitrogen-doped graphene is subjected to directional vacuuming for 12 hours, and the vacuum degree is kept at 10 -5 ~10 -8 Pa, as the air pressure decreases, the water boils and vaporizes and then is drawn out in a directional manner. At the same time, the graphene is impacted, and the impacted graphene becomes an oriented...
Embodiment 2
[0033] Using natural flake graphite as raw material, graphite oxide was prepared by the improved hummers method; the graphite oxide obtained above was ultrasonicated for 60 minutes to form a uniformly mixed graphene oxide solution; 15 mL of ammonia water with a mass fraction of 28% was slowly dropped into the prepared A good 35mL concentration of graphene oxide solution of 2mg / ml; the configured mixture was stirred under a magnetic stirrer for 30min, then transferred to a reaction kettle containing a polytetrafluoroethylene liner; the reaction kettle containing the mixture was placed in React at 170°C for 12 hours; that is, nitrogen-doped graphene is obtained; nitrogen-doped graphene is subjected to directional vacuuming for 12 hours, and the vacuum degree is kept at 10 -5 ~10 -8 Pa, as the air pressure decreases, the water boils and vaporizes and then is drawn out in a directional manner. At the same time, the graphene is impacted, and the impacted graphene becomes an oriente...
Embodiment 3
[0039]The structures and N-doping conditions of the products obtained at different times were compared.
[0040] Using natural flake graphite as raw material, graphite oxide was prepared by the improved hummers method; the graphite oxide obtained above was ultrasonicated for 60 minutes to form a uniformly mixed graphene oxide solution; 15 mL of ammonia water with a mass fraction of 28% was slowly dropped into the prepared A good 35mL concentration of graphene oxide solution of 2mg / ml; the configured mixture was stirred under a magnetic stirrer for 30min, then transferred to a reaction kettle containing a polytetrafluoroethylene liner; the reaction kettle containing the mixture was placed in React at 170°C for 6h, 9h, 12h, and 20h respectively to prepare graphene with different nitrogen doping concentrations, which are named N-G-6h, N-G-9h, N-G-12h, and N-G-20h to orient nitrogen-doped graphene Vacuumize for 12 hours and keep the vacuum at 10 -5 ~10 -8 Pa, as the air pressure...
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