Preparation method of stannic oxide particle/graphene nano-composite negative electrode material
A nanocomposite, negative electrode material technology, applied in the direction of battery electrodes, electrochemical generators, electrical components, etc., can solve the problems of unfavorable large-scale production, complicated process, harsh preparation conditions, etc., and achieve low cost, wide source of raw materials, The effect of simple preparation method
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Embodiment 1
[0030] (1) 50mg SnCl 2 2H 2 O was dissolved in 40 mL of absolute ethanol by stirring to prepare a tin ethanol solution with a concentration of 1.25 mg / mL;
[0031] (2) 40 mg of graphene oxide was uniformly dispersed in 40 mL of deionized water by ultrasonic treatment (the frequency of ultrasonic treatment was 40KHz, and the time was 0.5 h) to prepare a graphene oxide solution with a concentration of 1 mg / mL;
[0032] (3) The ethanol solution of tin obtained in step (1) was added dropwise into the graphene oxide solution obtained in step (2) at 25°C by stirring, and the stirring was continued for 3 h to obtain a mixed solution;
[0033] (4) After centrifuging and rinsing the mixed solution obtained in step (3), the obtained precipitate was dried at 60°C for 12 hours, then heat-treated at 300°C for 3 hours in an argon atmosphere, and cooled in the furnace to obtain oxidized Tin particle / graphene nanocomposite anode material.
[0034] figure 1 It is an X-ray diffraction pa...
Embodiment 2
[0036] (1) 80mg SnCl 4 5H 2 O was dissolved in 40 mL of absolute ethanol by stirring to prepare a tin ethanol solution with a concentration of 2 mg / mL;
[0037] (2) 50 mg of graphene oxide was uniformly dispersed in 40 mL of deionized water by ultrasonic treatment (the frequency of ultrasonic treatment was 25KHz, and the time was 5 h) to prepare a graphene oxide solution with a concentration of 1.25 mg / mL;
[0038] (3) Add the tin ethanol solution obtained in step (1) dropwise into the graphene oxide solution obtained in step (2) at 35°C by stirring, and continue stirring for 2 hours to obtain a mixed solution;
[0039] (4) After centrifuging and rinsing the mixture obtained in step (3), the obtained precipitate was dried at 90°C for 3 hours, then heat-treated at 400°C for 2 hours in an argon atmosphere, and cooled in the furnace to obtain the oxidized Tin particle / graphene nanocomposite anode material.
[0040] According to the X-ray diffraction pattern, it is determined ...
Embodiment 3
[0042] (1) 75mg SnSO 4 Dissolve in 50 mL of absolute ethanol by stirring to prepare a tin ethanol solution with a concentration of 1.5 mg / mL;
[0043] (2) 37.5 mg of graphene oxide was uniformly dispersed in 50 mL of deionized water by ultrasonic treatment (the frequency of ultrasonic treatment was 25 KHz, and the time was 3 h) to prepare a graphene oxide solution with a concentration of 0.75 mg / mL;
[0044] (3) adding the tin ethanol solution obtained in step (1) dropwise into the graphene oxide solution obtained in step (2) at 55°C by stirring, and continuously stirring for 1 hour to obtain a mixed solution;
[0045] (4) After centrifuging and rinsing the mixture obtained in step (3), the obtained precipitate was dried at 70°C for 6h, then heat-treated at 450°C for 1.5h in an argon atmosphere, and cooled in the furnace to obtain Tin oxide particle / graphene nanocomposite anode material.
[0046] According to the X-ray diffraction pattern, it is determined that the main crys...
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