Preparation method of tin oxide-graphene composite carbon film
A graphene composite and tin oxide technology, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of many steps and complicated operations, and achieve the effects of simple operation, simple preparation method, and reduced production costs
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Embodiment 1
[0019] Embodiment 1 prepares tin oxide-graphene composite carbon film
[0020] Take golden yellow 5mg ml -1 Add 20ml of GO aqueous dispersion (graphene oxide aqueous dispersion) to 200ml ethylene glycol, ultrasonically disperse for 30min, add 60mg tin tetrachloride powder and 3mg PVP (Mw=55000) and stir until completely dissolved, put Put it in the microwave and heat it for 150s. Cool, filter with suction, wash with distilled water three times, dry in a vacuum oven at 70°C for 10 hours, and then heat-treat at 550°C in an argon atmosphere for 3 hours to obtain a tin oxide-graphene composite carbon film, as shown in the photo figure 1 As shown, the charge-discharge cycle performance is as figure 2 shown by figure 2 It can be seen that the capacity can reach 650mAhg when the material is cycled 100 times -1 , the Coulombic efficiency (except for the first cycle) is higher than 97%, and can be directly used as the negative electrode of lithium-ion batteries.
Embodiment 2
[0021] Embodiment 2 prepares tin oxide-graphene composite carbon film
[0022] Take golden yellow 8mg ml -1 Add 12ml of the GO aqueous dispersion to 150ml ethylene glycol solution, ultrasonicate for 45min to disperse evenly, add 50mg of stannous chloride powder and 5mg of PVP (Mw=55000) and stir until completely dissolved, then heat in a microwave oven for 120s. Cool, filter with suction, wash with distilled water three times, dry in a vacuum oven at 70°C for 10 hours, and then heat-treat at 550°C for 3 hours in an argon atmosphere to obtain a tin oxide-graphene composite carbon film.
Embodiment 3
[0023] Embodiment 3 prepares tin oxide-graphene composite carbon film
[0024] Take golden yellow 10mg ml -1 Add 10ml of the GO aqueous dispersion into 100ml ethylene glycol solution, ultrasonicate for 30min to disperse evenly, add 80mg of stannous sulfate powder and 12mg of PVP (Mw=55000) and stir until completely dissolved, then heat in a microwave oven for 100s. Cool, filter with suction, wash with distilled water three times, dry in a vacuum oven at 70°C for 10 hours, and then heat-treat at 550°C for 3 hours in an argon atmosphere to obtain a tin oxide-graphene composite carbon film.
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